STATEMENTS OF COMPREHENSIVE INCOME 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
Net income	$ 9,454	$ 14,951	$ 68,530	$ 68,443
Other comprehensive income (loss), net of tax
Change in pension and postretirement benefit plan liability, net of tax of $(2,075), $0, $49 and $0, respectively	3,315	0	(78)	0
Other comprehensive income (loss), net of tax	3,315	0	(78)	0
Comprehensive income	$ 12,769	$ 14,951	$ 68,452	$ 68,443