Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net Income	$ 36,984	$ 104,178	$ 101,765	$ 148,995
Other Comprehensive Income:
Net unrealized gain on investments, net of taxes	195	0	252	0
Realized gain on investments	0	0	(38)	0
Net unrealized gain on derivatives	15	9,135	52	7,028
Amortization of loss on derivatives	403	666	876	1,322
Retirement liability adjustment	96	364	148	729
Total	709	10,165	1,290	9,079
Comprehensive Income	37,693	114,343	103,055	158,074
Comprehensive Income Attributable to Noncontrolling Interests	(1,588)	(37,742)	(3,066)	(39,209)
Comprehensive Income Adjusted for Noncontrolling Interests	$ 36,105	$ 76,601	$ 99,989	$ 118,865