Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income (loss):	$ 3,602us-gaap_NetIncomeLoss	$ 2,676us-gaap_NetIncomeLoss	$ (8,042)us-gaap_NetIncomeLoss
Available-for-sale securities:
Changes in unrealized gains/losses	157	(304)	2,621
Reclassification adjustments for gains included in net income (loss)	(61)	(1,009)	(670)
Net change	96	(1,313)	1,951
Cash flow hedges:
Changes in unrealized gains/losses	(1,180)	372	635
Reclassification adjustments for (gains) losses included in net income (loss)	562	(856)	325
Net change	(618)	(484)	960
Change in unrealized components of defined benefit plans:
Losses arising during the period	(209)	(11)	(161)
Amortization of actuarial loss and prior service benefit	11	11	2
Net change	(198)		(159)
Foreign currency translation adjustments, net	(25)	(12)	(8)
Other comprehensive income (loss)	(745)	(1,809)	2,744
Comprehensive income (loss)	$ 2,857us-gaap_ComprehensiveIncomeNetOfTax	$ 867us-gaap_ComprehensiveIncomeNetOfTax	$ (5,298)us-gaap_ComprehensiveIncomeNetOfTax

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