Debt (Narratives) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2016	Jan. 23, 2015
Line of Credit Facility [Line Items]
Income tax expense as a percentage of income from continuing operations	35.00%	111.00%	34.00%	55.00%
Line of Credit Facility, Maximum Borrowing Capacity	$ 75,000,000		$ 75,000,000
Unused portion of the New Revolving Credit Facility	86,821,000		86,821,000
Outstanding borrowings	134,000,000		134,000,000
Outstanding letters of credit	4,179,000		4,179,000
Fees and other costs paid to execute New Revolving Credit Facility	168,000		168,000
Debt Instrument, Unamortized Discount	$ 558,000		$ 558,000
Stated interest rate percentage	7.875%		7.875%
Proceeds from Lines of Credit	$ 195,000,000
Repayments of Lines of Credit	61,000,000
Current portion of long term debt	43,045,000		$ 43,045,000		$ 43,246,000
Line of Credit, Current	30,000,000		30,000,000
Deferred Costs	1,574,000		1,574,000
Accumulated Amortization, Deferred Finance Costs	525,000		525,000		367,000
Unsecured credit lines	4,720,000		4,720,000
Amount drawn on unsecured credit lines			0
Credit line availability	823,000		823,000		1,590,000
Long-term Debt and Capital Lease Obligations, Current	545,000		545,000
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	272,000		272,000
Standby Letters of Credit
Line of Credit Facility [Line Items]
Outstanding letters of credit	3,907,000		3,907,000
Minimum [Member]
Line of Credit Facility [Line Items]
Maximum availability under New Revolving Credit Facility	150,000,000		150,000,000
Maximum [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	225,000,000		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		125,000,000
Long-term Debt [Member]
Line of Credit Facility [Line Items]
New Senior Subordinated note issued	124,442,000		124,442,000			$ 106,250,000
Debt Instrument, Annual Principal Payment	3,125,000		3,125,000
Repayments of Lines of Credit			6,250,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Unamortized Discount	943,000		943,000
New Revolving Credit Facility | Unsecured Lines of Credit
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	10,733,000		10,733,000
Outstanding borrowings	4,057,000		4,057,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Current portion of long term debt	$ 12,500,000		$ 12,500,000