Income Taxes, Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets [Abstract]
Allowance for Credit Losses		$ 14,962	$ 20,260
Accrued Liabilities		7,421	9,807
Deferred Compensation		8,996	14,166
State Franchise Tax		850	1,680
Acquired Net Operating Loss		756	1,135
Fair Value Adjustment on Loans Acquired		242	429
Fair Value Adjustment on ORE Acquired		108	299
Unrealized Loss on Securities Available-for-Sale		373	58
Low-Income Housing Investment		470	366
Other		17	233
Total Deferred Tax Assets		34,195	48,433
Deferred Tax Liabilities [Abstract]
Premises and Equipment		(1,361)	(1,707)
Securities Accretion		(164)	(341)
Leasing Activities		(12,389)	(14,868)
Core Deposit Intangible Asset		(247)	(398)
Prepaid		(964)	(314)
Other		(944)	(494)
Total Deferred Tax Liabilities		(16,069)	(18,122)
Net Deferred Tax Assets		$ 18,126	$ 30,311
Income Tax Disclosure [Line Items]
Tax Provision at Federal Statutory Rate		35.00%	35.00%	35.00%
Plan [Member]
Income Tax Disclosure [Line Items]
Tax Provision at Federal Statutory Rate	21.00%