Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Amortization of right - of-use assets	$ (18)	$ (18)
Interest on lease liabilities	26	26
Operating lease cost	974	822
Total lease expense	1,351	1,149
Operating cash flow used for operating leases	590	450
Financing cash flow used for finance leases	8	8
Right of use asset obtained (land) in exchange for new finance lease liabilities	4,099
Capital Leased Assets, Gross			$ 4,081
Right of use asset obtained in exchange for new operating lease liabilities	25,442		23,751
Right of use asset obtained relative to below market operating leases	$ 28,178
Amortization of above and below Market Leases			28,366
Weighted - average remaining lease term - finance leases (in years)	4 years 3 months
Weighted - average remaining lease term - operating leases (in years)	25 years 7 months 6 days
Weighted - average discount rate - finance leases (annual)	2.50%
Weighted - average discount rate - operating leases (annual)	4.14%
Present Value of Lease Liabilities	$ 4,099			$ 4,100
Capital Lease Obligations			4,081
Present Value of Lease Liabilities	26,083		$ 24,222
Operating And Finance Lease, Payments	598	458
Below Market Leases
Lessee, Lease, Description [Line Items]
Variable lease expense	$ 369	$ 319