|
Subsequent Events - Additional Information (Detail) (USD $)
|
3 Months Ended | 6 Months Ended | 1 Months Ended | |||
|---|---|---|---|---|---|---|
|
Jun. 30, 2013
|
Mar. 31, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jul. 29, 2013
Subsequent Event [Member]
|
|
| Subsequent Event [Line Items] | ||||||
| Dividend declared per common share | $ 0.30 | $ 0.30 | $ 0.30 | $ 0.60 | $ 0.60 | $ 0.30 |
| Dividend declaration date | Apr. 29, 2013 | Feb. 19, 2013 | Jul. 29, 2013 | |||
| Dividend payment date | May 28, 2013 | Mar. 19, 2013 | Aug. 27, 2013 | |||
| Dividend date of record | Aug. 13, 2013 | |||||
| X | ||||||||||
|
- Definition
Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Date the declared dividend will be paid, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Date the dividend to be paid was declared, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. No definition available.
|
| X | ||||||||||
|
- Details
|