Acquisitions (Narratives) (Details) - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Dec. 21, 2017
Business Acquisition [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment	$ (11,100,000)	$ 0
Revenue from Contract with Customer, Excluding Assessed Tax	224,992,000	203,726,000
Equity Method Investments				$ 3,359,000
Business Acquisition, Period Results Included in Combined Entity	13,503,000	19,595,000
Severance Costs	1,602,000
Proceeds from Secured Lines of Credit	445,000,000
Goodwill	330,368,000		$ 347,434,000
Accrued liabilities	92,300,000		$ 99,963,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(9,480,000)	(14,751,000)
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Business Acquisition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	11,104,000	8,426,000
Goodwill	7,443,000
Accrued liabilities	2,125,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	$ (660,000)	$ 59,000