|
Dividends (Parenthetical) (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2012
Restricted Stock Units (RSUs)
|
Dec. 31, 2011
Restricted Stock Units (RSUs)
|
Dec. 31, 2010
Restricted Stock Units (RSUs)
|
|
| Dividend Declared [Line Items] | ||||
| Dividends related to outstanding restricted stock units | $ 894 | $ 684 | $ 635 | |
| Effective Date of change in amount of quarterly dividend | Nov. 02, 2010 | |||
| Revised quarterly dividend | $ 0.21 | |||
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of dividends accrued on unvested restricted stock units to be paid upon vesting. No definition available.
|
| X | ||||||||||
|
- Definition
The date on which the company's board of directors raised its quarterly dividend. No definition available.
|
| X | ||||||||||
|
- Definition
Amount of revised quarterly dividend per common share. No definition available.
|