Subsequent Events (Details) (USD $)	1 Months Ended
	Dec. 30, 2011	Nov. 30, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011
Subsequent Event [Line Items]
Stock split		2
Stock dividend, percentage		100.00%
Cash dividend paid per share			$ 0.22	$ 0.22	$ 0.22
Cash dividend paid per share, post-split		$ 0.11
Payment date	Dec. 30, 2011
Two-for-one Stock Split [Member]
Subsequent Event [Line Items]
Stock split		2
Stock dividend, percentage		100.00%
Record date		Nov. 29, 2011
Payment date		Dec. 15, 2011
Dividend Declared [Member]
Subsequent Event [Line Items]
Cash dividend paid per share		$ 0.22
Cash dividend paid per share, post-split		$ 0.11
Payment date		Dec. 30, 2011