Loans and Finance Receivables, Credit Quality Information and Allowances and Liabilities for Estimated Losses on Loans and Finance Receivables - Schedule of Revenue Generated from Loans and Finance Receivables (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Total loans and finance receivables revenue	$ 174,077	$ 165,271
Other	576	405
Total revenue	174,653	165,676
Short-term Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans and finance receivables revenue	47,598	50,861
Line of Credit Accounts
Accounts Notes And Loans Receivable [Line Items]
Total loans and finance receivables revenue	48,973	55,653
Installment Loans and RPAs
Accounts Notes And Loans Receivable [Line Items]
Total loans and finance receivables revenue	$ 77,506	$ 58,757