Loans - Summary of Amortized Cost Basis of Collateral-dependent Loans by Class of Loans and Collateral Type (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 5,277,033	$ 5,409,161
Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	24,417	36,449
Equipment and Machinery [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	164	5,317
Inventory and Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,432	4,943
Vehicles [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	314	125
Collateral Pledged [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	30,327	46,834
Real Estate Loans [Member] | Real Estate [Member] | Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,061	1,024
Real Estate Loans [Member] | Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	21,444	33,999
Real Estate Loans [Member] | Collateral Pledged [Member] | Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,061	1,024
Real Estate Loans [Member] | Collateral Pledged [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	21,444	33,999
Other Loans [Member] | Real Estate [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,912	1,426
Other Loans [Member] | Equipment and Machinery [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	164	5,317
Other Loans [Member] | Inventory and Receivables [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	5,432	4,943
Other Loans [Member] | Vehicles [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	314	125
Other Loans [Member] | Collateral Pledged [Member] | Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 7,822	$ 11,811