Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 37,786	$ 36,984	$ 87,008	$ 101,765
Other Comprehensive Income:
Net unrealized (loss) gain on investments, net of taxes	(3)	195	76	252
Realized gain on investments	0	0	0	(38)
Realized gain on derivatives	5,007	0	5,007	0
Net unrealized gain on derivatives	1,731	15	381	52
Amortization of loss on derivatives	321	403	709	876
Retirement liability adjustment	360	96	720	148
Total	7,416	709	6,893	1,290
Comprehensive Income	45,202	37,693	93,901	103,055
Comprehensive Income Attributable to Noncontrolling Interests	(1,757)	(1,588)	(3,332)	(3,066)
Comprehensive Income Adjusted for Noncontrolling Interests	$ 43,445	$ 36,105	$ 90,569	$ 99,989