Pension and Other Postretirement Benefit Plans (Fair values of the plans assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Financial instruments with significant Level 3 inputs
Foreign currency translation adjustment	$ (10,445)		$ 2,428	$ 1,796
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	40,368		43,145	36,895
Financial instruments with significant Level 3 inputs
Beginning balance, December 31, 2013	16,405
Total unrealized gains included in net gain	1,431	[1]
Foreign currency translation adjustment	(1,787)
Beginning balance, December 31, 2014	16,049
Foreign Plan [Member] | Held in Swiss Franc, Euro and USD [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	973
Foreign Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	23,320
Foreign Plan [Member] | Real estate investment fund
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	16,049
Foreign Plan [Member] | Fixed income / Bond securities:
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	0
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	0
Foreign Plan [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	26
Foreign Plan [Member] | Active Market Prices (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	24,293
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	973
Foreign Plan [Member] | Active Market Prices (Level 1) | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	23,320
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	0
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	26
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) | Equity Securities [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	26
Foreign Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Net assets of pension plan	16,049
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) | Equity Securities [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	16,049
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	0
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.