CBRE GROUP, INC.  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued) 88 Our annual assessment of goodwill and other intangible assets deemed to have indefinite lives has historically been completed as of the beginning of the fourth quarter of each year.
We performed the 2018, 2017 and 2016 assessments as of October 1.
When we performed our required annual goodwill impairment review as of October 1, 2018, 2017 and 2016, we determined that no impairment existed as the estimated fair value of our reporting units was in excess of their carrying value.
Other intangible assets totaled $1.4 billion, net of accumulated amortization of $1.2 billion as of December 31, 2018, and $1.4 billion, net of accumulated amortization of $1.0 billion, as of December 31, 2017 and are comprised of the following (dollars in thousands):
## Table 0 ##
Unamortizable intangible assets include management contracts identified as a result of the REIM Acquisitions relating to relationships with open-end funds, a trademark separately identified as a result of the 2001 Acquisition and a trade name separately identified in connection with the REIM Acquisitions, which represents the Clarion Partners trade name in the U. S.  These intangible assets have indefinite useful lives and accordingly are not being amortized.
Customer relationships relate to existing relationships acquired through acquisitions mainly in the brokerage, occupier outsourcing and property management lines of business that are being amortized over useful lives of up to 20 years.
Mortgage servicing rights represent the carrying value of servicing assets in our mortgage brokerage line of business in the U. S.  The mortgage servicing rights are being amortized over the estimated period that net servicing income is expected to be received, which is typically up to ten years.
In connection with the GWS Acquisition, trademarks of approximately $280 million were separately identified and are being amortized over 20 years.
Management contracts consist primarily of asset management contracts relating to relationships with closedend funds and separate accounts in the U. S. , Europe and Asia that were separately identified as a result of the REIM Acquisitions.
These management contracts are being amortized over useful lives of up to 13 years.
A covenant not to compete of approximately $74 million was separately identified in connection with the GWS Acquisition and was amortized over three years.
Other amortizable intangible assets mainly represent transition costs, which primarily get amortized to cost of services over the life of the associated contract.
## Table 1 ##
(a) Amounts include aggregate principal payments only.
The Company paid $502,807, $465,388 and $397,886 for interest on debt, inclusive of derivative instruments, for the years ended December 31, 2007, 2006 and 2005, respectively.
(b) Minimum basic rent due for various office space the Company leases and fixed base rent due on ground leases for two properties.
(c) Estimated payments to the Company’s Chairman, two former CEO’s and its former chief operating officer based on planned retirement dates.
Critical Accounting Policies and Estimates The Company’s significant accounting policies are described in Note 2 in the Notes to Consolidated Financial Statements.
These policies were followed in preparing the consolidated financial statements at and for the year ended December 31, 2007 and are consistent with the year ended December 31, 2006.
The Company has identified six significant accounting policies as critical accounting policies.
These critical accounting policies are those that have the most impact on the reporting of our financial condition and those requiring significant judgments and estimates.
With respect to these critical accounting policies, management believes that the application of judgments and estimates is consistently applied and produces financial information that fairly presents the results of operations for all periods presented.
The six critical accounting policies are: Impairment of Long-Lived Assets, Including Goodwill The Company periodically evaluates its long-lived assets, including its investments in real estate and goodwill, for indicators of permanent impairment.
The judgments regarding the existence of impairment indicators are based on factors such as operational performance, market conditions, expected holding period of each asset and legal and environmental concerns.
Future events could occur which would cause the Company to conclude that impairment indicators exist and an impairment loss is warranted.
Depreciation of Investment in Real Estate The Company depreciates the building component of its investment in real estate over a 30-year estimated useful life, building improvements over a 5-year to 10-year estimated useful life and both the furniture, fixtures and equipment and replacements components over a 5-year estimated useful life, all of which are judgmental determinations.
Cost Capitalization See the Capitalization of Fixed Assets and Improvements to Real Estate section for discussion of the policy with respect to capitalization vs.  expensing of fixed asset/repair and maintenance costs.
In addition, the Company capitalizes the payroll and associated costs of employees directly responsible for and who spend all of their time on the supervision of major capital and/or renovation projects.
These costs are reflected on the balance sheet as an increase to depreciable property.
The Company follows the guidance in SFAS No.67, Accounting for Costs and Initial Rental Operations of Real Estate Projects, for all development projects and uses its professional judgment in determining whether such costs meet the criteria for capitalization or must be expensed as incurred.
The Company capitalizes interest, real estate taxes and insurance and payroll and associated costs for those
McKESSON CORPORATION FINANCIAL REVIEW (Continued) 30 Canadian pharmaceutical distribution revenues increased over the last two years primarily reflecting market growth rates and favorable foreign exchange rates.
Additionally in 2008, these revenues benefited from new and expanded business, partially offset by six fewer days of sales compared to 2007.
Canadian revenues benefited from a 12%, 5% and 7% foreign currency impact in 2008, 2007 and 2006.
Medical-Surgical distribution and services revenues increased in 2008 primarily reflecting market growth rates and an acquisition, partially offset by the discontinuance of the distribution of a product line.
Revenues associated with this product line are now recorded by our U. S.  pharmaceutical distribution business.
In 2008, these revenues were partially offset by one less week of sales compared to 2007.
In 2007, revenues increased primarily reflecting stronger than average market growth rates and due to the acquisition of Sterling Medical Services LLC (“Sterling”) during the first quarter of 2007.
Sterling is a national provider and distributor of disposable medical supplies, health management services and quality management programs to the home care market.
Technology Solutions revenues increased in 2008 primarily due to the acquisition of Per-Se and increased services revenues, primarily reflecting the segment’s expanded customer bases and clinical software implementations.
During the fourth quarter of 2007, we acquired Per-Se, a leading provider of financial and administrative healthcare solutions for hospitals, physicians and retail pharmacies.
In 2007, revenues for this segment benefited from increased clinical software implementations and to a lesser extent, our acquisition of Per-Se.
## Table 2 ##
Gross profit increased 16% to $5.0 billion in 2008 and 15% to $4.3 billion in 2007.
As a percentage of revenues, gross profit increased 27 bp in 2008 and 32 bp in 2007.
Gross profit margin increased in 2008 primarily reflecting a greater proportion of higher margin Technology Solutions products and an improvement in our Distribution Solutions segment’s margin.
Gross profit margin increased in 2007 primarily due to an increase in our Distribution Solutions segment’s gross profit margin.
In 2008, our Distribution Solutions segment’s gross profit margin increased slightly from that of the prior year.
Gross profit margin was impacted by higher buy side margins, the benefit of increased sales of generic drugs with higher margins, a decline in impairment charges associated with the write-down of certain abandoned assets within our retail automation group and an increase associated with a smaller proportion of revenues within the segment attributed to sales to customers’ warehouses.
These increases were partially offset by a decline in sell margin and last-in, first-out (“LIFO”) inventory credits ($14 million in 2008 compared with $64 million in 2007).
For each of the last three years, we estimate that the Company’s total gross profit margin on sales to customers’ warehouses represented about 5% of the segment’s total gross profit dollars.
As previously discussed, from 2006 to 2007 the percentage of total direct and warehouse revenue attributed to our retail chain customers grew faster than our other customer groups.
This change resulted in a negative impact on the Company’s gross profit margin as this customer group typically has lower margins as compared to our other customer groups.
From 2007 to 2008, the percentage of total direct and warehouse revenue attributed to our retail chain customers grew slower than our other customer groups.
This decline resulted in a positive impact on the Company’s gross profit margin.
2006 increased 4% over 2005, primarily reflecting growth in Bond & Financial Products and the absence of catastrophe-related reinstatement premiums.
The $1.30 billion increase in earned premiums in 2005 over 2004 primarily reflected the impact of the merger, which was partially offset by a significant decline in earned premiums in the Business Insurance segment’s runoff operations and a decline in certain of Business Insurance’s ongoing operations due to a lower level of net written premium volume in the last half of 2004 and first half of 2005.
Earned premiums in 2005 were reduced by the $121 million of reinstatement premiums related to catastrophe losses.
Earned premiums in 2004 were reduced by $76 million of reinstatement premiums primarily related to reserve charges recorded in the surety operation.
Partially offsetting these factors were the impacts of new business growth and increased retention in many of the Company’s insurance operations in 2005.
Net Investment Income The following table sets forth information regarding the Company’s investments.

<table><tr><td></td><td colspan="4">December 31,</td></tr><tr><td></td><td colspan="2">2018</td><td colspan="2">2017</td></tr><tr><td></td><td>GrossCarryingAmount</td><td>Accumulated Amortization</td><td>GrossCarryingAmount</td><td>Accumulated Amortization</td></tr><tr><td>Unamortizable intangible assets:</td><td></td><td></td><td></td><td></td></tr><tr><td>Management contracts</td><td>$86,585</td><td></td><td>$90,503</td><td></td></tr><tr><td>Trademarks</td><td>56,800</td><td></td><td>56,800</td><td></td></tr><tr><td>Trade names</td><td>16,250</td><td></td><td>16,250</td><td></td></tr><tr><td></td><td>159,635</td><td></td><td>163,553</td><td></td></tr><tr><td>Amortizable intangible assets:</td><td></td><td></td><td></td><td></td></tr><tr><td>Customer relationships</td><td>843,387</td><td>$-435,225</td><td>802,597</td><td>$-355,642</td></tr><tr><td>Mortgage servicing rights</td><td>697,322</td><td>-272,852</td><td>608,757</td><td>-235,626</td></tr><tr><td>Trademarks/Trade name</td><td>312,699</td><td>-76,514</td><td>321,406</td><td>-64,866</td></tr><tr><td>Management contracts</td><td>200,251</td><td>-135,835</td><td>203,291</td><td>-122,450</td></tr><tr><td>Covenant not to compete</td><td>73,750</td><td>-73,750</td><td>73,750</td><td>-57,358</td></tr><tr><td>Other</td><td>334,657</td><td>-186,217</td><td>226,496</td><td>-164,796</td></tr><tr><td></td><td>2,462,066</td><td>-1,180,393</td><td>2,236,297</td><td>-1,000,738</td></tr><tr><td>Total intangible assets</td><td>$2,621,701</td><td>$-1,180,393</td><td>$2,399,850</td><td>$-1,000,738</td></tr></table>
<table><tr><td> </td><td colspan="7"> Payments Due by Year (in thousands)</td></tr><tr><td> Contractual Obligations</td><td> 2008</td><td> 2009</td><td> 2010</td><td> 2011</td><td> 2012</td><td> Thereafter</td><td> Total</td></tr><tr><td>Debt (a)</td><td>$541,001</td><td>$915,758</td><td>$831,396</td><td>$1,545,099</td><td>$1,046,986</td><td>$4,628,493</td><td>$9,508,733</td></tr><tr><td>Operating Leases:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Minimum Rent Payments (b)</td><td>6,491</td><td>5,733</td><td>5,154</td><td>3,356</td><td>987</td><td>59,259</td><td>80,980</td></tr><tr><td>Other Long-Term Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c)</td><td>813</td><td>1,454</td><td>1,454</td><td>2,058</td><td>2,058</td><td>12,810</td><td>20,647</td></tr><tr><td>Total</td><td>$548,305</td><td>$922,945</td><td>$838,004</td><td>$1,550,513</td><td>$1,050,031</td><td>$4,700,562</td><td>$9,610,360</td></tr></table>
<table><tr><td></td><td colspan="3"> Years Ended March 31,</td></tr><tr><td><i>(Dollars in millions)</i></td><td> 2008</td><td> 2007</td><td> 2006</td></tr><tr><td>Gross Profit</td><td></td><td></td><td></td></tr><tr><td>Distribution Solutions</td><td>$3,586</td><td>$3,252</td><td>$2,883</td></tr><tr><td>Technology Solutions</td><td>1,423</td><td>1,080</td><td>894</td></tr><tr><td>Total</td><td>$5,009</td><td>$4,332</td><td>$3,777</td></tr><tr><td>Gross Profit Margin</td><td></td><td></td><td></td></tr><tr><td>Distribution Solutions</td><td>3.63%</td><td>3.58%</td><td>3.39%</td></tr><tr><td>Technology Solutions</td><td>47.69</td><td>48.24</td><td>48.48</td></tr><tr><td>Total</td><td>4.93</td><td>4.66</td><td>4.34</td></tr></table>

Question: What is the sum of Customer relationships of GrossCarryingAmount in 2018 and Debt (a) of Contractual Obligations in 2009? (in thousand)
Answer: 1759145