Discontinued Operations (Details)	12 Months Ended			1 Months Ended		12 Months Ended					1 Months Ended	3 Months Ended					12 Months Ended				3 Months Ended							12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Feb. 28, 2013 Venezuela USD ($)	Aug. 31, 2012 Venezuela USD ($)	Dec. 31, 2013 Venezuela USD ($)	Dec. 31, 2012 Venezuela USD ($)	Dec. 31, 2011 Venezuela USD ($)	Feb. 28, 2013 Venezuela VEB	Dec. 31, 2012 Venezuela VEB	Jul. 31, 2013 Canada USD ($)	Jun. 30, 2013 Canada USD ($)	Mar. 31, 2013 Canada USD ($)	Dec. 31, 2012 Canada USD ($)	Sep. 30, 2012 Canada USD ($)	Jun. 30, 2012 Canada USD ($)	Dec. 31, 2013 Canada USD ($)	Dec. 31, 2012 Canada USD ($)	Dec. 31, 2011 Canada USD ($)	Jul. 31, 2013 Canada CAD	Sep. 30, 2013 Contract Water Treatment Business USD ($)	Jun. 30, 2013 Contract Water Treatment Business USD ($)	Mar. 31, 2013 Contract Water Treatment Business USD ($)	Dec. 31, 2012 Contract Water Treatment Business USD ($)	Sep. 30, 2012 Contract Water Treatment Business USD ($)	Jun. 30, 2012 Contract Water Treatment Business USD ($)	Mar. 31, 2012 Contract Water Treatment Business USD ($)	Dec. 31, 2013 Contract Water Treatment Business USD ($)	Dec. 31, 2012 Contract Water Treatment Business USD ($)	Dec. 31, 2011 Contract Water Treatment Business USD ($)
Discontinued Operations
Sale price of expropriated assets					$ 441,700,000
Initial payment received from sale of expropriated assets					176,700,000
Remitted amount					50,000,000
Installment payments, including an annual charge, received from sale of expropriated assets						69,300,000	16,800,000
Remaining expected proceeds from sale of expropriated assets						182,000,000
Reduction in previously unrecognized tax benefit							15,500,000
Translation gain				1,400,000
Exchange rate used for remeasurement of net liabilities									6.3	4.3
Impairment charges												3,900,000	2,100,000	11,600,000	27,700,000	40,800,000	6,400,000	80,200,000			2,400,000			46,800,000				2,400,000	46,800,000
Cash proceeds											12,300,000
Note receivable																				8,100,000
Contingent consideration																				5,000,000
Potential tax refund																				1,600,000
Summary of operating results of the discontinued operations
Revenue	27,883,000	59,913,000	70,845,000														24,458,000	50,557,000	53,591,000		400,000	1,400,000	1,500,000	1,900,000	2,000,000	2,200,000	3,300,000	3,425,000	9,356,000	17,254,000
Expenses and selling, general and administrative	26,045,000	61,884,000	74,827,000			883,000	1,275,000	1,302,000									21,810,000	50,521,000	59,421,000									3,352,000	10,088,000	14,104,000
Loss (recovery) attributable to expropriation and impairments	(57,613,000)	(9,957,000)	4,036,000			(66,344,000)	(136,947,000)	3,092,000									6,376,000	80,159,000	944,000									2,355,000	46,831,000
Other (income) loss, net	(3,580,000)	(425,000)	55,000			(4,552,000)	(219,000)	(150,000)									(30,000)	(130,000)	228,000									1,002,000	(76,000)	(23,000)
Provision for (benefit from) income taxes	(983,000)	(27,565,000)	(29,000)				(13,509,000)	1,719,000									166,000	2,564,000	(2,860,000)									(1,149,000)	(16,620,000)	1,112,000
Income (loss) from discontinued operations, net of tax	64,014,000	35,976,000	(8,044,000)			70,013,000	149,400,000	(5,963,000)									(3,864,000)	(82,557,000)	(4,142,000)									(2,135,000)	(30,867,000)	2,061,000
Summary of balance sheet data for discontinued operations
Cash	74,000	904,000				74,000	113,000							791,000				791,000
Accounts receivable	288,000	10,146,000				1,000	17,000							9,148,000				9,148,000						981,000				287,000	981,000
Inventory	50,000	11,206,000												9,826,000				9,826,000						1,380,000				50,000	1,380,000
Other current assets	30,000	1,851,000				16,000	41,000							1,810,000				1,810,000										14,000
Total current assets associated with discontinued operations	442,000	24,107,000				91,000	171,000							21,575,000				21,575,000						2,361,000				351,000	2,361,000
Property, plant and equipment	560,000	3,312,000																						3,312,000				560,000	3,312,000
Deferred tax assets	20,358,000	22,928,000																						22,928,000				20,358,000	22,928,000
Total assets associated with discontinued operations	21,360,000	50,347,000				91,000	171,000							21,575,000				21,575,000						28,601,000				21,269,000	28,601,000
Accounts payable	368,000	4,080,000				366,000	499,000							3,345,000				3,345,000						236,000				2,000	236,000
Accrued liabilities	2,865,000	7,394,000				1,998,000	4,335,000							2,724,000				2,724,000						335,000				867,000	335,000
Deferred revenue		1,186,000												669,000				669,000						517,000					517,000
Total current liabilities associated with discontinued operations	3,233,000	12,660,000				2,364,000	4,834,000							6,738,000				6,738,000						1,088,000				869,000	1,088,000
Other long-term liabilities	447,000	1,044,000				447,000	455,000							589,000				589,000
Total liabilities associated with discontinued operations	$ 3,680,000	$ 13,704,000				$ 2,811,000	$ 5,289,000							$ 7,327,000				$ 7,327,000						$ 1,088,000				$ 869,000	$ 1,088,000