Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income (loss)	$ (4,181)	$ 4,885
Other comprehensive income (loss):
Foreign currency translation	(4,093)	(2,209)
Unrealized loss on investments, net of tax of $(14) and $0	(26)
Benefit plan amortization, net of tax of $678 and $4,175	1,105	6,824
Other comprehensive income (loss), net of tax	(3,014)	4,615
Comprehensive income (loss)	$ (7,195)	$ 9,500