Segment Information (Reconciliation of Interest Expense from Segments to Consolidated) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Interest expense	$ 137,623	$ 142,863	$ 96,700
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Interest expense	$ 137,623	$ 142,863	$ 96,700