Derivatives - Schedule of Effect of Derivative Financial Instruments on Consolidated Statement of Operations (Details) - Interest Rate Swap [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Swap agreements gain (loss) recognized in OCI	$ 6,388	$ (17,669)
Swap agreements gain (loss) reclassified from OCI - Interest expense	$ (18,800)	$ (12,487)	$ (8,780)