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Summary of Significant Accounting Policies - Impact of ASC 326 (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	$ 7,840,873		$ 7,545,748
Allowance for credit losses on loans	(96,336)	$ (84,272)	(73,658)	$ (69,943)	$ (69,944)
Liabilities: Reserve for Unfunded Commitments	(6,230)	(4,118)
C & I Owner Occupied
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	114,138	89,490
Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	1,773,478	1,545,906	1,545,906
Allowance for credit losses on loans	(27,346)		(18,832)	(17,195)	(15,857)
Income Producing - Commercial Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	3,827,024	3,702,747	3,702,747
Allowance for credit losses on loans	(43,551)		(29,265)	(26,765)	(28,034)
Owner Occupied - Commercial Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	971,634	985,409	985,409
Allowance for credit losses on loans	(9,867)		(5,838)	(5,980)	(6,242)
Real Estate Mortgage Residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	104,558	104,221	104,221
Allowance for credit losses on loans	(1,369)		(1,557)	(681)	(965)
Construction - Commercial and Residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	969,166	1,035,754	1,125,244
Allowance for credit losses on loans	(13,341)		(17,485)	(18,469)	(18,175)
Construction - Commercial and Residential \| C & I Owner Occupied
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	114,138		89,490
Home Equity
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	78,228	80,061	80,061
Allowance for credit losses on loans	(818)		(656)	(605)	(599)
Other Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	2,647	2,160	2,160
Allowance for credit losses on loans	(44)		$ (25)	$ (248)	$ (72)
Pre-ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		(73,658)
Pre-ASC 326 Adoption \| C & I Owner Occupied
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		89,490
Pre-ASC 326 Adoption \| Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		1,545,906
Pre-ASC 326 Adoption \| Income Producing - Commercial Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		3,702,747
Pre-ASC 326 Adoption \| Owner Occupied - Commercial Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		985,409
Pre-ASC 326 Adoption \| Real Estate Mortgage Residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		104,221
Pre-ASC 326 Adoption \| Construction - Commercial and Residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		1,035,754
Pre-ASC 326 Adoption \| Home Equity
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		80,061
Pre-ASC 326 Adoption \| Other Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans		2,160
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on loans		(10,614)
Liabilities: Reserve for Unfunded Commitments		(4,118)
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)