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Property and Equipment | 12 Months Ended
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Dec. 31, 2017
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment consist of the following at fiscal year end:
|  | Useful Life |  | 2017 |  | 2016
|  | (Years) |  | (In thousands)
Land |  | — |  |  | $ | 129,421 |  |  | $ | 116,517 |
Buildings and improvements |  | 2 to 50 |  |  | 2,009,279 |  |  | 1,853,409 |
Leasehold improvements |  | 1 to 29 |  |  | 288,614 |  |  | 270,760 |
Equipment |  | 3 to 10 |  |  | 193,281 |  |  | 186,095 |
Furniture, fixtures and computer software |  | 1 to 7 |  |  | 57,204 |  |  | 52,225 |
Facility construction in progress |  |  |  | 74,312 |  |  | 14,574 |
Total |  |  |  | $ | 2,752,111 |  |  | $ | 2,493,580 |
Less accumulated depreciation and amortization |  |  |  | (673,988 | ) |  | (596,339 | )
Property and equipment, net |  |  |  | $ | 2,078,123 |  |  | $ | 1,897,241 |
The Company depreciates its leasehold improvements over the shorter of their estimated useful lives or the terms of the leases including renewal periods that are reasonably assured. The Company’s construction in progress primarily consists of expansions to facilities that are owned by the Company. Interest capitalized in property and equipment for the years ended December 31, 2017 and December 31, 2016 was not significant. Depreciation expense was $98.9 million, $92.8 million and $85.9 million, respectively, for the years ended December 31, 2017, 2016 and 2015, respectively. At both December 31, 2017 and 2016, the Company had $17.1 million of assets recorded under capital leases related to land, buildings and improvements. Capital leases are recorded net of accumulated amortization of $12.2 million and $11.2 million, at December 31, 2017 and 2016, respectively. Depreciation expense related to assets recorded under capital leases for each of the years ended December 31, 2017, 2016 and 2015 was $1.0 million and is included in Depreciation and Amortization in the accompanying consolidated statements of operations.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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