Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 1,100	$ 8,099	$ 10,488
Other comprehensive income (loss) -
Unrealized holding gains (losses) arising during period	64	(4)	(24)
Retirement plan gain (loss)	(8,863)	(31,124)	38,459
Income tax credit (provision) on other comprehensive income	3,358	11,897	(14,701)
Other comprehensive income (loss), net of tax	(5,441)	(19,231)	23,734
Comprehensive income (loss)	$ (4,341)	$ (11,132)	$ 34,222