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