Income Taxes - Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Compensation and benefits	$ 21,706	$ 19,353
Depreciation and amortization	1,816	1,539
Cumulative translation adjustment	12,235	12,624
Operating loss carryforwards	4,644	5,256
Capital loss carryforwards	1,874	1,909
Lease asset	7,652
Other financial accruals	3,760	5,488
Valuation allowances	(2,409)	(2,463)
Total deferred tax assets	51,278	43,706
Deferred tax liabilities:
Lease liability	6,959
Other financial accruals	5,045	3,990
Total deferred tax liabilities	12,004	3,990
Net deferred tax asset	$ 39,274	$ 39,716