Debt (Principal Payments Of Debt) (Details) (USD $)				3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013	Mar. 31, 2014 8.1% Senior Unsecured Notes [Member]
Maturities of Long-term Debt [Line Items]
2014 remaining	$ 48,650,000
2015	239,941,000
2016	249,441,000
2017	142,032,000
2018	60,277,000
2019	153,907,000	[1]
2020	35,363,000
2021	2,278,000
2022	304,815,000
2023	301,937,000
Thereafter	296,327,000
Total	1,834,968,000
Unsecured notes payable under credit facilities	159,900,000		0
Obligations under capital leases	21,000,000		21,000,000
Fair value of interest rate contracts	4,900,000
Net premium/(discount) on debt	(3,300,000)
Non-cash debt	4,900,000
Debt service guaranty liability	73,740,000		73,740,000
Senior unsecured notes				$ 100,000,000
Debt stated interest rate				8.10%
Debt maturity date				Sep. 15, 2019
Debt redemption date option				9/15/2014

[1] Includes $100 million of our 8.1% senior unsecured notes due 2019 which may be redeemed by us at any time on or after September 2014 at our option.