XML 84 R54.htm IDEA: XBRL DOCUMENT v3.6.0.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2014
USD ($)
Dec. 31, 2016
segment
acquisition
Dec. 31, 2015
USD ($)
acquisition
Dec. 31, 2011
acquisition
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Number of days until which automobile loans accrue, after which they are charged off   120 days    
Minimum number of days past due for loans excluding automobile loans on which interest is generally not accrued   90 days    
Minimum period of past due that the company can reasonably estimate future cash flows of acquired loans   90 days    
Threshold of loan-to-value ratio to originate a loan (as a percent)   80.00%    
Threshold of loan-to-value ratio for private mortgage insurance (as a percent)   80.00%    
Threshold percentage of amortization of net actuarial gain or loss in net periodic benefit cost over the average remaining service period of active participants in the Plans   10.00%    
Number of reportable segments (segment)   1    
Number of operating segments (segment)   1    
Number of acquisitions completed (acquisition) | acquisition   3 2 2
Revision In Interest Income With Income Tax Related Component [Member]        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Correction of an error, in prior period | $ $ (1.4)   $ 0.0