Derivative Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2021	Dec. 31, 2019
Securities Sold under Agreements to Repurchase [Abstract]
Gross Amounts Recognized	$ 196,532		$ 230,886
Gross Amounts Offset in the Statement of Financial Position	0		0
Net Amounts of Liabilities presented in the Statement of Financial Position	196,532		230,886
Financial Instruments	0		0
Fair Value Collateral Posted	196,532		230,886
Net Amount	0		0
Fair value of derivatives in a net liability position	46,800
Posted collateral	47,100
Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives (other assets), fair value	35,728		11,055
Liability derivatives (other liabilities), fair value	46,828		14,747
Derivative Asset [Abstract]
Gross Amounts Offset in the Statement of Financial Position	0		0
Derivative financial instruments	35,728		11,055
Financial Instruments	14		56
Fair Value Collateral Posted	0		0
Net Amount	35,714		10,999
Derivative Liability [Abstract]
Gross Amounts Offset in the Statement of Financial Position	0		0
Net Amounts of Liabilities presented in the Statement of Financial Position	46,828		14,747
Financial Instruments	14		56
Fair Value Collateral Posted	46,222		14,573
Net Amount	592		118
Derivatives Designated as Hedging Instruments
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives (other assets), fair value	0		0
Liability derivatives (other liabilities), fair value	10,840		2,872
Derivatives Designated as Hedging Instruments | Other Assets | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	261,962		61,962
Asset derivatives (other assets), fair value	0		0
Derivatives Designated as Hedging Instruments | Other Liabilities | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Liability derivatives (other liabilities), fair value	10,840		2,872
Derivatives not Designated as Hedging Instruments
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset derivatives (other assets), fair value	35,728		11,055
Liability derivatives (other liabilities), fair value	35,988		11,875
Derivatives not Designated as Hedging Instruments | Other Assets | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	1,021,528		749,819
Asset derivatives (other assets), fair value	35,728		11,055
Derivatives not Designated as Hedging Instruments | Other Liabilities | Interest rate swap
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Liability derivatives (other liabilities), fair value	$ 35,988		$ 11,875
Cash Flow Hedging | Subordinated Debt [Member]
Derivative [Line Items]
Derivative, Variable Interest Rate	2.62%
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	$ 62,000
Cash Flow Hedging | Federal Home Loan Bank Overnight Advances [Member]
Derivative [Line Items]
Derivative, fixed rate	1.12%
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	$ 100,000
Cash Flow Hedging | Federal Home Loan Bank 3 Month Advances [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Notional Amount	$ 100,000
Maximum | Cash Flow Hedging | Subordinated Debt [Member]
Derivative [Line Items]
Cash flow hedge term	6 years
Maximum | Cash Flow Hedging | Federal Home Loan Bank Overnight Advances [Member]
Derivative [Line Items]
Cash flow hedge term	3 years
Maximum | Cash Flow Hedging | Federal Home Loan Bank 3 Month Advances [Member]
Derivative [Line Items]
Cash flow hedge term	5 years
Scenario, Forecast | Cash Flow Hedging
Derivative [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income		$ 2,800