Condensed Consolidated Statements of Comprehensive Income Loss (Unaudited) (Parenthetical) (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 Comprehensive Income [Abstract]
Tax benefit (provision) for amortization of deferred loss	$ 0	$ 7	$ 0	$ 21
Tax benefit (provision) for amortization of prior service cost	$ 7	$ 1	$ 21	$ 7