Accounting Policies (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 59,312,000	$ 82,253,000	$ 178,917,000	$ 246,832,000
Discontinued operations	0	706,000	1,844,000	(1,674,000)
Equity in earnings	(19,346,000)	(43,924,000)	(80,543,000)	(56,680,000)
Income tax benefit	(365,000)	144,955,000	(43,381,000)	117,820,000
Loss reclassified from accumulated OCI			(3,453,000)	(3,590,000)
Accumulated net gain (loss) from designated or qualifying cash flow hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss reclassified from accumulated OCI			(3,453,000)	(3,590,000)
Reclassification out of accumulated OCI [Member] | Accumulated net gain (loss) from designated or qualifying cash flow hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense			1,956,000	5,788,000
Discontinued operations			3,666,000
Equity in earnings			44,000	88,000
Total before income tax and noncontrolling interest			5,666,000	5,876,000
Income tax benefit			(2,187,000)	(2,274,000)
Noncontrolling interest			(26,000)	(12,000)
Loss reclassified from accumulated OCI			$ 3,453,000	$ 3,590,000