Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - New Accounting Standards (Illustration of the Impact of ASC 326) (Details)

v3.20.4
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - New Accounting Standards (Illustration of the Impact of ASC 326) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Item Effected [Line Items]          
Allowance for credit losses on loans $ 160,540 $ 89,778 $ 42,294 $ 41,045 $ 38,208
Total Allowance for credit losses 160,540 94,838 42,294    
Previous Accounting Guidance          
Item Effected [Line Items]          
Allowance for credit losses on loans     42,294    
Total Allowance for credit losses     43,194    
Accounting Standards Update 2016-13 | Restatement Adjustment          
Item Effected [Line Items]          
Allowance for credit losses on loans   47,484      
Total Allowance for credit losses   51,644      
Commercial Portfolio          
Item Effected [Line Items]          
Allowance for credit losses on loans 117,403 37,125 30,941    
Commercial Portfolio | Previous Accounting Guidance          
Item Effected [Line Items]          
Allowance for credit losses on loans     30,941    
Commercial Portfolio | Accounting Standards Update 2016-13 | Restatement Adjustment          
Item Effected [Line Items]          
Allowance for credit losses on loans   6,184      
Consumer Portfolio          
Item Effected [Line Items]          
Allowance for credit losses on loans $ 43,137 52,653 11,353    
Consumer Portfolio | Previous Accounting Guidance          
Item Effected [Line Items]          
Allowance for credit losses on loans     11,353    
Consumer Portfolio | Accounting Standards Update 2016-13 | Restatement Adjustment          
Item Effected [Line Items]          
Allowance for credit losses on loans   41,300      
Unfunded Commitments          
Item Effected [Line Items]          
Total Allowance for credit losses   5,060      
Unfunded Commitments | Previous Accounting Guidance          
Item Effected [Line Items]          
Total Allowance for credit losses     $ 900    
Unfunded Commitments | Accounting Standards Update 2016-13 | Restatement Adjustment          
Item Effected [Line Items]          
Total Allowance for credit losses   $ 4,160