Acquisitions, Intangible Assets (Details) - USD ($) $ in Thousands			6 Months Ended
	Feb. 15, 2019	May 11, 2018	Jun. 30, 2019
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired			$ 6,798
DP Engineering Ltd, CO. [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired	$ 6,798
DP Engineering Ltd, CO. [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, weighted average useful life	5 years
DP Engineering Ltd, CO. [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, weighted average useful life	15 years
True North Consulting, LLC [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired		$ 5,088
True North Consulting, LLC [Member] | Minimum [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, weighted average useful life		4 years
True North Consulting, LLC [Member] | Maximum [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets, weighted average useful life		15 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired			4,898
Customer Relationships [Member] | DP Engineering Ltd, CO. [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired	$ 4,898
Finite-lived intangible assets, weighted average useful life	15 years
Customer Relationships [Member] | True North Consulting, LLC [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired		$ 3,758
Finite-lived intangible assets, weighted average useful life		15 years
Tradename [Member] | DP Engineering Ltd, CO. [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired	$ 1,172
Finite-lived intangible assets, weighted average useful life	10 years
Tradename [Member] | True North Consulting, LLC [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired		$ 582
Finite-lived intangible assets, weighted average useful life		10 years
Non-compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired			$ 728
Non-compete Agreements [Member] | DP Engineering Ltd, CO. [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired	$ 728
Finite-lived intangible assets, weighted average useful life	5 years
Non-compete Agreements [Member] | True North Consulting, LLC [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired		$ 221
Finite-lived intangible assets, weighted average useful life		4 years
Alliance Agreements [Member] | True North Consulting, LLC [Member]
Acquired Finite-Lived Intangible Assets [Abstract]
Finite-lived intangible assets acquired		$ 527
Finite-lived intangible assets, weighted average useful life		5 years