ACQUISITIONS AND DISPOSITION (Details) - USD ($)
$ / shares in Units, $ in Thousands |
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3 Months Ended |
12 Months Ended |
Jan. 23, 2015 |
Jul. 25, 2014 |
Jun. 19, 2014 |
Sep. 30, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Business Acquisition [Line Items] |
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| Payment for acquisitions, net of cash acquired |
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$ 0
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$ 0
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$ 208,693
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| Revenues |
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500,153
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567,080
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[1] |
487,076
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[1] |
| Operating income (loss) |
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(76,512)
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28,600
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[1] |
13,472
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[1] |
| Disposition Sale of NPS [Abstract] |
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| Deferred revenue |
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$ 0
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4,500
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| Network Power Systems [Member] |
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| Disposition Sale of NPS [Abstract] |
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| Number of months of manufacturing service agreement |
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24 months
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| Deferred revenue |
$ 9,000
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| Disposal of assets, net sales |
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$ 4,500
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4,500
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| Network Power Systems [Member] | Unipower LLC [Member] |
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| Disposition Sale of NPS [Abstract] |
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| Proceeds from sale of business |
9,000
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| Escrow on sale of business assets |
$ 1,000
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| Power Solutions [Member] |
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| Business Acquisition [Line Items] |
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| Payment for acquisitions, net of cash acquired |
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$ 109,900
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| Percentages of owned joint venture investment |
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49.00%
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| Other income |
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$ 4,200
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| Connectivity Solutions [Member] |
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| Business Acquisition [Line Items] |
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| Payment for acquisitions, net of cash acquired |
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$ 98,800
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| 2014 Acquired Companies [Member] |
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| Business Acquisition [Line Items] |
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| Acquisition-related costs |
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600
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7,300
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| Revenues |
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195,600
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230,300
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134,300
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| Operating income (loss) |
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$ 3,800
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$ 10,300
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(2,500)
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| Acquisition-related costs excluded from pro forma net earnings |
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14,900
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| Acquisition-related costs incurred but excluded from pro forma earnings during the period after tax |
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9,800
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| Unaudited Pro forma Consolidated Results of Operations |
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| Revenue |
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629,132
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| Net earnings |
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$ 11,705
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| 2014 Acquired Companies [Member] | Class A [Member] |
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| Unaudited Pro forma Consolidated Results of Operations |
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| Earnings per common share - basic and diluted (in dollars per share) |
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$ 0.94
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| 2014 Acquired Companies [Member] | Class B [Member] |
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| Unaudited Pro forma Consolidated Results of Operations |
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| Earnings per common share - basic and diluted (in dollars per share) |
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$ 1.02
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