Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Building [Member]	Dec. 31, 2012 1.75% Senior Convertible Notes due 2017 [Member]	Mar. 06, 2012 1.75% Senior Convertible Notes due 2017 [Member]
Schedule Of Significant Accounting Policies [Line Items]
Aggregate principal amount of debt issued		$ 300,000	$ 300,000
Senior convertible note, maturity year		2017
Senior convertible note, stated interest rate		1.75%
Estimated useful life of Building	39 years