Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Summary of the balances of related after-tax components of accumulated other comprehensive income (loss)
Beginning Balance	$ (387)
Currency translation	(802)		279	(285)
Ending Balance	(1,494)		(387)
Accumulated Short- term Investment Transactions [Member]
Summary of the balances of related after-tax components of accumulated other comprehensive income (loss)
Beginning Balance	1,213		0
Unrealized gain on Available for Sale Securities, net of tax effect			1,213
Reclassifications related to available for sale securities, net of tax effect	(1,213)	[1]
Ending Balance	0		1,213
Accumulated Currency Translation [Member]
Summary of the balances of related after-tax components of accumulated other comprehensive income (loss)
Beginning Balance	1,562		1,283	1,568
Currency translation	(802)		279	(285)
Ending Balance	760		1,562	1,283
Accumulated Postretirement Transactions [Member]
Summary of the balances of related after-tax components of accumulated other comprehensive income (loss)
Beginning Balance	(3,162)		(2,481)	(161)
Minimum pension liability re-valuation, net of tax effect	2,877		(375)	(2,014)
Amortization of net actuarial gain, net of tax effect	(1,969)		(306)	(306)
Ending Balance	(2,254)		(3,162)	(2,481)
Accumulated Other Comprehensive Income [Member]
Summary of the balances of related after-tax components of accumulated other comprehensive income (loss)
Beginning Balance	(387)		(1,198)	1,407
Currency translation	(802)		279	(285)
Minimum pension liability re-valuation, net of tax effect	2,877		(375)	(2,014)
Amortization of net actuarial gain, net of tax effect	(1,969)		(306)	(306)
Unrealized gain on Available for Sale Securities, net of tax effect			1,213
Reclassifications related to available for sale securities, net of tax effect	(1,213)	[1]
Ending Balance	$ (1,494)		$ (387)	$ (1,198)

[1] This accumulated other comprehensive income component relates to realized gains on available for sale securities sold. See Note 3 for further details and pre-tax amounts.