Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 18,288	$ 28,129	$ 9,035
Other comprehensive income (loss):
Adjustment to pension liability	16,001	(6,176)	(13,793)
Income tax expense (benefit)	6,240	(2,408)	(5,379)
Other comprehensive income (loss)	9,761	(3,768)	(8,414)
Comprehensive income	$ 28,049	$ 24,361	$ 621