XML 81 R59.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2018
Jan. 01, 2019
Jan. 01, 2018
Dec. 31, 2017
Change in Accounting Estimate [Line Items]          
Performance obligation, description of timing one year or less        
Mortgage loans secured by residential real estate in process of foreclosure [1]   $ 25,290     $ 43,382
Deposit Bases          
Change in Accounting Estimate [Line Items]          
Intangible assets, amortization period   10 years      
Minimum | Furniture and Fixtures          
Change in Accounting Estimate [Line Items]          
Useful life of premises and equipment   3 years      
Minimum | Building          
Change in Accounting Estimate [Line Items]          
Useful life of premises and equipment   7 years      
Maximum | Furniture and Fixtures          
Change in Accounting Estimate [Line Items]          
Useful life of premises and equipment   15 years      
Maximum | Building          
Change in Accounting Estimate [Line Items]          
Useful life of premises and equipment   45 years      
Non-Accruing | Minimum          
Change in Accounting Estimate [Line Items]          
Impaired commercial loans   $ 1,000      
Government Guaranteed Mortgage Loans upon Foreclosure Receivable          
Change in Accounting Estimate [Line Items]          
Mortgage loans secured by residential real estate in process of foreclosure   2,900      
Non-Interest income          
Change in Accounting Estimate [Line Items]          
Accounts receivable, net   $ 8,100      
Other Assets | Accounting Standards Update 2016-01          
Change in Accounting Estimate [Line Items]          
Adjustment to reflect adoption of accounting standard       $ 265,900  
Available-for-sale Securities | Accounting Standards Update 2016-01          
Change in Accounting Estimate [Line Items]          
Adjustment to reflect adoption of accounting standard       $ (265,900)  
Pro Forma | Accounting Standards Update 2016-02 | Retained Earnings          
Change in Accounting Estimate [Line Items]          
Adjustment to reflect adoption of accounting standard $ 3,000        
Subsequent Event | Accounting Standards Update 2016-02          
Change in Accounting Estimate [Line Items]          
Lease assets     $ 196,000    
Lease liabilities     $ 204,000    
[1] December 31, 2018 and 2017 include $9.7 million and $12.2 million, respectively, of foreclosed residential real estate.