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Acquisitions (Details) (USD $)	12 Months Ended		1 Months Ended	12 Months Ended					12 Months Ended			12 Months Ended		12 Months Ended						12 Months Ended
Acquisitions (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2014 ULSP [Member]	Dec. 31, 2013 LaserComp [Member]	Dec. 31, 2013 LaserComp [Member] Customer Relationships [Member]	Dec. 31, 2013 LaserComp [Member] Unpatented Technology [Member]	Dec. 31, 2013 ESS [Member]	Dec. 19, 2013 ESS [Member]	Dec. 31, 2013 ESS [Member] Unpatented Technology [Member]	Dec. 31, 2013 Nonlinear Dynamics [Member]	Aug. 07, 2013 Nonlinear Dynamics [Member]	Dec. 31, 2013 Scarabaeus [Member]	Jul. 31, 2013 Scarabaeus [Member]	Dec. 31, 2013 Scarabaeus [Member] Unpatented Technology [Member]	Dec. 31, 2013 Scarabaeus [Member] Software and Customer Relationships [Member]	Dec. 31, 2013 Acquisitions in 2013 [Member]	Dec. 31, 2011 Anter [Member]	Dec. 31, 2012 Baehr [Member]	Jan. 30, 2012 Baehr [Member]	Dec. 31, 2012 Israeli sales and service distributor [Member]	Dec. 31, 2012 Blue Reference [Member]
Business Acquisition [Line Items]
Cash acquired																$ 295,000
Accounts receivable acquired																1,616,000
Inventory acquired																975,000
Goodwill	350,350,000	316,834,000		6,000,000				2,000,000			20,000,000		3,000,000			31,231,000
Intangible assets acquired				5,000,000				1,000,000			3,000,000		2,000,000			10,844,000
Other assets acquired																377,000
Total assets acquired																45,338,000
Accrued expenses and other liabilities acquired																2,013,000
Deferred tax liability acquired																1,635,000
Cash consideration paid for acquired entity			3,000,000	12,000,000			3,000,000			23,000,000		4,000,000				41,690,000	11,000,000	12,000,000		6,000,000	14,000,000
Debt acquired																			$ 1,000,000
Weighted-average useful life of acquired intangible assets					7 years	10 years			10 years	5 years				10 years	7 years
Pro forma effect of business acquisition	The pro forma effect of the ongoing operations for Waters, LaserComp, ESS, Nonlinear Dynamics, Scarabaeus, Blue Reference, the Israeli sales and service distributor, Baehr and Anter, either individually or in the aggregate, as though these acquisitions had occurred at the beginning of the periods covered by this report was not significant.