Capital Stock (Details) $ / shares in Units, $ in Thousands						3 Months Ended		12 Months Ended
	May. 05, 2016 $ / shares	Mar. 24, 2016 USD ($) $ / shares	Apr. 28, 2015 $ / shares shares	Apr. 09, 2015 USD ($) $ / shares	Mar. 05, 2015 $ / shares	Mar. 31, 2016 USD ($) $ / shares shares	Mar. 29, 2015 $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Feb. 24, 2016 USD ($)	Oct. 13, 2014 USD ($)	Dec. 31, 2012 $ / shares shares
Class of Stock [Line Items]
Treasury stock (shares)						7,911,675		7,670,216
Preferred stock authorized (shares)						40,000,000		40,000,000
Preferred stock par value (usd per share) | $ / shares						$ 0.001		$ 0.001
Shares authorized (shares) | $										$ 400,000
Treasury stock acquired (shares)						341,548		6,569,056
Common stock repurchases | $						$ 12,739		$ 332,000
Share price (usd per share) | $ / shares						$ 37.30		$ 50.59
Treasury stock acquired not yet settled (shares)						100,089		125,566
Treasury stock acquired, not yet settled | $						$ 4,000		$ 8,000
Remaining authorized repurchase amount | $						$ 387,000
Special Cash Dividend
Class of Stock [Line Items]
Dividends declared per common share (usd per share) | $ / shares					$ 6.73	$ 0.00	$ 6.73
Common stock dividends (USD per share) | $ / shares				$ 6.73
Cash dividends | $				$ 649,000
Regular Cash Dividend
Class of Stock [Line Items]
Dividends declared per common share (usd per share) | $ / shares						$ 0.25	$ 0.00
Common stock dividends (USD per share) | $ / shares		$ 0.25
Cash dividends | $		$ 23,000
Regular Cash Dividend | Subsequent Event
Class of Stock [Line Items]
Dividends declared per common share (usd per share) | $ / shares	$ 0.25
Class A Common Stock
Class of Stock [Line Items]
Number of shares of common stock issued (shares)						100,334,466		100,015,546			78,754,269
Common stock, par value (usd per share) | $ / shares						$ 0.001		$ 0.001			$ 0.001
Common stock, conversion ratio						1
Number of new shares issued from conversion						0	46,123
Number of shares called by each warrant											1
Number of warrants exercised						100,108	421,643
Number of shares received						100,108	421,643
Common stock, authorized (shares)						1,000,000,000		1,000,000,000
Shares sold			9,240,073
Shares issued (usd per share) | $ / shares			$ 56.00
Shares authorized (shares) | $									$ 400,000
Class B Common Stock
Class of Stock [Line Items]
Number of shares of common stock issued (shares)						5,605		5,605			4,455,767
Common stock, par value (usd per share) | $ / shares						$ 0.001		$ 0.001			$ 0.001
Common stock, conversion ratio						1
Number of shares converted						0	46,123
Number of shares called by each warrant											1
Number of warrants exercised						0
Common stock, authorized (shares)						1,000,000,000		1,000,000,000
Preferred Stock
Class of Stock [Line Items]
Preferred stock authorized (shares)						40,000,000
Warrant
Class of Stock [Line Items]
Warrants issued						191,201					16,789,972
Warrant, exercise price, per share | $ / shares											$ 0.001