CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) [Abstract]
Net earnings available to common stockholders	$ 5,568us-gaap_NetIncomeLoss	$ 2,503us-gaap_NetIncomeLoss
Other comprehensive (loss) income:
Currency translation adjustment, net of taxes of ($160) in 2015 and $34 in 2014	(10,364)	169
Unrealized holding gains on marketable securities arising during the period, net of taxes of $33 in 2015 and $17 and 2014	54	28
Change in unfunded SERP liability, net of taxes of $28 in 2015 and $14 in 2014	64	32
Other comprehensive (loss) income	(10,246)	229
Comprehensive (loss) income	$ (4,678)us-gaap_ComprehensiveIncomeNetOfTax	$ 2,732us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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