Accumulated Other Comprehensive (Loss) Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Accumulated other comprehensive loss [Abstract]
Foreign currency translation adjustment	$ (9,365)		$ 1,904		$ 927
Unrealized holding gain on available-for-sale securities, net of taxes of $259, $169 and $161 as of December 31, 2014, 2013 and 2012	429		282		256
Unfunded SERP liability, net of taxes of ($1,325), $(693) and ($1,151) as of December 31, 2014, 2013 and 2012	(3,026)		(1,541)		(2,610)
Accumulated other comprehensive (loss) income	(11,962)		645
Accumulated other comprehensive loss, tax [Abstract]
Unrealized holding gains (losses) on available-for-sale securities, tax	259		169		161
Change in unfunded SERP liability, tax	(1,325)		(693)		(1,151)
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period	645		(1,427)
Other comprehensive income (loss) before reclassifications	(12,789)		1,825
Amounts reclassified from accumulated other comprehensive income (loss)	182		247
Net current period other comprehensive income (loss)	(12,607)		2,072
Balance at end of period	(11,962)		645
Foreign Currency Translation Adjustment [Member]
Accumulated other comprehensive loss [Abstract]
Accumulated other comprehensive (loss) income	(9,365)		1,904
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period	1,904		927
Other comprehensive income (loss) before reclassifications	(11,269)		977
Amounts reclassified from accumulated other comprehensive income (loss)	0		0
Net current period other comprehensive income (loss)	(11,269)		977
Balance at end of period	(9,365)		1,904
Unrealized Holding Gains on Available-for-Sale Securities [Member]
Accumulated other comprehensive loss [Abstract]
Accumulated other comprehensive (loss) income	429		282
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period	282		256
Other comprehensive income (loss) before reclassifications	147		87
Amounts reclassified from accumulated other comprehensive income (loss)	0		(61)	[1]
Net current period other comprehensive income (loss)	147		26
Balance at end of period	429		282
Unfunded SERP Liability [Member]
Accumulated other comprehensive loss [Abstract]
Accumulated other comprehensive (loss) income	(3,026)		(1,541)
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period	(1,541)		(2,610)
Other comprehensive income (loss) before reclassifications	(1,667)		761
Amounts reclassified from accumulated other comprehensive income (loss)	182	[2]	308	[2]
Net current period other comprehensive income (loss)	(1,485)		1,069
Balance at end of period	$ (3,026)		$ (1,541)

[1] This reclassification relates to the gain on sale of SERP investments during the third quarter of 2013. This is reflected as a gain on sale of investment in the consolidated statements of operations.

[2] This reclassification relates to the amortization of prior service costs and gains/losses associated with the Company's SERP plan. This expense is allocated between cost of sales and selling, general and administrative expense based upon the employment classification of the plan participants.