Debt (Details)										0 Months Ended									0 Months Ended					3 Months Ended
	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 Revolving Credit Agreement [Member] USD ($)	Dec. 31, 2014 Revolving Credit Agreement [Member] USD ($)	Sep. 27, 2013 Revolving Credit Agreement [Member] USD ($)	Mar. 31, 2015 Revolving Credit Agreement [Member] Euro Member Countries, Euro USD ($)	Mar. 31, 2015 Revolving Credit Agreement [Member] Euro Member Countries, Euro EUR (€)	Dec. 31, 2014 Revolving Credit Agreement [Member] Euro Member Countries, Euro USD ($)	Dec. 31, 2014 Revolving Credit Agreement [Member] Euro Member Countries, Euro EUR (€)	Sep. 27, 2013 Revolving Credit Agreement [Member] London Interbank Offered Rate (LIBOR) [Member] Minimum [Member]	Sep. 27, 2013 Revolving Credit Agreement [Member] London Interbank Offered Rate (LIBOR) [Member] Maximum [Member]	Oct. 15, 2014 Senior Notes [Member] Minimum [Member]	Oct. 15, 2014 Senior Notes [Member] Maximum [Member]	Mar. 31, 2015 Senior Notes [Member] 3.97% Senior Notes [Member] USD ($)	Dec. 31, 2014 Senior Notes [Member] 3.97% Senior Notes [Member] USD ($)	Oct. 15, 2014 Senior Notes [Member] 3.97% Senior Notes [Member] USD ($)	Oct. 15, 2014 Senior Notes [Member] Adjusted for Certain Acquisitons [Member] Maximum [Member]	Sep. 27, 2013 Revolving Credit Agreement [Member] EUR (€)	Sep. 27, 2013 Revolving Credit Agreement [Member] London Interbank Offered Rate (LIBOR) [Member]	Mar. 31, 2015 Lines of Credit and Overdrafts [Member] USD ($)	Dec. 31, 2014 Lines of Credit and Overdrafts [Member] USD ($)	Mar. 31, 2015 Lines of Credit [Member] USD ($)	Dec. 31, 2014 Lines of Credit [Member] USD ($)	Mar. 31, 2015 Bank Overdrafts [Member] USD ($)	Dec. 31, 2014 Bank Overdrafts [Member] USD ($)	Mar. 31, 2015 Capital Lease Obligations [Member] USD ($)	Dec. 31, 2014 Capital Lease Obligations [Member] USD ($)
Debt Instrument [Line Items]
Carrying amount of debt			$ 360,922,000	$ 393,518,000		$ 1,622,000	€ 1,500,000	$ 37,618,000	€ 30,945,000					$ 100,000,000	$ 100,000,000											$ 2,649,000	$ 3,188,000
Fair value of debt	487,912,000	509,283,000	362,209,000	394,917,000										106,396,000	102,859,000					16,424,000	8,028,000					2,883,000	3,479,000
Borrowings under lines of credit and overdrafts	16,424,000	8,028,000																		16,424,000	8,028,000	15,100,000	7,550,000	1,324,000	478,000
Total debt, net of unamortized discounts	479,995,000	504,734,000
Less current maturities	(17,204,000)	(8,890,000)
Long-term debt	462,791,000	495,844,000
Stated interest rate			1.28%	1.33%												3.97%
Converted amount with accrued interest																100,000,000
Percent allowed to be prepaid																100.00%
Line of credit facility, maximum borrowing capacity					750,000,000													500,000,000				55,000,000
Line of credit facility with accordian feature, maximum borrowing capacity					1,000,000,000
Variable rate basis																			LIBOR
Variable basis spread										1.10%	1.70%
Remaining borrowing capacity			$ 389,078,000	$ 356,482,000
Debt covenant ratio of senior debt to EBITDA													3.25				3.50
Debt covenant ratio of total debt to EBITDA													4.00				4.25
Debt covenant ratio of EBITDA to cash interest expense												4.25
Line of credit, interest rate at period end																						1.17%	1.23%
Repayment period																								2 days