Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Liabilities Disclosure [Abstract]
Reserve for potential uncertain income tax return positions	$ 3,115	$ 3,020	$ 12,742	$ 5,925
Unfavorable lease liability, long term portion	0	294
Portion of an unrecognized tax benefit netted against deferred tax asset for net operating loss carry forwards	(341)	(1,135)
Sub-leased office liability (net of future sublease proceeds)	558	0
Total	$ 3,332	$ 2,179