Segment Reporting (Schedule of Segment Reporting Information, by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended													12 Months Ended						9 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Sep. 30, 2014
Net Sales:
Total net sales														$ 660,579		$ 659,486		$ 612,466
Income (Loss) Before Income Taxes:
Total operating income (loss)	(22,795)	[1]	13,759	[1]	(23,221)	[1]	6,434	[1]	9,558		12,602	11,752	8,491	(25,823)		42,403		19,905
Total income before income taxes														(53,060)		23,326		(3,810)
Interest Expense, net:
Interest expense, net														16,880		18,096		19,869
Capital Expenditures:
Capital expenditures														24,754		25,344		26,352
Total Assets:
Total assets	398,751								588,322					398,751		588,322
Goodwill impairment charge (benefit)														51,458
Continuing Operations [Member]
Net Sales:
Total net sales														660,579		659,486		612,466
Income (Loss) Before Income Taxes:
Total income before income taxes														(25,823)		42,403		19,905
Depreciation and Amortization:
Total depreciation and amortization														27,105	[2]	29,286	[2]	29,405	[2]
Interest Expense, net:
Interest expense, net														16,880		18,096		19,869
Capital Expenditures:
Capital expenditures														23,516		21,576		22,909
Total Assets:
Total assets	398,751								491,353					398,751		491,353
Intersegment Eliminations [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														(38,243)		(44,012)		(55,762)
Total Assets:
Total assets	(251,085)								(259,267)					(251,085)		(259,267)
Electronics [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														249,304		230,946		216,053
Income (Loss) Before Income Taxes:
Total income before income taxes														17,444		20,732		15,851
Depreciation and Amortization:
Total depreciation and amortization														4,432		4,800		4,485
Interest Expense, net:
Interest expense, net														695		760		1,342
Capital Expenditures:
Capital expenditures														3,541		4,667		3,435
Total Assets:
Total assets	95,140								105,352					95,140		105,352
Electronics [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														214,141		189,809		164,196
Electronics [Member] | Intersegment Eliminations [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														35,163		41,137		51,857
Control Devices [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														309,738		294,020		271,765
Income (Loss) Before Income Taxes:
Total income before income taxes														35,387		32,331		20,945
Depreciation and Amortization:
Total depreciation and amortization														9,545		9,877		9,119
Interest Expense, net:
Interest expense, net														303		182		254
Capital Expenditures:
Capital expenditures														13,658		9,906		8,788
Total Assets:
Total assets	115,703								105,730					115,703		105,730
Control Devices [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														306,658		291,145		267,860
Control Devices [Member] | Intersegment Eliminations [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														3,080		2,875		3,905
Corporate [Member] | Continuing Operations [Member]
Depreciation and Amortization:
Total depreciation and amortization														130		183		188
Interest Expense, net:
Interest expense, net														13,118		15,980		15,898
Total interest expense, net														(19,067)	[3]	(17,871)	[3]	(17,474)	[3]
Capital Expenditures:
Capital expenditures														156		340		1,584
Total Assets:
Total assets	279,013	[4]							301,889	[4]				279,013	[4]	301,889	[4]
PST [Member]
Total Assets:
Goodwill impairment charge (benefit)	27,960		(5,802)		29,300									51,458						23,498
PST [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														139,780		178,532		180,410
Income (Loss) Before Income Taxes:
Total income before income taxes														(59,587)	[5]	7,211	[5]	583	[5]
Depreciation and Amortization:
Total depreciation and amortization														12,998		14,426		15,613
Interest Expense, net:
Interest expense, net														2,764		1,174		2,375
Capital Expenditures:
Capital expenditures														6,161		6,663		9,102
Total Assets:
Total assets	159,980								237,649					159,980		237,649
PST [Member] | Operating Segments [Member] | Continuing Operations [Member]
Net Sales:
Total net sales														139,780		178,532		180,410
PST [Member] | Intersegment Eliminations [Member] | Continuing Operations [Member]
Net Sales:
Total net sales

[1] Goodwill impairment of $29,300, $(5,802), and $27,960 related to the PST segment was recorded for the quarters ended June 30, 2014, September 30, 2014 and December 31, 2014, respectively, of which $6,436, $(1,274) and $6,142 was attributable to noncontrolling interest.

[2] These amounts represent depreciation and amortization on property, plant and equipment and certain intangible assets.

[3] Unallocated Corporate expenses include, among other items, accounting, finance, legal, information technology costs as well as share-based compensation.

[4] Assets located at Corporate consist primarily of cash, intercompany loan receivables, equity investments and investments in subsidiaries.

[5] The PST operating loss for the year ended December 31, 2014 includes a goodwill impairment charge of $51,458.