Fair Value of Financial Instruments Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Carrying Value
Financial assets:
Cash and cash equivalents	$ 110,408	$ 114,423	$ 73,148
Fees and service charges receivable	40,022	42,736	38,021
Total assets	490,502	525,429	447,883
Financial liabilities:
Total liabilities	383,000	407,000	337,000
Carrying Value | Pawn loans
Financial assets:
Loans receivable	322,625	344,748	314,505
Carrying Value | Consumer loans, net
Financial assets:
Loans receivable	17,447	23,522	22,209
Carrying Value | Revolving unsecured credit facility
Financial liabilities:
Debt	83,000	107,000	137,000
Carrying Value | Senior unsecured notes, outstanding principal
Financial liabilities:
Debt	300,000	300,000	200,000
Estimated Fair Value
Financial assets:
Cash and cash equivalents	110,408	114,423	73,148
Fees and service charges receivable	40,022	42,736	38,021
Total assets	490,502	525,429	447,883
Financial liabilities:
Total liabilities	388,000	421,000	345,000
Estimated Fair Value | Pawn loans
Financial assets:
Loans receivable	322,625	344,748	314,505
Estimated Fair Value | Consumer loans, net
Financial assets:
Loans receivable	17,447	23,522	22,209
Estimated Fair Value | Revolving unsecured credit facility
Financial liabilities:
Debt	83,000	107,000	137,000
Estimated Fair Value | Senior unsecured notes, outstanding principal
Financial liabilities:
Debt	305,000	314,000	208,000
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	110,408	114,423	73,148
Fees and service charges receivable	0	0	0
Total assets	110,408	114,423	73,148
Financial liabilities:
Total liabilities	0	0	0
Estimated Fair Value | Level 1 | Pawn loans
Financial assets:
Loans receivable	0	0	0
Estimated Fair Value | Level 1 | Consumer loans, net
Financial assets:
Loans receivable	0	0	0
Estimated Fair Value | Level 1 | Revolving unsecured credit facility
Financial liabilities:
Debt	0	0	0
Estimated Fair Value | Level 1 | Senior unsecured notes, outstanding principal
Financial liabilities:
Debt	0	0	0
Estimated Fair Value | Level 2
Financial assets:
Cash and cash equivalents	0	0	0
Fees and service charges receivable	0	0	0
Total assets	0	0	0
Financial liabilities:
Total liabilities	388,000	421,000	345,000
Estimated Fair Value | Level 2 | Pawn loans
Financial assets:
Loans receivable	0	0	0
Estimated Fair Value | Level 2 | Consumer loans, net
Financial assets:
Loans receivable	0	0	0
Estimated Fair Value | Level 2 | Revolving unsecured credit facility
Financial liabilities:
Debt	83,000	107,000	137,000
Estimated Fair Value | Level 2 | Senior unsecured notes, outstanding principal
Financial liabilities:
Debt	305,000	314,000	208,000
Estimated Fair Value | Level 3
Financial assets:
Cash and cash equivalents	0	0	0
Fees and service charges receivable	40,022	42,736	38,021
Total assets	380,094	411,006	374,735
Financial liabilities:
Total liabilities	0	0	0
Estimated Fair Value | Level 3 | Pawn loans
Financial assets:
Loans receivable	322,625	344,748	314,505
Estimated Fair Value | Level 3 | Consumer loans, net
Financial assets:
Loans receivable	17,447	23,522	22,209
Estimated Fair Value | Level 3 | Revolving unsecured credit facility
Financial liabilities:
Debt	0	0	0
Estimated Fair Value | Level 3 | Senior unsecured notes, outstanding principal
Financial liabilities:
Debt	$ 0	$ 0	$ 0