Derivative Financial Instruments and Hedging Activities Reclassified Gain (Loss) on Derivatives Table (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 06, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Derivatives		$ (13,000)	$ 6,800	$ 1,700
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		100	400	$ 0
Derivative, Cash Paid on Hedge	$ 20,400	$ 20,430	$ (15,905)
Document Period End Date		Dec. 31, 2019
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount		$ 300,000