Accumulated Other Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended						12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Foreign Currency Items	Dec. 31, 2011 Foreign Currency Items	Dec. 31, 2010 Foreign Currency Items	Dec. 31, 2012 Unrealized Gains (Losses) on Securities	Dec. 31, 2011 Unrealized Gains (Losses) on Securities	Dec. 31, 2009 Unrealized Gains (Losses) on Securities	Dec. 31, 2012 Derivative Financial Instruments		Dec. 31, 2011 Derivative Financial Instruments		Dec. 31, 2010 Derivative Financial Instruments		Dec. 31, 2012 Unrecognized pension benefit costs, net of taxes		Dec. 31, 2011 Unrecognized pension benefit costs, net of taxes		Dec. 31, 2010 Unrecognized pension benefit costs, net of taxes		Dec. 31, 2012 Accumulated Other Comprehensive (Loss) Income	Dec. 31, 2011 Accumulated Other Comprehensive (Loss) Income	Dec. 31, 2010 Accumulated Other Comprehensive (Loss) Income
Changes in accumulated balances for each classification of comprehensive (loss) income
Balance at the beginning of the period	$ (2,977)	$ (32,817)	$ (20,693)	$ (8,833)	$ 7,492		$ 73	$ 73	$ 382	[1]	$ (1,480)	[1]	$ (2,415)	[1]	$ (12,506)	[2]	$ (7,287)	[2]	$ (7,734)	[2]	$ (32,817)	$ (17,527)	$ (2,584)
Change during period			30,563	(11,860)	(16,325)	0	(73)		904	[1]	1,480	[1]	935	[1]	(798)	[2]	(4,998)	[2]	57	[2]	30,669	(15,451)	(15,333)
Change in LNS derivative financial instrument									(518)	[1]	382	[1]									(518)	382
Reclassified into operations															(311)	[2]	(221)	[2]	390	[2]	(311)	(221)	390
Balance at the end of the period	(2,977)	(32,817)	9,870	(20,693)	(8,833)			73	768	[1]	382	[1]	(1,480)	[1]	(13,615)	[2]	(12,506)	[2]	(7,287)	[2]	(2,977)	(32,817)	(17,527)
Income taxes amount									$ 470		$ (1,008)		$ (623)		$ 298		$ (1,584)		$ 306

[1] The change during the period is net of income taxes of approximately $470, $(1,008) and $(623) in 2012, 2011 and 2010, respectively. We have recorded $(518) representing our share of the derivative instrument held by LNS.

[2] The change during the period is net of income taxes of approximately $298, $(1,584) and $306 in 2012, 2011 and 2010 respectively.