|**Application of Recent Accounting Pronouncements**                               | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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|**New Accounting Pronouncements and Changes in Accounting Principles [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Application of Recent Accounting Pronouncements                                   | Application of Recent Accounting PronouncementsRecently adopted accounting pronouncementsIn May, 2014, the FASB issued ASU 2014-09,Revenue from Contracts with Customers,and all the related amendments to customer contracts (collectively “ASC 606”), effective for interim and annual periods beginning after December 15, 2017.  ASC 606 supersedes nearly all existing revenue recognition guidance under U.S. GAAP; however, it did not impact the accounting for insurance and investment contracts within the scope of financial services insurance, leases, financial instruments and guarantees. The core principle of the model requires that an entity recognizes revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. The update also requires increased disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts. See Note 10 for additional information.On January 1, 2018, the Company adopted ASC 606 using the modified retrospective method. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under ASC 605, Revenue Recognition (“ASC 605”).The primary impact of ASC 606 to the Company relates to the accounting for certain contract costs and contract fulfillment costs, which were expensed as incurred under ASC 605. Under ASC 606, these costs are deferred and amortized over the expected life of the customer contract, which the Company determined to be10 years. The Company presents these contract costs and contract fulfillment costs on the condensed consolidated balance sheet as a part of the DAC and VOBA balance.The Company recorded a net increase to opening retained earnings of$32,952, net of tax, as of January 1, 2018 due to the cumulative impact of adopting ASC 606.In January, 2016, the FASB issued ASU 2016-01,Recognition and Measurement of Financial Assets and Financial Liabilities, effective for interim and annual periods beginning after December 15, 2017.  The amendments in this update address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments including requiring equity investments (except those accounted for under the equity method of accounting) to be measured at fair value with changes in fair value recognized in net income, eliminating certain disclosure requirements related to financial instruments measured at amortized cost, and adding disclosures related to the measurement categories of financial assets and financial liabilities.  The primary impact to the Company’s condensed consolidated financial statements was that the Company’s limited partnership interests, that were accounted for under the cost method, are now measured at fair value with changes in the fair value recognized in net income.  The adoption of this standard did not have a material impact on the Company’s condensed consolidated financial statements.In August 2016, the FASB issued ASU 2016-15,Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments (a consensus of the Emerging Issues Task Force), effective for fiscal years and interim periods within those beginning after December 15, 2017. This ASU addresses diversity in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The primary impacts to the Company’s condensed consolidated financial statement include reclassification of proceeds received from the settlement of corporate-owned life insurance policies (“COLI”) from cash flow from operations to cash flow from investing and reclassification of certain change in due to / from parent and affiliate from investing to operating.  As the Company has retroactively applied this guidance as required by the ASU, the following updates were made to the condensed consolidated cash flow statement for thesix months ended June 30, 2017to conform to current year presentation:•Reclassification of proceeds received from the settlement of COLIs of$1,680from cash flow from operations to cash flows from investing; and•Reclassification of change in due to / from parent and affiliate of$21,388from cash flow from financing to cash flows from operations.In November 2016, the FASB issued ASU 2016-18,Statement of Cash Flows: Restricted Cash (a consensus of the Emerging Issues Task Force), effective for fiscal years and interim periods within those beginning after December 15, 2017. This update requires organizations to show the changes in the total of cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. The adoption of this standard did not have a material impact on the condensed consolidated financial statements.In March 2017, the FASB issued ASU 2017-07,Compensation-Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, effective for annual reporting periods beginning on or after December 15, 2017, and interim periods within those annual periods. This update requires organizations to disaggregate the service cost component from the other components of net benefit costs in the income statement and present it with other current compensation costs for the related employees while providing guidance for capitalization eligibility for service costs. The adoption of this standard did not have a material impact on the condensed consolidated financial statements.Future adoption of new accounting pronouncementsIn February 2016, the FASB issued ASU 2016-02,Leases, and all the related amendments to leases (collectively “ASU 2016-02”) effective for annual reporting periods beginning on or after December 15, 2018, and interim periods within those annual periods. Earlier application is permitted as of the beginning of an interim or annual period. This update requires organizations to recognize lease assets and lease liabilities on the balance sheet with lease terms of more than 12 months and also disclose certain qualitative and quantitative information about leasing arrangements. The Company’s implementation efforts are primarily focused on identifying a new lease accounting system, the review of its existing lease contracts and performing a completeness assessment over the lease population. The Company continues to evaluate the impact of this update on its condensed consolidated financial statements.In June 2016, the FASB issued ASU 2016-13,Financial Instruments: Credit Losses: Measurement of Credit Losses on Financial Instruments, effective for fiscal years and interim periods within those beginning after December 15, 2019. Early adoption is permitted for fiscal years beginning after December 15, 2018. This update amends guidance on the impairment of financial instruments by adding an impairment model that is based on expected losses rather than incurred losses and is intended to result in more timely recognition of losses. The standard also simplifies the accounting by decreasing the number of credit impairment models that an entity can use to account for debt instruments. The Company continues to evaluate the impact of this update on its condensed consolidated financial statements.In January 2017, the FASB issued ASU 2017-04,Intangibles - Goodwill and Other, effective for annual or any interim goodwill impairment tests after December 15, 2019.  Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017.  The update eliminates Step 2 from the goodwill impairment test and will require management to perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount.  Any amount by which the carrying amount exceeds the reporting unit’s fair value (not to exceed the goodwill allocated to that reporting unit) is recognized as an impairment charge.  The Company performs its goodwill impairment annually in the 4th quarter or more frequently if events or circumstances indicate that there may be justification for performing an interim test.  The adoption of this standard is not anticipated to have a material impact on the condensed consolidated financial statements.
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|•                                                                                 | Reclassification of proceeds received from the settlement of COLIs of$1,680from cash flow from operations to cash flows from investing; and                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         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|•                                                                                 | Reclassification of change in due to / from parent and affiliate of$21,388from cash flow from financing to cash flows from operations.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              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