Net earnings allocated to restricted stock.

No definition available.

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (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.

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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-Glossary Other Comprehensive Income

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- Definition

Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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- Definition

Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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Earnings Per Share Reconciliation - Schedule of Earnings Per Common Share Reconciliation (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings per common share:
Net earnings	$ 25,581us-gaap_NetIncomeLoss	$ 24,295us-gaap_NetIncomeLoss	$ (25,484)us-gaap_NetIncomeLoss	$ 28,661us-gaap_NetIncomeLoss	$ 25,288us-gaap_NetIncomeLoss	$ 24,239us-gaap_NetIncomeLoss	$ 24,466us-gaap_NetIncomeLoss	$ 21,615us-gaap_NetIncomeLoss	$ 104,021us-gaap_NetIncomeLoss	$ 95,608us-gaap_NetIncomeLoss	$ 77,280us-gaap_NetIncomeLoss
Less: Net earnings allocated to restricted stock									544	298	247
Net earnings allocated to common shareholders									103,477	95,310	77,033
Weighted average shares outstanding									105,239	104,729	104,419
Basic earnings per common share	$ 0.24us-gaap_EarningsPerShareBasic	$ 0.23us-gaap_EarningsPerShareBasic	$ 0.24us-gaap_EarningsPerShareBasic	$ 0.27us-gaap_EarningsPerShareBasic	$ 0.24us-gaap_EarningsPerShareBasic	$ 0.23us-gaap_EarningsPerShareBasic	$ 0.23us-gaap_EarningsPerShareBasic	$ 0.21us-gaap_EarningsPerShareBasic	$ 0.98us-gaap_EarningsPerShareBasic	$ 0.91us-gaap_EarningsPerShareBasic	$ 0.74us-gaap_EarningsPerShareBasic
Diluted earnings per common share:
Net income allocated to common shareholders									$ 103,477	$ 95,310	$ 77,033
Weighted average shares outstanding									105,239	104,729	104,419
Incremental shares from assumed exercise of outstanding options									520	397	239
Diluted weighted average shares outstanding									105,759	105,126	104,658
Diluted earnings per common share	$ 0.24us-gaap_EarningsPerShareDiluted	$ 0.23us-gaap_EarningsPerShareDiluted	$ 0.24us-gaap_EarningsPerShareDiluted	$ 0.27us-gaap_EarningsPerShareDiluted	$ 0.24us-gaap_EarningsPerShareDiluted	$ 0.23us-gaap_EarningsPerShareDiluted	$ 0.23us-gaap_EarningsPerShareDiluted	$ 0.21us-gaap_EarningsPerShareDiluted	$ 0.98us-gaap_EarningsPerShareDiluted	$ 0.91us-gaap_EarningsPerShareDiluted	$ 0.74us-gaap_EarningsPerShareDiluted