Stockholders' Equity - Share-based Compensation Plans (Detail)		12 Months Ended				1 Months Ended
	Dec. 31, 2013 plans	Dec. 31, 2013 2012 Plan	Dec. 31, 2013 2012 Plan Min	Dec. 31, 2013 2012 Plan Max	Dec. 31, 2013 2005 Officer's Stock Plan	Nov. 30, 2005 2005 Officer's Stock Plan Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Share-based employee compensation plans, number	3
Shares of incentive and nonstatutory stock options provided for issuance		25,000,000			120,000,000
Shares reserved for issuance increase date range			Jan. 01, 2013	Jan. 01, 2022
Shares reserved for issuance increase percentage		2.50%
Share-based compensation arrangement by share-based payment award, expiration period		10 years
Share-based compensation arrangement by share-based payment award, expiration period for plan		10 years			10 years
Non statutory stock option issued to CEO to purchase shares of Class B common stock						120,000,000
Shares reserved for future issuance					0