Fair Value - Carrying Amount and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Total Securities Available For Sale	$ 613,461	$ 584,908
Carrying Amount
ASSETS
Cash and cash equivalents	653,243	532,694
Total Securities Available For Sale	613,461	584,908
Total Trading Securities	6,877	6,649
Loans held for sale	1,897	8,514
Net loans	3,365,429	3,337,449
FHLB and other restricted interests	20,463	21,018
Interest Rate swaps	2,593	4,017
Accrued interest receivable	18,451	17,659
LIABILITIES
Deposits	(4,358,100)	(4,181,744)
Subordinated debentures	(70,620)	(70,620)
Interest rate swaps	(3,255)	(4,785)
Accrued interest payable	(1,217)	(1,096)
Total Fair Value
ASSETS
Cash and cash equivalents	653,243	532,694
Total Securities Available For Sale	613,461	584,908
Total Trading Securities	6,877	6,649
Loans held for sale	1,994	8,617
Net loans	3,372,178	3,339,482
Interest Rate swaps	2,593	4,017
Accrued interest receivable	18,442	17,659
LIABILITIES
Deposits	(4,367,143)	(4,193,200)
Subordinated debentures	(62,723)	(62,583)
Interest rate swaps	(3,255)	(4,785)
Accrued interest payable	(1,217)	(1,096)
Quoted Prices in Active Markets for Identical Assets (Level 1) | Total Fair Value
ASSETS
Cash and cash equivalents	653,243	532,694
Total Securities Available For Sale	8,020	16,018
Total Trading Securities	6,877	6,599
Loans held for sale	0	0
Net loans	0	0
Interest Rate swaps	0	0
Accrued interest receivable	31	61
LIABILITIES
Deposits	(3,899,111)	(3,705,200)
Subordinated debentures	0	0
Interest rate swaps	0	0
Accrued interest payable	0	0
Significant Other Observable Inputs (Level 2) | Total Fair Value
ASSETS
Cash and cash equivalents	0	0
Total Securities Available For Sale	603,191	568,826
Total Trading Securities	0	50
Loans held for sale	1,994	8,617
Net loans	0	0
Interest Rate swaps	2,593	4,017
Accrued interest receivable	2,296	2,152
LIABILITIES
Deposits	(468,032)	(488,000)
Subordinated debentures	(62,723)	(62,583)
Interest rate swaps	(3,255)	(4,785)
Accrued interest payable	(1,217)	(1,096)
Significant Unobservable Inputs (Level 3) | Total Fair Value
ASSETS
Cash and cash equivalents	0	0
Total Securities Available For Sale	2,250	64
Total Trading Securities	0	0
Loans held for sale	0	0
Net loans	3,372,178	3,339,482
Interest Rate swaps	0	0
Accrued interest receivable	16,116	15,446
LIABILITIES
Deposits	0	0
Subordinated debentures	0	0
Interest rate swaps	0	0
Accrued interest payable	$ 0	$ 0