Debt Part 2 (Details) In Thousands, unless otherwise specified		12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2013 JPMorgan Chase Bank, National Association USD ($)	Dec. 31, 2013 Amendment No. 1 to the 2011 Credit Agreement Effective April 25 , 2013	Dec. 31, 2013 Prudential Investment Management, Inc. Private Shelf Agreement USD ($)	Dec. 31, 2013 Amended Prudential Investment Management USD ($)	Dec. 31, 2013 Series A Notes USD ($)	Dec. 31, 2013 Series B Notes USD ($)	Dec. 31, 2013 Royal Bank of Scotland Citizens, N.A. USD ($)	Dec. 31, 2013 Royal Bank of Scotland Citizens, N.A. EUR (€)	Dec. 31, 2013 HSBC Bank (China) Company Limited, Shanghai Branch USD ($)
Line of Credit Facility
Expiration date		May 05, 2016	Mar. 01, 2018		Jul. 24, 2015
Maximum borrowing capacity		$ 125,000		$ 80,000				$ 2,757	€ 2,000	$ 5,000
Additional borrowing capacity available		62,500
Maximum borrowing capacity with additional borrowing		187,500
Sublimit on borrowings by foreign subsidiaries		100,000
Minimum commitment fee percentage		0.25%	0.20%
Maximum commitment fee percentage		0.40%	0.35%
Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings		1.50%	1.30%
Maximum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings		2.10%	1.90%
Interest rate spread added to the federal funds rate on Alternate Base Rate borrowings		0.50%	0.50%
Interest rate spread added to LIBOR rate for one month on Alternate Base Rate borrowings		1.00%	1.00%
Minimum interest rate spread added to LIBOR rate on Alternate Base Rate borrowings		0.50%	0.30%
Maximum interest rate spread added to LIBOR rate on Alternate Base Rate borrowings		1.10%	0.90%
Percentage collateral in stock of certain subsidiaries		65.00%
Covenant restriction, Maximum indebtedness to EBITDA		3.00 to 1			3.00 to 1
Covenant restriction, Minimum EBITDA to interest expense		3.50 to 1
Covenant restriction, Maximum leverage after paying dividends or repuchasing stock		2.00 to 1			2.00 to 1
Restriction on dividends and repurchases of common stock, Minimum		50,000		12,000	50,000
Restriction on dividends and repurchases of common stock, Maximum		75,000		40,000	75,000
Covenant restriction, Maximum leverage after acquisitions		2.75 to 1			2.75 to 1
Covenant restriction, Maximum level that can be paid for acquisitions		25,000			25,000
Amount outstanding		10,000			20,000					1,500
Weighted average interest rate at end of period		1.47%
Face amount						10,000	10,000
Interest rate, Stated percentage						4.00%	4.10%			5.10%
Payment Terms						7 year term	10 year term
Maturity date range, Start						Mar. 01, 2014	Jun. 01, 2015
Maturity date range, End						Mar. 01, 2018	Jun. 01, 2021
Original debt amount owed to previous owners of Water Star, Inc.	1,500
Amount Outstanding on notes payable to owners of Water Star, Inc.	$ 0