Fair Value Measurements - Schedule Of Assets And Liabilities Measured At Fair Value On Recurring Basis (Details) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
In Thousands, unless otherwise specified |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Total | $9,649 | | $34,798 | |
Certificates of Deposit [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 1,652 | | 1,779 | |
Pre-Refunded Bonds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | ' | | 14,877 | |
Short-Term Bond Mutual Funds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 6,858 | | 17,196 | |
Foreign Exchange Forward Contracts [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 214 | | 121 | |
Liabilities measured at fair value on a recurring basis | -1,141 | | -131 | |
Deferred Compensation Plan Assets [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 925 | [1] | 825 | [1] |
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Total | 7,783 | | 18,021 | |
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Certificates of Deposit [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 0 | | 0 | |
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Pre-Refunded Bonds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | ' | | 0 | |
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Short-Term Bond Mutual Funds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 6,858 | | 17,196 | |
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Foreign Exchange Forward Contracts [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 0 | | 0 | |
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Deferred Compensation Plan Assets [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 925 | | 825 | [1] |
Significant Other Observable Inputs (Level 2) [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Total | 1,866 | | 16,777 | |
Significant Other Observable Inputs (Level 2) [Member] | Certificates of Deposit [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 1,652 | | 1,779 | |
Significant Other Observable Inputs (Level 2) [Member] | Pre-Refunded Bonds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | ' | | 14,877 | |
Significant Other Observable Inputs (Level 2) [Member] | Short-Term Bond Mutual Funds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 0 | | 0 | |
Significant Other Observable Inputs (Level 2) [Member] | Foreign Exchange Forward Contracts [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 214 | | 121 | |
Liabilities measured at fair value on a recurring basis | -1,141 | | -131 | |
Significant Other Observable Inputs (Level 2) [Member] | Deferred Compensation Plan Assets [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 0 | [1] | 0 | [1] |
Significant Unobservable Inputs (Level 3) [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Total | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) [Member] | Certificates of Deposit [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) [Member] | Pre-Refunded Bonds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | ' | | 0 | |
Significant Unobservable Inputs (Level 3) [Member] | Short-Term Bond Mutual Funds [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) [Member] | Foreign Exchange Forward Contracts [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | 0 | | 0 | |
Significant Unobservable Inputs (Level 3) [Member] | Deferred Compensation Plan Assets [Member] | ' | | ' | |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | | ' | |
Assets measured at fair value on a recurring basis | $0 | [1] | $0 | [1] |
|
[1] | Recorded as an Other asset with an offsetting liability for the obligation to its employees in Other liabilities. |