CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net Income	$ 42,901	$ 12,550
Other Comprehensive (Loss)/Income, net of tax:
Net change in unrealized losses on cash flow hedges	(3,576)	(1,778)
Defined benefit pension and other postretirement benefit plans:
Net change in unrecognized prior service costs	(10)	5
Net change in unrecognized actuarial losses	506	(109)
Other Comprehensive Loss, net of tax:	(3,080)	(1,882)
Comprehensive Income	$ 39,821	$ 10,668