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Business Combinations (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
GOODWILL	$ 100,722		$ 55,831			$ 19,828
Genesis
Acquired Finite-Lived Intangible Assets [Line Items]
Ownership percentage acquired	100.00%
Purchase price	$ 107,539
Escrow deposit	3,350
GOODWILL	45,236
Genesis | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 32,350
Acquired intangible asset, useful life	11 years
Genesis | Technology, trademark, tradename
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 11,350
Acquired intangible asset, useful life	6 years
RC
Acquired Finite-Lived Intangible Assets [Line Items]
Ownership percentage acquired		100.00%
Purchase price		$ 4,453
GOODWILL		4,072
RC | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired		$ 111
Acquired intangible asset, useful life		1 year
RC | Technology, trademark, tradename
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired		$ 594
Acquired intangible asset, useful life		10 years
LDD
Acquired Finite-Lived Intangible Assets [Line Items]
Ownership percentage acquired			100.00%
Purchase price			$ 9,992
GOODWILL			5,276
LDD | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired			$ 1,006
Acquired intangible asset, useful life			6 years
LDD | Technology, trademark, tradename
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired			$ 2,608
Acquired intangible asset, useful life			6 years
ILT
Acquired Finite-Lived Intangible Assets [Line Items]
Ownership percentage acquired				100.00%
Purchase price				$ 40,256
GOODWILL				19,467
ILT | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 11,660
Acquired intangible asset, useful life				13 years
ILT | Technology, trademark, tradename
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired				$ 7,480
Acquired intangible asset, useful life				8 years
OptiGrate
Acquired Finite-Lived Intangible Assets [Line Items]
Ownership percentage acquired					100.00%
Purchase price					$ 16,870
GOODWILL					8,900
OptiGrate | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired					$ 1,010
Acquired intangible asset, useful life					4 years
OptiGrate | Technology, trademark, tradename
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired					$ 4,650
Acquired intangible asset, useful life					9 years
BSI
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase price						1,481
Intangible assets acquired						$ 1,395
Acquired intangible asset, useful life						7 years
GOODWILL						$ 0
Menara
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase price							$ 46,831
GOODWILL							19,325
Menara | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired							$ 9,500
Acquired intangible asset, useful life							10 years
Menara | Technology, trademark, tradename
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired							$ 9,900
Acquired intangible asset, useful life							7 years

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