Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	$ 103,296	$ 91,680
Valuation allowance	(999)	(2,160)
Deferred tax assets, net of valuation allowance	102,297	89,520
Deferred tax liabilities, gross	18,933	16,521
Deferred tax liabilities, net	18,933	16,521
Depreciation and amortization
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	0	0
Deferred tax liabilities, gross	6,424	3,450
Share-based compensation
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	307	451
Deferred tax liabilities, gross	0	0
Accruals and prepaids
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	5,613	6,586
Deferred tax liabilities, gross	0	0
Bad debts
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	6,139	2,727
Deferred tax liabilities, gross	0	0
Acquired intangible assets
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	0	0
Deferred tax liabilities, gross	12,509	13,071
Net operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	37,242	33,247
Deferred tax liabilities, gross	0	0
Tax credit carryforwards (primarily Minimum Alternative Tax ("MAT") in India)
Operating Loss Carryforwards [Line Items]
Total deferred income tax assets	53,995	48,669
Deferred tax liabilities, gross	$ 0	$ 0