Acquisition of Gordon Trucking, Inc. Total Purchase Price Consideration (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2013	Nov. 01, 2016	Nov. 01, 2015	Nov. 11, 2013
Business Acquisition [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 175,000	$ 200,000	$ 250,000
Payments to Acquire Businesses, Gross	$ 115,900
Payments to Acquire Intangible Assets	15,000
Cash Acquired from Acquisition	(20,000)
Business Combination, Acquisition Related Costs	$ 148,000
Common stock issued (par value of $0.01)	41,100
Total acquisition purchase price	$ 300,000
Gordon Trucking Company, Inc [Member]
Business Acquisition [Line Items]
Total consideration transferred to acquire a business	172,000
Total acquisition purchase price	$ 285,000