Goodwill And Intangible Assets (Narrative) (Details) - USD ($)		12 Months Ended
	Jul. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Goodwill and Intangible Assets [Line Items]
Indicators of impairment	$ 0
Amortization of intangible assets		$ 10,423,000	$ 12,366,000	$ 12,131,000
Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets		7 years 6 months
Trade Name [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets		11 years 3 months 18 days
Non-Compete Agreements [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets		2 years 9 months 18 days