CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 19,225	$ (16,383)
Other comprehensive income:
Change in pension and postretirement obligations, net of tax of $13 and $10 in 2014 and 2013	25	19
Total Other Comprehensive Income (Loss), Net of Tax	25	19
Comprehensive income (loss)	$ 19,250	$ (16,364)