Stock Split	9 Months Ended
Sep. 30, 2011
Stock Split [Abstract]
Stock Split	Stock Split. On April 21, 2011, our Board of Directors authorized a 5-for-4 forward stock split of our common stock to be effected in the form of a stock dividend of one share of common stock for every four shares of common stock outstanding on the record date. On May 5, 2011, we completed the forward stock split through a stock dividend to shareholders of record as of May 2, 2011. The Board of Directors also made corresponding adjustments to the number of shares subject to, and the exercise price of, outstanding options and other rights to acquire shares of common stock. All earnings per common share and common share data set forth in the foregoing consolidated financial statements (and condensed notes thereto) have been adjusted to reflect the split.

Stock Split. On April 21, 2011, our Board of Directors authorized a 5-for-4 forward stock split of our common stock to be effected in the form of a stock dividend of one share of common stock for every four shares of common stock outstanding on the record date. On May 5, 2011, we completed the forward stock split through a stock dividend to shareholders of record as of May 2, 2011. The Board of Directors also made corresponding adjustments to the number of shares subject to, and the exercise price of, outstanding options and other rights to acquire shares of common stock. All earnings per common share and common share data set forth in the foregoing consolidated financial statements (and condensed notes thereto) have been adjusted to reflect the split.