Common Stock Common Stock (Related Party Transactions) (Details) - USD ($) $ / shares in Units, $ in Millions					12 Months Ended
	Nov. 18, 2016	May 18, 2016	Apr. 20, 2016	Oct. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 02, 2016	Jul. 20, 2016	May 24, 2014
Conversion of Stock [Line Items]
trading window				3 days
Share Price					$ 24.36	$ 13.82
Common Stock, Conversion Basis					one-for-one	One-for-one	One-for-one
Cactus VPF Contract [Member]
Conversion of Stock [Line Items]
Related Party Transaction, Description of Transaction				Under the Cactus VPF contract, Cactus Holding I was required to deliver to Citigroup Global Markets Inc. ("CGMI") a variable amount of stock or cash
Related Party Transaction, Amounts of Transaction				$ 48.3
Cactus VPF Contract [Member] | Class B Common Stock [Member]
Conversion of Stock [Line Items]
Number Securities Pledged				3,300,000
Amended M Capital I VPF Contract [Member]
Conversion of Stock [Line Items]
Related Party Transaction, Description of Transaction				Under the Amended M Capital II VPF contract, M Capital II was required to deliver to Citibank N.A. a variable amount of stock or cash
Related Party Transaction, Amounts of Transaction				$ 18.5
trading window				3 days
Amended M Capital I VPF Contract [Member] | Class A Common Stock [Member]
Conversion of Stock [Line Items]
Shares collateralized					2,000,000
Amended M Capital I VPF Contract [Member] | Class B Common Stock [Member]
Conversion of Stock [Line Items]
Number Securities Pledged				13,700,000
Shares collateralized					34,300,000
Amended M Capital II VPF Contract [Member]
Conversion of Stock [Line Items]
Related Party Transaction, Description of Transaction		shares of Class A common stock. The new VPF required M Capital II to deliver a variable amount of Class A common stock, up to a maximum of approximately
Shares collateralized		12,300,000
Amended M Capital II VPF Contract [Member] | Class B Common Stock [Member]
Conversion of Stock [Line Items]
Number Securities Pledged		12,300,000
Amended Cactus I VPF Contract [Member]
Conversion of Stock [Line Items]
Related Party Transaction, Description of Transaction	On November 18, 2016, the maturity dates of the M Capital II VPFs were extended to December 5, 2017 through January 3, 2018, and the maturity dates of the Cactus Holding I VPFs were extended to December 5, 2017 through December 7, 2017.	shares of Class A common stock. The new VPF required Cactus Holding I to deliver a variable amount of Class A common stock, up to a maximum of approximately
Additional shares collateralized	0
Shares collateralized		7,000,000
Amended Cactus I VPF Contract [Member] | Class A Common Stock [Member]
Conversion of Stock [Line Items]
Number Securities Pledged		7,000,000
Previous M Capital VPF Contract [Member]
Conversion of Stock [Line Items]
Number Securities Pledged										4,100,000
Number of Additional Securities Pledged											1,900,000
Previous M Capital VPF Contract [Member] | Class A Common Stock [Member]
Conversion of Stock [Line Items]
Number Securities Pledged		2,000,000								1,900,000
Conversion of Stock, Shares Converted									6,600,000
Shares sold by Moyes Affiliates								4,800,000
Stock Issued During Period, Shares, Conversion of Convertible Securities								1,100,000
Previous M Capital VPF Contract [Member] | Class B Common Stock [Member]
Conversion of Stock [Line Items]
Number Securities Pledged		5,100,000							12,000,000	2,200,000		6,800,000
National Hockey League Agreement [Member]
Conversion of Stock [Line Items]
Related Party Transaction, Description of Transaction			On April 20, 2016, Mr. Moyes entered into a settlement agreement with the National Hockey League ("NHL") relating to a previously disclosed lawsuit between the NHL and Mr. Moyes. As part of the settlement agreement, certain of Mr. Moyes’ adult children entered into a Non-Recourse Guaranty and Pledge Agreement with the NHL pursuant to which they guaranteed certain obligations of Mr. Moyes and certain Moyes Affiliates to the NHL. The guarantor’s obligations are collateralized by
National Hockey League Agreement [Member] | Class B Common Stock [Member]
Conversion of Stock [Line Items]
Number Securities Pledged					2,000,000
Maximum [Member] | Amended M Capital II VPF Contract [Member]
Conversion of Stock [Line Items]
Shares collateralized		12,300,000
Maximum [Member] | Amended Cactus I VPF Contract [Member]
Conversion of Stock [Line Items]
Shares collateralized		7,000,000
Common Stock [Member]
Conversion of Stock [Line Items]
Stock Issued During Period, Shares, Conversion of Convertible Securities						0
Common Stock [Member] | Class A Common Stock [Member]
Conversion of Stock [Line Items]
Stock Issued During Period, Shares, Conversion of Convertible Securities					1,250,000		1,450,000
Common Stock [Member] | Class B Common Stock [Member]
Conversion of Stock [Line Items]
Stock Issued During Period, Shares, Conversion of Convertible Securities					(1,250,000)		(1,450,000)