Fair Value Measurements - Schedule Of Assets And Liabilities Measured At Fair Value On Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total	$ 26,416		$ 10,106
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	1,101		1,070
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	23,917		7,985
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			44
Liabilities measured at fair value on a recurring basis			(225)
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	918	[1]	1,007	[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	24,835		8,992
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] | 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	23,917		7,985
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
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	918		1,007	[1]
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total	1,581		1,114
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	1,101		1,070
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			44
Liabilities measured at fair value on a recurring basis			(225)
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] | 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
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.