Accounts Payable and Other Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Accounts payable and other accrued expenses
Trade accounts payable	$ 30,288				$ 22,014
Accrued payroll	14,260				9,333
Bonus accrual	6,300				7,528
Other payroll related expenses	4,137				4,265
Accrued interest	3,337				1,414
Accrued rent and property taxes	14,064				13,350
Accrual for expected losses on credit service letters of credit	4,708				2,623
Collected funds payable to unaffiliated lenders under credit service programs	1,026				1,036
Deferred revenues	7,038				5,464
Other accrued expenses	9,835				13,830
Total	$ 94,993	$ 89,217	$ 70,643	$ 77,880	$ 80,857	$ 72,988	$ 63,073	$ 69,971