Leases (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating Lease, Right-of-Use Asset		$ 13,714,000	$ 0
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset		13,714,000	0
Operating Lease, Liability		$ 14,482,000	0
Deferred Rent Credit			600,000
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets				$ (995,000)
Operating Lease, Weighted Average Remaining Lease Term		7 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent		3.10%
Lessee, Operating Lease, Liability, Payments, Due		$ 16,202,000
Subsequent Event [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Due	$ 6,500,000
Retained Earnings
Lessee, Lease, Description [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			(143,000)
Accounting Standards Update 2016-02 [Member] | Retained Earnings
Lessee, Lease, Description [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets			143,000
Other Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Liability		14,482,000	11,800,000
Other Assets [Member]
Leases [Abstract]
Operating Lease, Right-of-Use Asset		13,700,000	11,000,000.0
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset		$ 13,700,000	$ 11,000,000.0