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Property and Equipment
 12 Months Ended
Dec. 31, 2015
Property and Equipment [Abstract]  
Property and Equipment

4.     Property and Equipment

The composition of property and equipment as of December 31, 2014 and 2015 is as follows (in thousands):

 

 

2014

 

2015

 

Estimated useful
life (years)

Land

 

$

7,138

 

 

$

7,138

 

 

—

Buildings and improvements

 

 

18,998

 

 

 

19,109

 

 

5–40

Furniture, equipment, and computer hardware and software

 

 

153,417

 

 

 

150,597

 

 

5–10

Leasehold improvements

 

 

38,732

 

 

 

38,639

 

 

3–10

Construction in progress

 

 

1,942

 

 

 

4,251

 

 

—

 

 

 

220,227

 

 

 

219,734

 

 

 

Accumulated depreciation and amortization

 

 

(137,961

)

 

 

(142,595

)

 

 

 

 

$

82,266

 

 

$

77,139

 

 

 

Construction in progress includes costs associated with the construction and renovation of campuses and the development of information technology applications. In 2014 and 2015, the Company recorded leasehold improvements of $0.1 million and $2.9 million, respectively, which were reimbursed by lessors as lease incentives. In 2014 and 2015, the Company wrote off $13.6 million and $13.3 million, respectively, in fixed assets that were fully depreciated and no longer in service.