Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill [Line Items]
Goodwill, currency translation losses (gains)			$ 10,200,000	$ (900,000)
Goodwill, additions from new business combinations			0	134,200,000
Goodwill, adjustments or accruals				(1,300,000)
Amortization expense, intangible assets	$ 7,300,000	$ 5,800,000	14,600,000	$ 10,400,000
Earn-Out Arrangements [Member]
Goodwill [Line Items]
Goodwill, adjustments or accruals			$ 800,000