Long-Term Debt and Capital Lease Obligations (Details)			1 Months Ended	12 Months Ended
	Nov. 30, 2015 USD ($)	Apr. 16, 2013 USD ($)	Jul. 31, 2014 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2016 USD ($)	Mar. 25, 2016	Dec. 01, 2015 USD ($)	Jul. 31, 2015 Payments	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)
Debt Instrument [Line Items]
Current portion of long-term debt				$ 18,339,000	$ 50,000
Long-term debt, net of current portion				79,243,000	55,000
Other assets				18,383,000	5,303,000
Long Term Debt And Capital Lease Obligations Excluding Current				55,000	105,000
Deferred Finance Costs, Gross				(1,150,000)	0
Debt and Capital Lease Obligations				97,582,000	271,000
Long-term Debt And Capital Lease Obligations, Current Maturities				(18,339,000)	(216,000)
Long-term Debt And Capital Lease Obligations, Excluding Current Maturities				79,243,000	55,000
New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Senior Revolving Credit Facility, Maximum Borrowing Capacity	$ 175,000,000
Debt Instrument, Length Of Loan	5 years
Line of Credit Facility, Additional Borrowing Amount	$ 75,000,000
Other note payable
Debt Instrument [Line Items]
Subordinated Long-term Debt, Noncurrent				5,146,000	0
CoCo Debt [Member]
Debt Instrument [Line Items]
Current portion of long-term debt				7,551,000
Other Assets, Current				7,551,000
Other assets				22,435,000
Debt, Long-term and Short-term, Combined Amount				21,344,000	0
Long-term Debt				$ 21,344,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding					0
Long-term Debt					0
Line of Credit Facility [Abstract]
Senior Revolving Credit Facility, Maximum Borrowing Capacity		$ 95,000,000
Period Of Measurement For Earnings Before Interest, Taxes, Depreciation and Amortization				12 months
Letters of Credit, Amount Available For Issue		15,000,000
Subordinated Debt | Other note payable
Debt Instrument [Line Items]
Long-term Debt			$ 5,632,000					$ 891,000
Debt Instrument, Additional Periodic Payment				$ 667,000
Line of Credit Facility [Abstract]
Number Of Installment Payments | Payments									11
Debt Instrument, Periodic Payment			$ 517,000
Stated Finance Charge Rate			1.99%
Capital Lease Obligations
Debt Instrument [Line Items]
Capital Lease Obligations				0	166,000
Minimum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Fixed Charge Coverage Ratio	1.25
Line Of Credit Facility, Dividend Restrictions Threshold	$ 10,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.20%
Minimum | Revolving Credit Facility [Member]
Line of Credit Facility [Abstract]
Line of Credit Facility, Current Borrowing Capacity		$ 75,000,000
Debt Instrument, Length Of Loan		5 years
Maximum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Line of Credit Facility, Leverage Ratio	3.00
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.375%
Furniture And Equipment | Capital Lease Obligations
Debt Instrument [Line Items]
Capital Lease Obligations										$ 1,160,000	$ 756,000
RBS Citizen
Line of Credit Facility [Abstract]
Letters of Credit Outstanding, Amount				2,779,000	0
Letters of Credit and Indebtedness, Outstanding					166,000
RBS Citizen | Revolving Credit Facility [Member]
Line of Credit Facility [Abstract]
Letters of Credit Outstanding, Amount					2,048,000
Line of Credit Facility, Current Borrowing Capacity					75,000,000
Line of Credit Facility, Remaining Borrowing Capacity					$ 72,786,000
RBS Citizen | Minimum | Revolving Credit Facility [Member]
Line of Credit Facility [Abstract]
Fixed Charge Coverage Ratio					1.25
RBS Citizen | Minimum | Revolving Credit Facility [Member] | Prime Rate
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility					1.00%
RBS Citizen | Minimum | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility					2.00%
RBS Citizen | Maximum | Revolving Credit Facility [Member]
Line of Credit Facility [Abstract]
Line of Credit Facility, Leverage Ratio					2
RBS Citizen | Maximum | Revolving Credit Facility [Member] | Prime Rate
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility					1.50%
RBS Citizen | Maximum | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility					2.50%
Twelve Month Period Ending June 30, 2013 | RBS Citizen | Revolving Credit Facility [Member]
Line of Credit Facility [Abstract]
Earnings Before Interest, Taxes, Deprecation and Amortization					$ 20,000,000
Dividends, Cash				10,000,000
Pipeline Services
Line of Credit Facility [Abstract]
Business Acquisition, Cost Of Acquired Entity, Cash Paid in Year Two, Due in Period Two	$ 7,500,000
Business Combination, Net Working Capital Adjustment	2,957,000					$ 2,354,000
Pipeline Services | New Credit Agreement [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	102,000,000
Line of Credit Facility [Abstract]
Line of Credit Facility, Remaining Borrowing Capacity				97,221,000
Credit Agreement Two [Member] | Subordinated Debt | Other note payable
Debt Instrument [Line Items]
Long-term Debt				0
Standby Letters of Credit [Member] | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Senior Revolving Credit Facility, Maximum Borrowing Capacity	$ 15,000,000
Standby Letters of Credit [Member] | Minimum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Debt Issuance Costs, Fee Percentage	1.50%
Standby Letters of Credit [Member] | Maximum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Debt Issuance Costs, Fee Percentage	2.25%
Revolving Credit Facility [Member] | New Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Amount Outstanding				0
Line of Credit Facility [Abstract]
Senior Revolving Credit Facility, Maximum Borrowing Capacity	$ 100,000,000
Revolving Credit Facility [Member] | Pipeline Services | New Credit Agreement [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	27,000,000
Line of Credit Facility, Average Outstanding Amount				66,000,000
Line of Credit Facility [Abstract]
Debt Instrument, Fee Amount				1,916,000
Term Loan [Member] | New Credit Agreement [Member]
Debt Instrument [Line Items]
Current portion of long-term debt				5,625,000
Long-term debt, net of current portion				66,562,000
Long-term Debt				72,187,000
Line of Credit Facility [Abstract]
Debt Instrument, Face Amount	$ 75,000,000
Debt Issuance Cost				(1,150,000)
Long-term Debt Less Debt Issuance Costs				$ 65,412,000
Debt Instrument, Percent Of Outstanding Amount, Payable Quarterly	1.875%
Debt Instrument, Covenant Compliance, Conditional Term Rate One	50.00%
Debt Instrument, Covenant Compliance, Conditional Term Rate Two	0.00%
Debt Instrument, Covenant Compliance, Conditional Term Rate Based On Net Cash Proceeds From Asset Sales Subject To Certain Reinvestment Rights	100.00%
Debt Instrument, Covenant Compliance, Conditional Term Rate Based On Net Cash Proceeds From Issuance Of Debt Other Than Debt Permitted Under Credit Facility	100.00%
Debt Instrument, Covenant Compliance, Conditional Term Rate Based On Net Cash Proceeds From Events Of Loss Subject To Certain Reinvestments Rights	100.00%
Term Loan [Member] | Pipeline Services | New Credit Agreement [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 75,000,000
Line of Credit Facility [Abstract]
Stated interest rate							2.318%
Debt Instrument, Interest Rate, Effective Percentage				2.74%
Debt Instrument, Fee Amount				$ 1,332,000
London Interbank Offered Rate (LIBOR) [Member] | Minimum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Maximum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility	2.25%
Base Rate [Member] | Minimum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility	0.50%
Base Rate [Member] | Maximum | New Credit Agreement [Member]
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility	1.25%