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Summary of Significant Accounting Policies - Impact of ASC 326 (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	$ 8,021,761			$ 7,545,748
Allowance for credit losses on loans	(108,796)	$ (96,336)		(73,658)	$ (72,086)	$ (69,943)	$ (69,944)
Liabilities: Reserve for Unfunded Commitments	(7,170)
C & I Owner Occupied
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	149,845
Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	1,607,056			1,545,906
Allowance for credit losses on loans	(28,078)	(27,346)		(15,857)	(18,136)	(17,195)	(15,857)
Income producing - commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	3,678,946			3,702,747
Allowance for credit losses on loans	(51,863)	(43,551)		(28,034)	(27,010)	(26,765)	(28,034)
Owner occupied - Commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	964,077			985,409
Allowance for credit losses on loans	(12,341)	(9,867)		(6,242)	(5,756)	(5,980)	(6,242)
Real estate mortgage residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	93,601			104,221
Allowance for credit losses on loans	(1,550)	(1,369)		(965)	(1,355)	(681)	(965)
Construction - commercial and residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	995,550			1,125,244
Allowance for credit losses on loans	(13,808)	(13,341)		(18,175)	(19,006)	(18,469)	(18,175)
Construction - commercial and residential \| C & I Owner Occupied
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	149,845			89,490
Home equity
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	74,921			80,061
Allowance for credit losses on loans	(1,112)	(818)		(599)	(581)	(605)	(599)
Other consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	1,289			2,160
Allowance for credit losses on loans	(44)	$ (44)		$ (72)	$ (242)	$ (248)	$ (72)
ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liabilities: Reserve for Unfunded Commitments	$ (4,100)
ASU 2016-13 \| Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liabilities: Reserve for Unfunded Commitments			$ (4,100)