|
Earnings Per Share (Schedule of Calculation of Basic and Diluted Earnings Per Common Share) (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
|
|
| Earnings Per Share [Line Items] | ||||
| Net income | $ 53,567 | $ 55,175 | $ 56,785 | $ 73,824 |
| Less portion allocated to nonvested shares | 1,185 | 1,178 | 1,214 | 1,558 |
| Net income allocated to common shares | $ 52,382 | $ 53,997 | $ 55,571 | $ 72,266 |
| Weighted average common shares outstanding | 74,318 | 74,020 | 74,309 | 74,012 |
| Basic and diluted earnings per common share | $ 0.70 | $ 0.73 | $ 0.75 | $ 0.98 |
| Shares excluded due to being anti-dilutive (weighted-average) | 1,913 | 1,683 | 1,839 | 1,699 |
| X | ||||||||||
|
- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. No definition available.
|
| X | ||||||||||
|
- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
NetIncome Loss Attributable To Nonvested Shares No definition available.
|