Derivative Instruments and Hedging Activities (Textuals) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2006 USD ($)
Derivative Instruments and Hedging Activities (Textuals)
Fair value of investment hedge contracts	$ 1,221	$ 313
Derivatives used in net investment hedge, increase (decrease), gross of tax	$ 788	4,563
Maximum remaining maturity of foreign currency derivatives	24 months
Fair value of non-designated foreign exchange forward contracts	$ 776	705
Number of interest rate swap contracts	2
Notional amount of pay-fixed receive-variable interest rate swaps			$ 200,000
Fair value of interest rate contracts	$ (1,212)	(2,351)
Gain on interest rate cash flow hedges, pretax	1,093	$ 1,181
Anticipated reclassification from other comprehensive income to interest expense within the next 12 months	906
Interest Rate Swap
Derivative Instruments and Hedging Activities (Textuals)
Notional amount of pay-fixed receive-variable interest rate swaps	$ 50,000

Derivative Instruments and Hedging Activities.

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- Definition

Number of interest rate swap contracts

+ References

No definition available.

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Fair value as of the balance sheet date of all foreign currency derivatives not designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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- Definition

Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments.

+ References

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- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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- Definition

Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Net fair value of all derivatives designated as hedges of net investment in foreign operations.

+ References

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- Definition

Current period adjustment resulting from gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity, gross of tax effect.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

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- Definition

Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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