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Earnings Per Common Share (Basic and Diluted Earnings Per Common Share) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Earnings Per Share [Abstract] |  |  |
Net income | $ 443,599 | $ 454,918 | $ 364,149
Less: Preferred stock dividends | 8,063 | 8,063 | 8,063
Net income available to common shareholders | 435,536 | 446,855 | 356,086
Less: Earnings allocated to participating securities | 3,687 | 3,169 | 2,016
Distributed earnings allocated to common stock | 175,540 | 164,268 | 143,356
Undistributed earnings allocated to common stock | 256,309 | 279,418 | 210,714
Net earnings allocated to common stock | $ 431,849 | $ 443,686 | $ 354,070
Weighted-average shares outstanding for basic earnings per common share | 62,741,769 | 63,704,508 | 63,693,927
Dilutive effect of stock compensation | 700,101 | 982,208 | 968,161
Weighted-average shares outstanding for diluted earnings per common share | 63,441,870 | 64,686,716 | 64,662,088

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- Definition The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 66 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e2814-109256 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -URI http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e2740-109256 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60A -URI http://asc.fasb.org/extlink&oid=117326831&loc=SL5780132-109256 + Details
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