Goodwill And Intangible Assets (Narrative) (Details) - USD ($)		3 Months Ended
	Jul. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Schedule of Goodwill and Intangible Assets [Line Items]
Indicators of impairment	$ 0
Amortization of intangible assets		$ 2,974,000	$ 1,942,000
Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets		7 years 10 months 24 days
Trade Name [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets		10 years 4 months 24 days
Non-Compete Agreements [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets		4 years 7 months 6 days
Backlog [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets		9 months