Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net Loss	$ (203,116)	$ (15,420)
Pension and postretirement plans:
Amortization of prior service cost, net of tax of ($47) and $0, respectively	(78)	0
Amortization of net loss, including settlement charges, net of tax of $1,168 and $996, respectively	1,890	1,851
Current period change in fair value of pension and postretirement plans, net of tax of ($6) and $0, respectively	(9)	0
Total pension and postretirement plans	1,803	1,851
Comprehensive Loss	$ (201,313)	$ (13,569)