| **Stockholders' Equity** | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
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| **Equity [Abstract]**    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| Stockholders' Equity     | Stockholders’ EquityIssuance of Common Stock for Director’s FeesOn May 17, 2016, the Board approved the issuance of 8,919 restricted stock awards to three members of the Board of Directors as part of their compensation package and pursuant to the 2015 Performance and Equity Incentive Plan.  These restricted stock awards vested 25% on the date of issue with the remaining balance vesting 25% on August 17, 2016, November 17, 2016 and February 17, 2017.  For the six months ended June 30, 2016, the Company recorded expense of less than $0.1 million, related to restricted stock awards to the Company’s directors.  Stock Repurchase ProgramAs of January 1, 2016, the Company had a total authority of $205.7 million available for purchase of shares of its common stock pursuant to its stock repurchase program (the “Stock Repurchase Program”).  During the six months ended June 30, 2016, the Company repurchased 995,650 shares of its common stock at an average purchase price of $14.88 per share, for an aggregate purchase price of $14.8 million, pursuant to its Stock Repurchase Program.  As of June 30, 2016, the Company had a total authority of $190.9 million remaining available for purchase of shares under its Stock Repurchase Program.  The Company may repurchase its common stock in open market purchases from time to time, in privately negotiated transactions or otherwise, pursuant to Rule 10b-18 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”).  The timing and amount of any additional shares to be repurchased will depend upon a variety of factors, including market and business conditions and other factors.  Repurchases may be commenced or suspended at any time or from time to time without prior notice.  The Stock Repurchase Program will continue until otherwise modified or terminated by the Company’s Board of Directors at any time in its sole discretion. |

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| - Definition
The entire disclosure for accounts comprising shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income, and compensation-related costs for equity-based compensation. Includes, but is not limited to, disclosure of policies, compensation plan details, equity-based arrangements to obtain goods and services, deferred compensation arrangements, and employee stock purchase plan details.
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