Fair Value Of Financial Instruments (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) agreement	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other comprehensive (loss) income - change in value of interest rate swaps	$ (595,000)	$ (2,098,000)	$ 10,971,000
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(4,300,000)	(4,300,000)
Accounts Payable and Accrued Liabilities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	$ 4,110,000	$ 3,515,000
Interest Rate Swap | Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of interest rate swap agreements | agreement	2
Notional Amount	$ 275,000,000.0
Interest Rate Swap | Term Loan | Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable portion of interest rate	1.72%
Other Notes Payable	$ 275,000,000