Derivative Financial Instruments and Hedging Activities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Derivatives, Fair Value [Line Items]
Unrealized Gain (Loss) on Derivatives	$ (13,000)	$ 6,800	$ 1,700
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	1,300
Interest Rate Derivative Liabilities, at Fair Value	0	7,400
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	100	400	0
Payments for (Proceeds from) Hedge, Financing Activities			$ 0
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	0	0
Interest Rate Derivative Liabilities, at Fair Value	$ 0	7,400
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Number of Interest Rate Derivatives Held	2
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ 0	$ 7,400