CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ 5,340	$ (29,892)
Other comprehensive income (loss):
Amortization of prior service credit	92	154
Actuarial (gain) loss	(497)	1,013
Amortization of actuarial loss	(117)	(70)
Adjustments to net periodic postretirement (benefit) loss	(522)	1,097
Comprehensive income (loss)	$ 5,862	$ (30,989)