Shareholders' Equity Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			12 Months Ended				12 Months Ended		1 Months Ended		12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Maximum	Dec. 31, 2000 Stockholder Rights Plan [Member]	Apr. 30, 2010 Stockholder Rights Plan [Member]	Apr. 30, 2010 Stockholder Rights Plan [Member] Maximum	Apr. 30, 2010 Stockholder Rights Plan [Member] Minimum	Dec. 31, 2013 Fuji Heavy Industries Ltd. [Member]	Dec. 31, 2013 Directors Plan
Stockholders Equity Note [Line Items]
Maximum shares authorized for issuance													500,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased							75,000,000
Cash dividends declared, per share	$ 0.48			$ 1.68	$ 1.48	$ 0.90
Repurchase and retirement of common stock				$ 530,033	$ 127,525	$ 132,372						$ 497,474
Repurchase and retirement of common stock, shares				4,337,000	1,649,000	2,608,000						3,960,000
Shares remaining available for repurchases		1,604,000		1,604,000
Cash dividend paid during period, per share		$ 0.42	$ 0.37	$ 1.68	$ 1.48
Common stock excluded from calculation of diluted earnings per share				23,000	872,000	131,000
Minimum Percentage Of Ownership Acquired Or To Be Acquired Upon Which Purchase Rights Become Exercisable								15.00%
Common Stock Dividends Right Per Share Declared								1
Dividends Payable, Date of Record								Jun. 01, 2000
Common Stock Price Per Share Under Rights Plan										$ 125	$ 75
Incentive Stock Purchase Rights Redemption Price Per Right									$ 0.01
Employee Stock Purchase Plan Number Of Shares Available For Issuance				3,000,000
Share Based Compensation Arrangements By Share Based Payment Award Percentage Of Market Price At Eligible Employees Granted Options To Purchase Shares				95.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans				1,241,000