Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 19,789	$ 11,713
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	(15,485)	(11,744)	$ 64,589
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	5,570	11,226	1,807
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	2,149	1,376	1,496
Unrecognized Tax Benefits, Period Increase (Decrease)	1,513	809	681
Foreign Income Tax Expense (Benefit), Continuing Operations	0	1,048	3,231
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	1,603	8,936	1,356
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0	0	716
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	249	939	0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	1,352	347	(50)
Income Tax Expense (Benefit)	(3,049)	12,937	$ 73,826
Deferred Tax Assets, Tax Credit Carryforwards, Research	1,448	1,580
Deferred Tax Liabilities, Intangible Assets	0	2,203
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	1,781	1,130
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves	1,969	2,362
Deferred Tax Assets, Capital Loss Carryforwards	1,213	1,866
Deferred Tax Assets, Other	9,609	6,642
Deferred Tax Assets, Gross	42,998	32,157
Deferred Tax Assets, Valuation Allowance	(22,143)	(13,271)
Deferred Tax Assets, Net of Valuation Allowance	20,855	18,886
Deferred Tax Liabilities, Financing Arrangements	308	2,981
Deferred Tax Liabilities, Intangible Assets	(20,720)	(28,214)
Deferred Tax Liabilities, Other	311	0
Deferred Tax Liabilities, Gross	(21,339)	(31,195)
Deferred Tax Liabilities, Net	(484)	(12,309)
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses	$ 7,189	$ 4,661