Finance Receivables, Credit Quality Information, and Allowance for Loan Losses (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Reconciliation of the allowance for loan losses          
Balance at beginning of period $ 19,860 $ 18,000 $ 19,300 $ 18,000  
Provision 5,908 3,489 11,535 7,325  
CHARGE-OFFS (5,210) (3,612) (10,452) (7,616)  
Recoveries 222 123 397 291  
Balance at end of period 20,780 18,000 20,780 18,000  
Finance Receivables 345,411 259,200 345,411 259,200 306,594
Allowance as Percentage of Finance Receivables 6.00% 6.90% 6.00% 6.90%  
Small installment loans [Member]
         
Reconciliation of the allowance for loan losses          
Balance at beginning of period 8,147 6,953 8,838 8,974  
Provision 4,296 2,603 6,746 2,924  
CHARGE-OFFS (2,983) (2,361) (6,246) (4,826)  
Recoveries 91 86 213 209  
Balance at end of period 9,551 7,281 9,551 7,281  
Finance Receivables 121,300 105,441 121,300 105,441 130,257
Allowance as Percentage of Finance Receivables 7.90% 6.90% 7.90% 6.90%  
Large installment loans [Member]
         
Reconciliation of the allowance for loan losses          
Balance at beginning of period 3,490 2,478 2,448 2,972  
Provision 519 541 2,009 607  
CHARGE-OFFS (812) (418) (1,285) (997)  
Recoveries 96 14 121 33  
Balance at end of period 3,293 2,615 3,293 2,615  
Finance Receivables 57,053 34,186 57,053 34,186 36,938
Allowance as Percentage of Finance Receivables 5.80% 7.60% 5.80% 7.60%  
Automobile purchase loans [Member]
         
Reconciliation of the allowance for loan losses          
Balance at beginning of period 7,756 8,399 7,618 5,909  
Provision 985 177 2,532 3,566  
CHARGE-OFFS (1,325) (798) (2,761) (1,723)  
Recoveries 35 22 62 48  
Balance at end of period 7,451 7,800 7,451 7,800  
Finance Receivables 146,478 114,739 146,478 114,739 128,660
Allowance as Percentage of Finance Receivables 5.10% 6.80% 5.10% 6.80%  
Furniture and appliance purchase loans [Member]
         
Reconciliation of the allowance for loan losses          
Balance at beginning of period 467 170 396 145  
Provision 108 168 248 228  
CHARGE-OFFS (90) (35) (160) (70)  
Recoveries    1 1 1  
Balance at end of period 485 304 485 304  
Finance Receivables $ 20,580 $ 4,834 $ 20,580 $ 4,834 $ 10,739
Allowance as Percentage of Finance Receivables 2.40% 6.30% 2.40% 6.30%