Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Operating Lease, Right-of-Use Asset		$ 14,843		$ 15,500
Number of reportable segments | segment		1
Required reserves on deposits maintained		$ 9,700	$ 15,100
Minimum period of consecutive contractual payments to no longer be considered in nonaccrual status		6 months
Finite-lived intangible assets useful life			10 years
Operating Lease, Liability		$ 15,461		$ 16,200
Furniture, Fixtures and Equipment [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		3 years
Furniture, Fixtures and Equipment [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		10 years
Building and Leasehold Improvements [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		10 years
Building and Leasehold Improvements [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		40 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life		3 years
Core Deposits [Member]
Property, Plant and Equipment [Line Items]
Finite-lived intangible assets useful life	10 years	10 years
State and Local Jurisdiction [Member]
Property, Plant and Equipment [Line Items]
Right to receive state tax credit at agreed upon rates		10 years