Subsequent Events (Details) € in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) shares	Dec. 31, 2017 EUR (€) shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Subsequent Event [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired | $	$ 36,031		$ 1,561,737	$ 567,843
Number of shares authorized to be repurchased	20,000,000	20,000,000
Ettiingler [Member]
Subsequent Event [Line Items]
Subsequent Event, Date	Jan. 02, 2018	Jan. 02, 2018
Payments to Acquire Businesses, Net of Cash Acquired	$ 60,000	€ 50,000
Rosario [Member]
Subsequent Event [Line Items]
Subsequent Event, Date	Jan. 12, 2018	Jan. 12, 2018
Payments to Acquire Businesses, Net of Cash Acquired	$ 16,200	€ 13,500
January 2015 Authorization [Member]
Subsequent Event [Line Items]
Number of shares authorized to be repurchased	15,000,000	15,000,000
Stock Repurchase Program Expiration Date	Jan. 09, 2018	Jan. 09, 2018