Business Acquisitions, Goodwill and Other Intangible Assets - Net Assets Acquired (Details) - USD ($)	Mar. 31, 2017	Nov. 30, 2015	Jun. 30, 2016	Mar. 31, 2016
Identifiable intangible assets:
Goodwill	$ 91,054,000		$ 75,337,000
Caltrop [Member] [Domain]
Business Acquisition [Line Items]
Purchase price	28,177,000
Identifiable intangible assets:
Total identifiable intangible assets	7,600,000
Goodwill	15,717,000
Cash paid	16,310,000
Second cash payment	8,500,000
Business Combination, Net Working Capital Adjustment	$ 3,367,000
Oil and Gas
Business Acquisition [Line Items]
Purchase price		$ 124,498,000
Cash and cash equivalents		355,000
Accounts receivable		28,263,000
Prepaid expenses and other current assets		7,228,000
Property and equipment		3,552,000
Identifiable intangible assets:
Total identifiable intangible assets		44,500,000
Goodwill		60,294,000
Other non-current assets		20,683,000
Accounts payable		(2,544,000)
Accrued compensation and benefits		(7,201,000)
Other accrued liabilities		(5,110,000)
Current portion of long-term debt		(6,485,000)
Long-term debt, net of current portion		(18,547,000)
Non-controlling interest		(490,000)
Net assets acquired		124,498,000
Cash paid		119,955,000
Second cash payment		7,500,000
Business Combination, Net Working Capital Adjustment		2,957,000		$ 2,354,000
Oil and Gas | Customer relationships and backlog
Identifiable intangible assets:
Total identifiable intangible assets		43,500,000
Oil and Gas | Internally developed software
Identifiable intangible assets:
Total identifiable intangible assets		1,000,000
Previously Reported | Oil and Gas
Business Acquisition [Line Items]
Cash and cash equivalents		355,000
Accounts receivable		26,406,000
Prepaid expenses and other current assets		7,276,000
Property and equipment		3,552,000
Identifiable intangible assets:
Total identifiable intangible assets		44,500,000
Goodwill		64,673,000
Other non-current assets		20,683,000
Accounts payable		(2,587,000)
Accrued compensation and benefits		(7,199,000)
Other accrued liabilities		(5,210,000)
Current portion of long-term debt		(6,447,000)
Long-term debt, net of current portion		(18,547,000)
Non-controlling interest		0
Net assets acquired		127,455,000
Previously Reported | Oil and Gas | Customer relationships and backlog
Identifiable intangible assets:
Total identifiable intangible assets		43,500,000
Previously Reported | Oil and Gas | Internally developed software
Identifiable intangible assets:
Total identifiable intangible assets		1,000,000
Adjustment | Oil and Gas
Business Acquisition [Line Items]
Cash and cash equivalents		0
Accounts receivable		1,857,000
Prepaid expenses and other current assets		(48,000)
Property and equipment		0
Identifiable intangible assets:
Total identifiable intangible assets		0
Goodwill		(4,379,000)
Other non-current assets		0
Accounts payable		(43,000)
Accrued compensation and benefits		2,000
Other accrued liabilities		(100,000)
Current portion of long-term debt		38,000
Long-term debt, net of current portion		0
Non-controlling interest		490,000
Net assets acquired		(2,957,000)
Adjustment | Oil and Gas | Customer relationships and backlog
Identifiable intangible assets:
Total identifiable intangible assets		0
Adjustment | Oil and Gas | Internally developed software
Identifiable intangible assets:
Total identifiable intangible assets		$ 0