Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified							12 Months Ended				12 Months Ended				12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Land [Member]	Dec. 31, 2012 Land [Member]	Dec. 31, 2013 Building and leasehold improvements [Member]	Dec. 31, 2012 Building and leasehold improvements [Member]	Dec. 31, 2013 Building and leasehold improvements [Member] Minimum [Member]	Dec. 31, 2013 Building and leasehold improvements [Member] Maximum [Member]	Dec. 31, 2013 Computer equipment and purchased software [Member]	Dec. 31, 2012 Computer equipment and purchased software [Member]	Dec. 31, 2013 Computer equipment and purchased software [Member] Minimum [Member]	Dec. 31, 2013 Computer equipment and purchased software [Member] Maximum [Member]	Dec. 31, 2013 Furniture and fixtures [Member]	Dec. 31, 2012 Furniture and fixtures [Member]	Dec. 31, 2013 Furniture and fixtures [Member] Maximum [Member]	Dec. 31, 2013 Transportation equipment [Member]	Dec. 31, 2012 Transportation equipment [Member]	Dec. 31, 2013 Transportation equipment [Member] Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives							5 years	39 years			3 years	5 years			5 years			5 years
Property and equipment, Gross	$ 96,469	$ 73,517	$ 7,800	$ 7,800	$ 50,523	$ 33,299			$ 27,071	$ 24,036			$ 10,834	$ 8,108		$ 241	$ 274
Accumulated depreciation and amortization	(31,625)	(28,136)
Property and equipment, net	$ 64,844	$ 45,381