Debt (Principal Payments Of Debt) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Debt Instrument [Line Items]
2013	$ 349,108,000
2014	473,103,000
2015	274,707,000
2016	223,198,000
2017	140,830,000
2018	63,057,000
2019	152,211,000	[1]
2020	2,099,000
2021	957,000
2022	303,410,000
Thereafter	39,312,000
Total	2,021,992,000
8.1% Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
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 $100.0 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.