Subsequent Events (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	0 Months Ended
	Mar. 29, 2015	Apr. 09, 2015	Apr. 28, 2015	Apr. 22, 2015
Subsequent Event [Line Items]
Special Cash Dividend on Common Stock and Warrantholder payment	$ 648,644
Subsequent Event
Subsequent Event [Line Items]
Special Cash Dividend on Common Stock and Warrantholder payment		$ 649,000
Class A Common Stock | Subsequent Event
Subsequent Event [Line Items]
Shares Registered For Public Offering, Including Existing Shareholders				9,240,073
Shares Sold During Public Offering, Including Existing Shareholders			9,240,073
Common Stock, Par or Stated Value Per Share			$ 56.00
Over-Allotment Option | Class A Common Stock | Subsequent Event
Subsequent Event [Line Items]
Shares Registered For Public Offering, Including Existing Shareholders				1,386,010