Debt (Narratives) (Details) - USD ($)	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016
Line of Credit Facility [Line Items]
Income tax expense as a percentage of income from continuing operations	33.00%	34.00%
Line of Credit Facility, Maximum Borrowing Capacity	$ 75,000,000
Unused portion of the New Revolving Credit Facility	78,845,000
Outstanding borrowings	141,500,000
Outstanding letters of credit	4,655,000
Fees and other costs paid to execute New Revolving Credit Facility	180,000
Debt Instrument, Unamortized Discount	$ 558,000
Stated interest rate percentage	7.875%
Proceeds from Lines of Credit	$ 195,000,000
Repayments of Lines of Credit	53,500,000
Current portion of long term debt	44,279,000		$ 43,246,000
Line of Credit, Current	31,250,000
Deferred Costs	1,574,000
Accumulated Amortization, Deferred Finance Costs	446,000		367,000
Unsecured credit lines	7,440,000
Amount drawn on unsecured credit lines	0
Credit line availability	986,000		1,590,000
Long-term Debt and Capital Lease Obligations, Current	529,000
Magnetek [Member]
Line of Credit Facility [Line Items]
Proceeds from Lines of Credit	188,900,000
ASU 2015_03 Retrospective Reclass [Member]
Line of Credit Facility [Line Items]
Fees and other costs paid to execute New Revolving Credit Facility			193,000
Financial Standby Letter of Credit
Line of Credit Facility [Line Items]
Outstanding letters of credit	749,000
Standby Letters of Credit
Line of Credit Facility [Line Items]
Outstanding letters of credit	3,906,000
Minimum [Member]
Line of Credit Facility [Line Items]
Maximum availability under New Revolving Credit Facility	150,000,000
Maximum [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	225,000,000
Bank Loan Obligations [Member]
Line of Credit Facility [Line Items]
Carrying amount of the Company's revolving credit facility	125,000,000
Long-term Debt [Member]
Line of Credit Facility [Line Items]
New Senior Subordinated note issued	109,375,000		$ 124,442,000
Debt Instrument, Annual Principal Payment	3,125,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Unamortized Discount	$ 943,000
New Revolving Credit Facility | Revolving Credit Facility [Member] | Eurodollar
Line of Credit Facility [Line Items]
Basis spread	1.00%
New Revolving Credit Facility | Unsecured Lines of Credit
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 8,384,000
Outstanding borrowings	$ 4,632,000
New Revolving Credit Facility | Minimum [Member] | Revolving Credit Facility [Member] | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread	0.50%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Current portion of long term debt	$ 12,500,000