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Debt and Credit Arrangements Senior Credit Facility (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Debt Instrument [Line Items] |  |  |  |
Debt Issuance Cost |  |  | $ 1,445,000 |
Financing costs amortization | 327,000 | 327,000 | 653,000 | 653,000
Fronting Fee Percentage Charged For Issuance Of Letters Of Credit | 0.125% |  | 0.125% |
Line Of Credit Facility Initial Percentage Of Term Loan Payable Quarterly Due To Restated Credit Facility | 5.00% |  | 5.00% |
Line Of Credit Facility Final Percentage Of Term Loan Payable Quarterly Due To Restated Credit Facility | 10.00% |  | 10.00% |
Final Duration Of Quarterly Payments On Term Loan Under The Terms Of The Restated Credit Facility |  |  | 2 years |
Senior Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Term of Senior Credit Facility |  |  | 5 years |
Line of Credit Facility, Maximum Borrowing Capacity | 375,000,000 |  | 375,000,000 |
Line Of Credit Facility, Amount Of Expansion Option To Increase The Aggregate Principal Amount Of The Term Loan Or Revolving Credity Facility | 150,000,000 |  | 150,000,000 |
Line of Credit Facility, Interest Rate Description |  |  | Loans under the Senior Credit Facility bear interest, at the applicable Borrower's election, at either LIBOR or the greatest of (a) the JPMorgan prime rate in effect on such day, (b) the Federal Funds Effective Rate in effect on such day plus 1/2 of 1% or (c) the Adjusted LIBOR Rate (as defined in the Restated Credit Facility) for a one month interest period on such day (or if such day is not a business day, the immediately preceding business day) plus 1%, plus a margin that varies with the Company's leverage ratio. |
Initial Duration Of Quarterly Payments On Term Loan Under The Terms Of The Restated Credit Facility |  |  | 3 years |
Line of Credit Facility, Covenant Terms |  |  | Significant financial covenants for the Senior Credit Facility include a leverage ratio and an interest ratio. |
Line of Credit Facility, Amount Outstanding | 0 |  | 0 |
Senior Term Loan Due 2017 [Member] | Senior Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 75,000,000 |  | 75,000,000 |
Financing costs amortization | 150,000 | 150,000 | 298,000 | 298,000
Term Loan [Member] | Senior Term Loan Due 2017 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Debt, Gross | 66,563,000 |  | 66,563,000 |
Line of Credit [Member] | Senior Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum Percentage Of Capital Stock Guaranteed By Company's Material Non-U.S. Subsidiaries For Obligations Under The Senior Credit Facility | 65.00% |  | 65.00% |
Revolving Line of Credit [Member] | Amended Revolver [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Letters of Credit Outstanding, Amount | 29,141,000 |  | 29,141,000 |
Line of Credit Facility, Remaining Borrowing Capacity | 270,859,000 |  | 270,859,000 |
Revolving Credit Facility [Member] | Senior Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 300,000,000 |  | 300,000,000 |
Sub-limit For Issuance Of Swingline Loans | 25,000,000 |  | 25,000,000 |
Sub-limit For Letters Of Credit | 100,000,000 |  | 100,000,000 |
Maximum Amount For Foreign Currency Denominated Letters Of Credit And Borrowings | 50,000,000 |  | 50,000,000 |
Maximum Amount Of Permitable Subsidiary Borrowings | $ 50,000,000 |  | $ 50,000,000 |
Minimum [Member] | Revolving Line of Credit [Member] | Revolver [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  | 0.25% |
Line of Credit Facility, Participation Fee Percentage |  |  | 1.50% |
Maximum [Member] | Revolving Line of Credit [Member] | Revolver [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  |  | 0.40% |
Line of Credit Facility, Participation Fee Percentage |  |  | 3.00% |

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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