Loans and Finance Receivables, Credit Quality Information and Allowances and Liabilities for Estimated Losses on Loans and Finance Receivables - Components of Company-Owned Loans and Finance Receivables (Detail) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Accounts Notes And Loans Receivable [Line Items]
Current receivables		$ 445,212	$ 447,914	$ 289,229
Delinquent payment amounts	[1]	4,574	4,582	4,460
Receivables on non-accrual status		46,120	49,459	36,586
Total delinquent receivables		50,694	54,041	41,046
Total loans and finance receivables, gross		495,906	501,955	330,275
Less: Allowance for losses		(67,704)	(67,322)	(51,220)	$ (64,948)
Loans and finance receivables, net		428,202	434,633	279,055
Short-term Loans
Accounts Notes And Loans Receivable [Line Items]
Current receivables		36,263	37,951	31,678
Receivables on non-accrual status		16,118	20,842	17,334
Total delinquent receivables		16,118	20,842	17,334
Total loans and finance receivables, gross		52,381	58,793	49,012
Less: Allowance for losses		(11,693)	(14,652)	(12,744)	(14,324)
Loans and finance receivables, net		40,688	44,141	36,268
Line of Credit Accounts
Accounts Notes And Loans Receivable [Line Items]
Current receivables		91,482	92,732	69,912
Delinquent payment amounts	[1]	3,105	3,072	3,158
Receivables on non-accrual status		3,764	5,051	3,126
Total delinquent receivables		6,869	8,123	6,284
Total loans and finance receivables, gross		98,351	100,855	76,196
Less: Allowance for losses		(15,284)	(15,727)	(12,340)	(19,749)
Loans and finance receivables, net		83,067	85,128	63,856
Installment Loans and RPAs
Accounts Notes And Loans Receivable [Line Items]
Current receivables		317,467	317,231	187,639
Delinquent payment amounts	[1]	1,469	1,510	1,302
Receivables on non-accrual status		26,238	23,566	16,126
Total delinquent receivables		27,707	25,076	17,428
Total loans and finance receivables, gross		345,174	342,307	205,067
Less: Allowance for losses		(40,727)	(36,943)	(26,136)	$ (30,875)
Loans and finance receivables, net		$ 304,447	$ 305,364	$ 178,931

[1] Represents the delinquent portion of installment loans and line of credit account balances for customers that have only missed one payment. See “Current and Delinquent Loans and Finance Receivables” above for additional information.