Acquisitions (Narratives) (Details) - USD ($)	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016
Business Acquisition [Line Items]
Stated interest rate percentage	7.875%
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	17 years
Restricted Cash and Cash Equivalents, Current			$ 822,000
Restricted Cash and Cash Equivalents, Noncurrent			4,609,000
Business Combination, Contingent Consideration, Liability			$ 5,431,000
Business Acquisition, Period Results Included in Combined Entity	$ 11,201,000	$ 11,291,000
Line of Credit Facility, Maximum Borrowing Capacity	75,000,000
Repayments of Lines of Credit	53,500,000
Goodwill	170,003,000			$ 170,716,000
Ergomatic Products LLC [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred, Other	1,175,000
Restricted Cash and Cash Equivalents, Noncurrent	587,000
Stahlhammer Bommern GmbH [Member]
Business Acquisition [Line Items]
Goodwill	0
STB [Member]
Business Acquisition [Line Items]
Revenues	16,000,000
Magnetek [Member]
Business Acquisition [Line Items]
Goodwill	$ 0
Customer relationships
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	17 years
Maximum [Member]
Business Acquisition [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 225,000,000
Subordinated Debt [Member]
Business Acquisition [Line Items]
Stated interest rate percentage	7.875%