Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Compensation and benefits	$ 30,680	$ 31,677
Depreciation and amortization	2,637	2,699
Cumulative translation adjustment	17,503	10,942
Operating loss carryforwards	3,906	4,594
Capital loss carryforwards	2,426	2,581
Foreign tax credit carryforwards	312	351
Other financial accruals	1,346	332
Valuation allowances	(2,738)	(2,932)
Total deferred tax assets	56,072	50,244
Deferred tax liabilities:
Unrealized gain on investments	242	362
Other financial accruals	1,338	0
Total deferred tax liabilities	1,580	362
Net deferred tax asset	$ 54,492	$ 49,882