Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net Income	$ 102,199	$ 62,389	$ 203,964	$ 211,384
Other Comprehensive Income:
Net unrealized (loss) gain on investments, net of taxes	(49)	(34)	203	(34)
Realized gain on investments	0	0	(38)	0
Net unrealized gain (loss) on derivatives	83	(293)	135	6,735
Amortization of loss on derivatives	404	480	1,280	1,802
Retirement liability adjustment	96	364	244	1,093
Total	534	517	1,824	9,596
Comprehensive Income	102,733	62,906	205,788	220,980
Comprehensive Income Attributable to Noncontrolling Interests	(1,870)	(1,847)	(4,936)	(41,056)
Comprehensive Income Adjusted for Noncontrolling Interests	$ 100,863	$ 61,059	$ 200,852	$ 179,924