ACQUISITIONS AND DISPOSITION (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 23, 2015	Jun. 19, 2014	Jun. 19, 2014	Jul. 25, 2014		Dec. 31, 2014
Business Acquisition and Disposition [Line Items]
Revenues	$ 142,015,000	$ 82,646,000
Operating income	9,359,000	2,881,000
Liabilities assumed [Abstract]
Goodwill	117,678,000							117,573,000
Network Power Systems [Member]
Business Acquisition and Disposition [Line Items]
Revenues			900,000
Disposition Sale of NPS [Abstract]
Proceeds from sale of business			9,000,000
Proceeds from sale of business in escrow			1,000,000
Number of months of manufacturing service agreement			24 months
Deferred revenue			9,000,000
Power Solutions [Member]
Business Acquisition and Disposition [Line Items]
Payment for acquisitions, net of cash acquired					109,900,000
Percentages of owned joint venture investment (in hundredths)				49.00%	49.00%
Assets acquired [Abstract]
Cash				20,912,000	20,912,000
Accounts receivable				29,389,000	29,389,000
Inventories				36,429,000	36,429,000
Other current assets				7,350,000	7,350,000
Property, plant and equipment				28,175,000	28,175,000
Intangible assets				33,220,000	33,220,000
Other assets				19,171,000	19,171,000
Total identifiable assets				174,646,000	174,646,000
Liabilities assumed [Abstract]
Accounts payable				(26,180,000)	(26,180,000)
Accrued expenses				(25,545,000)	(25,545,000)
Other current liabilities				223,000	223,000
Noncurrent liabilities				(42,062,000)	(42,062,000)
Total liabilities assumed				(93,564,000)	(93,564,000)
Net identifiable assets acquired				81,082,000	81,082,000
Goodwill				49,710,000	49,710,000
Net assets acquired				130,792,000	130,792,000
Consideration transferred [Abstract]
Cash Paid				130,792,000
Assumption of liability				0
Fair value of consideration transferred				130,792,000
Deferred consideration				0
Total consideration paid				130,792,000
2014 Acquired Companies [Member]
Business Acquisition and Disposition [Line Items]
Acquisition-related costs	400,000
Revenues	58,800,000
Operating income	5,900,000
Unaudited Pro forma Consolidated Results of Operations [Abstract]
Revenue		160,637,000
Net earnings		1,658,000
2014 Acquired Companies [Member] | Acquisition Date Fair Values (As adjusted) [Member]
Assets acquired [Abstract]
Cash	27,456,000
Accounts receivable	38,764,000
Inventories	54,061,000
Other current assets	9,965,000
Property, plant and equipment	38,075,000
Intangible assets	73,220,000
Other assets	21,516,000
Total identifiable assets	263,057,000
Liabilities assumed [Abstract]
Accounts payable	(36,862,000)
Accrued expenses	(30,852,000)
Other current liabilities	166,000
Noncurrent liabilities	(59,376,000)
Total liabilities assumed	(126,924,000)
Net identifiable assets acquired	136,133,000
Goodwill	100,016,000
Net assets acquired	236,149,000
Consideration transferred [Abstract]
Cash Paid	236,149,000
Assumption of liability	0
Fair value of consideration transferred	236,149,000
Deferred consideration	0
Total consideration paid	236,149,000
2014 Acquired Companies [Member] | Class A [Member]
Unaudited Pro forma Consolidated Results of Operations [Abstract]
Earnings per common share - basic and diluted (in dollars per share)		$ 0.13
2014 Acquired Companies [Member] | Class B [Member]
Unaudited Pro forma Consolidated Results of Operations [Abstract]
Earnings per common share - basic and diluted (in dollars per share)		$ 0.15
Connectivity Solutions [Member]
Business Acquisition and Disposition [Line Items]
Payment for acquisitions, net of cash acquired						98,800,000
Assets acquired [Abstract]
Cash						6,544,000	[1]
Accounts receivable						9,375,000	[1]
Inventories						17,632,000	[1]
Other current assets						2,615,000	[1]
Property, plant and equipment						9,900,000	[1]
Intangible assets						40,000,000	[1]
Other assets						2,345,000	[1]
Total identifiable assets						88,411,000	[1]
Liabilities assumed [Abstract]
Accounts payable						(10,682,000)	[1]
Accrued expenses						(5,307,000)	[1]
Other current liabilities						(57,000)	[1]
Noncurrent liabilities						(17,314,000)	[1]
Total liabilities assumed						(33,360,000)	[1]
Net identifiable assets acquired						55,051,000	[1]
Goodwill						50,306,000	[1]
Net assets acquired						105,357,000	[1]
Consideration transferred [Abstract]
Cash Paid						105,357,000	[1]
Assumption of liability						0	[1]
Fair value of consideration transferred						105,357,000	[1]
Deferred consideration						0	[1]
Total consideration paid						$ 105,357,000	[1]

[1] The Company acquired the U.S. and U.K. entities of Connectivity Solutions on July 25, 2014 and the China entity of Connectivity Solutions on August 29, 2014. These values represent the estimated fair values as of the respective acquisition dates.