Repurchase Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial Instruments Pledged as Collateral [Abstract]
Debt securities available-for-sale	$ 1,503,165	$ 1,455,429
Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	254,623	271,088
Securities Sold under Agreements to Repurchase [Member] | Asset Pledged as Collateral [Member]
Financial Instruments Pledged as Collateral [Abstract]
Debt securities available-for-sale	330,900	317,100
Overnight and Continuous [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	109,773	111,240
Up to 30 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	0	500
30-90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	25,000	105,000
Greater Than 90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	119,850	54,348
U.S. Treasury and Government Agencies [Member]
Financial Instruments Pledged as Collateral [Abstract]
Debt securities available-for-sale	451,731	295,770
U.S. Treasury and Government Agencies [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	41,679	18,632
U.S. Treasury and Government Agencies [Member] | Overnight and Continuous [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	2,470	3,176
U.S. Treasury and Government Agencies [Member] | Up to 30 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	0	16
U.S. Treasury and Government Agencies [Member] | 30-90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	25,000	5,400
U.S. Treasury and Government Agencies [Member] | Greater Than 90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	14,209	10,040
State and Political Subdivisions [Member]
Financial Instruments Pledged as Collateral [Abstract]
Debt securities available-for-sale	302,662	334,203
State and Political Subdivisions [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	104,120	106,919
State and Political Subdivisions [Member] | Overnight and Continuous [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	82,075	83,375
State and Political Subdivisions [Member] | Up to 30 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	0	484
State and Political Subdivisions [Member] | 30-90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	0	13,633
State and Political Subdivisions [Member] | Greater Than 90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	22,045	9,427
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Financial Instruments Pledged as Collateral [Abstract]
Debt securities available-for-sale	655,213	730,809
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	108,824	145,537
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | Overnight and Continuous [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	25,228	24,689
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | Up to 30 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	0	0
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | 30-90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	0	85,967
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] | Greater Than 90 Days [Member] | Securities Sold under Agreements to Repurchase [Member]
Remaining contractual maturity of securities sold under agreements to repurchase by class of collateral pledged [Abstract]
Repurchase agreements and repurchase-to-maturity transactions	$ 83,596	$ 34,881