Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Accrued professional liabilities	$ 52,552	$ 41,802
Contingent purchase price payable	0	8,470
Deferred rent	18,958	16,814
Tax-effected unrecognized benefits	3,426	8,353
Other	21,247	14,004
Other long-term liabilities	$ 96,183	$ 89,443