Loans and Allowance for Loan Losses - Loan Modification Due to COVID-19 (Details) - COVID-19 Loan Modification $ in Thousands	Jun. 30, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	$ 484,036
Payment Deferment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	469,304
Interest Only Payment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	14,732
Real Estate | Commercial property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	379,566
Real Estate | Commercial property | Payment Deferment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	369,716
Real Estate | Commercial property | Interest Only Payment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	9,850
Real Estate | Residential property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	44,804
Real Estate | Residential property | Payment Deferment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	44,804
Real Estate | Residential property | Interest Only Payment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	0
Commercial and Industrial | Commercial term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	58,159
Commercial and Industrial | Commercial term | Payment Deferment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	53,277
Commercial and Industrial | Commercial term | Interest Only Payment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	4,882
Other Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	1,507
Other Consumer | Payment Deferment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	1,507
Other Consumer | Interest Only Payment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Aggregate carrying amount of loans modified due to COVID-19	$ 0