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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

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-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

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-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

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-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

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Amount of the difference between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Income Taxes - Effective Income Tax Rate Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Computed federal income tax expense at statutory rate of 35%									$ 11,050	$ 6,943	$ 9,667
State income taxes									438	397	436
Tax credits									(888)	(1,385)	(779)
Production activity deduction									0	0	(388)
Foreign tax rate differential									(1,958)	(2,374)	(1,419)
Uncertain tax positions									(76)	(520)	(42)
Deferred compensation insurance assets									(81)	(358)	(155)
Other — including the effect of graduated rates									113	566	588
Total income tax expense	$ 3,680us-gaap_IncomeTaxExpenseBenefit	$ 2,489us-gaap_IncomeTaxExpenseBenefit	$ 1,366us-gaap_IncomeTaxExpenseBenefit	$ 1,063us-gaap_IncomeTaxExpenseBenefit	$ 1,642us-gaap_IncomeTaxExpenseBenefit	$ 833us-gaap_IncomeTaxExpenseBenefit	$ 1,253us-gaap_IncomeTaxExpenseBenefit	$ (459)us-gaap_IncomeTaxExpenseBenefit	$ 8,598us-gaap_IncomeTaxExpenseBenefit	$ 3,269us-gaap_IncomeTaxExpenseBenefit	$ 7,908us-gaap_IncomeTaxExpenseBenefit