CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement Of Income and Comprehensive Income [Abstract]
Net (loss) income	$ (3,301)	$ 358	$ (2,999)	$ 1,039
Other comprehensive income:
Retirement benefits adjustment
Total comprehensive income	$ (3,301)	$ 358	$ (2,999)	$ 1,039