Fair Value Measurement (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on derivative instrument	$ 510	$ 26,725	$ 556	$ 38,510
Other Contract | Miscellaneous, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on derivative instrument	$ 0	27,175	$ 0	39,464
Other Contract | RLJE | Miscellaneous, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on derivative instrument		$ 20,600		$ 30,200