Long-Term Debt and Other Borrowings (Details)			12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 Domestic Line of Credit [Member] USD ($)	Dec. 31, 2012 Domestic Line of Credit [Member] USD ($)	Dec. 31, 2013 Senior Notes at 5.90% [Member] USD ($)	Dec. 31, 2012 Senior Notes at 5.90% [Member] USD ($)	Dec. 31, 2013 Senior Notes at 6.30% [Member] USD ($)	Dec. 31, 2012 Senior Notes at 6.30% [Member] USD ($)	Dec. 31, 2013 Senior Notes at 6.56% [Member] USD ($)	Dec. 31, 2012 Senior Notes at 6.56% [Member] USD ($)	Dec. 31, 2013 Senior Notes at 5.09% [Member] USD ($)	Dec. 31, 2012 Senior Notes at 5.09% [Member] USD ($)	Dec. 31, 2013 Senior Notes at 5.67% [Member] USD ($)	Dec. 31, 2012 Senior Notes at 5.67% [Member] USD ($)	Dec. 31, 2013 Senior Notes at 4.00% [Member] USD ($)	Dec. 31, 2012 Senior Notes at 4.00% [Member] USD ($)	Dec. 31, 2013 Partnership Line of Credit [Member] USD ($)	Feb. 28, 2014 Partnership Line of Credit [Member] USD ($)	May 14, 2013 Partnership Line of Credit [Member] USD ($)	Dec. 31, 2012 Partnership Line of Credit [Member] USD ($)	Dec. 31, 2013 European Line of Creidt [Member] USD ($)	Dec. 31, 2013 European Line of Creidt [Member] EUR (€)	Dec. 31, 2012 European Line of Creidt [Member] USD ($)	Dec. 31, 2013 Other Debt [Member] USD ($)	Dec. 31, 2012 Other Debt [Member] USD ($)
Debt Instrument [Line Items]
Senior Note, stated percentage rate					5.90%		6.30%		6.56%		5.09%		5.67%		4.00%
Maturity date			Oct. 29, 2015		Apr. 30, 2016		Apr. 30, 2013		Apr. 30, 2015		Dec. 15, 2017		Dec. 15, 2020		Apr. 29, 2020		Oct. 15, 2017
Long-term debt	$ 387,816,000	$ 366,709,000	$ 52,768,000	$ 51,218,000	$ 90,000,000	$ 90,000,000	$ 0	$ 35,000,000	$ 90,000,000	$ 90,000,000	$ 65,000,000	$ 65,000,000	$ 25,000,000	$ 25,000,000	$ 35,000,000	$ 0				$ 10,050,000	$ 0		$ 0	$ 89,000	$ 441,000
Current portion of long-term debt	(89,000)	(35,441,000)
Total long-term debt	387,727,000	331,268,000
Current borrowing capacity			278,000,000														67,400,000		40,000,000		6.9	5,000,000
Borrowing capacity prior to amendment			300,000,000																20,000,000
Increased borrowing capacity available			150,000,000
Maximum borrowing capacity			428,000,000														100,000,000
Current amount outstanding			52,800,000														29,959,000	30,000,000
Net availability			215,700,000														37,000,000
Interest rate description			British Bankers Association LIBOR rate plus 1.5% to 2.5%
Weighted average interest rate			2.40%														2.5625%
Sublimit applicable to letters of credit																	20,000,000		5,000,000
Uncommitted expansion feature																	30,000,000		20,000,000
Covenant description															20.0		4.0 to 1.0
Minimum interest rate premium																	2.25%		2.25%		0.75%	0.75%
Commitment fee percentage																	0.375%
Maximum interest rate premium																	2.50%
Limitation on percentage of foreign subsidiaries																	65.00%
Commitment fee, maximum			0.50%
Commitment fee, minimum			0.225%
Outstanding letters of credit and guarantees			9,500,000
Scheduled Maturities Detail [Table]
2014	89,000
2015	172,727,000
2016	90,000,000
2017	65,000,000
2018	0
Thereafter	60,000,000
Long-term debt	$ 387,816,000	$ 366,709,000	$ 52,768,000	$ 51,218,000	$ 90,000,000	$ 90,000,000	$ 0	$ 35,000,000	$ 90,000,000	$ 90,000,000	$ 65,000,000	$ 65,000,000	$ 25,000,000	$ 25,000,000	$ 35,000,000	$ 0				$ 10,050,000	$ 0		$ 0	$ 89,000	$ 441,000