Basis of Accounting and Consolidation Basis of Accounting and Consolidation (Accounting Standards Updates) (Details) - USD ($)	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 16,542,000		$ 17,006,000
Operating lease liabilities	$ 16,568,000		17,007,000
Off-Balance Sheet, Credit Loss, Liability		$ 69,000	$ 0
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets				$ 14,100,000
Operating lease liabilities				$ 14,100,000
Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets		717,000
Off-Balance Sheet, Credit Loss, Liability		$ 69,000