Pension and Other Postretirement Benefit Plans (Fair values of the plans assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Financial instruments with significant Level 3 inputs
Foreign currency translation adjustments	$ 1,796		$ (628)	$ 5,529
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	36,895		33,082	30,662
Financial instruments with significant Level 3 inputs
Beginning balance, December 31, 2011	13,856
Total unrealized gains included in net gain	665	[1]
Foreign currency translation adjustments	310
Ending balance, December 31, 2012	14,831
Foreign Plan [Member] | Held in Swiss Franc, Euro and USD [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	848
Foreign Plan [Member] | Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	19,867
Foreign Plan [Member] | Real estate investment fund
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	10,733
Foreign Plan [Member] | Fixed income / Bond securities:
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	1,263
Foreign Plan [Member] | Real estate investment in specific properties 100% owned by the plan
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	4,098
Foreign Plan [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	86
Foreign Plan [Member] | Active Market Prices (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	21,978
Foreign Plan [Member] | Active Market Prices (Level 1) | Held in Swiss Franc, Euro and USD [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	848
Foreign Plan [Member] | Active Market Prices (Level 1) | Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	19,867
Foreign Plan [Member] | Active Market Prices (Level 1) | Real estate investment fund
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Active Market Prices (Level 1) | Fixed income / Bond securities:
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	1,263
Foreign Plan [Member] | Active Market Prices (Level 1) | Real estate investment in specific properties 100% owned by the plan
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Active Market Prices (Level 1) | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	86
Foreign Plan [Member] | Significant Observable Inputs (Level 2) | Held in Swiss Franc, Euro and USD [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Observable Inputs (Level 2) | Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Observable Inputs (Level 2) | Real estate investment fund
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Observable Inputs (Level 2) | Fixed income / Bond securities:
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Observable Inputs (Level 2) | Real estate investment in specific properties 100% owned by the plan
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Observable Inputs (Level 2) | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	86
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	14,831
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3) | Held in Swiss Franc, Euro and USD [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3) | Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3) | Real estate investment fund
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	10,733
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3) | Fixed income / Bond securities:
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3) | Real estate investment in specific properties 100% owned by the plan
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	4,098
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3) | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	$ 0

[1] Total unrealized gains are reported as a component of the pension adjustment in accumulated other comprehensive income in the consolidated statement of stockholders’ equity.