Debt (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2018	Mar. 31, 2016
Debt Instrument [Line Items]
Capital lease obligations	$ 551,000		$ 98,000
Total senior debt	551,000		98,000
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Acquired, at Acquisition, at Fair Value	(2,608,000)		0
Long-term Debt, Gross	432,500,000		375,463,000	$ 103,125,000
Outstanding borrowings	(14,340,000)		(12,243,000)
Long-term Debt	421,319,000		363,318,000
Current portion of long-term debt	52,568,000		60,064,000
Long-term Debt, Excluding Current Maturities	368,751,000		303,254,000
Maturities of Long-term Debt [Abstract]
2015			4,515,000
2016			4,483,000
2017			4,450,000
2018			4,450,000
2019			4,450,000
Thereafter			353,213,000
Total principal payments			375,561,000
Other Current Liabilities [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	$ 12,500,000	$ 9,375,000
STAHL [Member]
Debt Instrument [Line Items]
Long-term Debt			545,000,000
STAHL [Member] | Other Current Liabilities [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal			$ 57,037,000