Summary of Significant Accounting Policies (Details) $ in Thousands			6 Months Ended
	Apr. 01, 2020 USD ($)	Jan. 01, 2020 USD ($)	Jun. 30, 2020 USD ($) segment	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of operating segments | segment			1
Operating lease, right-of-use asset			$ 3,000		$ 3,200
Estimated allowance for credit losses (ACL)			$ 37,620	$ 38,340	$ 33,760	$ 35,650	$ 36,520		$ 37,810
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional operating liabilities								$ 3,580
Operating lease, right-of-use asset								$ 3,580
Cumulative Effective, Period Of Adoption, Estimated Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated overall increase in Allowance for Credit Losses (ACL) for loans		$ 3,500
Anticipated unfunded commitments liability		$ 1,450
Cumulative Effective, Period Of Adoption, Estimated Adjustment [Member] | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated overall increase in Allowance for Credit Losses (ACL) for loans	$ 41,000
Cumulative Effective, Period Of Adoption, Estimated Adjustment [Member] | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated overall increase in Allowance for Credit Losses (ACL) for loans	44,000
Cumulative Effective, Period Of Adoption, Estimated Finalized Adjustment [Member] | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Anticipated unfunded commitments liability	4,000
Cumulative Effective, Period Of Adoption, Estimated Finalized Adjustment [Member] | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Anticipated unfunded commitments liability	$ 5,000