Accumulated Other Comprehensive Income (Loss) - Changes in Components (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss)
Balance	$ 405,473	$ 416,505	$ 351,297
Net current period other comprehensive (loss)	(14,120)	(26,370)	15,387
Balance	393,991	405,473	416,505
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Balance	(27,510)	(1,140)	(16,527)
Other comprehensive income (loss) before reclassifications	(15,658)	(26,730)	14,329
Amounts reclassified from other comprehensive income (loss)	1,538	360	1,058
Net current period other comprehensive (loss)	(14,120)	(26,370)	15,387
Balance	(41,630)	(27,510)	(1,140)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss)
Balance	1,943	16,793	17,098
Other comprehensive income (loss) before reclassifications	(13,013)	(14,850)	727
Amounts reclassified from other comprehensive income (loss)			(1,032)
Net current period other comprehensive (loss)	(13,013)	(14,850)	(305)
Balance	(11,070)	1,943	16,793
Defined Benefit Pension Plan Adjustments
Accumulated Other Comprehensive Income (Loss)
Balance	(30,358)	(18,450)	(33,718)
Other comprehensive income (loss) before reclassifications	(2,446)	(12,669)	12,913
Amounts reclassified from other comprehensive income (loss)	2,330	761	2,355
Net current period other comprehensive (loss)	(116)	(11,908)	15,268
Balance	(30,474)	(30,358)	(18,450)
Derivatives
Accumulated Other Comprehensive Income (Loss)
Balance	905	517	93
Other comprehensive income (loss) before reclassifications	(199)	789	689
Amounts reclassified from other comprehensive income (loss)	(792)	(401)	(265)
Net current period other comprehensive (loss)	(991)	388	424
Balance	$ (86)	$ 905	$ 517

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
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-URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581

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

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

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

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