Fair Value of Financial Instruments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Financial Assets at Fair Value Option	$ 14,300	$ 13,800
Financial Liabilities at Fair Value Option	44,400	41,800
Proceeds from Sale of Long-term Investments	200
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(5,353)	(4,122)	$ (3,465)
Financial Liabilities at Fair Value Option Contractual Principal	61,900	61,900
Financial Liabilities at Fair Value Option Accrued Interest Payable	$ 200	200
Appraised Value of Property [Member]
Collateral Dependent Loans Measurement Input	0.85
Fair Value, Measurements, Nonrecurring [Member]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0	0
Interest Rate Swaps [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ (3,000)	$ 900	$ (600)