Earnings Per Common Share (Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share Reconciliation [Abstract]
Net income	$ 216,323	$ 221,004
Less: Preferred stock dividends	4,163	4,163
Earnings applicable to common stockholders	212,160	216,841
Net income available to common stockholders	212,160	216,841
Less: (Loss) earnings allocated to participating securities, basic	2,101	1,845
Less: (Loss) earnings allocated to participating securities, diluted	2,101	1,845
Earnings applicable to common stockholders	210,059	214,996
Earnings applicable to common stockholders	$ 210,059	$ 214,996
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - basic (in shares)	170,445	172,766
Effect of dilutive securities (in shares)	259	117
Weighted-average common shares outstanding - diluted (in shares)	170,704	172,883
Earnings Per Share, Basic and Diluted [Abstract]
Basic (loss) earnings per common share (in dollars per share)	$ 1.23	$ 1.24
Diluted (loss) earnings per common share (in shares)	$ 1.23	$ 1.24

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482689/260-10-45-60B