Schedule of Balances Related to Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property Plant And Equipment [Abstract]
Building and leasehold improvements	$ 6,400	$ 2,300
Equipment and furniture	80,600	89,600
Computer software	97,000	92,600
Property and Equipment, Gross	184,000	184,500
Less accumulated depreciation	(139,433)	(141,793)
Property and equipment, net	$ 44,617	$ 42,695