Customers Bancorp (CUBI) 10-Q 9 May 24 2024 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2024	May 06, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-35542
Entity Registrant Name	Customers Bancorp, Inc.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	27-2290659
Entity Address, Address Line One	701 Reading Avenue
Entity Address, City or Town	West Reading
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19611
City Area Code	610
Local Phone Number	933-2000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		31,652,021
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001488813
Current Fiscal Year End Date	--12-31
Voting Common Stock, par value $1.00 per share
Entity Information [Line Items]
Title of 12(b) Security	Voting Common Stock, par value $1.00 per share
Trading Symbol	CUBI
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series E, par value $1.00 per share
Trading Symbol	CUBI/PE
Security Exchange Name	NYSE
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share
Entity Information [Line Items]
Title of 12(b) Security	Fixed-to-Floating Rate Non-Cumulative PerpetualPreferred Stock, Series F, par value $1.00 per share
Trading Symbol	CUBI/PF
Security Exchange Name	NYSE
5.375% Subordinated Notes due 2034
Entity Information [Line Items]
Title of 12(b) Security	5.375% Subordinated Notes due 2034
Trading Symbol	CUBB
Security Exchange Name	NYSE

Consolidated Balance Sheet _ Un

Consolidated Balance Sheet — Unaudited - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks	$ 51,974	$ 45,210
Interest earning deposits	3,649,146	3,801,136
Cash and cash equivalents	3,701,120	3,846,346
Investment securities, at fair value (includes allowance for credit losses of $5,069 and $3,952, respectively)	2,604,868	2,405,640
Investment securities held to maturity	1,032,037	1,103,170
Loans held for sale (includes $219,885 and $189,277, respectively, at fair value)	357,640	340,317
Loans and leases receivable	11,936,621	11,963,855
Loans receivable, mortgage finance, at fair value	962,610	897,912
Allowance for credit losses on loans and leases	(133,296)	(135,311)
Total loans and leases receivable, net of allowance for credit losses on loans and leases	12,765,935	12,726,456
FHLB, Federal Reserve Bank, and other restricted stock	100,067	109,548
Accrued interest receivable	120,123	114,766
Bank premises and equipment, net	7,253	7,371
Bank-owned life insurance	293,400	292,193
Goodwill and other intangibles	3,629	3,629
Other assets	361,295	366,829
Total assets	21,347,367	21,316,265
Deposits:
Demand, non-interest bearing	4,688,880	4,422,494
Interest bearing	13,272,503	13,497,742
Total deposits	17,961,383	17,920,236
FHLB advances	1,195,088	1,203,207
Other borrowings	123,905	123,840
Subordinated debt	182,300	182,230
Accrued interest payable and other liabilities	193,074	248,358
Total liabilities	19,655,750	19,677,871
Commitments and contingencies (NOTE 15)
Shareholders’ equity:
Preferred stock, par value $1.00 per share; liquidation preference $25.00 per share; 100,000,000 shares authorized, 5,700,000 shares issued and outstanding as of March 31, 2024 and December 31, 2023	137,794	137,794
Common stock, par value $1.00 per share; 200,000,000 shares authorized; 35,540,367 and 35,459,342 shares issued as of March 31, 2024 and December 31, 2023; 31,521,931 and 31,440,906 shares outstanding as of March 31, 2024 and December 31, 2023	35,540	35,459
Additional paid in capital	567,490	564,538
Retained earnings	1,205,508	1,159,582
Accumulated other comprehensive income (loss), net	(132,305)	(136,569)
Treasury stock, at cost (4,018,436 shares as of March 31, 2024 and December 31, 2023)	(122,410)	(122,410)
Total shareholders’ equity	1,691,617	1,638,394
Total liabilities and shareholders’ equity	$ 21,347,367	$ 21,316,265
Treasury stock (shares)	4,018,436	4,018,436

Consolidated Balance Sheet _ _2

Consolidated Balance Sheet — Unaudited (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Allowance for credit losses, available for sale securities	$ 5,069	$ 3,952
Loans held for sale at fair value	$ 219,885	$ 189,277
Preferred stock, par value (usd per share)	$ 1	$ 1
Preferred stock, liquidation preference (usd per share)	$ 25	$ 25
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, shares issued (shares)	5,700,000	5,700,000
Preferred stock, shares outstanding (shares)	5,700,000	5,700,000
Common stock, par value (usd per share)	$ 1	$ 1
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock, shares issued (shares)	35,540,367	35,459,342
Common stock, shares outstanding (shares)	31,521,931	31,440,906
Treasury stock (shares)	4,018,436	4,018,436

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) — Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income:
Loans and leases	$ 217,999	$ 244,212
Investment securities	46,802	47,316
Interest earning deposits	52,817	10,395
Loans held for sale	12,048	11,701
Other	2,111	1,321
Total interest income	331,777	314,945
Interest expense:
Deposits	153,725	143,930
FHLB advances	13,485	10,370
FRB advances	0	6,286
Subordinated debt	2,689	2,689
Other borrowings	1,493	1,771
Total interest expense	171,392	165,046
Net interest income	160,385	149,899
Provision for credit losses	17,070	19,603
Net interest income after provision for credit losses	143,315	130,296
Non-interest income:
Commercial lease income	9,683	9,326
Loan fees	5,280	3,990
Bank-owned life insurance	3,261	2,647
Mortgage finance transactional fees	946	1,074
Gain (loss) on sale of loans	10	0
Net gain (loss) on sale of investment securities	(30)	0
Other	2,081	1,084
Total non-interest income	21,231	18,121
Non-interest expense:
Salaries and employee benefits	36,025	32,345
Technology, communication and bank operations	21,904	16,589
Commercial lease depreciation	7,970	7,875
Professional services	6,353	7,596
Loan servicing	4,031	4,661
Occupancy	2,347	2,760
FDIC assessments, non-income taxes and regulatory fees	13,469	2,728
Advertising and promotion	682	1,049
Other	6,388	4,530
Total non-interest expense	99,169	80,133
Income before income tax expense	65,377	68,284
Income tax expense	15,651	14,563
Net income	49,726	53,721
Preferred stock dividends	3,800	3,456
Net income available to common shareholders, basic	45,926	50,265
Net income available to common shareholders, diluted	$ 45,926	$ 50,265
Basic earnings per common share (usd per share)	$ 1.46	$ 1.58
Diluted earnings per common share (usd per share)	$ 1.40	$ 1.55

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) — Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 49,726	$ 53,721
Unrealized gains (losses) on available for sale debt securities:
Unrealized gains (losses) arising during the period	4,480	8,270
Income tax effect	(1,138)	(2,101)
Reclassification adjustments for (gains) losses included in net income	30	0
Income tax effect	(8)	0
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity	1,206	872
Income tax effect	(306)	(221)
Net unrealized gains (losses) on available for sale debt securities	4,264	6,820
Other comprehensive income (loss), net of income tax effect	4,264	6,820
Comprehensive income (loss)	$ 53,990	$ 60,541

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity — Unaudited - USD ($) $ in Thousands		Total	Preferred Stock	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance, preferred stock (shares) at Dec. 31, 2022			5,700,000
Beginning balance at Dec. 31, 2022		$ 1,402,961	$ 137,794	$ 35,012	$ 551,721	$ 924,134	$ (163,096)	$ (82,604)
Beginning balance, common stock (shares) at Dec. 31, 2022				32,373,697
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		53,721				53,721
Other comprehensive income (loss)		6,820					6,820
Preferred stock dividends	[1]	(3,456)				(3,456)
Share-based compensation expense		2,980			2,980
Issuance of common stock under share-based compensation arrangements (shares)				245,936
Issuance of common stock under share-based compensation arrangements		(2,200)		$ 246	(2,446)
Repurchase of common shares (in shares)				(1,379,883)
Repurchase of common shares		(39,806)						(39,806)
Ending balance, preferred stock (shares) at Mar. 31, 2023			5,700,000
Ending balance at Mar. 31, 2023		$ 1,421,020	$ 137,794	$ 35,258	552,255	974,399	(156,276)	(122,410)
Ending balance, common stock (shares) at Mar. 31, 2023				31,239,750
Beginning balance, preferred stock (shares) at Dec. 31, 2023		5,700,000	5,700,000
Beginning balance at Dec. 31, 2023		$ 1,638,394	$ 137,794	$ 35,459	564,538	1,159,582	(136,569)	(122,410)
Beginning balance, common stock (shares) at Dec. 31, 2023		31,440,906		31,440,906
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 49,726				49,726
Other comprehensive income (loss)		4,264					4,264
Preferred stock dividends	[1]	(3,800)				(3,800)
Share-based compensation expense		3,976			3,976
Issuance of common stock under share-based compensation arrangements (shares)				81,025
Issuance of common stock under share-based compensation arrangements		$ (943)		$ 81	(1,024)
Ending balance, preferred stock (shares) at Mar. 31, 2024		5,700,000	5,700,000
Ending balance at Mar. 31, 2024		$ 1,691,617	$ 137,794	$ 35,540	$ 567,490	$ 1,205,508	$ (132,305)	$ (122,410)
Ending balance, common stock (shares) at Mar. 31, 2024		31,521,931		31,521,931
[1] Dividends per share of $0.681630 and $0.657743 were declared on Series E and F preferred stock, respectively, for the three months ended March 31, 2024. Dividends per share of $0.619313 and $0.595688 were declared on Series E and F preferred stock, respectively, for the three months ended March 31, 2023.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity — Unaudited (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Series E Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.681630	$ 0.619313
Series F Preferred Stock
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.657743	$ 0.595688

Consolidated Statements of Cash

Consolidated Statements of Cash Flows — Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities
Net income from continuing operations	$ 49,726	$ 53,721
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	17,070	19,603
Depreciation and amortization	8,246	8,833
Share-based compensation expense	3,890	3,005
Deferred taxes	(276)	18,656
Net amortization (accretion) of investment securities premiums and discounts	(2,286)	(2,682)
Unrealized (gain) loss on investment securities	45	(62)
Net (gain) loss on sale of investment securities	30	0
Impairment loss on fixed assets and leases	0	109
Unrealized (gain) loss on derivatives	(661)	52
Settlement of terminated fair value hedge derivatives	0	4,630
(Gain) loss on sale of loans	(68)	0
Origination and purchases of loans held for sale	(340,536)	(185,919)
Proceeds from the sales and repayments of loans held for sale	322,413	106,146
Amortization (accretion) of loan net deferred fees, discounts and premiums	(7,367)	(23,039)
Earnings on investment in bank-owned life insurance	(3,261)	(2,647)
(Increase) decrease in accrued interest receivable and other assets	(10,576)	(932)
Increase (decrease) in accrued interest payable and other liabilities	(55,207)	18,064
Net Cash Provided By (Used In) Operating Activities	(18,818)	17,538
Cash Flows from Investing Activities
Proceeds from maturities, calls and principal repayments of investment securities available for sale	113,323	69,648
Proceeds from maturities, calls and principal repayments of investment securities held to maturity	72,327	44,213
Proceeds from sales of investment securities available for sale	21,970	0
Purchases of investment securities available for sale	(328,905)	0
Purchases of investment securities held to maturity	0	(73,074)
Origination of mortgage finance loans	(4,936,887)	(4,702,988)
Proceeds from repayments of mortgage finance loans	4,880,422	4,794,683
Net (increase) decrease in loans and leases, excluding mortgage finance loans	16,634	736,616
Purchases of loans	(7,403)	(12,550)
Proceeds from bank-owned life insurance	176	727
Net proceeds from sale of FHLB, Federal Reserve Bank, and other restricted stock	9,481
Net purchases from sale of FHLB, Federal Reserve Bank, and other restricted stock		(50,537)
Purchases of bank premises and equipment	(418)	(130)
Proceeds from sale of other real estate owned	33	0
Proceeds from sales of leased assets under lessor operating leases	94	113
Purchases of leased assets under lessor operating leases	(4,007)	(2,076)
Net Cash Provided By (Used In) Investing Activities	(163,160)	804,645
Cash Flows from Financing Activities
Net increase (decrease) in deposits	41,501	(435,823)
Net increase (decrease) in short-term borrowed funds from FHLB	0	(300,000)
Proceeds from long-term borrowed funds from FHLB and FRB	0	2,565,000
Repayments of long-term borrowed funds from FHLB and FRB	0	(1,015,000)
Preferred stock dividends paid	(3,804)	(3,450)
Purchase of treasury stock	0	(39,806)
Payments of employee taxes withheld from share-based awards	(1,426)	(2,280)
Proceeds from issuance of common stock	481	55
Net Cash Provided By (Used In) Financing Activities	36,752	768,696
Net Increase (Decrease) in Cash and Cash Equivalents	(145,226)	1,590,879
Cash and Cash Equivalents – Beginning	3,846,346	455,806
Cash and Cash Equivalents – Ending	3,701,120	2,046,685
Non-cash Investing and Financing Activities:
Transfer of loans held for investment to held for sale	0	16,000
Transfer of loans held for sale to held for investment	$ 858	$ 0

Description of the Business

Description of the Business	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	DESCRIPTION OF THE BUSINESS Customers Bancorp, Inc. (“Customers Bancorp”) is a bank holding company engaged in banking activities through its wholly owned subsidiary, Customers Bank (“the Bank”), collectively referred to as “Customers” herein. Customers Bancorp and its wholly owned subsidiaries, the Bank, and non-bank subsidiaries, serve businesses and residents in Berks County and Southeastern Pennsylvania (Bucks, Chester and Philadelphia Counties); New York (Westchester and Suffolk Counties, and Manhattan); Hamilton, New Jersey; Boston, Massachusetts; Providence, Rhode Island; Portsmouth, New Hampshire; Chicago, Illinois; Dallas, Texas; Wilmington, North Carolina; and nationally for certain loan and deposit products. The Bank has seven branches and provides commercial banking products, primarily loans and deposits. In addition, the Bank also administratively supports loan and other financial products, including equipment finance leases, to customers through its limited-purpose offices. The Bank also serves specialized businesses nationwide, including its mortgage finance loans, commercial equipment financing, SBA lending, specialized lending and consumer loans through relationships with fintech companies. The Bank is subject to regulation of the Pennsylvania Department of Banking and Securities and the Federal Reserve Bank and is periodically examined by those regulatory authorities.

Significant Accounting Policies

Significant Accounting Policies and Basis of Presentation	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Significant Accounting Policies and Basis of Presentation	SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION Basis of Presentation The interim unaudited consolidated financial statements have been prepared in conformity with U.S. GAAP and pursuant to the rules and regulations of the SEC. These interim unaudited consolidated financial statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present a fair statement of the financial position and the results of operations and cash flows of Customers Bancorp and subsidiaries for the interim periods presented. Certain information and footnote disclosures normally included in the annual consolidated financial statements have been omitted from these interim unaudited consolidated financial statements as permitted by SEC rules and regulations. The December 31, 2023 consolidated balance sheet presented in this report has been derived from Customers Bancorp’s audited 2023 consolidated financial statements. Management believes that the disclosures are adequate to present fairly the consolidated financial statements as of the dates and for the periods presented. These interim unaudited consolidated financial statements should be read in conjunction with the 2023 consolidated financial statements of Customers Bancorp and subsidiaries included in Customers’ Annual Report on Form 10-K for the year ended December 31, 2023 filed with the SEC on February 29, 2024 (the “2023 Form 10-K”). The 2023 Form 10-K describes Customers Bancorp’s significant accounting policies. There have been no material changes to Customers Bancorp’s significant accounting policies noted above for the three months ended March 31, 2024. Recently Issued Accounting Standards Presented below are recently issued accounting standards that Customers has adopted as well as those that the FASB has issued but are not yet effective. Accounting Standards Adopted in 2024 Standard Summary of Guidance Effects on Financial Statements ASU 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions Issued June 2022 • Clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and not considered in measuring fair value. • Prohibits recognition and measurement of a contractual sale restriction on the sale of an equity security as a separate unit of account. • Provides disclosure requirements for the equity securities subject to contractual sale restrictions. • Effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been issued or made available for issuance. • Customers adopted this guidance on January 1, 2024. This guidance did not have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. ASU 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method Issued March 2023 • Provides an election to account for tax equity investments, regardless of the tax credit program, using the proportional amortization method provided that certain conditions are met. • Customers adopted this guidance on January 1, 2024. This guidance did not have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. Accounting Standards Issued But Not Yet Adopted Standard Summary of Guidance Effects on Financial Statements ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures Issued November 2023 • Requires a public entity, including a public entity that has a single reportable segment to disclose, on an annual and interim basis, all disclosures required by the amendments in this ASU and all existing disclosures in ASC 280. • Requires disclosures of significant segment expenses included within each reportable segment’s profit or loss that are regularly provided to the CODM, an amount for other segment items by reportable segment and a description of its composition, the title and position of the CODM and an explanation of how the CODM uses the reported measure of segment profit or loss. • Clarifies that more than one measure of a segment’s profit or loss may be reported if the CODM uses them in assessing segment performance and deciding how to allocate resources, provided that at least one of the reported segment profit or loss measure is consistent with the measurement principles used in measuring the corresponding amounts in the entity’s consolidated financial statements. • Effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. • Customers is currently evaluating the expected impact of this ASU on Customers’ consolidated financial statements. ASU 2023-08, Intangibles - Goodwill and Other - Crypto Assets (Subtopic 250-60) Issued December 2023 • Requires crypto assets meeting certain criteria to be subsequently measured at fair value with changes recognized in net income each reporting period. • Requires crypto assets measured at fair value to be presented separately from other intangible assets in the balance sheet and changes from the remeasurement of crypto assets separately from changes in the carrying amounts of other intangible assets in the income statement. • Requires cash receipts arising from crypto assets that are received as noncash consideration in the ordinary course of business and converted nearly immediately into cash as operating activities in the statement of cash flows. • Effective for fiscal years beginning after December 15, 2024, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been issued. • Customers does not expect this ASU to have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures Issued December 2023 • Requires public entities to disclose annually a tabular reconciliation of specific reconciling items, including those items exceeding five percent of the amount computed by multiplying income from continuing operations before income taxes by the statutory income tax rate, in the income tax rate reconciliation of the effective tax rate to the statutory tax rate. • Requires disclosures of income taxes paid, net of refunds received, disaggregated by federal, state and foreign taxes and by individual jurisdictions where income taxes paid is equal to or greater than five percent of total income taxes paid, net of refunds received. • Effective for fiscal years beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued. • Customers is currently evaluating the expected impact of this ASU on Customers’ consolidated financial statements.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	EARNINGS (LOSS) PER SHARE The following are the components and results of Customers’ earnings per common share calculations for the periods presented. Three Months Ended (amounts in thousands, except share and per share data) 2024 2023 Net income available to common shareholders $ 45,926 $ 50,265 Weighted-average number of common shares outstanding – basic 31,473,424 31,819,203 Share-based compensation plans 1,381,110 525,814 Weighted-average number of common shares – diluted 32,854,534 32,345,017 Basic earnings per common share $ 1.46 $ 1.58 Diluted earnings per common share 1.40 1.55 The following are securities that could potentially dilute basic earnings per common share in future periods that were not included in the computation of diluted earnings per common share because either the performance conditions for certain of the share-based compensation awards have not been met or to do so would have been anti-dilutive for the periods presented. Three Months Ended 2024 2023 Anti-dilutive securities: Share-based compensation awards 1,680 850,725

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) by Component	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss) by Component	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) BY COMPONENT The following tables present the changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2024 and 2023. Amounts in parentheses indicate reductions to AOCI. Unrealized Gains (Losses) on Available for Sale Securities (1) Three Months Ended March 31, (amounts in thousands) 2024 2023 Balance at January 1 $ (136,569) $ (163,096) Unrealized gains (losses) arising during period, before tax 4,480 8,270 Income tax effect (1,138) (2,101) Other comprehensive income (loss) before reclassifications 3,342 6,169 Reclassification adjustments for (gains) losses included in net income, before tax 30 — Income tax effect (8) — Amounts reclassified from accumulated other comprehensive income (loss) to net income 22 — Amortization of unrealized loss on securities transferred from available for sale to held to maturity 1,206 872 Income tax effect (306) (221) Amortization of unrealized loss on securities transferred from available for sale to held to maturity 900 651 Net current-period other comprehensive income (loss) 4,264 6,820 Balance at March 31 $ (132,305) $ (156,276) (1) Reclassification amounts for AFS debt securities are reported as gain (loss) on sale of investment securities and amortization of unrealized losses on debt securities transferred from available-for-sale to held-to-maturity is reported within interest income on the consolidated statements of income.

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES Investment securities at fair value The amortized cost, approximate fair value and allowance for credit losses of investment securities at fair value as of March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 62,274 $ (450) $ — $ (3,590) $ 58,234 Agency-guaranteed residential mortgage-backed securities 86,227 — 299 (114) 86,412 Agency-guaranteed residential collateralized mortgage obligations 138,573 — — (13,615) 124,958 Agency-guaranteed commercial collateralized mortgage obligations 34,573 — 73 (872) 33,774 Collateralized loan obligations 593,236 — 55 (8,796) 584,495 Commercial mortgage-backed securities 114,445 — — (1,819) 112,626 Corporate notes 668,459 (4,619) — (53,370) 610,470 Private label collateralized mortgage obligations 1,017,587 — 628 (58,045) 960,170 Available for sale debt securities $ 2,715,374 $ (5,069) $ 1,055 $ (140,221) 2,571,139 Equity securities (2) 33,729 Total investment securities, at fair value $ 2,604,868 December 31, 2023 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 97,359 $ (483) $ 15 $ (4,262) $ 92,629 Agency-guaranteed residential collateralized mortgage obligations 129,589 — — (12,681) 116,908 Collateralized loan obligations 500,109 — 1 (11,018) 489,092 Commercial mortgage-backed securities 125,885 — — (4,249) 121,636 Corporate notes 636,880 (3,469) 79 (50,456) 583,034 Private label collateralized mortgage obligations 1,034,841 — 1,201 (62,481) 973,561 Available for sale debt securities $ 2,524,663 $ (3,952) $ 1,296 $ (145,147) 2,376,860 Equity securities (2) 28,780 Total investment securities, at fair value $ 2,405,640 (1) Accrued interest on AFS debt securities totaled $19.5 million and $14.7 million at March 31, 2024 and December 31, 2023, respectively, and is included in accrued interest receivable on the consolidated balance sheet. (2) Includes perpetual preferred stock issued by domestic banks and domestic bank holding companies and equity securities issued by fintech companies, without a readily determinable fair value, and CRA-qualified mutual fund shares at March 31, 2024 and December 31, 2023. No impairments or measurement adjustments have been recorded on the equity securities without a readily determinable fair value since acquisition. Customers’ transactions with unconsolidated VIEs include sales of consumer installment loans and investments in the securities issued by the VIEs. Customers is not the primary beneficiary of the VIEs because Customers has no right to make decisions that will most significantly affect the economic performance of the VIEs. Customers’ continuing involvement with the unconsolidated VIEs is not significant. Customers’ continuing involvement is not considered to be significant where Customers only invests in securities issued by the VIE and was not involved in the design of the VIE or where Customers has transferred financial assets to the VIE for only cash consideration. Customers’ investments in the securities issued by the VIEs are classified as AFS or HTM debt securities on the consolidated balance sheets, and represent Customers' maximum exposure to loss. Proceeds from the sale of AFS debt securities were $22.0 million for the three months ended March 31, 2024. There were no sales of AFS debt securities for the three months ended March 31, 2023. The following table presents gross realized gains and realized losses from the sale of AFS debt securities for the three months ended March 31, 2024 and 2023: Three Months Ended March 31, (amounts in thousands) 2024 2023 Gross realized gains $ — $ — Gross realized losses (30) — Net realized gains (losses) on sale of available for sale debt securities $ (30) $ — These gains (losses) were determined using the specific identification method and were reported as net gain (loss) on sale of investment securities within non-interest income on the consolidated statements of income. The following table presents AFS debt securities by stated maturity. Debt securities backed by mortgages and other assets have expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and, therefore, these debt securities are classified separately with no specific maturity date: March 31, 2024 (amounts in thousands) Amortized Fair Due in one year or less $ 31,500 $ 26,852 Due after one year through five years 569,353 525,291 Due after five years through ten years 67,606 58,327 Asset-backed securities 62,274 58,234 Agency-guaranteed residential mortgage-backed securities 86,227 86,412 Agency-guaranteed residential collateralized mortgage obligations 138,573 124,958 Agency-guaranteed commercial collateralized mortgage obligations 34,573 33,774 Collateralized loan obligations 593,236 584,495 Commercial mortgage-backed securities 114,445 112,626 Private label collateralized mortgage obligations 1,017,587 960,170 Total available for sale debt securities $ 2,715,374 $ 2,571,139 Gross unrealized losses and fair value of Customers’ AFS debt securities for which an allowance for credit losses has not been recorded, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 Less Than 12 Months 12 Months or More Total (amounts in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale debt securities: Asset-backed securities $ — $ — $ 52,676 $ (3,261) $ 52,676 $ (3,261) Agency-guaranteed residential mortgage-backed securities 47,014 (114) — — 47,014 (114) Agency-guaranteed residential collateralized mortgage obligations 12,283 (105) 112,675 (13,510) 124,958 (13,615) Agency-guaranteed commercial collateralized mortgage obligations 26,582 (872) — — 26,582 (872) Collateralized loan obligations 114,173 (779) 429,799 (8,017) 543,972 (8,796) Commercial mortgage-backed securities — — 112,626 (1,819) 112,626 (1,819) Corporate notes 30,829 (532) 410,323 (36,201) 441,152 (36,733) Private label collateralized mortgage obligations 260,549 (8,133) 572,448 (49,912) 832,997 (58,045) Total $ 491,430 $ (10,535) $ 1,690,547 $ (112,720) $ 2,181,977 $ (123,255) December 31, 2023 Less Than 12 Months 12 Months or More Total (amounts in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale debt securities: Asset-backed securities $ — $ — $ 64,029 $ (4,027) $ 64,029 $ (4,027) Agency-guaranteed residential collateralized mortgage obligations — — 116,908 (12,681) 116,908 (12,681) Collateralized loan obligations 29,241 (392) 438,551 (10,626) 467,792 (11,018) Commercial mortgage-backed securities — — 121,636 (4,249) 121,636 (4,249) Corporate notes 23,243 (1,147) 424,768 (33,764) 448,011 (34,911) Private label collateralized mortgage obligations 303,750 (11,243) 613,007 (51,417) 916,757 (62,660) Total $ 356,234 $ (12,782) $ 1,778,899 $ (116,764) $ 2,135,133 $ (129,546) At March 31, 2024, there were 38 AFS debt securities with unrealized losses in the less-than-twelve-months category and 102 AFS debt securities with unrealized losses in the twelve-months-or-more category. Except for one asset-backed security and 19 corporate notes where there was a change in future estimated cash flows as further discussed below, the unrealized losses were principally due to changes in market interest rates and credit spreads that resulted in a negative impact on the respective securities’ fair value and expected to be recovered when market prices recover or at maturity. Customers does not intend to sell any of the 140 securities, and it is not more likely than not that Customers will be required to sell any of the 140 securities before recovery of the amortized cost basis. At December 31, 2023, there were 119 AFS debt securities in an unrealized loss position. Customers recorded an allowance for credit losses on one asset-backed security and 19 corporate notes where there was a change in future estimated cash flows during the three months ended March 31, 2024 and on four asset-backed securities and six corporate notes during the three months ended March 31, 2023. A discounted cash flow approach is used to determine the amount of the allowance. The cash flows expected to be collected, after considering expected prepayments, are discounted at the original effective interest rate. The amount of the allowance is limited to the difference between the amortized cost basis of the security and its estimated fair value. The following table presents the activity in the allowance for credit losses on AFS debt securities, by major security type, for the periods presented: Three Months Ended March 31, 2024 2023 (amounts in thousands) Asset-backed securities Corporate notes Total Asset-backed securities Corporate notes Total Balance at January 1 $ 483 $ 3,469 $ 3,952 $ 578 $ — $ 578 Credit losses on securities for which credit losses were not previously recorded — 502 502 — 1,383 1,383 Credit losses on previously impaired securities — 648 648 273 — 273 Decrease in allowance for credit losses on previously impaired securities (33) — (33) (61) — (61) Balance at March 31 $ 450 $ 4,619 $ 5,069 $ 790 $ 1,383 $ 2,173 At March 31, 2024 and December 31, 2023, no AFS investment securities holding of any one issuer, other than the U.S. government and its agencies, amounted to greater than 10% of shareholders’ equity. At March 31, 2024 and December 31, 2023, Customers Bank had pledged AFS investment securities aggregating $1.3 billion and $1.2 billion in fair value, respectively, as collateral for immediately available liquidity from the FRB. The counterparty does not have the ability to sell or repledge these securities. Investment securities held to maturity The amortized cost, approximate fair value and allowance for credit losses of investment securities held to maturity as of March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Net Carrying Value Gross Unrealized Gains Gross Unrealized Losses Fair Value Held to maturity debt securities: Asset-backed securities $ 509,690 $ — $ 509,690 $ 345 $ (2,432) $ 507,603 Agency-guaranteed residential mortgage-backed securities 7,001 — 7,001 — (1,087) 5,914 Agency-guaranteed commercial mortgage-backed securities 1,830 — 1,830 — (151) 1,679 Agency-guaranteed residential collateralized mortgage obligations 182,856 — 182,856 — (20,723) 162,133 Agency-guaranteed commercial collateralized mortgage obligations 146,001 — 146,001 — (21,535) 124,466 Private label collateralized mortgage obligations 184,659 — 184,659 — (13,826) 170,833 Total held to maturity debt securities $ 1,032,037 $ — $ 1,032,037 $ 345 $ (59,754) $ 972,628 December 31, 2023 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Net Carrying Value Gross Unrealized Gains Gross Unrealized Losses Fair Value Held to maturity debt securities: Asset-backed securities $ 575,990 $ — $ 575,990 $ 202 $ (2,064) $ 574,128 Agency-guaranteed residential mortgage-backed securities 7,039 — 7,039 — (649) 6,390 Agency-guaranteed commercial mortgage-backed securities 1,850 — 1,850 — (134) 1,716 Agency-guaranteed residential collateralized mortgage obligations 186,636 — 186,636 — (19,049) 167,587 Agency-guaranteed commercial collateralized mortgage obligations 146,765 — 146,765 — (23,178) 123,587 Private label collateralized mortgage obligations 184,890 — 184,890 — (11,859) 173,031 Total held to maturity debt securities $ 1,103,170 $ — $ 1,103,170 $ 202 $ (56,933) $ 1,046,439 (1) Accrued interest on HTM debt securities totaled $2.6 million and $2.7 million at March 31, 2024 and December 31, 2023, respectively, and is included in accrued interest receivable on the consolidated balance sheet. The following table presents HTM debt securities by stated maturity, including debt securities backed by mortgages and other assets with expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and, therefore, are classified separately with no specific maturity date: March 31, 2024 (amounts in thousands) Amortized Fair Asset-backed securities $ 509,690 $ 507,603 Agency-guaranteed residential mortgage-backed securities 7,001 5,914 Agency-guaranteed commercial mortgage-backed securities 1,830 1,679 Agency-guaranteed residential collateralized mortgage obligations 182,856 162,133 Agency-guaranteed commercial collateralized mortgage obligations 146,001 124,466 Private label collateralized mortgage obligations 184,659 170,833 Total held to maturity debt securities $ 1,032,037 $ 972,628 Customers recorded no allowance for credit losses on investment securities classified as held to maturity at March 31, 2024 and December 31, 2023. The U.S. government agency securities represent obligations issued by a U.S. government-sponsored enterprise or other federal government agency that are explicitly or implicitly guaranteed by the U.S. federal government and therefore, assumed to have zero credit losses. The private label collateralized mortgage obligations are highly rated with sufficient overcollateralization, and therefore, are estimated to have no expected credit losses. Customers recorded no allowance for its investments in the asset-backed securities. Customers considered the seniority of its beneficial interests, which include overcollateralization of these asset-backed securities in the estimate of the ACL at March 31, 2024 and December 31, 2023. The unrealized losses on HTM debt securities with no ACL were primarily due to changes in market interest rates that resulted in a negative impact on the respective securities’ fair value and are expected to be recovered when market prices recover or at maturity. Credit Quality Indicators Customers monitors the credit quality of HTM debt securities primarily through credit ratings provided by rating agencies. Investment grade debt securities are rated BBB- or higher by S&P Global Ratings, Baa3 or higher by Moody’s Investors Service or equivalent ratings by other rating agencies, and are generally considered to be of low credit risk. Except for the asset-backed securities and a private label collateralized mortgage obligation, all of the HTM debt securities held by Customers were investment grade or U.S. government agency guaranteed securities that were not rated at March 31, 2024 and December 31, 2023. The asset-backed securities and a private label collateralized mortgage obligation are not rated by rating agencies. Customers monitors the credit quality of these asset-backed securities and a private label collateralized mortgage obligation by evaluating the performance of the sold consumer installment loans and other underlying loans against the overcollateralization available for these securities. The following table presents the amortized cost of HTM debt securities based on their lowest credit rating available: March 31, 2024 (amounts in thousands) AAA AA Not Rated Total Held to maturity debt securities: Asset-backed securities $ — $ — $ 509,690 $ 509,690 Agency-guaranteed residential mortgage-backed securities — — 7,001 7,001 Agency-guaranteed commercial mortgage-backed securities — — 1,830 1,830 Agency-guaranteed residential collateralized mortgage obligations — — 182,856 182,856 Agency-guaranteed commercial collateralized mortgage obligations — — 146,001 146,001 Private label collateralized mortgage obligations 66,371 44,429 73,859 184,659 Total held to maturity debt securities $ 66,371 $ 44,429 $ 921,237 $ 1,032,037 Customers has elected to not estimate an ACL on accrued interest receivable on HTM debt securities, as it already has a policy in place to reverse or write-off accrued interest, through interest income, for debt securities in nonaccrual status in a timely manner. At March 31, 2024 and December 31, 2023, there were no HTM debt securities past due under the terms of their agreements or in nonaccrual status. At March 31, 2024 and December 31, 2023, Customers Bank had pledged HTM investment securities aggregating $391.4 million and $398.4 million in fair value, respectively, as collateral primarily for immediately available liquidity from the FRB and unused lines of credit with another financial institution. The counterparties do not have the ability to sell or repledge these securities.

Loans Held for Sale

Loans Held for Sale	3 Months Ended
	Mar. 31, 2024
Receivable, Held-for-Sale [Abstract]
Loans Held for Sale	LOANS HELD FOR SALE The composition of loans held for sale as of March 31, 2024 and December 31, 2023 was as follows: (amounts in thousands) March 31, 2024 December 31, 2023 Residential mortgage loans, at fair value $ 870 $ 1,215 Personal installment loans, at lower of cost or fair value 137,755 151,040 Other installment loans, at fair value 219,015 188,062 Total loans held for sale $ 357,640 $ 340,317 Total loans held for sale included NPLs of $0.6 million and $0.5 million as of March 31, 2024 and December 31, 2023, respectively.

Loans and Leases Receivable and

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases	LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES The following table presents loans and leases receivable as of March 31, 2024 and December 31, 2023. (amounts in thousands) March 31, 2024 December 31, 2023 Loans and leases receivable: Commercial: Commercial and industrial: Specialized lending (1) $ 5,104,405 $ 5,006,693 Other commercial and industrial (2) 1,222,053 1,279,147 Multifamily 2,123,675 2,138,622 Commercial real estate owner occupied 806,278 797,319 Commercial real estate non-owner occupied 1,182,084 1,177,650 Construction 185,601 166,393 Total commercial loans and leases receivable 10,624,096 10,565,824 Consumer: Residential real estate 482,537 484,435 Manufactured housing 37,382 38,670 Installment: Personal 492,892 555,533 Other 299,714 319,393 Total consumer loans receivable 1,312,525 1,398,031 Loans and leases receivable 11,936,621 11,963,855 Loans receivable, mortgage finance, at fair value 962,610 897,912 Allowance for credit losses on loans and leases (133,296) (135,311) Total loans and leases receivable, net of allowance for credit losses on loans and leases (3) $ 12,765,935 $ 12,726,456 (1) Includes direct finance equipment leases of $212.1 million and $205.7 million at March 31, 2024 and December 31, 2023, respectively. (2) Includes PPP loans of $52.0 million and $74.7 million at March 31, 2024 and December 31, 2023, respectively. (3) Includes deferred (fees) costs and unamortized (discounts) premiums, net of $(20.4) million and $(22.7) million at March 31, 2024 and December 31, 2023, respectively. Customers’ total loans and leases receivable includes loans receivable reported at fair value based on an election made to account for these loans at fair value, and loans and leases receivable predominately reported at their outstanding unpaid principal balance, net of charge-offs, deferred costs and fees, unamortized premiums and discounts, and evaluated for impairment. The total amount of accrued interest recorded for total loans was $92.2 million and $95.0 million at March 31, 2024 and December 31, 2023, respectively, and is presented in accrued interest receivable in the consolidated balance sheet. At March 31, 2024 and December 31, 2023, there were $23.8 million and $15.8 million of individually evaluated loans that were collateral-dependent, respectively. Substantially all individually evaluated loans were collateral-dependent and consisted primarily of commercial and industrial, commercial real estate, and residential real estate loans. Collateral-dependent commercial and industrial loans were secured by accounts receivable, inventory and equipment; collateral-dependent commercial real estate loans were secured by commercial real estate assets; and residential real estate loans were secured by residential real estate assets. Loans and leases receivable The following tables summarize loans and leases receivable by loan and lease type and performance status as of March 31, 2024 and December 31, 2023: March 31, 2024 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (2) Total past due Loans and leases not past due (3)(4) Total loans and leases (4) Commercial and industrial, including specialized lending $ 5,910 $ 180 $ 2,624 $ 8,714 $ 6,265,787 $ 6,274,501 Multifamily 10,331 — 5,161 15,492 2,108,183 2,123,675 Commercial real estate owner occupied 3,135 — 8,883 12,018 794,260 806,278 Commercial real estate non-owner occupied 27,632 — 62 27,694 1,154,390 1,182,084 Construction — — — — 185,601 185,601 Residential real estate 11,289 786 4,300 16,375 466,162 482,537 Manufactured housing 629 401 2,775 3,805 33,577 37,382 Installment 7,824 4,960 6,958 19,742 772,864 792,606 Total $ 66,750 $ 6,327 $ 30,763 $ 103,840 $ 11,780,824 $ 11,884,664 December 31, 2023 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (2) Total past due Loans and leases not past due (3) Total loans and leases (4) Commercial and industrial, including specialized lending $ 1,516 $ 322 $ 4,153 $ 5,991 $ 6,205,114 $ 6,211,105 Multifamily 16,003 — — 16,003 2,122,619 2,138,622 Commercial real estate owner occupied 449 3,814 5,827 10,090 787,229 797,319 Commercial real estate non-owner occupied 16,653 — — 16,653 1,160,997 1,177,650 Construction — — — — 166,393 166,393 Residential real estate 10,504 2,255 3,764 16,523 467,912 484,435 Manufactured housing 1,152 343 2,869 4,364 34,306 38,670 Installment 9,255 7,866 7,211 24,332 850,594 874,926 Total $ 55,532 $ 14,600 $ 23,824 $ 93,956 $ 11,795,164 $ 11,889,120 (1) Includes past due loans and leases that are accruing interest because collection is considered probable. (2) Includes loans amounting to $0.5 million as of March 31, 2024 and December 31, 2023 that are still accruing interest because collection is considered probable. (3) Loans and leases where next payment due is less than 30 days from the report date. The tables exclude PPP loans of $52.0 million, of which $2.7 million were 30-59 days past due and $32.3 million were 60 days or more past due as of March 31, 2024, and PPP loans of $74.7 million, of which $0.7 million were 30-59 days past due and $48.5 million were 60 days or more past due as of December 31, 2023. Claims for guarantee payments are submitted to the SBA for eligible PPP loans that are more than 60 days past due. (4) Includes PCD loans of $154.0 million and $157.2 million at March 31, 2024 and December 31, 2023, respectively. Nonaccrual Loans and Leases The following table presents the amortized cost of loans and leases held for investment on nonaccrual status. March 31, 2024 December 31, 2023 (amounts in thousands) Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Commercial and industrial, including specialized lending $ 3,322 $ 286 $ 3,608 $ 3,365 $ 1,071 $ 4,436 Multifamily 5,161 — 5,161 — — — Commercial real estate owner occupied 8,920 — 8,920 5,869 — 5,869 Commercial real estate non-owner occupied 62 — 62 — — — Residential real estate 7,664 425 8,089 6,685 117 6,802 Manufactured housing — 2,268 2,268 — 2,331 2,331 Installment — 6,958 6,958 — 7,211 7,211 Total $ 25,129 $ 9,937 $ 35,066 $ 15,919 $ 10,730 $ 26,649 Interest income recognized on nonaccrual loans was insignificant for the three months ended March 31, 2024 and 2023. Accrued interest reversed when the loans went to nonaccrual status was insignificant for the three months ended March 31, 2024 and 2023. Loans receivable, mortgage finance, at fair value Mortgage finance loans consist of commercial loans to mortgage companies. These mortgage finance lending transactions are subject to master repurchase agreements. As a result of the contractual provisions, for accounting purposes, control of the underlying mortgage loan has not transferred and the rewards and risks of the mortgage loans are not assumed by Customers. The mortgage finance loans are designated as loans held for investment and reported at fair value based on an election made to account for the loans at fair value. Pursuant to the agreements, Customers funds the pipelines for these mortgage lenders by sending payments directly to the closing agents for funded mortgage loans and receives proceeds directly from third party investors when the underlying mortgage loans are sold into the secondary market. The fair value of the mortgage finance loans is estimated as the amount of cash initially advanced to fund the mortgage, plus accrued interest and fees, as specified in the respective agreements. The interest rates on these loans are variable, and the lending transactions are short-term, with an average life under 30 days from purchase to sale. The primary goal of these lending transactions is to provide liquidity to mortgage companies. At March 31, 2024 and December 31, 2023, all of Customers’ mortgage finance loans were current in terms of payment. As these loans are reported at their fair value, they do not have an ACL and are therefore excluded from ACL-related disclosures. Allowance for credit losses on loans and leases The changes in the ACL on loans and leases by loan and lease type for the three months ended March 31, 2024 and 2023 are presented in the tables below. (amounts in thousands) Commercial and industrial (1)(2) Multifamily Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended Ending Balance, December 31, 2023 $ 23,503 $ 16,343 $ 9,882 $ 16,859 $ 1,482 $ 6,586 $ 4,239 $ 56,417 $ 135,311 Charge-offs (5,396) (473) (22) — — (19) — (16,917) (22,827) Recoveries 1,724 — — — — 1 — 3,134 4,859 Provision (benefit) for credit losses on loans and leases 3,172 2,437 341 1,461 384 139 (79) 8,098 15,953 Ending Balance, $ 23,003 $ 18,307 $ 10,201 $ 18,320 $ 1,866 $ 6,707 $ 4,160 $ 50,732 $ 133,296 (amounts in thousands) Commercial and industrial (1)(2) Multifamily Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended Ending Balance, December 31, 2022 $ 17,582 $ 14,541 $ 6,454 $ 11,219 $ 1,913 $ 6,094 $ 4,430 $ 68,691 $ 130,924 Charge-offs (160) — — (4,239) — — — (16,715) (21,114) Recoveries 231 — — 5 116 2 — 2,109 2,463 Provision (benefit) for credit losses on loans and leases 2,397 543 2,018 4,047 307 757 (91) 8,030 18,008 Ending Balance, $ 20,050 $ 15,084 $ 8,472 $ 11,032 $ 2,336 $ 6,853 $ 4,339 $ 62,115 $ 130,281 (1) Includes specialized lending. (2) PPP loans include an embedded credit enhancement from the SBA, which guarantees 100% of the principal and interest owed by the borrower provided that the SBA’s eligibility criteria are met. As a result, the eligible PPP loans do not have an ACL. At March 31, 2024, the ACL on loans and leases was $133.3 million, a decrease of $2.0 million from the December 31, 2023 balance of $135.3 million. The decrease in ACL for the three months ended March 31, 2024 was primarily attributable to a decrease in consumer installment loan balances held for investment. Loan Modifications for Borrowers Experiencing Financial Difficulty A borrower is considered to be experiencing financial difficulty when there is a significant doubt about the borrower’s ability to make the required principal and interest payments on the loan or to get an equivalent financing from another creditor at a market rate for a similar loan. When borrowers are experiencing financial difficulty, Customers may make certain loan modifications as part of loss mitigation strategies to maximize expected payment. To be classified as a modification made to a borrower experiencing financial difficulty, the modification must be in the form of an interest rate reduction, principal forgiveness, or an other-than-insignificant payment delay (payment deferral), term extension, or combinations thereof. Customers will generally try other forms of relief before principal forgiveness. Any contractual reduction in the amount of principal due without receiving payment or assets is considered forgiveness. For the purpose of this disclosure, Customers considers any contractual change in interest rate that results in a reduction in interest rate relative to the current stated interest rate as an interest rate reduction. Generally, Customers considers any delay in payment of greater than 90 days in the last 12 months to be significant. Term extensions extend the original contractual maturity of the loan. For the purpose of this disclosure, modification of contingent payment features or covenants that would have accelerated payment are not considered term extensions. The following table presents the amortized cost of loans that were modified to borrowers experiencing financial difficulty for the three months ended March 31, 2024 and 2023, disaggregated by class of financing receivable and type of modification granted. Three Months Ended March 31, 2024 (dollars in thousands) Term Extension Payment Deferral Debt Forgiveness Interest Rate Reduction and Term Extension Total Percentage of Total by Financing Class Commercial and industrial, including specialized lending $ — $ 1,980 $ — $ — $ 1,980 0.03 % Multifamily — 10,688 — — 10,688 0.50 % Residential real estate — 57 — — 57 0.01 % Personal installment 3,747 198 36 — 3,981 0.50 % Total $ 3,747 $ 12,923 $ 36 $ — $ 16,706 Three Months Ended March 31, 2023 (dollars in thousands) Term Extension Payment Deferral Debt Forgiveness Interest Rate Reduction and Term Extension Total Percentage of Total by Financing Class Commercial and industrial, including specialized lending $ 172 $ — $ — $ — $ 172 0.00 % Commercial real estate owner occupied 169 — — — 169 0.02 % Manufactured housing 7 — — 63 70 0.16 % Personal installment 4,833 131 114 — 5,078 0.60 % Total $ 5,181 $ 131 $ 114 $ 63 $ 5,489 As of March 31, 2024, there were no commitments to lend additional funds to debtors experiencing financial difficulty whose loans have been modified during the three months ended March 31, 2024. The following table summarizes the impacts of loan modifications made to borrowers experiencing financial difficulty for the three months ended March 31, 2024 and 2023. Three Months Ended March 31, 2024 Three Months Ended March 31, 2023 Weighted Average Weighted Average (dollars in thousands) Interest Rate Reduction (%) Term Extension Payment Deferral Debt Forgiven Interest Rate Reduction (%) Term Extension Payment Deferral Debt Forgiven Commercial and industrial, including specialized lending —% 0 3 $ — —% 4 0 $ — Multifamily — 0 12 — — 0 0 — Commercial real estate owner occupied — 0 0 — — 4 0 — Residential real estate — 0 5 — — 0 0 — Manufactured housing — 0 0 — 0.8 55 0 — Personal installment — 6 6 100 — 5 6 66 The performance of loans made to borrowers experiencing financial difficulty in which modifications were made is closely monitored to understand the effectiveness of modification efforts. Loans are considered to be in payment default at 90 days or more past due. The following table presents an aging analysis of loan modifications made to borrowers experiencing financial difficulty in the twelve months ended March 31, 2024 and the three months ended three months ended March 31, 2023. March 31, 2024 (dollars in thousands) 30-59 Days past due 60-89 Days past due 90 Days or more past due Current Total Commercial and industrial, including specialized lending $ 1,980 $ — $ — $ 15,348 $ 17,328 Multifamily — — — 10,688 10,688 Residential real estate 57 — — 46 103 Manufactured housing — 92 31 620 743 Personal installment 943 626 546 12,131 14,246 Total $ 2,980 $ 718 $ 577 $ 38,833 $ 43,108 March 31, 2023 (1) (dollars in thousands) 30-59 Days past due 60-89 Days past due 90 Days or more past due Current Total Commercial and industrial, including specialized lending $ — $ 172 $ — $ — $ 172 Commercial real estate owner occupied — — 169 — 169 Manufactured housing — — — 70 70 Personal installment 202 44 21 4,811 5,078 Total $ 202 $ 216 $ 190 $ 4,881 $ 5,489 (1) Customers adopted ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures (“ASU 2022-02”) effective January 1, 2023, therefore, the March 31, 2023 balances only include loans since ASU 2022-02 became effective. The loans to borrowers experiencing financial difficulty that were modified during the twelve months ended March 31, 2024 that subsequently defaulted were not material. During the three months ended March 31, 2023, there were no borrowers experiencing financial difficulty that subsequently defaulted. Customers’ ACL is influenced by loan level characteristics that inform the assessed propensity to default. As such, the provision for credit losses is impacted by changes in such loan level characteristics, such as payment performance. Loans made to borrowers experiencing financial difficulty can be classified as either accrual or nonaccrual. Credit Quality Indicators The ACL represents management’s estimate of expected losses in Customers’ loans and leases receivable portfolio, excluding mortgage finance loans reported at fair value pursuant to a fair value option election and PPP loans receivable. Commercial and industrial including specialized lending, multifamily, owner occupied commercial real estate, non-owner occupied commercial real estate, and construction loans are rated based on an internally assigned risk rating system which is assigned at the time of loan origination and reviewed on a periodic, or on an “as needed” basis. Residential real estate, manufactured housing and installment loans are evaluated based on the payment activity of the loan. To facilitate the monitoring of credit quality within the commercial and industrial including specialized lending, multifamily, owner occupied commercial real estate, non-owner occupied commercial real estate, and construction loan portfolios, and as an input in the ACL lifetime loss rate model for the commercial and industrial loan portfolio, the Bank utilizes the following categories of risk ratings: pass/satisfactory (includes risk rating 1 through 6), special mention, substandard, doubtful, and loss. The risk rating categories, which are derived from standard regulatory rating definitions, are assigned upon initial approval of credit to borrowers and updated periodically thereafter. Pass ratings, which are assigned to those borrowers who do not have identified potential or well-defined weaknesses and for whom there is a high likelihood of orderly repayment, are updated periodically based on the size and credit characteristics of the borrower. All other categories are updated on a quarterly basis during the month preceding the end of the calendar quarter. While assigning risk ratings involves judgment, the risk-rating process allows management to identify riskier credits in a timely manner and allocate the appropriate resources to manage those loans and leases. The 2023 Form 10-K describes Customers Bancorp’s risk rating grades. Risk ratings are not established for certain consumer loans, including residential real estate, home equity, manufactured housing, and installment loans, mainly because these portfolios consist of a larger number of homogeneous loans with smaller balances. Instead, these portfolios are evaluated for risk mainly based upon aggregate payment history through the monitoring of delinquency levels and trends and are classified as performing and non-performing. PPP loans of $52.0 million and $74.7 million at March 31, 2024 and December 31, 2023, respectively, are excluded in the tables below as these loans are fully guaranteed by the SBA, provided that the eligibility criteria are met. The following tables present the credit ratings of loans and leases receivable and current period gross write-offs as of March 31, 2024 and December 31, 2023. Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2024 2023 2022 2021 2020 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Commercial and industrial loans and leases, including specialized lending: Pass $ 453,522 $ 1,023,266 $ 2,018,082 $ 471,404 $ 142,178 $ 60,734 $ 1,594,160 $ 343,934 $ 6,107,280 Special mention — 12,090 176 5,000 6,884 3,430 10,923 1,689 40,192 Substandard — 699 18,575 34,687 27,274 39,866 5,855 73 127,029 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 453,522 $ 1,036,055 $ 2,036,833 $ 511,091 $ 176,336 $ 104,030 $ 1,610,938 $ 345,696 $ 6,274,501 Commercial and industrial loans and leases charge-offs: Three Months Ended March 31, 2024 (1) $ 145 $ 484 $ 344 $ 3,397 $ 692 $ 334 $ — $ — $ 5,396 Multifamily loans: Pass $ — $ 850 $ 1,239,644 $ 344,966 $ 128,439 $ 284,391 $ — $ — $ 1,998,290 Special mention — — — — — 88,656 — — 88,656 Substandard — — — — — 36,729 — — 36,729 Doubtful — — — — — — — — — Total multifamily loans $ — $ 850 $ 1,239,644 $ 344,966 $ 128,439 $ 409,776 $ — $ — $ 2,123,675 Multifamily loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ 473 $ — $ — $ 473 Commercial real estate owner occupied loans: Pass $ 66,614 $ 34,503 $ 226,892 $ 178,805 $ 66,229 $ 152,046 $ — $ 11,288 $ 736,377 Special mention — — — — — 35,530 — — 35,530 Substandard — 2,944 — 15,385 — 16,042 — — 34,371 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 66,614 $ 37,447 $ 226,892 $ 194,190 $ 66,229 $ 203,618 $ — $ 11,288 $ 806,278 Commercial real estate owner occupied loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ 22 $ — $ — $ 22 Commercial real estate non-owner occupied loans: Pass $ 7,195 $ 16,791 $ 337,029 $ 103,661 $ 150,553 $ 456,456 $ — $ — $ 1,071,685 Special mention — — 5,380 — 20,570 415 — — 26,365 Substandard — — — — — 84,034 — — 84,034 Doubtful — — — — — — — — — Total commercial real estate non-owner occupied loans $ 7,195 $ 16,791 $ 342,409 $ 103,661 $ 171,123 $ 540,905 $ — $ — $ 1,182,084 Commercial real estate non-owner occupied loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ — $ — $ — $ — Construction loans: Pass $ 3,214 $ 14,234 $ 135,023 $ 25,541 $ — $ 3,967 $ — $ — $ 181,979 Special mention — 3,622 — — — — — — 3,622 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 3,214 $ 17,856 $ 135,023 $ 25,541 $ — $ 3,967 $ — $ — $ 185,601 Construction loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ — $ — $ — $ — Total commercial loans and leases receivable $ 530,545 $ 1,108,999 $ 3,980,801 $ 1,179,449 $ 542,127 $ 1,262,296 $ 1,610,938 $ 356,984 $ 10,572,139 Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2024 2023 2022 2021 2020 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Total commercial loans and leases receivable charge-offs: Three Months Ended March 31, 2024 $ 145 $ 484 $ 344 $ 3,397 $ 692 $ 829 $ — $ — $ 5,891 Residential real estate loans: Performing $ 4,437 $ 22,540 $ 171,091 $ 129,844 $ 6,339 $ 85,373 $ 55,093 $ — $ 474,717 Non-performing — — 1,066 1,776 226 4,747 5 — 7,820 Total residential real estate loans $ 4,437 $ 22,540 $ 172,157 $ 131,620 $ 6,565 $ 90,120 $ 55,098 $ — $ 482,537 Residential real estate loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ 19 $ — $ — $ 19 Manufactured housing loans: Performing $ — $ — $ — $ — $ — $ 35,185 $ — $ — $ 35,185 Non-performing — — — — — 2,197 — — 2,197 Total manufactured housing loans $ — $ — $ — $ — $ — $ 37,382 $ — $ — $ 37,382 Manufactured housing loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ — $ — $ — $ — Installment loans: Performing $ 15,048 $ 227,664 $ 268,738 $ 132,929 $ 53,774 $ 36,543 $ 48,852 $ 7 $ 783,555 Non-performing — 3,628 3,065 1,363 351 481 163 — 9,051 Total installment loans $ 15,048 $ 231,292 $ 271,803 $ 134,292 $ 54,125 $ 37,024 $ 49,015 $ 7 $ 792,606 Installment loans charge-offs: Three Months Ended March 31, 2024 $ 1,072 $ 1,053 $ 6,220 $ 5,237 $ 1,273 $ 2,062 $ — $ — $ 16,917 Total consumer loans $ 19,485 $ 253,832 $ 443,960 $ 265,912 $ 60,690 $ 164,526 $ 104,113 $ 7 $ 1,312,525 Total consumer loans charge-offs: Three Months Ended March 31, 2024 $ 1,072 $ 1,053 $ 6,220 $ 5,237 $ 1,273 $ 2,081 $ — $ — $ 16,936 Loans and leases receivable $ 550,030 $ 1,362,831 $ 4,424,761 $ 1,445,361 $ 602,817 $ 1,426,822 $ 1,715,051 $ 356,991 $ 11,884,664 Loans and leases receivable charge-offs: Three Months Ended March 31, 2024 $ 1,217 $ 1,537 $ 6,564 $ 8,634 $ 1,965 $ 2,910 $ — $ — $ 22,827 (1) Charge-offs for the three months ended March 31, 2024 included $3.4 million of commercial and industrial loans originated under the PPP that were subsequently determined to be ineligible for SBA forgiveness and guarantee and were ultimately deemed uncollectible. Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2023 2022 2021 2020 2019 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Commercial and industrial loans and leases, including specialized lending: Pass $ 1,184,923 $ 1,909,592 $ 483,039 $ 170,384 $ 59,213 $ 63,480 $ 1,722,559 $ 384,947 $ 5,978,137 Special mention 18,000 3,377 5,127 1,986 — 595 7,916 2,903 39,904 Substandard 14,738 39,258 61,533 26,660 4,803 42,062 4,010 — 193,064 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 1,217,661 $ 1,952,227 $ 549,699 $ 199,030 $ 64,016 $ 106,137 $ 1,734,485 $ 387,850 $ 6,211,105 Commercial and industrial loans and leases charge-offs: For the Year Ended December 31, 2023 (1)(2) $ 1,483 $ 381 $ 3,169 $ 10,348 $ 24 $ 1,510 $ — $ — $ 16,915 Multifamily loans: Pass $ 845 $ 1,229,198 $ 371,016 $ 127,493 $ 43,046 $ 253,806 $ — $ — $ 2,025,404 Special mention — — — — 6,468 67,035 — — 73,503 Substandard — — — — — 39,715 — — 39,715 Doubtful — — — — — — — — — Total multifamily loans $ 845 $ 1,229,198 $ 371,016 $ 127,493 $ 49,514 $ 360,556 $ — $ — $ 2,138,622 Multifamily loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 3,574 $ — $ — $ 3,574 Commercial real estate owner occupied loans: Pass $ 41,011 $ 254,878 $ 180,289 $ 77,821 $ 44,382 $ 120,248 $ — $ 11,318 $ 729,947 Special mention — — 15,432 — 35,691 47 — — 51,170 Substandard — — — — 347 15,855 — — 16,202 Doubtful — — — — — — — — Total commercial real estate owner occupied loans $ 41,011 $ 254,878 $ 195,721 $ 77,821 $ 80,420 $ 136,150 $ — $ 11,318 $ 797,319 Commercial real estate owner occupied loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 39 $ — $ — $ 39 Commercial real estate non-owner occupied loans: Pass $ 12,906 $ 325,881 $ 109,521 $ 152,227 $ 88,586 $ 367,996 $ — $ — $ 1,057,117 Special mention — — — 20,702 — 9,148 — — 29,850 Substandard — 10,910 — — 8,113 71,660 — — 90,683 Doubtful — — — — — — — — — Total commercial real estate non-owner occupied loans $ 12,906 $ 336,791 $ 109,521 $ 172,929 $ 96,699 $ 448,804 $ — $ — $ 1,177,650 Commercial real estate non-owner occupied loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 4,527 $ — $ — $ 4,527 Construction loans: Pass $ 17,594 $ 138,797 $ 2,567 $ — $ — $ 4,580 $ — $ 1,100 $ 164,638 Special mention 1,755 — — — — — — — 1,755 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 19,349 $ 138,797 $ 2,567 $ — $ — $ 4,580 $ — $ 1,100 $ 166,393 Construction loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ — $ — $ — $ — Total commercial loans and leases receivable $ 1,291,772 $ 3,911,891 $ 1,228,524 $ 577,273 $ 290,649 $ 1,056,227 $ 1,734,485 $ 400,268 $ 10,491,089 Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2023 2022 2021 2020 2019 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Total commercial loans and leases receivable charge-offs: For the Year Ended December 31, 2023 $ 1,483 $ 381 $ 3,169 $ 10,348 $ 24 $ 9,650 $ — $ — $ 25,055 Residential real estate loans: Performing $ 22,613 $ 173,424 $ 131,621 $ 6,458 $ 15,508 $ 71,433 $ 56,844 $ — $ 477,901 Non-performing — 350 1,236 229 545 3,993 181 — 6,534 Total residential real estate loans $ 22,613 $ 173,774 $ 132,857 $ 6,687 $ 16,053 $ 75,426 $ 57,025 $ — $ 484,435 Residential real estate loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 69 $ — $ — $ 69 Manufactured housing loans: Performing $ — $ — $ — $ — $ 98 $ 36,464 $ — $ — $ 36,562 Non-performing — — — — — 2,108 — — 2,108 Total manufactured housing loans $ — $ — $ — $ — $ 98 $ 38,572 $ — $ — $ 38,670 Manufactured housing loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ — $ — $ — $ — Installment loans: Performing $ 253,958 $ 307,566 $ 158,381 $ 50,354 $ 39,953 $ 3,448 $ 51,480 $ — $ 865,140 Non-performing 2,634 4,102 1,751 546 477 86 190 — 9,786 Total installment loans $ 256,592 $ 311,668 $ 160,132 $ 50,900 $ 40,430 $ 3,534 $ 51,670 $ — $ 874,926 Installment loans charge-offs: For the Year Ended December 31, 2023 $ 7,728 $ 24,605 $ 23,984 $ 5,590 $ 6,797 $ 1,238 $ — $ — $ 69,942 Total consumer loans $ 279,205 $ 485,442 $ 292,989 $ 57,587 $ 56,581 $ 117,532 $ 108,695 $ — $ 1,398,031 Total consumer loans charge-offs: For the Year Ended December 31, 2023 $ 7,728 $ 24,605 $ 23,984 $ 5,590 $ 6,797 $ 1,307 $ — $ — $ 70,011 Loans and leases receivable $ 1,570,977 $ 4,397,333 $ 1,521,513 $ 634,860 $ 347,230 $ 1,173,759 $ 1,843,180 $ 400,268 $ 11,889,120 Loans and leases receivable charge-offs: For the Year Ended December 31, 2023 $ 9,211 $ 24,986 $ 27,153 $ 15,938 $ 6,821 $ 10,957 $ — $ — $ 95,066 (1) Excludes $6.2 million of charge-offs for certain PCD loans against $8.7 million of allowance for credit losses on PCD loans recognized upon acquisition of a venture banking loan portfolio (included within specialized lending) from the FDIC on June 15, 2023. These PCD loans were originated in years 2016 to 2022. (2) Charge-offs for the year ended December 31, 2023 included $10.7 million of commercial and industrial loans originated under the PPP that were subsequently determined to be ineligible for SBA forgiveness and guarantee and were ultimately deemed uncollectible. Loan Purchases and Sales Purchases and sales of loans held for investment were as follows for the three months ended March 31, 2024 and 2023: Three Months Ended March 31, (amounts in thousands) 2024 2023 Purchases (1) Other commercial and industrial $ 7,403 $ 5,445 Commercial real estate owner occupied — 2,867 Residential real estate — 4,238 Total $ 7,403 $ 12,550 (1) Amounts reported in the above table are the unpaid principal balance at time of purchase. The purchase price was 100.0% and 101.9% of the loans’ unpaid principal balance for the three months ended March 31, 2024 and 2023, respectively. Loans Pledged as Collateral Customers has pledged eligible commercial and residential real estate, multifamily, commercial and industrial, PPP and consumer installment loans as collateral for borrowings outstanding or available immediately from the FHLB and FRB in the amount of $7.6 billion and $7.0 billion at March 31, 2024 and December 31, 2023, respectively.

Leases

Leases	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Leases	LEASES Lessee Customers has operating leases for its branches, certain LPOs, and administrative offices, with remaining lease terms ranging between four months and nine years. These operating leases comprise substantially all of Customers’ obligations in which Customers is the lessee. These lease agreements typically consist of initial lease terms ranging between one As most of Customers’ operating leases do not provide an implicit rate, Customers utilized its incremental borrowing rate when determining the present value of lease payments. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Operating lease ROU assets Other assets $ 16,741 $ 15,644 LIABILITIES Operating lease liabilities Other liabilities $ 18,987 $ 18,048 The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2024 2023 Operating lease cost (1) Occupancy expenses $ 1,185 $ 1,218 (1) There were no variable lease costs for the three months ended March 31, 2024 and 2023, and sublease income for operating leases was immaterial. Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2024: (amounts in thousands) March 31, 2024 2024 $ 3,683 2025 4,218 2026 3,462 2027 2,966 2028 2,600 Thereafter 3,667 Total minimum payments 20,596 Less: interest 1,609 Present value of lease liabilities $ 18,987 Customers does not have leases where it is involved with the construction or design of an underlying asset. Cash paid pursuant to the operating lease liabilities was $1.4 million and $1.7 million for the three months ended March 31, 2024 and 2023, respectively. These payments were reported as cash flows used in operating activities in the statement of cash flows. The following table summarizes the weighted average remaining lease term and discount rate for Customers’ operating leases at March 31, 2024 and December 31, 2023: March 31, 2024 December 31, 2023 Weighted average remaining lease term (years) Operating leases 5.7 years 5.6 years Weighted average discount rate Operating leases 3.51 % 3.28 % Equipment Lessor Customers’ commercial equipment financing group goes to market through the following origination platforms: vendors, intermediaries, direct and capital markets. The commercial equipment financing group is primarily focused on serving the following industries: transportation, construction (includes crane and utility), marine, franchise, general manufacturing (includes machine tool), helicopter/fixed wing, solar, packaging, plastics and food processing. Lease terms typically range from 24 months to 120 months. The commercial equipment financing group offers the following products: Loans, Capital Lease, PUT, TRAC, Split-TRAC, and FMV. Direct finance equipment leases are included in commercial and industrial loans and leases receivable. The estimated residual values for direct finance and operating leases are established by utilizing internally developed analyses, external studies, and/or third-party appraisals to establish a residual position. For the direct finance leases, only Customers’ Split-TRAC leases have residual risk and the unguaranteed portions are typically nominal. Expected credit losses on direct financing leases and the related estimated residual values are included in the ACL on loans and leases. Leased assets under operating leases are reported at amortized cost net of accumulated depreciation, and any impairment charges and are presented in other assets. The depreciation expense of the leased assets is recognized on a straight-line basis over the contractual term of the leases up to the expected residual value. The expected residual value and, accordingly, the monthly depreciation expense, may change throughout the term of the lease. Operating lease rental income for leased assets is recognized in commercial lease income on a straight-line basis over the lease term. Customers periodically reviews its operating leased assets for impairment. An impairment loss is recognized if the carrying amount of the operating leased asset exceeds its fair value and is not recoverable. The carrying amount of operating leased assets is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the lease payments and the estimated residual value upon the eventual disposition of the equipment. The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2024 and December 31, 2023: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 198,187 $ 190,559 Guaranteed residual assets Loans and leases receivable 16,796 15,783 Unguaranteed residual assets Loans and leases receivable 10,010 10,010 Deferred initial direct costs Loans and leases receivable 1,231 1,213 Unearned income Loans and leases receivable (14,076) (11,891) Net investment in direct financing leases $ 212,148 $ 205,674 Operating leases Investment in operating leases Other assets $ 278,379 $ 282,208 Accumulated depreciation Other assets (78,739) (77,672) Deferred initial direct costs Other assets 1,116 1,192 Net investment in operating leases 200,756 205,728 Total lease assets $ 412,904 $ 411,402 Maturities of operating and direct financing lease receivables were as follows at March 31, 2024: (amounts in thousands) Operating leases Direct financing leases 2024 $ 32,330 $ 38,847 2025 39,137 45,807 2026 44,812 38,092 2027 33,566 33,108 2028 53,255 23,609 Thereafter 25,654 19,850 Total minimum payments $ 228,754 199,313 Less: interest 1,126 Present value of lease receivables $ 198,187
Leases	LEASES Lessee Customers has operating leases for its branches, certain LPOs, and administrative offices, with remaining lease terms ranging between four months and nine years. These operating leases comprise substantially all of Customers’ obligations in which Customers is the lessee. These lease agreements typically consist of initial lease terms ranging between one As most of Customers’ operating leases do not provide an implicit rate, Customers utilized its incremental borrowing rate when determining the present value of lease payments. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Operating lease ROU assets Other assets $ 16,741 $ 15,644 LIABILITIES Operating lease liabilities Other liabilities $ 18,987 $ 18,048 The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2024 2023 Operating lease cost (1) Occupancy expenses $ 1,185 $ 1,218 (1) There were no variable lease costs for the three months ended March 31, 2024 and 2023, and sublease income for operating leases was immaterial. Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2024: (amounts in thousands) March 31, 2024 2024 $ 3,683 2025 4,218 2026 3,462 2027 2,966 2028 2,600 Thereafter 3,667 Total minimum payments 20,596 Less: interest 1,609 Present value of lease liabilities $ 18,987 Customers does not have leases where it is involved with the construction or design of an underlying asset. Cash paid pursuant to the operating lease liabilities was $1.4 million and $1.7 million for the three months ended March 31, 2024 and 2023, respectively. These payments were reported as cash flows used in operating activities in the statement of cash flows. The following table summarizes the weighted average remaining lease term and discount rate for Customers’ operating leases at March 31, 2024 and December 31, 2023: March 31, 2024 December 31, 2023 Weighted average remaining lease term (years) Operating leases 5.7 years 5.6 years Weighted average discount rate Operating leases 3.51 % 3.28 % Equipment Lessor Customers’ commercial equipment financing group goes to market through the following origination platforms: vendors, intermediaries, direct and capital markets. The commercial equipment financing group is primarily focused on serving the following industries: transportation, construction (includes crane and utility), marine, franchise, general manufacturing (includes machine tool), helicopter/fixed wing, solar, packaging, plastics and food processing. Lease terms typically range from 24 months to 120 months. The commercial equipment financing group offers the following products: Loans, Capital Lease, PUT, TRAC, Split-TRAC, and FMV. Direct finance equipment leases are included in commercial and industrial loans and leases receivable. The estimated residual values for direct finance and operating leases are established by utilizing internally developed analyses, external studies, and/or third-party appraisals to establish a residual position. For the direct finance leases, only Customers’ Split-TRAC leases have residual risk and the unguaranteed portions are typically nominal. Expected credit losses on direct financing leases and the related estimated residual values are included in the ACL on loans and leases. Leased assets under operating leases are reported at amortized cost net of accumulated depreciation, and any impairment charges and are presented in other assets. The depreciation expense of the leased assets is recognized on a straight-line basis over the contractual term of the leases up to the expected residual value. The expected residual value and, accordingly, the monthly depreciation expense, may change throughout the term of the lease. Operating lease rental income for leased assets is recognized in commercial lease income on a straight-line basis over the lease term. Customers periodically reviews its operating leased assets for impairment. An impairment loss is recognized if the carrying amount of the operating leased asset exceeds its fair value and is not recoverable. The carrying amount of operating leased assets is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the lease payments and the estimated residual value upon the eventual disposition of the equipment. The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2024 and December 31, 2023: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 198,187 $ 190,559 Guaranteed residual assets Loans and leases receivable 16,796 15,783 Unguaranteed residual assets Loans and leases receivable 10,010 10,010 Deferred initial direct costs Loans and leases receivable 1,231 1,213 Unearned income Loans and leases receivable (14,076) (11,891) Net investment in direct financing leases $ 212,148 $ 205,674 Operating leases Investment in operating leases Other assets $ 278,379 $ 282,208 Accumulated depreciation Other assets (78,739) (77,672) Deferred initial direct costs Other assets 1,116 1,192 Net investment in operating leases 200,756 205,728 Total lease assets $ 412,904 $ 411,402 Maturities of operating and direct financing lease receivables were as follows at March 31, 2024: (amounts in thousands) Operating leases Direct financing leases 2024 $ 32,330 $ 38,847 2025 39,137 45,807 2026 44,812 38,092 2027 33,566 33,108 2028 53,255 23,609 Thereafter 25,654 19,850 Total minimum payments $ 228,754 199,313 Less: interest 1,126 Present value of lease receivables $ 198,187
Leases	LEASES Lessee Customers has operating leases for its branches, certain LPOs, and administrative offices, with remaining lease terms ranging between four months and nine years. These operating leases comprise substantially all of Customers’ obligations in which Customers is the lessee. These lease agreements typically consist of initial lease terms ranging between one As most of Customers’ operating leases do not provide an implicit rate, Customers utilized its incremental borrowing rate when determining the present value of lease payments. The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Operating lease ROU assets Other assets $ 16,741 $ 15,644 LIABILITIES Operating lease liabilities Other liabilities $ 18,987 $ 18,048 The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2024 2023 Operating lease cost (1) Occupancy expenses $ 1,185 $ 1,218 (1) There were no variable lease costs for the three months ended March 31, 2024 and 2023, and sublease income for operating leases was immaterial. Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2024: (amounts in thousands) March 31, 2024 2024 $ 3,683 2025 4,218 2026 3,462 2027 2,966 2028 2,600 Thereafter 3,667 Total minimum payments 20,596 Less: interest 1,609 Present value of lease liabilities $ 18,987 Customers does not have leases where it is involved with the construction or design of an underlying asset. Cash paid pursuant to the operating lease liabilities was $1.4 million and $1.7 million for the three months ended March 31, 2024 and 2023, respectively. These payments were reported as cash flows used in operating activities in the statement of cash flows. The following table summarizes the weighted average remaining lease term and discount rate for Customers’ operating leases at March 31, 2024 and December 31, 2023: March 31, 2024 December 31, 2023 Weighted average remaining lease term (years) Operating leases 5.7 years 5.6 years Weighted average discount rate Operating leases 3.51 % 3.28 % Equipment Lessor Customers’ commercial equipment financing group goes to market through the following origination platforms: vendors, intermediaries, direct and capital markets. The commercial equipment financing group is primarily focused on serving the following industries: transportation, construction (includes crane and utility), marine, franchise, general manufacturing (includes machine tool), helicopter/fixed wing, solar, packaging, plastics and food processing. Lease terms typically range from 24 months to 120 months. The commercial equipment financing group offers the following products: Loans, Capital Lease, PUT, TRAC, Split-TRAC, and FMV. Direct finance equipment leases are included in commercial and industrial loans and leases receivable. The estimated residual values for direct finance and operating leases are established by utilizing internally developed analyses, external studies, and/or third-party appraisals to establish a residual position. For the direct finance leases, only Customers’ Split-TRAC leases have residual risk and the unguaranteed portions are typically nominal. Expected credit losses on direct financing leases and the related estimated residual values are included in the ACL on loans and leases. Leased assets under operating leases are reported at amortized cost net of accumulated depreciation, and any impairment charges and are presented in other assets. The depreciation expense of the leased assets is recognized on a straight-line basis over the contractual term of the leases up to the expected residual value. The expected residual value and, accordingly, the monthly depreciation expense, may change throughout the term of the lease. Operating lease rental income for leased assets is recognized in commercial lease income on a straight-line basis over the lease term. Customers periodically reviews its operating leased assets for impairment. An impairment loss is recognized if the carrying amount of the operating leased asset exceeds its fair value and is not recoverable. The carrying amount of operating leased assets is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the lease payments and the estimated residual value upon the eventual disposition of the equipment. The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2024 and December 31, 2023: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 198,187 $ 190,559 Guaranteed residual assets Loans and leases receivable 16,796 15,783 Unguaranteed residual assets Loans and leases receivable 10,010 10,010 Deferred initial direct costs Loans and leases receivable 1,231 1,213 Unearned income Loans and leases receivable (14,076) (11,891) Net investment in direct financing leases $ 212,148 $ 205,674 Operating leases Investment in operating leases Other assets $ 278,379 $ 282,208 Accumulated depreciation Other assets (78,739) (77,672) Deferred initial direct costs Other assets 1,116 1,192 Net investment in operating leases 200,756 205,728 Total lease assets $ 412,904 $ 411,402 Maturities of operating and direct financing lease receivables were as follows at March 31, 2024: (amounts in thousands) Operating leases Direct financing leases 2024 $ 32,330 $ 38,847 2025 39,137 45,807 2026 44,812 38,092 2027 33,566 33,108 2028 53,255 23,609 Thereafter 25,654 19,850 Total minimum payments $ 228,754 199,313 Less: interest 1,126 Present value of lease receivables $ 198,187

Deposits

Deposits	3 Months Ended
	Mar. 31, 2024
Deposit [Abstract]
Deposits	DEPOSITS The components of deposits at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 December 31, 2023 (amounts in thousands) Demand, non-interest bearing $ 4,688,880 $ 4,422,494 Demand, interest bearing 5,661,775 5,580,527 Savings, including money market deposit accounts 5,428,217 4,629,336 Time 2,182,511 3,287,879 Total deposits $ 17,961,383 $ 17,920,236 The scheduled maturities for time deposits at March 31, 2024 were as follows: (amounts in thousands) March 31, 2024 2024 $ 1,300,535 2025 264,437 2026 361,940 2027 117,773 2028 137,768 Thereafter 58 Total time deposits $ 2,182,511 Time deposits greater than the FDIC limit of $250,000 totaled $238.5 million and $186.3 million at March 31, 2024 and December 31, 2023, respectively. Demand deposit overdrafts reclassified as loans were $1.6 million and $1.2 million at March 31, 2024 and December 31, 2023, respectively. At March 31, 2024 and December 31, 2023, the Bank had $1.1 billion in deposits, to which it had pledged $1.1 billion of available borrowing capacity through the FHLB to the depositors through a standby letter of credit arrangement.

Borrowings

Borrowings	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Borrowings	BORROWINGS Short-term debt There were no short-term debt outstanding at March 31, 2024 and December 31, 2023. The following is a summary of additional information relating to Customers’ short-term debt: (dollars in thousands) March 31, 2024 (1) December 31, 2023 (2) FRB advances Maximum outstanding at any month end $ — $ — Average balance during the period — 120,099 Weighted-average interest rate during the period — % 5.23 % FHLB advances Maximum outstanding at any month end — — Average balance during the period — 87,407 Weighted-average interest rate during the period — % 5.16 % Federal funds purchased Maximum outstanding at any month end — — Average balance during the period — 3,781 Weighted-average interest rate during the period — % 4.97 % (1) For the three months ended March 31, 2024. (2) For the year ended December 31, 2023. At March 31, 2024 and December 31, 2023, Customers Bank had aggregate availability under federal funds lines totaling $1.7 billion. Long-term debt FHLB and FRB advances Long-term FHLB and FRB advances at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 December 31, 2023 (dollars in thousands) Amount Rate Amount Rate FHLB advances (1)(2) $ 1,195,088 3.91 % $ 1,203,207 3.91 % Total long-term FHLB and FRB advances $ 1,195,088 $ 1,203,207 (1) Amounts reported in the above table include a fixed rate long-term advance from FHLB of $250.0 million with a maturity of June 2024 and a returnable option that can be repaid without penalty on certain predetermined dates at Customers Bank’s option, and fixed rate long-term advances of $950.0 million with maturities ranging from March 2025 to March 2028, at March 31, 2024. (2) Includes $(4.9) million and $3.2 million of unamortized basis adjustments from interest rate swaps designated as fair value hedges of long-term advances from FHLB at March 31, 2024 and December 31, 2023, respectively. Refer to NOTE 14 — DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES for additional information. Maturities of long-term FHLB advances were as follows at March 31, 2024: March 31, 2024 (dollars in thousands) Amount (1) Rate 2024 $ 250,000 3.44 % 2025 200,000 4.45 % 2026 200,000 4.32 % 2027 450,000 3.70 % 2028 100,000 4.19 % Thereafter — — % Total long-term FHLB advances $ 1,200,000 (1) Amounts reported in the above table include a fixed rate long-term advance from FHLB of $250.0 million with a maturity of June 2024 and a returnable option that can be repaid without penalty on certain predetermined dates at Customers Bank’s option. The maximum borrowing capacity with the FHLB and FRB at March 31, 2024 and December 31, 2023 was as follows: (amounts in thousands) March 31, 2024 December 31, 2023 Total maximum borrowing capacity with the FHLB $ 3,431,804 $ 3,474,347 Total maximum borrowing capacity with the FRB 4,082,885 3,436,000 Qualifying loans and securities serving as collateral against FHLB and FRB advances 9,339,657 8,575,137 Senior and Subordinated Debt Long-term senior notes and subordinated debt at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 December 31, 2023 (dollars in thousands) Issued by Ranking Carrying Amount Carrying Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior (1) $ 98,963 $ 98,928 2.875 % $ 100,000 August 2021 August 2031 100.000 % Customers Bancorp Senior 24,942 24,912 4.500 % 25,000 September 2019 September 2024 100.000 % Total other borrowings $ 123,905 $ 123,840 Customers Bancorp Subordinated (2)(3) $ 72,811 $ 72,766 5.375 % $ 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (2)(4) 109,489 109,464 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 182,300 $ 182,230 (1) The senior notes will bear an annual fixed rate of 2.875% until August 15, 2026. From August 15, 2026 until maturity, the notes will bear an annual interest rate equal to a benchmark rate, which is expected to be the three-month term SOFR, plus 235 basis points. Customers Bancorp has the ability to call the senior notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after August 15, 2026. (2) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (3) Customers Bancorp has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after December 30, 2029. (4) The subordinated notes will bear an annual fixed rate of 6.125% until June 26, 2024. From June 26, 2024 until maturity, the notes will bear an annual interest rate equal to the three-month LIBOR plus 344.3 basis points. Pursuant to the Adjustable Interest Rate (LIBOR) Act enacted by Congress on March 15, 2022, Customers will substitute three-month term SOFR plus a tenor spread adjustment of 26.161 basis points for three-month LIBOR as the benchmark reference rate in order to calculate the annual interest rate after June 26, 2024. Customers Bank has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after June 26, 2024.

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Shareholders' Equity	SHAREHOLDERS’ EQUITY Preferred Stock As of March 31, 2024 and December 31, 2023, Customers Bancorp has two series of preferred stock outstanding. The table below summarizes Customers’ issuances of preferred stock that remain outstanding at March 31, 2024 and December 31, 2023 and the dividends paid per share. (amounts in thousands except share and per share data) Shares at Carrying value at Initial Fixed Rate Date at which dividend rate becomes floating and earliest redemption date Floating rate of Three-Month SOFR (2) Plus: Dividend Paid Per Share in 2024 (1) Fixed-to-floating rate: Issue Date March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Series E April 28, 2016 2,300,000 2,300,000 $ 55,593 $ 55,593 6.45 % June 15, 2021 5.140 % $ 0.68 Series F September 16, 2016 3,400,000 3,400,000 82,201 82,201 6.00 % December 15, 2021 4.762 % $ 0.66 Totals 5,700,000 5,700,000 $ 137,794 $ 137,794 (1) For the three months ended March 31, 2024. (2) Pursuant to the Adjustable Interest Rate (LIBOR) Act enacted by Congress on March 15, 2022, Customers substituted three-month term SOFR plus a tenor spread adjustment of 26.161 basis points for three-month LIBOR as the benchmark reference rate on Series E and F Preferred Stock, plus 5.14% and 4.762%, respectively, beginning with dividends declared on October 25, 2023.

Regulatory Capital

Regulatory Capital	3 Months Ended
	Mar. 31, 2024
Regulatory Capital [Abstract]
Regulatory Capital	REGULATORY CAPITAL The Bank and the Bancorp are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet the minimum capital requirements can result in certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on Customers’ financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank and the Bancorp must meet specific capital guidelines that involve quantitative measures of their assets, liabilities and certain off-balance sheet items, as calculated under the regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Prompt corrective action provisions are not applicable to bank holding companies. In first quarter 2020, the U.S federal banking regulatory agencies permitted banking organizations to phase-in, for regulatory capital purposes, the day-one impact of the new CECL accounting rule on retained earnings over a period of three years. As part of its response to the impact of COVID-19, on March 31, 2020, the U.S. federal banking regulatory agencies issued an interim final rule that provided the option to temporarily delay certain effects of CECL on regulatory capital for two years, followed by a three-year transition period. The interim final rule allows banking organizations to delay for two years 100% of the day-one impact of adopting CECL and 25% of the cumulative change in the reported allowance for credit losses since adopting CECL. Customers has elected to adopt the interim final rule, which is reflected in the regulatory capital data presented below. The cumulative CECL capital transition impact as of December 31, 2021 which amounted to $61.6 million will be phased in at 25% per year beginning on January 1, 2022 through December 31, 2024. As of March 31, 2024, our regulatory capital ratios reflected 25%, or $15.4 million, benefit associated with the CECL transition provisions. Quantitative measures established by regulation to ensure capital adequacy require the Bank and the Bancorp to maintain minimum amounts and ratios (set forth in the following table) of common equity Tier 1, Tier 1, and total capital to risk-weighted assets, and Tier 1 capital to average assets (as defined in the regulations). At March 31, 2024 and December 31, 2023, the Bank and the Bancorp satisfied all capital requirements to which they were subject. Generally, to comply with the regulatory definition of adequately capitalized, or well capitalized, respectively, or to comply with the Basel III capital requirements, an institution must at least maintain the common equity Tier 1, Tier 1 and total risk-based capital ratios and the Tier 1 leverage ratio in excess of the related minimum ratios as set forth in the following table: Minimum Capital Levels to be Classified as: Actual Adequately Capitalized Well Capitalized Basel III Compliant (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of March 31, 2024: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,695,246 12.622 % $ 604,410 4.500 % N/A N/A $ 940,193 7.000 % Customers Bank $ 1,898,686 14.155 % $ 603,597 4.500 % $ 871,863 6.500 % $ 938,929 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,833,039 13.648 % $ 805,880 6.000 % N/A N/A $ 1,141,663 8.500 % Customers Bank $ 1,898,686 14.155 % $ 804,797 6.000 % $ 1,073,062 8.000 % $ 1,140,128 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 2,129,343 15.854 % $ 1,074,506 8.000 % N/A N/A $ 1,410,290 10.500 % Customers Bank $ 2,122,179 15.822 % $ 1,073,062 8.000 % $ 1,341,328 10.000 % $ 1,408,394 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,833,039 8.512 % $ 861,350 4.000 % N/A N/A $ 861,350 4.000 % Customers Bank $ 1,898,686 8.824 % $ 860,686 4.000 % $ 1,075,857 5.000 % $ 860,686 4.000 % As of December 31, 2023: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,661,149 12.230 % $ 611,200 4.500 % N/A N/A $ 950,755 7.000 % Customers Bank $ 1,868,360 13.773 % $ 610,453 4.500 % $ 881,765 6.500 % $ 949,594 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,798,942 13.245 % $ 814,933 6.000 % N/A N/A $ 1,154,489 8.500 % Customers Bank $ 1,868,360 13.773 % $ 813,937 6.000 % $ 1,085,250 8.000 % $ 1,153,078 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 2,076,550 15.289 % $ 1,086,578 8.000 % N/A N/A $ 1,426,133 10.500 % Customers Bank $ 2,073,202 15.283 % $ 1,085,250 8.000 % $ 1,356,562 10.000 % $ 1,424,390 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,798,942 8.375 % $ 859,189 4.000 % N/A N/A $ 859,189 4.000 % Customers Bank $ 1,868,360 8.708 % $ 858,225 4.000 % $ 1,072,782 5.000 % $ 858,225 4.000 % The Basel III Capital Rules require that we maintain a 2.500% capital conservation buffer with respect to each of common equity Tier 1, Tier 1 and total capital to risk-weighted assets, which provides for capital levels that exceed the minimum risk-based capital adequacy requirements. A financial institution with a conservation buffer of less than the required amount is subject to limitations on capital distributions, including dividend payments and stock repurchases, and certain discretionary bonus payments to executive officers.

Disclosures About Fair Value of

Disclosures About Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Disclosures About Fair Value of Financial Instruments	DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS Customers uses fair value measurements to record fair value adjustments to certain assets and liabilities and to disclose the fair value of its financial instruments. ASC 825, Financial Instruments , requires disclosure of the estimated fair value of an entity’s assets and liabilities considered to be financial instruments. For Customers, as for most financial institutions, the majority of its assets and liabilities are considered to be financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and a willing seller engaging in an exchange transaction. For fair value disclosure purposes, Customers utilized certain fair value measurement criteria under ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), as explained below. In accordance with ASC 820, the fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for Customers’ various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. The fair value guidance provides a consistent definition of fair value, focusing on an exit price in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires the use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. The fair value guidance also establishes a fair value hierarchy and describes the following three levels used to classify fair value measurements. Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2: Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability. Level 3: Prices or valuation techniques that require adjustments to inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The following methods and assumptions were used to estimate the fair values of Customers’ financial instruments as of March 31, 2024 and December 31, 2023: Financial Instruments Recorded at Fair Value on a Recurring Basis Investment securities: The fair values of equity securities with a readily determinable fair value, AFS debt securities and debt securities reported at fair value based on a fair value option election are determined by obtaining quoted market prices on nationally recognized and foreign securities exchanges (Level 1), quoted prices in markets that are not active (Level 2), matrix pricing (Level 2), which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted market prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted prices, or internally and externally developed models that use unobservable inputs due to limited or no market activity of the instrument (Level 3). When quoted market prices are not available, Customers employs an independent pricing service that utilizes matrix pricing to calculate fair value. Such fair value measurements consider observable data such as dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayments speeds, credit information, and respective terms and conditions for debt instruments. Management maintains procedures to monitor the pricing service’s results and has an established process to challenge their valuations, or methodologies, that appear unusual or unexpected. Customers also utilizes internally and externally developed models that use unobservable inputs due to limited or no market activity of the instrument. These models use unobservable inputs that are inherently judgmental and reflect our best estimates of the assumptions a market participant would use to calculate fair value. Certain unobservable inputs in isolation may have either a directionally consistent or opposite impact on the fair value of the instrument for a given change in that input. When multiple inputs are used within the valuation techniques, a change in one input in a certain direction may be offset by an opposite change from another input. These assets are classified as Level 1, 2 or 3 fair values, based upon the lowest level of input that is significant to the fair value measurements. Loans held for sale - Residential mortgage loans (fair value option): Customers generally estimates the fair values of residential mortgage loans held for sale based on commitments on hand from investors within the secondary market for loans with similar characteristics. These assets are classified as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements. Loans held for sale - Consumer other installment loans (fair value option): The fair value of medical installment loans within consumer other installment loans is the amount of cash initially advanced to fund the loan, as specified in the agreement with a fintech company, and generally held for up to 90 days prior to sale. These assets are classified as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements. Loans receivable - Mortgage finance loans (fair value option): The fair value of mortgage finance loans is the amount of cash initially advanced to fund the mortgage, plus accrued interest and fees, as specified in the respective agreements. The loan is used by mortgage companies as short-term bridge financing between the funding of the mortgage loans and the finalization of the sale of the loans to an investor. Changes in fair value are not generally expected to be recognized because at inception of the transaction the underlying mortgage loans have already been sold to an approved investor. Additionally, the interest rate is variable, and the transaction is short-term, with an average life of under 30 days from purchase to sale. These assets are classified as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements. Derivatives (assets and liabilities): The fair values of interest rate swaps, interest rate caps and credit derivatives are determined using models that incorporate readily observable market data into a market standard methodology. This methodology nets the discounted future cash receipts and the discounted expected cash payments. The discounted variable cash receipts and payments are based on expectations of future interest rates derived from observable market interest rate curves. In addition, fair value is adjusted for the effect of nonperformance risk by incorporating credit valuation adjustments for Customers and its counterparties. These assets and liabilities are classified as Level 2 fair values, based upon the lowest level of input that is significant to the fair value measurements. Derivative assets and liabilities are presented in other assets and accrued interest payable and other liabilities on the consolidated balance sheet. Financial Instruments Recorded at Fair Value on a Nonrecurring Basis Collateral-dependent loans: Collateral-dependent loans are those loans that are accounted for under ASC 326, Financial Instruments - Credit Losses (“ASC 326”), in which the Bank has measured impairment generally based on the fair value of the loan’s collateral or DCF analysis. Fair value is generally determined based upon independent third-party appraisals of the properties that collateralize the loans, DCF based upon the expected proceeds, sales agreements or letters of intent with third parties. These assets are generally classified as Level 3 fair values, based upon the lowest level of input that is significant to the fair value measurements. The following information should not be interpreted as an estimate of Customers’ fair value in its entirety because fair value calculations are only provided for a limited portion of Customers’ assets and liabilities. Due to a wide range of valuation techniques and the degree of subjectivity used in making these estimates, comparisons between Customers’ disclosures and those of other companies may not be meaningful. The estimated fair values of Customers’ financial instruments at March 31, 2024 and December 31, 2023 were as follows: Fair Value Measurements at March 31, 2024 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 3,701,120 $ 3,701,120 $ 3,701,120 $ — $ — Debt securities, available for sale 2,571,139 2,571,139 — 2,542,876 28,263 Debt securities, held to maturity 1,032,037 972,628 — 465,025 507,603 Loans held for sale 357,640 357,640 — 870 356,770 Total loans and leases receivable, net of allowance for credit losses on loans and leases 12,765,935 12,551,635 — 962,610 11,589,025 FHLB, Federal Reserve Bank, and other restricted stock 100,067 100,067 — 100,067 — Derivatives 21,437 21,437 — 21,360 77 Liabilities: Deposits $ 17,961,383 $ 17,958,161 $ 15,778,872 $ 2,179,289 $ — FHLB advances 1,195,088 1,180,285 — 1,180,285 — Other borrowings 123,905 105,761 — 105,761 — Subordinated debt 182,300 163,417 — 163,417 — Derivatives 31,958 31,958 — 31,958 — Fair Value Measurements at December 31, 2023 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 3,846,346 $ 3,846,346 $ 3,846,346 $ — $ — Debt securities, available for sale 2,376,860 2,376,860 — 2,341,911 34,949 Debt securities, held to maturity 1,103,170 1,046,439 — 472,311 574,128 Loans held for sale 340,317 340,317 — 1,215 339,102 Total loans and leases receivable, net of allowance for credit losses on loans and leases 12,726,456 12,513,386 — 897,912 11,615,474 FHLB, Federal Reserve Bank, and other restricted stock 109,548 109,548 — 109,548 — Derivatives 17,931 17,931 — 17,906 25 Liabilities: Deposits $ 17,920,236 $ 17,922,005 $ 14,632,357 $ 3,289,648 $ — FHLB advances 1,203,207 1,188,517 — 1,188,517 — Other borrowings 123,840 103,674 — 103,674 — Subordinated debt 182,230 164,233 — 164,233 — Derivatives 27,110 27,110 — 27,110 — For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 29,971 $ 28,263 $ 58,234 Agency-guaranteed residential mortgage-backed securities — 86,412 — 86,412 Agency-guaranteed residential collateralized mortgage obligations — 124,958 — 124,958 Agency-guaranteed commercial collateralized mortgage obligations — 33,774 — 33,774 Collateralized loan obligations — 584,495 — 584,495 Commercial mortgage-backed securities — 112,626 — 112,626 Corporate notes — 610,470 — 610,470 Private label collateralized mortgage obligations — 960,170 — 960,170 Derivatives — 21,360 77 21,437 Loans held for sale – fair value option — 870 219,015 219,885 Loans receivable, mortgage finance – fair value option — 962,610 — 962,610 Total assets – recurring fair value measurements $ — $ 3,527,716 $ 247,355 $ 3,775,071 Liabilities Derivatives $ — $ 31,958 $ — $ 31,958 Measured at Fair Value on a Nonrecurring Basis: Assets Collateral-dependent loans $ — $ — $ 7,747 $ 7,747 Total assets – nonrecurring fair value measurements $ — $ — $ 7,747 $ 7,747 December 31, 2023 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 57,680 $ 34,949 $ 92,629 Agency-guaranteed residential collateralized mortgage obligations — 116,908 — 116,908 Collateralized loan obligations — 489,092 — 489,092 Commercial mortgage-backed securities — 121,636 — 121,636 Corporate notes — 583,034 — 583,034 Private label collateralized mortgage obligations — 973,561 — 973,561 Derivatives — 17,906 25 17,931 Loans held for sale – fair value option — 1,215 188,062 189,277 Loans receivable, mortgage finance – fair value option — 897,912 — 897,912 Total assets – recurring fair value measurements $ — $ 3,258,944 $ 223,036 $ 3,481,980 Liabilities Derivatives $ — $ 27,110 $ — $ 27,110 Measured at Fair Value on a Nonrecurring Basis: Assets Collateral-dependent loans $ — $ — $ 2,373 $ 2,373 Total assets – nonrecurring fair value measurements $ — $ — $ 2,373 $ 2,373 The changes in asset-backed securities (Level 3 assets) measured at fair value on a recurring basis for the three months ended March 31, 2024 and 2023 are summarized in the table below. Asset-backed securities (amounts in thousands) Three Months Ended March 31, 2024 2023 Balance at January 1 $ 34,949 $ 73,266 Principal payments and premium amortization (7,114) (11,216) Increase in allowance for credit losses — (273) Decrease in allowance for credit losses 33 61 Change in fair value recognized in OCI 395 1,538 Balance at March 31 $ 28,263 $ 63,376 The changes in other installment loans (Level 3 assets) measured at fair value on a recurring basis, based on an election made to account for the loans at fair value for the three months ended March 31, 2024 and 2023 are summarized in the table below. Other Installment Loans (amounts in thousands) Three Months Ended March 31, 2024 2023 Balance at January 1 $ 188,062 $ — Originations 235,431 — Sales (158,215) — Principal payments (46,263) — Change in fair value recognized in earnings — — Balance at March 31 $ 219,015 $ — There were no transfers between levels during the three months ended March 31, 2024 and 2023. The following tables summarize financial assets and financial liabilities measured at fair value as of March 31, 2024 and December 31, 2023 on a recurring and nonrecurring basis for which Customers utilized Level 3 inputs to measure fair value. The unobservable Level 3 inputs noted below contain a level of uncertainty that may differ from what is realized in an immediate settlement of the assets. Therefore, Customers may realize a value higher or lower than the current estimated fair value of the assets. Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Technique Unobservable Input Range March 31, 2024 Asset-backed securities $ 28,263 Discounted cash flow Discount rate Annualized loss rate Constant prepayment rate 10% - 13% (12%) 3% - 15% (6%) 10% - 30% (26%) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Technique Unobservable Input Range December 31, 2023 Asset-backed securities $ 34,949 Discounted cash flow Discount rate Annualized loss rate Constant prepayment rate 12% - 14% (13%) 3% - 13% (5%) 11% - 30% (26%)

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Risk Management Objectives of Using Derivatives Customers is exposed to certain risks arising from both its business operations and economic conditions. Customers manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources, and durations of its assets and liabilities. Specifically, Customers enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates. Customers’ derivative financial instruments are used to manage differences in the amount, timing, and duration of Customers’ known or expected cash receipts and its known or expected cash payments principally related to certain borrowings and deposits. Customers also has interest-rate derivatives resulting from an accommodation provided to certain qualifying customers, and therefore, they are not used to manage Customers’ interest-rate risk in assets or liabilities. Customers manages a matched book with respect to its derivative instruments used in this customer service in order to minimize its net risk exposure resulting from such transactions. Fair Value Hedges of Benchmark Interest-Rate Risk Customers is exposed to changes in the fair value of certain of its fixed rate AFS debt securities, deposits and FHLB advances due to changes in the benchmark interest rate. Customers uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rate such as the Fed Funds Effective Swap Rate. Interest rate swaps designated as fair value hedges of certain fixed rate AFS debt securities involve the payment of fixed-rate amounts to a counterparty in exchange for Customers receiving variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. Interest rate swaps designated as fair value hedges of certain deposits and FHLB advances involve the payment of variable-rate amounts to a counterparty in exchange for Customers receiving fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount. For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in net interest income. At March 31, 2024, Customers had six outstanding interest rate derivatives with notional amounts totaling $472.5 million that were designated as fair value hedges of certain AFS debt securities and FHLB advances. During the year ended December 31, 2023, Customers entered into five interest rate derivatives with notional amounts totaling $1.0 billion, two of which were terminated with notional amounts totaling $550.0 million that were designated as fair value hedges of certain deposits and FHLB advances resulting in $4.6 million of basis adjustments being amortized over the remaining terms of the hedged items as a reduction in interest expense. At December 31, 2023, Customers had six outstanding interest rate derivatives with notional amounts totaling $472.5 million that were designated as fair value hedges of certain AFS debt securities and FHLB advances. As of March 31, 2024 and December 31, 2023, the following amounts were recorded on the consolidated balance sheet related to cumulative basis adjustments for fair value hedges. Amortized Cost Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items (amounts in thousands) March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 AFS debt securities $ 22,500 $ 22,500 $ 764 $ 941 Deposits 300,000 300,000 1,079 1,432 FHLB advances 700,000 700,000 (4,912) 3,206 Derivatives Not Designated as Hedging Instruments Customers executes interest rate swaps (typically the loan customers will swap a floating-rate loan for a fixed-rate loan) and interest rate caps with commercial banking customers to facilitate their respective risk management strategies. The customer interest rate swaps and interest rate caps are simultaneously offset by interest rate swaps and interest rate caps that Customers executes with a third party in order to minimize interest-rate risk exposure resulting from such transactions. As the interest rate swaps and interest rate caps associated with this program do not meet the hedge accounting requirements, changes in the fair value of both the customer swaps and caps and the offsetting third-party market swaps and caps are recognized directly in earnings. At March 31, 2024, Customers had 128 interest rate swaps with an aggregate notional amount of $1.2 billion and two interest rate caps with an aggregated notional amount of $55.6 million related to this program. At December 31, 2023, Customers had 132 interest rate swaps with an aggregate notional amount of $1.2 billion and two interest rate caps with an aggregate notional amount of $55.6 million related to this program. Fair Value of Derivative Instruments on the Balance Sheet The following tables present the fair value of Customers’ derivative financial instruments as well as their presentation on the consolidated balance sheets as of March 31, 2024 and December 31, 2023. March 31, 2024 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives not designated as hedging instruments: Interest rate swaps and caps (1) Other assets $ 21,359 Other liabilities $ 31,956 December 31, 2023 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives not designated as hedging instruments: Interest rate swaps and caps (1) Other assets $ 17,903 Other liabilities $ 27,097 (1) Customers’ centrally cleared derivatives are legally settled through variation margin payments and these payments are reflected as a reduction of the related derivative asset or liability, including accrued interest, on the consolidated balance sheet. Effect of Derivative Instruments on Net Income The following table presents amounts included in the consolidated statements of income related to derivatives designated as fair value hedges and derivatives not designated as hedges for the three months ended March 31, 2024 and 2023. Amount of Income (Loss) Recognized in Earnings Three Months Ended March 31, (amounts in thousands) Income Statement Location 2024 2023 Derivatives designated as fair value hedges: Recognized on interest rate swaps Net interest income $ 8,173 $ (301) Recognized on hedged AFS debt securities Net interest income (177) 301 Recognized on hedged FHLB advances Net interest income (7,996) — Total $ — $ — Derivatives not designated as hedging instruments: Interest rate swaps and caps Other non-interest income $ 672 $ (24) Credit-risk-related Contingent Features By entering into derivative contracts, Customers is exposed to credit risk. The credit risk associated with derivatives executed with customers is the same as that involved in extending the related loans and is subject to the same standard credit policies. To mitigate the credit-risk exposure to major derivative dealer counterparties, Customers only enters into agreements with those counterparties that maintain credit ratings of high quality or with central clearing parties. Agreements with major derivative dealer counterparties contain provisions whereby default on any of Customers’ indebtedness would be considered a default on its derivative obligations. Customers also has entered into agreements that contain provisions under which the counterparty could require Customers to settle its obligations if Customers fails to maintain its status as a well/adequately capitalized institution. As of March 31, 2024, the fair value of derivatives in a net asset position related to these agreements was $19.8 million. In addition, Customers, which has collateral posting thresholds with certain of these counterparties, had received $20.9 million of cash as collateral at March 31, 2024. Customers records cash posted or received as collateral with these counterparties, except with a central clearing entity, as a reduction or an increase in the outstanding balance of cash and cash equivalents and an increase in the balance of other assets or other liabilities. Disclosures about Offsetting Assets and Liabilities The following tables present derivative instruments that are subject to enforceable master netting arrangements. Customers’ interest rate swaps and interest rate caps with institutional counterparties are subject to master netting arrangements and are included in the tables below. Interest rate swaps and interest rate caps with commercial banking customers are not subject to master netting arrangements and are excluded from the tables below. Customers has not made a policy election to offset its derivative positions. Gross Amounts Recognized on the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount (amounts in thousands) Financial Instruments Cash Collateral Received/Posted March 31, 2024 Interest rate derivative assets with institutional counterparties $ 20,701 $ (929) $ (19,772) $ — Interest rate derivative liabilities with institutional counterparties $ 929 $ (929) $ — $ — Gross Amounts Recognized on the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount (amounts in thousands) Financial Instruments Cash Collateral Received/Posted December 31, 2023 Interest rate derivative assets with institutional counterparties $ 17,439 $ (500) $ (16,939) $ — Interest rate derivative liabilities with institutional counterparties $ 500 $ (500) $ — $ —

Loss Contingencies

Loss Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Loss Contingencies	LOSS CONTINGENCIES Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are any such matters that will have a material effect on the consolidated financial statements that are not currently accrued for. However, in light of the uncertainties inherent in these matters, it is possible that the ultimate resolution may have a material adverse effect on Customers’ results of operations for a particular period, and future changes in circumstances or additional information could result in accruals or resolution in excess of established accruals, which could adversely affect Customers’ results of operations, potentially materially.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 49,726	$ 53,721

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Significant Accounting Polici_2

Significant Accounting Policies and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The interim unaudited consolidated financial statements have been prepared in conformity with U.S. GAAP and pursuant to the rules and regulations of the SEC. These interim unaudited consolidated financial statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present a fair statement of the financial position and the results of operations and cash flows of Customers Bancorp and subsidiaries for the interim periods presented. Certain information and footnote disclosures normally included in the annual consolidated financial statements have been omitted from these interim unaudited consolidated financial statements as permitted by SEC rules and regulations. The December 31, 2023 consolidated balance sheet presented in this report has been derived from Customers Bancorp’s audited 2023 consolidated financial statements. Management believes that the disclosures are adequate to present fairly the consolidated financial statements as of the dates and for the periods presented. These interim unaudited consolidated financial statements should be read in conjunction with the 2023 consolidated financial statements of Customers Bancorp and subsidiaries included in Customers’ Annual Report on Form 10-K for the year ended December 31, 2023 filed with the SEC on February 29, 2024 (the “2023 Form 10-K”). The 2023 Form 10-K describes Customers Bancorp’s significant accounting policies. There have been no material changes to Customers Bancorp’s significant accounting policies noted above for the three months ended March 31, 2024.
Recently Issued Accounting Standards and Accounting Standards Issued But Not Yet Adopted	Recently Issued Accounting Standards Presented below are recently issued accounting standards that Customers has adopted as well as those that the FASB has issued but are not yet effective. Accounting Standards Adopted in 2024 Standard Summary of Guidance Effects on Financial Statements ASU 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions Issued June 2022 • Clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and not considered in measuring fair value. • Prohibits recognition and measurement of a contractual sale restriction on the sale of an equity security as a separate unit of account. • Provides disclosure requirements for the equity securities subject to contractual sale restrictions. • Effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been issued or made available for issuance. • Customers adopted this guidance on January 1, 2024. This guidance did not have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. ASU 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method Issued March 2023 • Provides an election to account for tax equity investments, regardless of the tax credit program, using the proportional amortization method provided that certain conditions are met. • Customers adopted this guidance on January 1, 2024. This guidance did not have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. Accounting Standards Issued But Not Yet Adopted Standard Summary of Guidance Effects on Financial Statements ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures Issued November 2023 • Requires a public entity, including a public entity that has a single reportable segment to disclose, on an annual and interim basis, all disclosures required by the amendments in this ASU and all existing disclosures in ASC 280. • Requires disclosures of significant segment expenses included within each reportable segment’s profit or loss that are regularly provided to the CODM, an amount for other segment items by reportable segment and a description of its composition, the title and position of the CODM and an explanation of how the CODM uses the reported measure of segment profit or loss. • Clarifies that more than one measure of a segment’s profit or loss may be reported if the CODM uses them in assessing segment performance and deciding how to allocate resources, provided that at least one of the reported segment profit or loss measure is consistent with the measurement principles used in measuring the corresponding amounts in the entity’s consolidated financial statements. • Effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. • Customers is currently evaluating the expected impact of this ASU on Customers’ consolidated financial statements. ASU 2023-08, Intangibles - Goodwill and Other - Crypto Assets (Subtopic 250-60) Issued December 2023 • Requires crypto assets meeting certain criteria to be subsequently measured at fair value with changes recognized in net income each reporting period. • Requires crypto assets measured at fair value to be presented separately from other intangible assets in the balance sheet and changes from the remeasurement of crypto assets separately from changes in the carrying amounts of other intangible assets in the income statement. • Requires cash receipts arising from crypto assets that are received as noncash consideration in the ordinary course of business and converted nearly immediately into cash as operating activities in the statement of cash flows. • Effective for fiscal years beginning after December 15, 2024, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been issued. • Customers does not expect this ASU to have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures Issued December 2023 • Requires public entities to disclose annually a tabular reconciliation of specific reconciling items, including those items exceeding five percent of the amount computed by multiplying income from continuing operations before income taxes by the statutory income tax rate, in the income tax rate reconciliation of the effective tax rate to the statutory tax rate. • Requires disclosures of income taxes paid, net of refunds received, disaggregated by federal, state and foreign taxes and by individual jurisdictions where income taxes paid is equal to or greater than five percent of total income taxes paid, net of refunds received. • Effective for fiscal years beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued. • Customers is currently evaluating the expected impact of this ASU on Customers’ consolidated financial statements.
Variable Interest Entity	Customers’ transactions with unconsolidated VIEs include sales of consumer installment loans and investments in the securities issued by the VIEs. Customers is not the primary beneficiary of the VIEs because Customers has no right to make decisions that will most significantly affect the economic performance of the VIEs. Customers’ continuing involvement with the unconsolidated VIEs is not significant. Customers’ continuing involvement is not considered to be significant where Customers only invests in securities issued by the VIE and was not involved in the design of the VIE or where Customers has transferred financial assets to the VIE for only cash consideration. Customers’ investments in the securities issued by the VIEs are classified as AFS or HTM debt securities on the consolidated balance sheets, and represent Customers' maximum exposure to loss.
Fair Value Measurement	Customers uses fair value measurements to record fair value adjustments to certain assets and liabilities and to disclose the fair value of its financial instruments. ASC 825, Financial Instruments , requires disclosure of the estimated fair value of an entity’s assets and liabilities considered to be financial instruments. For Customers, as for most financial institutions, the majority of its assets and liabilities are considered to be financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and a willing seller engaging in an exchange transaction. For fair value disclosure purposes, Customers utilized certain fair value measurement criteria under ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), as explained below. In accordance with ASC 820, the fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for Customers’ various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. The fair value guidance provides a consistent definition of fair value, focusing on an exit price in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires the use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. The fair value guidance also establishes a fair value hierarchy and describes the following three levels used to classify fair value measurements. Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2: Quoted prices in markets that are not active, or inputs that are observable either directly or indirectly, for substantially the full term of the asset or liability. Level 3: Prices or valuation techniques that require adjustments to inputs that are both significant to the fair value measurement and unobservable (i.e., supported with little or no market activity). A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.
Derivatives	Risk Management Objectives of Using Derivatives Customers is exposed to certain risks arising from both its business operations and economic conditions. Customers manages economic risks, including interest rate, liquidity and credit risk, primarily by managing the amount, sources, and durations of its assets and liabilities. Specifically, Customers enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates. Customers’ derivative financial instruments are used to manage differences in the amount, timing, and duration of Customers’ known or expected cash receipts and its known or expected cash payments principally related to certain borrowings and deposits. Customers also has interest-rate derivatives resulting from an accommodation provided to certain qualifying customers, and therefore, they are not used to manage Customers’ interest-rate risk in assets or liabilities. Customers manages a matched book with respect to its derivative instruments used in this customer service in order to minimize its net risk exposure resulting from such transactions.

Significant Accounting Polici_3

Significant Accounting Policies and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	Presented below are recently issued accounting standards that Customers has adopted as well as those that the FASB has issued but are not yet effective. Accounting Standards Adopted in 2024 Standard Summary of Guidance Effects on Financial Statements ASU 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions Issued June 2022 • Clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and not considered in measuring fair value. • Prohibits recognition and measurement of a contractual sale restriction on the sale of an equity security as a separate unit of account. • Provides disclosure requirements for the equity securities subject to contractual sale restrictions. • Effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been issued or made available for issuance. • Customers adopted this guidance on January 1, 2024. This guidance did not have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. ASU 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method Issued March 2023 • Provides an election to account for tax equity investments, regardless of the tax credit program, using the proportional amortization method provided that certain conditions are met. • Customers adopted this guidance on January 1, 2024. This guidance did not have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. Accounting Standards Issued But Not Yet Adopted Standard Summary of Guidance Effects on Financial Statements ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures Issued November 2023 • Requires a public entity, including a public entity that has a single reportable segment to disclose, on an annual and interim basis, all disclosures required by the amendments in this ASU and all existing disclosures in ASC 280. • Requires disclosures of significant segment expenses included within each reportable segment’s profit or loss that are regularly provided to the CODM, an amount for other segment items by reportable segment and a description of its composition, the title and position of the CODM and an explanation of how the CODM uses the reported measure of segment profit or loss. • Clarifies that more than one measure of a segment’s profit or loss may be reported if the CODM uses them in assessing segment performance and deciding how to allocate resources, provided that at least one of the reported segment profit or loss measure is consistent with the measurement principles used in measuring the corresponding amounts in the entity’s consolidated financial statements. • Effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. • Customers is currently evaluating the expected impact of this ASU on Customers’ consolidated financial statements. ASU 2023-08, Intangibles - Goodwill and Other - Crypto Assets (Subtopic 250-60) Issued December 2023 • Requires crypto assets meeting certain criteria to be subsequently measured at fair value with changes recognized in net income each reporting period. • Requires crypto assets measured at fair value to be presented separately from other intangible assets in the balance sheet and changes from the remeasurement of crypto assets separately from changes in the carrying amounts of other intangible assets in the income statement. • Requires cash receipts arising from crypto assets that are received as noncash consideration in the ordinary course of business and converted nearly immediately into cash as operating activities in the statement of cash flows. • Effective for fiscal years beginning after December 15, 2024, including interim periods within those fiscal years. Early adoption is permitted for both interim and annual financial statements that have not yet been issued. • Customers does not expect this ASU to have a material impact on Customers’ financial condition, results of operations and consolidated financial statements. ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures Issued December 2023 • Requires public entities to disclose annually a tabular reconciliation of specific reconciling items, including those items exceeding five percent of the amount computed by multiplying income from continuing operations before income taxes by the statutory income tax rate, in the income tax rate reconciliation of the effective tax rate to the statutory tax rate. • Requires disclosures of income taxes paid, net of refunds received, disaggregated by federal, state and foreign taxes and by individual jurisdictions where income taxes paid is equal to or greater than five percent of total income taxes paid, net of refunds received. • Effective for fiscal years beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued. • Customers is currently evaluating the expected impact of this ASU on Customers’ consolidated financial statements.

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Components of Earnings (Loss) Per Share	The following are the components and results of Customers’ earnings per common share calculations for the periods presented. Three Months Ended (amounts in thousands, except share and per share data) 2024 2023 Net income available to common shareholders $ 45,926 $ 50,265 Weighted-average number of common shares outstanding – basic 31,473,424 31,819,203 Share-based compensation plans 1,381,110 525,814 Weighted-average number of common shares – diluted 32,854,534 32,345,017 Basic earnings per common share $ 1.46 $ 1.58 Diluted earnings per common share 1.40 1.55
Anti-dilutive Securities Excluded from Computation of Earnings Per Share	The following are securities that could potentially dilute basic earnings per common share in future periods that were not included in the computation of diluted earnings per common share because either the performance conditions for certain of the share-based compensation awards have not been met or to do so would have been anti-dilutive for the periods presented. Three Months Ended 2024 2023 Anti-dilutive securities: Share-based compensation awards 1,680 850,725

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Loss) by Component (Tables)	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income (Loss)	The following tables present the changes in accumulated other comprehensive income (loss) by component for the three months ended March 31, 2024 and 2023. Amounts in parentheses indicate reductions to AOCI. Unrealized Gains (Losses) on Available for Sale Securities (1) Three Months Ended March 31, (amounts in thousands) 2024 2023 Balance at January 1 $ (136,569) $ (163,096) Unrealized gains (losses) arising during period, before tax 4,480 8,270 Income tax effect (1,138) (2,101) Other comprehensive income (loss) before reclassifications 3,342 6,169 Reclassification adjustments for (gains) losses included in net income, before tax 30 — Income tax effect (8) — Amounts reclassified from accumulated other comprehensive income (loss) to net income 22 — Amortization of unrealized loss on securities transferred from available for sale to held to maturity 1,206 872 Income tax effect (306) (221) Amortization of unrealized loss on securities transferred from available for sale to held to maturity 900 651 Net current-period other comprehensive income (loss) 4,264 6,820 Balance at March 31 $ (132,305) $ (156,276) (1) Reclassification amounts for AFS debt securities are reported as gain (loss) on sale of investment securities and amortization of unrealized losses on debt securities transferred from available-for-sale to held-to-maturity is reported within interest income on the consolidated statements of income.

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Approximate Fair Value of Investment Securities and Held-to-Maturity Securities	The amortized cost, approximate fair value and allowance for credit losses of investment securities at fair value as of March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 62,274 $ (450) $ — $ (3,590) $ 58,234 Agency-guaranteed residential mortgage-backed securities 86,227 — 299 (114) 86,412 Agency-guaranteed residential collateralized mortgage obligations 138,573 — — (13,615) 124,958 Agency-guaranteed commercial collateralized mortgage obligations 34,573 — 73 (872) 33,774 Collateralized loan obligations 593,236 — 55 (8,796) 584,495 Commercial mortgage-backed securities 114,445 — — (1,819) 112,626 Corporate notes 668,459 (4,619) — (53,370) 610,470 Private label collateralized mortgage obligations 1,017,587 — 628 (58,045) 960,170 Available for sale debt securities $ 2,715,374 $ (5,069) $ 1,055 $ (140,221) 2,571,139 Equity securities (2) 33,729 Total investment securities, at fair value $ 2,604,868 December 31, 2023 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale debt securities: Asset-backed securities $ 97,359 $ (483) $ 15 $ (4,262) $ 92,629 Agency-guaranteed residential collateralized mortgage obligations 129,589 — — (12,681) 116,908 Collateralized loan obligations 500,109 — 1 (11,018) 489,092 Commercial mortgage-backed securities 125,885 — — (4,249) 121,636 Corporate notes 636,880 (3,469) 79 (50,456) 583,034 Private label collateralized mortgage obligations 1,034,841 — 1,201 (62,481) 973,561 Available for sale debt securities $ 2,524,663 $ (3,952) $ 1,296 $ (145,147) 2,376,860 Equity securities (2) 28,780 Total investment securities, at fair value $ 2,405,640 (1) Accrued interest on AFS debt securities totaled $19.5 million and $14.7 million at March 31, 2024 and December 31, 2023, respectively, and is included in accrued interest receivable on the consolidated balance sheet. (2) Includes perpetual preferred stock issued by domestic banks and domestic bank holding companies and equity securities issued by fintech companies, without a readily determinable fair value, and CRA-qualified mutual fund shares at March 31, 2024 and December 31, 2023. No impairments or measurement adjustments have been recorded on the equity securities without a readily determinable fair value since acquisition. The amortized cost, approximate fair value and allowance for credit losses of investment securities held to maturity as of March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Net Carrying Value Gross Unrealized Gains Gross Unrealized Losses Fair Value Held to maturity debt securities: Asset-backed securities $ 509,690 $ — $ 509,690 $ 345 $ (2,432) $ 507,603 Agency-guaranteed residential mortgage-backed securities 7,001 — 7,001 — (1,087) 5,914 Agency-guaranteed commercial mortgage-backed securities 1,830 — 1,830 — (151) 1,679 Agency-guaranteed residential collateralized mortgage obligations 182,856 — 182,856 — (20,723) 162,133 Agency-guaranteed commercial collateralized mortgage obligations 146,001 — 146,001 — (21,535) 124,466 Private label collateralized mortgage obligations 184,659 — 184,659 — (13,826) 170,833 Total held to maturity debt securities $ 1,032,037 $ — $ 1,032,037 $ 345 $ (59,754) $ 972,628 December 31, 2023 (1) (amounts in thousands) Amortized Cost Allowance for Credit Losses Net Carrying Value Gross Unrealized Gains Gross Unrealized Losses Fair Value Held to maturity debt securities: Asset-backed securities $ 575,990 $ — $ 575,990 $ 202 $ (2,064) $ 574,128 Agency-guaranteed residential mortgage-backed securities 7,039 — 7,039 — (649) 6,390 Agency-guaranteed commercial mortgage-backed securities 1,850 — 1,850 — (134) 1,716 Agency-guaranteed residential collateralized mortgage obligations 186,636 — 186,636 — (19,049) 167,587 Agency-guaranteed commercial collateralized mortgage obligations 146,765 — 146,765 — (23,178) 123,587 Private label collateralized mortgage obligations 184,890 — 184,890 — (11,859) 173,031 Total held to maturity debt securities $ 1,103,170 $ — $ 1,103,170 $ 202 $ (56,933) $ 1,046,439 (1) Accrued interest on HTM debt securities totaled $2.6 million and $2.7 million at March 31, 2024 and December 31, 2023, respectively, and is included in accrued interest receivable on the consolidated balance sheet.
Gain (Loss) on Securities	The following table presents gross realized gains and realized losses from the sale of AFS debt securities for the three months ended March 31, 2024 and 2023: Three Months Ended March 31, (amounts in thousands) 2024 2023 Gross realized gains $ — $ — Gross realized losses (30) — Net realized gains (losses) on sale of available for sale debt securities $ (30) $ —
Summary of Available-for-Sale and Held-to-Maturity Debt Securities by Stated Maturity	The following table presents AFS debt securities by stated maturity. Debt securities backed by mortgages and other assets have expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and, therefore, these debt securities are classified separately with no specific maturity date: March 31, 2024 (amounts in thousands) Amortized Fair Due in one year or less $ 31,500 $ 26,852 Due after one year through five years 569,353 525,291 Due after five years through ten years 67,606 58,327 Asset-backed securities 62,274 58,234 Agency-guaranteed residential mortgage-backed securities 86,227 86,412 Agency-guaranteed residential collateralized mortgage obligations 138,573 124,958 Agency-guaranteed commercial collateralized mortgage obligations 34,573 33,774 Collateralized loan obligations 593,236 584,495 Commercial mortgage-backed securities 114,445 112,626 Private label collateralized mortgage obligations 1,017,587 960,170 Total available for sale debt securities $ 2,715,374 $ 2,571,139 The following table presents HTM debt securities by stated maturity, including debt securities backed by mortgages and other assets with expected maturities that differ from contractual maturities because borrowers have the right to call or prepay and, therefore, are classified separately with no specific maturity date: March 31, 2024 (amounts in thousands) Amortized Fair Asset-backed securities $ 509,690 $ 507,603 Agency-guaranteed residential mortgage-backed securities 7,001 5,914 Agency-guaranteed commercial mortgage-backed securities 1,830 1,679 Agency-guaranteed residential collateralized mortgage obligations 182,856 162,133 Agency-guaranteed commercial collateralized mortgage obligations 146,001 124,466 Private label collateralized mortgage obligations 184,659 170,833 Total held to maturity debt securities $ 1,032,037 $ 972,628
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value	Gross unrealized losses and fair value of Customers’ AFS debt securities for which an allowance for credit losses has not been recorded, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 Less Than 12 Months 12 Months or More Total (amounts in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale debt securities: Asset-backed securities $ — $ — $ 52,676 $ (3,261) $ 52,676 $ (3,261) Agency-guaranteed residential mortgage-backed securities 47,014 (114) — — 47,014 (114) Agency-guaranteed residential collateralized mortgage obligations 12,283 (105) 112,675 (13,510) 124,958 (13,615) Agency-guaranteed commercial collateralized mortgage obligations 26,582 (872) — — 26,582 (872) Collateralized loan obligations 114,173 (779) 429,799 (8,017) 543,972 (8,796) Commercial mortgage-backed securities — — 112,626 (1,819) 112,626 (1,819) Corporate notes 30,829 (532) 410,323 (36,201) 441,152 (36,733) Private label collateralized mortgage obligations 260,549 (8,133) 572,448 (49,912) 832,997 (58,045) Total $ 491,430 $ (10,535) $ 1,690,547 $ (112,720) $ 2,181,977 $ (123,255) December 31, 2023 Less Than 12 Months 12 Months or More Total (amounts in thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Available for sale debt securities: Asset-backed securities $ — $ — $ 64,029 $ (4,027) $ 64,029 $ (4,027) Agency-guaranteed residential collateralized mortgage obligations — — 116,908 (12,681) 116,908 (12,681) Collateralized loan obligations 29,241 (392) 438,551 (10,626) 467,792 (11,018) Commercial mortgage-backed securities — — 121,636 (4,249) 121,636 (4,249) Corporate notes 23,243 (1,147) 424,768 (33,764) 448,011 (34,911) Private label collateralized mortgage obligations 303,750 (11,243) 613,007 (51,417) 916,757 (62,660) Total $ 356,234 $ (12,782) $ 1,778,899 $ (116,764) $ 2,135,133 $ (129,546)
Debt Securities, Available-for-Sale, Allowance for Credit Loss	The following table presents the activity in the allowance for credit losses on AFS debt securities, by major security type, for the periods presented: Three Months Ended March 31, 2024 2023 (amounts in thousands) Asset-backed securities Corporate notes Total Asset-backed securities Corporate notes Total Balance at January 1 $ 483 $ 3,469 $ 3,952 $ 578 $ — $ 578 Credit losses on securities for which credit losses were not previously recorded — 502 502 — 1,383 1,383 Credit losses on previously impaired securities — 648 648 273 — 273 Decrease in allowance for credit losses on previously impaired securities (33) — (33) (61) — (61) Balance at March 31 $ 450 $ 4,619 $ 5,069 $ 790 $ 1,383 $ 2,173
Debt Securities, Held-to-Maturity, Credit Quality Indicator	The following table presents the amortized cost of HTM debt securities based on their lowest credit rating available: March 31, 2024 (amounts in thousands) AAA AA Not Rated Total Held to maturity debt securities: Asset-backed securities $ — $ — $ 509,690 $ 509,690 Agency-guaranteed residential mortgage-backed securities — — 7,001 7,001 Agency-guaranteed commercial mortgage-backed securities — — 1,830 1,830 Agency-guaranteed residential collateralized mortgage obligations — — 182,856 182,856 Agency-guaranteed commercial collateralized mortgage obligations — — 146,001 146,001 Private label collateralized mortgage obligations 66,371 44,429 73,859 184,659 Total held to maturity debt securities $ 66,371 $ 44,429 $ 921,237 $ 1,032,037

Loans Held for Sale (Tables)

Loans Held for Sale (Tables)	3 Months Ended
	Mar. 31, 2024
Receivable, Held-for-Sale [Abstract]
Composition of Loans Held for Sale	The composition of loans held for sale as of March 31, 2024 and December 31, 2023 was as follows: (amounts in thousands) March 31, 2024 December 31, 2023 Residential mortgage loans, at fair value $ 870 $ 1,215 Personal installment loans, at lower of cost or fair value 137,755 151,040 Other installment loans, at fair value 219,015 188,062 Total loans held for sale $ 357,640 $ 340,317

Loans and Leases Receivable a_2

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases (Tables)	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Schedule of Loans and Leases Receivable	The following table presents loans and leases receivable as of March 31, 2024 and December 31, 2023. (amounts in thousands) March 31, 2024 December 31, 2023 Loans and leases receivable: Commercial: Commercial and industrial: Specialized lending (1) $ 5,104,405 $ 5,006,693 Other commercial and industrial (2) 1,222,053 1,279,147 Multifamily 2,123,675 2,138,622 Commercial real estate owner occupied 806,278 797,319 Commercial real estate non-owner occupied 1,182,084 1,177,650 Construction 185,601 166,393 Total commercial loans and leases receivable 10,624,096 10,565,824 Consumer: Residential real estate 482,537 484,435 Manufactured housing 37,382 38,670 Installment: Personal 492,892 555,533 Other 299,714 319,393 Total consumer loans receivable 1,312,525 1,398,031 Loans and leases receivable 11,936,621 11,963,855 Loans receivable, mortgage finance, at fair value 962,610 897,912 Allowance for credit losses on loans and leases (133,296) (135,311) Total loans and leases receivable, net of allowance for credit losses on loans and leases (3) $ 12,765,935 $ 12,726,456 (1) Includes direct finance equipment leases of $212.1 million and $205.7 million at March 31, 2024 and December 31, 2023, respectively. (2) Includes PPP loans of $52.0 million and $74.7 million at March 31, 2024 and December 31, 2023, respectively. (3) Includes deferred (fees) costs and unamortized (discounts) premiums, net of $(20.4) million and $(22.7) million at March 31, 2024 and December 31, 2023, respectively.
Loans and Leases Receivable by Loan Type and Performance Status	The following tables summarize loans and leases receivable by loan and lease type and performance status as of March 31, 2024 and December 31, 2023: March 31, 2024 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (2) Total past due Loans and leases not past due (3)(4) Total loans and leases (4) Commercial and industrial, including specialized lending $ 5,910 $ 180 $ 2,624 $ 8,714 $ 6,265,787 $ 6,274,501 Multifamily 10,331 — 5,161 15,492 2,108,183 2,123,675 Commercial real estate owner occupied 3,135 — 8,883 12,018 794,260 806,278 Commercial real estate non-owner occupied 27,632 — 62 27,694 1,154,390 1,182,084 Construction — — — — 185,601 185,601 Residential real estate 11,289 786 4,300 16,375 466,162 482,537 Manufactured housing 629 401 2,775 3,805 33,577 37,382 Installment 7,824 4,960 6,958 19,742 772,864 792,606 Total $ 66,750 $ 6,327 $ 30,763 $ 103,840 $ 11,780,824 $ 11,884,664 December 31, 2023 (amounts in thousands) 30-59 Days past due (1) 60-89 Days past due (1) 90 Days or more past due (2) Total past due Loans and leases not past due (3) Total loans and leases (4) Commercial and industrial, including specialized lending $ 1,516 $ 322 $ 4,153 $ 5,991 $ 6,205,114 $ 6,211,105 Multifamily 16,003 — — 16,003 2,122,619 2,138,622 Commercial real estate owner occupied 449 3,814 5,827 10,090 787,229 797,319 Commercial real estate non-owner occupied 16,653 — — 16,653 1,160,997 1,177,650 Construction — — — — 166,393 166,393 Residential real estate 10,504 2,255 3,764 16,523 467,912 484,435 Manufactured housing 1,152 343 2,869 4,364 34,306 38,670 Installment 9,255 7,866 7,211 24,332 850,594 874,926 Total $ 55,532 $ 14,600 $ 23,824 $ 93,956 $ 11,795,164 $ 11,889,120 (1) Includes past due loans and leases that are accruing interest because collection is considered probable. (2) Includes loans amounting to $0.5 million as of March 31, 2024 and December 31, 2023 that are still accruing interest because collection is considered probable. (3) Loans and leases where next payment due is less than 30 days from the report date. The tables exclude PPP loans of $52.0 million, of which $2.7 million were 30-59 days past due and $32.3 million were 60 days or more past due as of March 31, 2024, and PPP loans of $74.7 million, of which $0.7 million were 30-59 days past due and $48.5 million were 60 days or more past due as of December 31, 2023. Claims for guarantee payments are submitted to the SBA for eligible PPP loans that are more than 60 days past due. (4) Includes PCD loans of $154.0 million and $157.2 million at March 31, 2024 and December 31, 2023, respectively.
Amortized Cost of Loans and Leases on Nonaccrual Status	The following table presents the amortized cost of loans and leases held for investment on nonaccrual status. March 31, 2024 December 31, 2023 (amounts in thousands) Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Nonaccrual loans with no related allowance Nonaccrual loans with related allowance Total nonaccrual loans Commercial and industrial, including specialized lending $ 3,322 $ 286 $ 3,608 $ 3,365 $ 1,071 $ 4,436 Multifamily 5,161 — 5,161 — — — Commercial real estate owner occupied 8,920 — 8,920 5,869 — 5,869 Commercial real estate non-owner occupied 62 — 62 — — — Residential real estate 7,664 425 8,089 6,685 117 6,802 Manufactured housing — 2,268 2,268 — 2,331 2,331 Installment — 6,958 6,958 — 7,211 7,211 Total $ 25,129 $ 9,937 $ 35,066 $ 15,919 $ 10,730 $ 26,649
Schedule of Allowance for Credit Losses on Loans and Leases	The changes in the ACL on loans and leases by loan and lease type for the three months ended March 31, 2024 and 2023 are presented in the tables below. (amounts in thousands) Commercial and industrial (1)(2) Multifamily Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended Ending Balance, December 31, 2023 $ 23,503 $ 16,343 $ 9,882 $ 16,859 $ 1,482 $ 6,586 $ 4,239 $ 56,417 $ 135,311 Charge-offs (5,396) (473) (22) — — (19) — (16,917) (22,827) Recoveries 1,724 — — — — 1 — 3,134 4,859 Provision (benefit) for credit losses on loans and leases 3,172 2,437 341 1,461 384 139 (79) 8,098 15,953 Ending Balance, $ 23,003 $ 18,307 $ 10,201 $ 18,320 $ 1,866 $ 6,707 $ 4,160 $ 50,732 $ 133,296 (amounts in thousands) Commercial and industrial (1)(2) Multifamily Commercial real estate owner occupied Commercial real estate non-owner occupied Construction Residential real estate Manufactured housing Installment Total Three Months Ended Ending Balance, December 31, 2022 $ 17,582 $ 14,541 $ 6,454 $ 11,219 $ 1,913 $ 6,094 $ 4,430 $ 68,691 $ 130,924 Charge-offs (160) — — (4,239) — — — (16,715) (21,114) Recoveries 231 — — 5 116 2 — 2,109 2,463 Provision (benefit) for credit losses on loans and leases 2,397 543 2,018 4,047 307 757 (91) 8,030 18,008 Ending Balance, $ 20,050 $ 15,084 $ 8,472 $ 11,032 $ 2,336 $ 6,853 $ 4,339 $ 62,115 $ 130,281 (1) Includes specialized lending. (2) PPP loans include an embedded credit enhancement from the SBA, which guarantees 100% of the principal and interest owed by the borrower provided that the SBA’s eligibility criteria are met. As a result, the eligible PPP loans do not have an ACL.
Summary of Loans Modified in Troubled Debt Restructurings and Related Recorded Investment	The following table presents the amortized cost of loans that were modified to borrowers experiencing financial difficulty for the three months ended March 31, 2024 and 2023, disaggregated by class of financing receivable and type of modification granted. Three Months Ended March 31, 2024 (dollars in thousands) Term Extension Payment Deferral Debt Forgiveness Interest Rate Reduction and Term Extension Total Percentage of Total by Financing Class Commercial and industrial, including specialized lending $ — $ 1,980 $ — $ — $ 1,980 0.03 % Multifamily — 10,688 — — 10,688 0.50 % Residential real estate — 57 — — 57 0.01 % Personal installment 3,747 198 36 — 3,981 0.50 % Total $ 3,747 $ 12,923 $ 36 $ — $ 16,706 Three Months Ended March 31, 2023 (dollars in thousands) Term Extension Payment Deferral Debt Forgiveness Interest Rate Reduction and Term Extension Total Percentage of Total by Financing Class Commercial and industrial, including specialized lending $ 172 $ — $ — $ — $ 172 0.00 % Commercial real estate owner occupied 169 — — — 169 0.02 % Manufactured housing 7 — — 63 70 0.16 % Personal installment 4,833 131 114 — 5,078 0.60 % Total $ 5,181 $ 131 $ 114 $ 63 $ 5,489 The following table summarizes the impacts of loan modifications made to borrowers experiencing financial difficulty for the three months ended March 31, 2024 and 2023. Three Months Ended March 31, 2024 Three Months Ended March 31, 2023 Weighted Average Weighted Average (dollars in thousands) Interest Rate Reduction (%) Term Extension Payment Deferral Debt Forgiven Interest Rate Reduction (%) Term Extension Payment Deferral Debt Forgiven Commercial and industrial, including specialized lending —% 0 3 $ — —% 4 0 $ — Multifamily — 0 12 — — 0 0 — Commercial real estate owner occupied — 0 0 — — 4 0 — Residential real estate — 0 5 — — 0 0 — Manufactured housing — 0 0 — 0.8 55 0 — Personal installment — 6 6 100 — 5 6 66 The performance of loans made to borrowers experiencing financial difficulty in which modifications were made is closely monitored to understand the effectiveness of modification efforts. Loans are considered to be in payment default at 90 days or more past due. The following table presents an aging analysis of loan modifications made to borrowers experiencing financial difficulty in the twelve months ended March 31, 2024 and the three months ended three months ended March 31, 2023. March 31, 2024 (dollars in thousands) 30-59 Days past due 60-89 Days past due 90 Days or more past due Current Total Commercial and industrial, including specialized lending $ 1,980 $ — $ — $ 15,348 $ 17,328 Multifamily — — — 10,688 10,688 Residential real estate 57 — — 46 103 Manufactured housing — 92 31 620 743 Personal installment 943 626 546 12,131 14,246 Total $ 2,980 $ 718 $ 577 $ 38,833 $ 43,108 March 31, 2023 (1) (dollars in thousands) 30-59 Days past due 60-89 Days past due 90 Days or more past due Current Total Commercial and industrial, including specialized lending $ — $ 172 $ — $ — $ 172 Commercial real estate owner occupied — — 169 — 169 Manufactured housing — — — 70 70 Personal installment 202 44 21 4,811 5,078 Total $ 202 $ 216 $ 190 $ 4,881 $ 5,489 (1) Customers adopted ASU 2022-02, Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures (“ASU 2022-02”) effective January 1, 2023, therefore, the March 31, 2023 balances only include loans since ASU 2022-02 became effective.
Credit Ratings of Covered and Non-Covered Loan Portfolio	The following tables present the credit ratings of loans and leases receivable and current period gross write-offs as of March 31, 2024 and December 31, 2023. Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2024 2023 2022 2021 2020 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Commercial and industrial loans and leases, including specialized lending: Pass $ 453,522 $ 1,023,266 $ 2,018,082 $ 471,404 $ 142,178 $ 60,734 $ 1,594,160 $ 343,934 $ 6,107,280 Special mention — 12,090 176 5,000 6,884 3,430 10,923 1,689 40,192 Substandard — 699 18,575 34,687 27,274 39,866 5,855 73 127,029 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 453,522 $ 1,036,055 $ 2,036,833 $ 511,091 $ 176,336 $ 104,030 $ 1,610,938 $ 345,696 $ 6,274,501 Commercial and industrial loans and leases charge-offs: Three Months Ended March 31, 2024 (1) $ 145 $ 484 $ 344 $ 3,397 $ 692 $ 334 $ — $ — $ 5,396 Multifamily loans: Pass $ — $ 850 $ 1,239,644 $ 344,966 $ 128,439 $ 284,391 $ — $ — $ 1,998,290 Special mention — — — — — 88,656 — — 88,656 Substandard — — — — — 36,729 — — 36,729 Doubtful — — — — — — — — — Total multifamily loans $ — $ 850 $ 1,239,644 $ 344,966 $ 128,439 $ 409,776 $ — $ — $ 2,123,675 Multifamily loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ 473 $ — $ — $ 473 Commercial real estate owner occupied loans: Pass $ 66,614 $ 34,503 $ 226,892 $ 178,805 $ 66,229 $ 152,046 $ — $ 11,288 $ 736,377 Special mention — — — — — 35,530 — — 35,530 Substandard — 2,944 — 15,385 — 16,042 — — 34,371 Doubtful — — — — — — — — — Total commercial real estate owner occupied loans $ 66,614 $ 37,447 $ 226,892 $ 194,190 $ 66,229 $ 203,618 $ — $ 11,288 $ 806,278 Commercial real estate owner occupied loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ 22 $ — $ — $ 22 Commercial real estate non-owner occupied loans: Pass $ 7,195 $ 16,791 $ 337,029 $ 103,661 $ 150,553 $ 456,456 $ — $ — $ 1,071,685 Special mention — — 5,380 — 20,570 415 — — 26,365 Substandard — — — — — 84,034 — — 84,034 Doubtful — — — — — — — — — Total commercial real estate non-owner occupied loans $ 7,195 $ 16,791 $ 342,409 $ 103,661 $ 171,123 $ 540,905 $ — $ — $ 1,182,084 Commercial real estate non-owner occupied loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ — $ — $ — $ — Construction loans: Pass $ 3,214 $ 14,234 $ 135,023 $ 25,541 $ — $ 3,967 $ — $ — $ 181,979 Special mention — 3,622 — — — — — — 3,622 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 3,214 $ 17,856 $ 135,023 $ 25,541 $ — $ 3,967 $ — $ — $ 185,601 Construction loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ — $ — $ — $ — Total commercial loans and leases receivable $ 530,545 $ 1,108,999 $ 3,980,801 $ 1,179,449 $ 542,127 $ 1,262,296 $ 1,610,938 $ 356,984 $ 10,572,139 Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2024 2023 2022 2021 2020 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Total commercial loans and leases receivable charge-offs: Three Months Ended March 31, 2024 $ 145 $ 484 $ 344 $ 3,397 $ 692 $ 829 $ — $ — $ 5,891 Residential real estate loans: Performing $ 4,437 $ 22,540 $ 171,091 $ 129,844 $ 6,339 $ 85,373 $ 55,093 $ — $ 474,717 Non-performing — — 1,066 1,776 226 4,747 5 — 7,820 Total residential real estate loans $ 4,437 $ 22,540 $ 172,157 $ 131,620 $ 6,565 $ 90,120 $ 55,098 $ — $ 482,537 Residential real estate loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ 19 $ — $ — $ 19 Manufactured housing loans: Performing $ — $ — $ — $ — $ — $ 35,185 $ — $ — $ 35,185 Non-performing — — — — — 2,197 — — 2,197 Total manufactured housing loans $ — $ — $ — $ — $ — $ 37,382 $ — $ — $ 37,382 Manufactured housing loans charge-offs: Three Months Ended March 31, 2024 $ — $ — $ — $ — $ — $ — $ — $ — $ — Installment loans: Performing $ 15,048 $ 227,664 $ 268,738 $ 132,929 $ 53,774 $ 36,543 $ 48,852 $ 7 $ 783,555 Non-performing — 3,628 3,065 1,363 351 481 163 — 9,051 Total installment loans $ 15,048 $ 231,292 $ 271,803 $ 134,292 $ 54,125 $ 37,024 $ 49,015 $ 7 $ 792,606 Installment loans charge-offs: Three Months Ended March 31, 2024 $ 1,072 $ 1,053 $ 6,220 $ 5,237 $ 1,273 $ 2,062 $ — $ — $ 16,917 Total consumer loans $ 19,485 $ 253,832 $ 443,960 $ 265,912 $ 60,690 $ 164,526 $ 104,113 $ 7 $ 1,312,525 Total consumer loans charge-offs: Three Months Ended March 31, 2024 $ 1,072 $ 1,053 $ 6,220 $ 5,237 $ 1,273 $ 2,081 $ — $ — $ 16,936 Loans and leases receivable $ 550,030 $ 1,362,831 $ 4,424,761 $ 1,445,361 $ 602,817 $ 1,426,822 $ 1,715,051 $ 356,991 $ 11,884,664 Loans and leases receivable charge-offs: Three Months Ended March 31, 2024 $ 1,217 $ 1,537 $ 6,564 $ 8,634 $ 1,965 $ 2,910 $ — $ — $ 22,827 (1) Charge-offs for the three months ended March 31, 2024 included $3.4 million of commercial and industrial loans originated under the PPP that were subsequently determined to be ineligible for SBA forgiveness and guarantee and were ultimately deemed uncollectible. Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2023 2022 2021 2020 2019 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Commercial and industrial loans and leases, including specialized lending: Pass $ 1,184,923 $ 1,909,592 $ 483,039 $ 170,384 $ 59,213 $ 63,480 $ 1,722,559 $ 384,947 $ 5,978,137 Special mention 18,000 3,377 5,127 1,986 — 595 7,916 2,903 39,904 Substandard 14,738 39,258 61,533 26,660 4,803 42,062 4,010 — 193,064 Doubtful — — — — — — — — — Total commercial and industrial loans and leases $ 1,217,661 $ 1,952,227 $ 549,699 $ 199,030 $ 64,016 $ 106,137 $ 1,734,485 $ 387,850 $ 6,211,105 Commercial and industrial loans and leases charge-offs: For the Year Ended December 31, 2023 (1)(2) $ 1,483 $ 381 $ 3,169 $ 10,348 $ 24 $ 1,510 $ — $ — $ 16,915 Multifamily loans: Pass $ 845 $ 1,229,198 $ 371,016 $ 127,493 $ 43,046 $ 253,806 $ — $ — $ 2,025,404 Special mention — — — — 6,468 67,035 — — 73,503 Substandard — — — — — 39,715 — — 39,715 Doubtful — — — — — — — — — Total multifamily loans $ 845 $ 1,229,198 $ 371,016 $ 127,493 $ 49,514 $ 360,556 $ — $ — $ 2,138,622 Multifamily loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 3,574 $ — $ — $ 3,574 Commercial real estate owner occupied loans: Pass $ 41,011 $ 254,878 $ 180,289 $ 77,821 $ 44,382 $ 120,248 $ — $ 11,318 $ 729,947 Special mention — — 15,432 — 35,691 47 — — 51,170 Substandard — — — — 347 15,855 — — 16,202 Doubtful — — — — — — — — Total commercial real estate owner occupied loans $ 41,011 $ 254,878 $ 195,721 $ 77,821 $ 80,420 $ 136,150 $ — $ 11,318 $ 797,319 Commercial real estate owner occupied loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 39 $ — $ — $ 39 Commercial real estate non-owner occupied loans: Pass $ 12,906 $ 325,881 $ 109,521 $ 152,227 $ 88,586 $ 367,996 $ — $ — $ 1,057,117 Special mention — — — 20,702 — 9,148 — — 29,850 Substandard — 10,910 — — 8,113 71,660 — — 90,683 Doubtful — — — — — — — — — Total commercial real estate non-owner occupied loans $ 12,906 $ 336,791 $ 109,521 $ 172,929 $ 96,699 $ 448,804 $ — $ — $ 1,177,650 Commercial real estate non-owner occupied loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 4,527 $ — $ — $ 4,527 Construction loans: Pass $ 17,594 $ 138,797 $ 2,567 $ — $ — $ 4,580 $ — $ 1,100 $ 164,638 Special mention 1,755 — — — — — — — 1,755 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total construction loans $ 19,349 $ 138,797 $ 2,567 $ — $ — $ 4,580 $ — $ 1,100 $ 166,393 Construction loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ — $ — $ — $ — Total commercial loans and leases receivable $ 1,291,772 $ 3,911,891 $ 1,228,524 $ 577,273 $ 290,649 $ 1,056,227 $ 1,734,485 $ 400,268 $ 10,491,089 Term Loans Amortized Cost Basis by Origination Year as of (amounts in thousands) 2023 2022 2021 2020 2019 Prior Revolving loans amortized cost basis Revolving loans converted to term Total Total commercial loans and leases receivable charge-offs: For the Year Ended December 31, 2023 $ 1,483 $ 381 $ 3,169 $ 10,348 $ 24 $ 9,650 $ — $ — $ 25,055 Residential real estate loans: Performing $ 22,613 $ 173,424 $ 131,621 $ 6,458 $ 15,508 $ 71,433 $ 56,844 $ — $ 477,901 Non-performing — 350 1,236 229 545 3,993 181 — 6,534 Total residential real estate loans $ 22,613 $ 173,774 $ 132,857 $ 6,687 $ 16,053 $ 75,426 $ 57,025 $ — $ 484,435 Residential real estate loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ 69 $ — $ — $ 69 Manufactured housing loans: Performing $ — $ — $ — $ — $ 98 $ 36,464 $ — $ — $ 36,562 Non-performing — — — — — 2,108 — — 2,108 Total manufactured housing loans $ — $ — $ — $ — $ 98 $ 38,572 $ — $ — $ 38,670 Manufactured housing loans charge-offs: For the Year Ended December 31, 2023 $ — $ — $ — $ — $ — $ — $ — $ — $ — Installment loans: Performing $ 253,958 $ 307,566 $ 158,381 $ 50,354 $ 39,953 $ 3,448 $ 51,480 $ — $ 865,140 Non-performing 2,634 4,102 1,751 546 477 86 190 — 9,786 Total installment loans $ 256,592 $ 311,668 $ 160,132 $ 50,900 $ 40,430 $ 3,534 $ 51,670 $ — $ 874,926 Installment loans charge-offs: For the Year Ended December 31, 2023 $ 7,728 $ 24,605 $ 23,984 $ 5,590 $ 6,797 $ 1,238 $ — $ — $ 69,942 Total consumer loans $ 279,205 $ 485,442 $ 292,989 $ 57,587 $ 56,581 $ 117,532 $ 108,695 $ — $ 1,398,031 Total consumer loans charge-offs: For the Year Ended December 31, 2023 $ 7,728 $ 24,605 $ 23,984 $ 5,590 $ 6,797 $ 1,307 $ — $ — $ 70,011 Loans and leases receivable $ 1,570,977 $ 4,397,333 $ 1,521,513 $ 634,860 $ 347,230 $ 1,173,759 $ 1,843,180 $ 400,268 $ 11,889,120 Loans and leases receivable charge-offs: For the Year Ended December 31, 2023 $ 9,211 $ 24,986 $ 27,153 $ 15,938 $ 6,821 $ 10,957 $ — $ — $ 95,066 (1) Excludes $6.2 million of charge-offs for certain PCD loans against $8.7 million of allowance for credit losses on PCD loans recognized upon acquisition of a venture banking loan portfolio (included within specialized lending) from the FDIC on June 15, 2023. These PCD loans were originated in years 2016 to 2022. (2) Charge-offs for the year ended December 31, 2023 included $10.7 million of commercial and industrial loans originated under the PPP that were subsequently determined to be ineligible for SBA forgiveness and guarantee and were ultimately deemed uncollectible.
Schedule of Loan Purchases and Sales	Purchases and sales of loans held for investment were as follows for the three months ended March 31, 2024 and 2023: Three Months Ended March 31, (amounts in thousands) 2024 2023 Purchases (1) Other commercial and industrial $ 7,403 $ 5,445 Commercial real estate owner occupied — 2,867 Residential real estate — 4,238 Total $ 7,403 $ 12,550 (1) Amounts reported in the above table are the unpaid principal balance at time of purchase. The purchase price was 100.0% and 101.9% of the loans’ unpaid principal balance for the three months ended March 31, 2024 and 2023, respectively.

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Lessee, Summary of Right-of-Use Assets and Lease Liabilities	The following table summarizes operating lease ROU assets and operating lease liabilities and their corresponding balance sheet location: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Operating lease ROU assets Other assets $ 16,741 $ 15,644 LIABILITIES Operating lease liabilities Other liabilities $ 18,987 $ 18,048
Lease, Cost	The following table summarizes operating lease cost and its corresponding income statement location for the periods presented: Three Months Ended March 31, (amounts in thousands) Classification 2024 2023 Operating lease cost (1) Occupancy expenses $ 1,185 $ 1,218 (1) There were no variable lease costs for the three months ended March 31, 2024 and 2023, and sublease income for operating leases was immaterial.
Maturities of Non-cancelable Operating Lease Liabilities	Maturities of non-cancelable operating lease liabilities were as follows at March 31, 2024: (amounts in thousands) March 31, 2024 2024 $ 3,683 2025 4,218 2026 3,462 2027 2,966 2028 2,600 Thereafter 3,667 Total minimum payments 20,596 Less: interest 1,609 Present value of lease liabilities $ 18,987
Summary of Lease Term and Discount Rate for Operating Leases	The following table summarizes the weighted average remaining lease term and discount rate for Customers’ operating leases at March 31, 2024 and December 31, 2023: March 31, 2024 December 31, 2023 Weighted average remaining lease term (years) Operating leases 5.7 years 5.6 years Weighted average discount rate Operating leases 3.51 % 3.28 %
Lessor, Lease Receivables and Investment in Operating Leases and their Corresponding Balance Sheet Location	The following table summarizes lease receivables and investment in operating leases and their corresponding balance sheet location at March 31, 2024 and December 31, 2023: (amounts in thousands) Classification March 31, 2024 December 31, 2023 ASSETS Direct financing leases Lease receivables Loans and leases receivable $ 198,187 $ 190,559 Guaranteed residual assets Loans and leases receivable 16,796 15,783 Unguaranteed residual assets Loans and leases receivable 10,010 10,010 Deferred initial direct costs Loans and leases receivable 1,231 1,213 Unearned income Loans and leases receivable (14,076) (11,891) Net investment in direct financing leases $ 212,148 $ 205,674 Operating leases Investment in operating leases Other assets $ 278,379 $ 282,208 Accumulated depreciation Other assets (78,739) (77,672) Deferred initial direct costs Other assets 1,116 1,192 Net investment in operating leases 200,756 205,728 Total lease assets $ 412,904 $ 411,402
Sales-type and Direct Financing Leases, Lease Receivable, Maturity	Maturities of operating and direct financing lease receivables were as follows at March 31, 2024: (amounts in thousands) Operating leases Direct financing leases 2024 $ 32,330 $ 38,847 2025 39,137 45,807 2026 44,812 38,092 2027 33,566 33,108 2028 53,255 23,609 Thereafter 25,654 19,850 Total minimum payments $ 228,754 199,313 Less: interest 1,126 Present value of lease receivables $ 198,187
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity	Maturities of operating and direct financing lease receivables were as follows at March 31, 2024: (amounts in thousands) Operating leases Direct financing leases 2024 $ 32,330 $ 38,847 2025 39,137 45,807 2026 44,812 38,092 2027 33,566 33,108 2028 53,255 23,609 Thereafter 25,654 19,850 Total minimum payments $ 228,754 199,313 Less: interest 1,126 Present value of lease receivables $ 198,187

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2024
Deposit [Abstract]
Components of Deposits	The components of deposits at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 December 31, 2023 (amounts in thousands) Demand, non-interest bearing $ 4,688,880 $ 4,422,494 Demand, interest bearing 5,661,775 5,580,527 Savings, including money market deposit accounts 5,428,217 4,629,336 Time 2,182,511 3,287,879 Total deposits $ 17,961,383 $ 17,920,236
Schedule of Time Deposit Maturities	The scheduled maturities for time deposits at March 31, 2024 were as follows: (amounts in thousands) March 31, 2024 2024 $ 1,300,535 2025 264,437 2026 361,940 2027 117,773 2028 137,768 Thereafter 58 Total time deposits $ 2,182,511

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Summary of Bancorp's Short-term Borrowings	The following is a summary of additional information relating to Customers’ short-term debt: (dollars in thousands) March 31, 2024 (1) December 31, 2023 (2) FRB advances Maximum outstanding at any month end $ — $ — Average balance during the period — 120,099 Weighted-average interest rate during the period — % 5.23 % FHLB advances Maximum outstanding at any month end — — Average balance during the period — 87,407 Weighted-average interest rate during the period — % 5.16 % Federal funds purchased Maximum outstanding at any month end — — Average balance during the period — 3,781 Weighted-average interest rate during the period — % 4.97 % (1) For the three months ended March 31, 2024. (2) For the year ended December 31, 2023.
Schedule of Long-term Debt	Long-term FHLB and FRB advances at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 December 31, 2023 (dollars in thousands) Amount Rate Amount Rate FHLB advances (1)(2) $ 1,195,088 3.91 % $ 1,203,207 3.91 % Total long-term FHLB and FRB advances $ 1,195,088 $ 1,203,207 (1) Amounts reported in the above table include a fixed rate long-term advance from FHLB of $250.0 million with a maturity of June 2024 and a returnable option that can be repaid without penalty on certain predetermined dates at Customers Bank’s option, and fixed rate long-term advances of $950.0 million with maturities ranging from March 2025 to March 2028, at March 31, 2024. (2) Includes $(4.9) million and $3.2 million of unamortized basis adjustments from interest rate swaps designated as fair value hedges of long-term advances from FHLB at March 31, 2024 and December 31, 2023, respectively. Refer to NOTE 14 — DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES for additional information. Maturities of long-term FHLB advances were as follows at March 31, 2024: March 31, 2024 (dollars in thousands) Amount (1) Rate 2024 $ 250,000 3.44 % 2025 200,000 4.45 % 2026 200,000 4.32 % 2027 450,000 3.70 % 2028 100,000 4.19 % Thereafter — — % Total long-term FHLB advances $ 1,200,000 (1) Amounts reported in the above table include a fixed rate long-term advance from FHLB of $250.0 million with a maturity of June 2024 and a returnable option that can be repaid without penalty on certain predetermined dates at Customers Bank’s option. The maximum borrowing capacity with the FHLB and FRB at March 31, 2024 and December 31, 2023 was as follows: (amounts in thousands) March 31, 2024 December 31, 2023 Total maximum borrowing capacity with the FHLB $ 3,431,804 $ 3,474,347 Total maximum borrowing capacity with the FRB 4,082,885 3,436,000 Qualifying loans and securities serving as collateral against FHLB and FRB advances 9,339,657 8,575,137 Senior and Subordinated Debt Long-term senior notes and subordinated debt at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 December 31, 2023 (dollars in thousands) Issued by Ranking Carrying Amount Carrying Amount Rate Issued Amount Date Issued Maturity Price Customers Bancorp Senior (1) $ 98,963 $ 98,928 2.875 % $ 100,000 August 2021 August 2031 100.000 % Customers Bancorp Senior 24,942 24,912 4.500 % 25,000 September 2019 September 2024 100.000 % Total other borrowings $ 123,905 $ 123,840 Customers Bancorp Subordinated (2)(3) $ 72,811 $ 72,766 5.375 % $ 74,750 December 2019 December 2034 100.000 % Customers Bank Subordinated (2)(4) 109,489 109,464 6.125 % 110,000 June 2014 June 2029 100.000 % Total subordinated debt $ 182,300 $ 182,230 (1) The senior notes will bear an annual fixed rate of 2.875% until August 15, 2026. From August 15, 2026 until maturity, the notes will bear an annual interest rate equal to a benchmark rate, which is expected to be the three-month term SOFR, plus 235 basis points. Customers Bancorp has the ability to call the senior notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after August 15, 2026. (2) The subordinated notes qualify as Tier 2 capital for regulatory capital purposes. (3) Customers Bancorp has the ability to call the subordinated notes, in whole, or in part, at a redemption price equal to 100% of the principal balance at certain times on or after December 30, 2029. (4)

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Schedule of Stock by Class	The table below summarizes Customers’ issuances of preferred stock that remain outstanding at March 31, 2024 and December 31, 2023 and the dividends paid per share. (amounts in thousands except share and per share data) Shares at Carrying value at Initial Fixed Rate Date at which dividend rate becomes floating and earliest redemption date Floating rate of Three-Month SOFR (2) Plus: Dividend Paid Per Share in 2024 (1) Fixed-to-floating rate: Issue Date March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Series E April 28, 2016 2,300,000 2,300,000 $ 55,593 $ 55,593 6.45 % June 15, 2021 5.140 % $ 0.68 Series F September 16, 2016 3,400,000 3,400,000 82,201 82,201 6.00 % December 15, 2021 4.762 % $ 0.66 Totals 5,700,000 5,700,000 $ 137,794 $ 137,794 (1) For the three months ended March 31, 2024. (2) Pursuant to the Adjustable Interest Rate (LIBOR) Act enacted by Congress on March 15, 2022, Customers substituted three-month term SOFR plus a tenor spread adjustment of 26.161 basis points for three-month LIBOR as the benchmark reference rate on Series E and F Preferred Stock, plus 5.14% and 4.762%, respectively, beginning with dividends declared on October 25, 2023.

Regulatory Capital (Tables)

Regulatory Capital (Tables)	3 Months Ended
	Mar. 31, 2024
Regulatory Capital [Abstract]
Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios	Generally, to comply with the regulatory definition of adequately capitalized, or well capitalized, respectively, or to comply with the Basel III capital requirements, an institution must at least maintain the common equity Tier 1, Tier 1 and total risk-based capital ratios and the Tier 1 leverage ratio in excess of the related minimum ratios as set forth in the following table: Minimum Capital Levels to be Classified as: Actual Adequately Capitalized Well Capitalized Basel III Compliant (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio Amount Ratio As of March 31, 2024: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,695,246 12.622 % $ 604,410 4.500 % N/A N/A $ 940,193 7.000 % Customers Bank $ 1,898,686 14.155 % $ 603,597 4.500 % $ 871,863 6.500 % $ 938,929 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,833,039 13.648 % $ 805,880 6.000 % N/A N/A $ 1,141,663 8.500 % Customers Bank $ 1,898,686 14.155 % $ 804,797 6.000 % $ 1,073,062 8.000 % $ 1,140,128 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 2,129,343 15.854 % $ 1,074,506 8.000 % N/A N/A $ 1,410,290 10.500 % Customers Bank $ 2,122,179 15.822 % $ 1,073,062 8.000 % $ 1,341,328 10.000 % $ 1,408,394 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,833,039 8.512 % $ 861,350 4.000 % N/A N/A $ 861,350 4.000 % Customers Bank $ 1,898,686 8.824 % $ 860,686 4.000 % $ 1,075,857 5.000 % $ 860,686 4.000 % As of December 31, 2023: Common equity Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,661,149 12.230 % $ 611,200 4.500 % N/A N/A $ 950,755 7.000 % Customers Bank $ 1,868,360 13.773 % $ 610,453 4.500 % $ 881,765 6.500 % $ 949,594 7.000 % Tier 1 capital (to risk-weighted assets) Customers Bancorp, Inc. $ 1,798,942 13.245 % $ 814,933 6.000 % N/A N/A $ 1,154,489 8.500 % Customers Bank $ 1,868,360 13.773 % $ 813,937 6.000 % $ 1,085,250 8.000 % $ 1,153,078 8.500 % Total capital (to risk-weighted assets) Customers Bancorp, Inc. $ 2,076,550 15.289 % $ 1,086,578 8.000 % N/A N/A $ 1,426,133 10.500 % Customers Bank $ 2,073,202 15.283 % $ 1,085,250 8.000 % $ 1,356,562 10.000 % $ 1,424,390 10.500 % Tier 1 capital (to average assets) Customers Bancorp, Inc. $ 1,798,942 8.375 % $ 859,189 4.000 % N/A N/A $ 859,189 4.000 % Customers Bank $ 1,868,360 8.708 % $ 858,225 4.000 % $ 1,072,782 5.000 % $ 858,225 4.000 %

Disclosures About Fair Value _2

Disclosures About Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The estimated fair values of Customers’ financial instruments at March 31, 2024 and December 31, 2023 were as follows: Fair Value Measurements at March 31, 2024 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 3,701,120 $ 3,701,120 $ 3,701,120 $ — $ — Debt securities, available for sale 2,571,139 2,571,139 — 2,542,876 28,263 Debt securities, held to maturity 1,032,037 972,628 — 465,025 507,603 Loans held for sale 357,640 357,640 — 870 356,770 Total loans and leases receivable, net of allowance for credit losses on loans and leases 12,765,935 12,551,635 — 962,610 11,589,025 FHLB, Federal Reserve Bank, and other restricted stock 100,067 100,067 — 100,067 — Derivatives 21,437 21,437 — 21,360 77 Liabilities: Deposits $ 17,961,383 $ 17,958,161 $ 15,778,872 $ 2,179,289 $ — FHLB advances 1,195,088 1,180,285 — 1,180,285 — Other borrowings 123,905 105,761 — 105,761 — Subordinated debt 182,300 163,417 — 163,417 — Derivatives 31,958 31,958 — 31,958 — Fair Value Measurements at December 31, 2023 (amounts in thousands) Carrying Amount Estimated Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Cash and cash equivalents $ 3,846,346 $ 3,846,346 $ 3,846,346 $ — $ — Debt securities, available for sale 2,376,860 2,376,860 — 2,341,911 34,949 Debt securities, held to maturity 1,103,170 1,046,439 — 472,311 574,128 Loans held for sale 340,317 340,317 — 1,215 339,102 Total loans and leases receivable, net of allowance for credit losses on loans and leases 12,726,456 12,513,386 — 897,912 11,615,474 FHLB, Federal Reserve Bank, and other restricted stock 109,548 109,548 — 109,548 — Derivatives 17,931 17,931 — 17,906 25 Liabilities: Deposits $ 17,920,236 $ 17,922,005 $ 14,632,357 $ 3,289,648 $ — FHLB advances 1,203,207 1,188,517 — 1,188,517 — Other borrowings 123,840 103,674 — 103,674 — Subordinated debt 182,230 164,233 — 164,233 — Derivatives 27,110 27,110 — 27,110 —
Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis	For financial assets and liabilities measured at fair value on a recurring and nonrecurring basis, the fair value measurements by level within the fair value hierarchy used at March 31, 2024 and December 31, 2023 were as follows: March 31, 2024 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 29,971 $ 28,263 $ 58,234 Agency-guaranteed residential mortgage-backed securities — 86,412 — 86,412 Agency-guaranteed residential collateralized mortgage obligations — 124,958 — 124,958 Agency-guaranteed commercial collateralized mortgage obligations — 33,774 — 33,774 Collateralized loan obligations — 584,495 — 584,495 Commercial mortgage-backed securities — 112,626 — 112,626 Corporate notes — 610,470 — 610,470 Private label collateralized mortgage obligations — 960,170 — 960,170 Derivatives — 21,360 77 21,437 Loans held for sale – fair value option — 870 219,015 219,885 Loans receivable, mortgage finance – fair value option — 962,610 — 962,610 Total assets – recurring fair value measurements $ — $ 3,527,716 $ 247,355 $ 3,775,071 Liabilities Derivatives $ — $ 31,958 $ — $ 31,958 Measured at Fair Value on a Nonrecurring Basis: Assets Collateral-dependent loans $ — $ — $ 7,747 $ 7,747 Total assets – nonrecurring fair value measurements $ — $ — $ 7,747 $ 7,747 December 31, 2023 Fair Value Measurements at the End of the Reporting Period Using (amounts in thousands) Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Total Measured at Fair Value on a Recurring Basis: Assets Available for sale debt securities: Asset-backed securities $ — $ 57,680 $ 34,949 $ 92,629 Agency-guaranteed residential collateralized mortgage obligations — 116,908 — 116,908 Collateralized loan obligations — 489,092 — 489,092 Commercial mortgage-backed securities — 121,636 — 121,636 Corporate notes — 583,034 — 583,034 Private label collateralized mortgage obligations — 973,561 — 973,561 Derivatives — 17,906 25 17,931 Loans held for sale – fair value option — 1,215 188,062 189,277 Loans receivable, mortgage finance – fair value option — 897,912 — 897,912 Total assets – recurring fair value measurements $ — $ 3,258,944 $ 223,036 $ 3,481,980 Liabilities Derivatives $ — $ 27,110 $ — $ 27,110 Measured at Fair Value on a Nonrecurring Basis: Assets Collateral-dependent loans $ — $ — $ 2,373 $ 2,373 Total assets – nonrecurring fair value measurements $ — $ — $ 2,373 $ 2,373
Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis	The changes in asset-backed securities (Level 3 assets) measured at fair value on a recurring basis for the three months ended March 31, 2024 and 2023 are summarized in the table below. Asset-backed securities (amounts in thousands) Three Months Ended March 31, 2024 2023 Balance at January 1 $ 34,949 $ 73,266 Principal payments and premium amortization (7,114) (11,216) Increase in allowance for credit losses — (273) Decrease in allowance for credit losses 33 61 Change in fair value recognized in OCI 395 1,538 Balance at March 31 $ 28,263 $ 63,376 The changes in other installment loans (Level 3 assets) measured at fair value on a recurring basis, based on an election made to account for the loans at fair value for the three months ended March 31, 2024 and 2023 are summarized in the table below. Other Installment Loans (amounts in thousands) Three Months Ended March 31, 2024 2023 Balance at January 1 $ 188,062 $ — Originations 235,431 — Sales (158,215) — Principal payments (46,263) — Change in fair value recognized in earnings — — Balance at March 31 $ 219,015 $ —
Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis	The following tables summarize financial assets and financial liabilities measured at fair value as of March 31, 2024 and December 31, 2023 on a recurring and nonrecurring basis for which Customers utilized Level 3 inputs to measure fair value. The unobservable Level 3 inputs noted below contain a level of uncertainty that may differ from what is realized in an immediate settlement of the assets. Therefore, Customers may realize a value higher or lower than the current estimated fair value of the assets. Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Technique Unobservable Input Range March 31, 2024 Asset-backed securities $ 28,263 Discounted cash flow Discount rate Annualized loss rate Constant prepayment rate 10% - 13% (12%) 3% - 15% (6%) 10% - 30% (26%) Quantitative Information about Level 3 Fair Value Measurements (dollars in thousands) Fair Value Valuation Technique Unobservable Input Range December 31, 2023 Asset-backed securities $ 34,949 Discounted cash flow Discount rate Annualized loss rate Constant prepayment rate 12% - 14% (13%) 3% - 13% (5%) 11% - 30% (26%)

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	As of March 31, 2024 and December 31, 2023, the following amounts were recorded on the consolidated balance sheet related to cumulative basis adjustments for fair value hedges. Amortized Cost Cumulative Amount of Fair Value Hedging Adjustment to Hedged Items (amounts in thousands) March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 AFS debt securities $ 22,500 $ 22,500 $ 764 $ 941 Deposits 300,000 300,000 1,079 1,432 FHLB advances 700,000 700,000 (4,912) 3,206
Fair Value of Derivative Financial Instruments	The following tables present the fair value of Customers’ derivative financial instruments as well as their presentation on the consolidated balance sheets as of March 31, 2024 and December 31, 2023. March 31, 2024 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives not designated as hedging instruments: Interest rate swaps and caps (1) Other assets $ 21,359 Other liabilities $ 31,956 December 31, 2023 Derivative Assets Derivative Liabilities (amounts in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives not designated as hedging instruments: Interest rate swaps and caps (1) Other assets $ 17,903 Other liabilities $ 27,097 (1) Customers’ centrally cleared derivatives are legally settled through variation margin payments and these payments are reflected as a reduction of the related derivative asset or liability, including accrued interest, on the consolidated balance sheet.
Effect of Derivative Financial Instruments on Net Income and Comprehensive Income	The following table presents amounts included in the consolidated statements of income related to derivatives designated as fair value hedges and derivatives not designated as hedges for the three months ended March 31, 2024 and 2023. Amount of Income (Loss) Recognized in Earnings Three Months Ended March 31, (amounts in thousands) Income Statement Location 2024 2023 Derivatives designated as fair value hedges: Recognized on interest rate swaps Net interest income $ 8,173 $ (301) Recognized on hedged AFS debt securities Net interest income (177) 301 Recognized on hedged FHLB advances Net interest income (7,996) — Total $ — $ — Derivatives not designated as hedging instruments: Interest rate swaps and caps Other non-interest income $ 672 $ (24)
Summary of Offsetting of Financial Assets and Derivative Assets	The following tables present derivative instruments that are subject to enforceable master netting arrangements. Customers’ interest rate swaps and interest rate caps with institutional counterparties are subject to master netting arrangements and are included in the tables below. Interest rate swaps and interest rate caps with commercial banking customers are not subject to master netting arrangements and are excluded from the tables below. Customers has not made a policy election to offset its derivative positions. Gross Amounts Recognized on the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount (amounts in thousands) Financial Instruments Cash Collateral Received/Posted March 31, 2024 Interest rate derivative assets with institutional counterparties $ 20,701 $ (929) $ (19,772) $ — Interest rate derivative liabilities with institutional counterparties $ 929 $ (929) $ — $ — Gross Amounts Recognized on the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount (amounts in thousands) Financial Instruments Cash Collateral Received/Posted December 31, 2023 Interest rate derivative assets with institutional counterparties $ 17,439 $ (500) $ (16,939) $ — Interest rate derivative liabilities with institutional counterparties $ 500 $ (500) $ — $ —
Summary of Offsetting of Financial Liabilities and Derivative Liabilities	The following tables present derivative instruments that are subject to enforceable master netting arrangements. Customers’ interest rate swaps and interest rate caps with institutional counterparties are subject to master netting arrangements and are included in the tables below. Interest rate swaps and interest rate caps with commercial banking customers are not subject to master netting arrangements and are excluded from the tables below. Customers has not made a policy election to offset its derivative positions. Gross Amounts Recognized on the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount (amounts in thousands) Financial Instruments Cash Collateral Received/Posted March 31, 2024 Interest rate derivative assets with institutional counterparties $ 20,701 $ (929) $ (19,772) $ — Interest rate derivative liabilities with institutional counterparties $ 929 $ (929) $ — $ — Gross Amounts Recognized on the Consolidated Balance Sheet Gross Amounts Not Offset in the Consolidated Balance Sheet Net Amount (amounts in thousands) Financial Instruments Cash Collateral Received/Posted December 31, 2023 Interest rate derivative assets with institutional counterparties $ 17,439 $ (500) $ (16,939) $ — Interest rate derivative liabilities with institutional counterparties $ 500 $ (500) $ — $ —

Description of the Business - A

Description of the Business - Additional Information (Detail)	Mar. 31, 2024 branch
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of branches (branch)	7

Earnings (Loss) Per Share - Com

Earnings (Loss) Per Share - Components of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net income available to common shareholders, basic	$ 45,926	$ 50,265
Net income available to common shareholders, diluted	$ 45,926	$ 50,265
Weighted-average number of common shares outstanding – basic (shares)	31,473,424	31,819,203
Share-based compensation plans (shares)	1,381,110	525,814
Weighted-average number of common shares – diluted (shares)	32,854,534	32,345,017
Basic earnings per common share (usd per share)	$ 1.46	$ 1.58
Diluted earnings per common share (usd per share)	$ 1.40	$ 1.55

Earnings (Loss) Per Share - Ant

Earnings (Loss) Per Share - Anti-Dilutive Securities Excluded from Computation of Earnings (Loss) Per Share (Detail) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based compensation awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities (shares)	1,680	850,725

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 1,638,394	$ 1,402,961
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity	1,206	872
Income tax effect	(306)	(221)
Other comprehensive income (loss), net of income tax effect	4,264	6,820
Ending balance	1,691,617	1,421,020
Unrealized Gains (Losses) on Available for Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(136,569)	(163,096)
Unrealized gains (losses) arising during period, before tax	4,480	8,270
Income tax effect	(1,138)	(2,101)
Other comprehensive income (loss) before reclassifications	3,342	6,169
Reclassification adjustments for (gains) losses included in net income, before tax	30	0
Income tax effect	(8)	0
Amounts reclassified from accumulated other comprehensive income (loss) to net income	22	0
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity	1,206	872
Income tax effect	(306)	(221)
Amortization of unrealized loss on securities transferred from available for sale to held to maturity	900	651
Other comprehensive income (loss), net of income tax effect	4,264	6,820
Ending balance	$ (132,305)	$ (156,276)

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 2,715,374	$ 2,524,663
Allowance for Credit Losses	(5,069)	(3,952)	$ (2,173)	$ (578)
Gross Unrealized Gains	1,055	1,296
Gross Unrealized Losses	(140,221)	(145,147)
Fair Value	2,571,139	2,376,860
Equity securities	33,729	28,780
Total investment securities, at fair value	2,604,868	2,405,640
Available-for-sale debt securities, accrued interest	19,500	14,700
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	62,274	97,359
Allowance for Credit Losses	(450)	(483)	(790)	(578)
Gross Unrealized Gains	0	15
Gross Unrealized Losses	(3,590)	(4,262)
Fair Value	58,234	92,629
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	86,227
Allowance for Credit Losses	0
Gross Unrealized Gains	299
Gross Unrealized Losses	(114)
Fair Value	86,412
Agency-guaranteed residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	138,573	129,589
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(13,615)	(12,681)
Fair Value	124,958	116,908
Agency-guaranteed commercial collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	34,573
Allowance for Credit Losses	0
Gross Unrealized Gains	73
Gross Unrealized Losses	(872)
Fair Value	33,774
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	593,236	500,109
Allowance for Credit Losses	0	0
Gross Unrealized Gains	55	1
Gross Unrealized Losses	(8,796)	(11,018)
Fair Value	584,495	489,092
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	114,445	125,885
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,819)	(4,249)
Fair Value	112,626	121,636
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	668,459	636,880
Allowance for Credit Losses	(4,619)	(3,469)	$ (1,383)	$ 0
Gross Unrealized Gains	0	79
Gross Unrealized Losses	(53,370)	(50,456)
Fair Value	610,470	583,034
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,017,587	1,034,841
Allowance for Credit Losses	0	0
Gross Unrealized Gains	628	1,201
Gross Unrealized Losses	(58,045)	(62,481)
Fair Value	$ 960,170	$ 973,561

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024 USD ($) assetBackedSecurity security corporateNote	Mar. 31, 2023 USD ($) assetBackedSecurity corporateNote	Dec. 31, 2023 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Proceeds from sales of investment securities available for sale	$ 21,970,000	$ 0
Number of available-for-sale investment securities, unrealized loss position, less than twelve month category | security	38
Number of available-for-sale investment securities, unrealized loss position, twelve month or more category | security	102
Number of asset-backed securities with deterioration in future estimated cash flows | assetBackedSecurity	1	4
Number of corporate notes with deterioration in future estimated cash flows | corporateNote	19	6
Number of available-for-sale investment securities, unrealized loss position | security	140		119
Debt securities, available for sale	$ 2,571,139,000		$ 2,376,860,000
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest	0		0
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available for sale	58,234,000		92,629,000
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest	0		0
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Debt securities, available for sale	1,300,000,000		1,200,000,000
Debt securities	$ 391,400,000		$ 398,400,000

Investment Securities - Gain (L

Investment Securities - Gain (Loss) on Sale of AFS Debt Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 0	$ 0
Gross realized losses	(30)	0
Net realized gains (losses) on sale of available for sale debt securities	$ (30)	$ 0

Investment Securities - Summa_2

Investment Securities - Summary of Available-for-Sale Debt Securities by Stated Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Due in one year or less, amortized cost	$ 31,500
Due after one year through five years, amortized cost	569,353
Due after five years through ten years, amortized cost	67,606
Amortized Cost	2,715,374	$ 2,524,663
Due in one year or less, fair value	26,852
Due after one year through five years, fair value	525,291
Due after five years through ten years, fair value	58,327
Fair Value	2,571,139	2,376,860
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	62,274
Amortized Cost	62,274	97,359
Debt securities, available-for-sale, without single maturity date, fair value	58,234
Fair Value	58,234	92,629
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	86,227
Amortized Cost	86,227
Debt securities, available-for-sale, without single maturity date, fair value	86,412
Fair Value	86,412
Agency-guaranteed residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	138,573
Amortized Cost	138,573	129,589
Debt securities, available-for-sale, without single maturity date, fair value	124,958
Fair Value	124,958	116,908
Agency-guaranteed commercial collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	34,573
Amortized Cost	34,573
Debt securities, available-for-sale, without single maturity date, fair value	33,774
Fair Value	33,774
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	593,236
Amortized Cost	593,236	500,109
Debt securities, available-for-sale, without single maturity date, fair value	584,495
Fair Value	584,495	489,092
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	114,445
Amortized Cost	114,445	125,885
Debt securities, available-for-sale, without single maturity date, fair value	112,626
Fair Value	112,626	121,636
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, without single maturity date, amortized cost	1,017,587
Amortized Cost	1,017,587	1,034,841
Debt securities, available-for-sale, without single maturity date, fair value	960,170
Fair Value	$ 960,170	$ 973,561

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	$ 491,430	$ 356,234
Less than 12 Months, Unrealized Losses	(10,535)	(12,782)
12 Months or More, Fair Value	1,690,547	1,778,899
12 Months or More, Unrealized Losses	(112,720)	(116,764)
Total, Fair Value	2,181,977	2,135,133
Total, Unrealized Losses	(123,255)	(129,546)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	52,676	64,029
12 Months or More, Unrealized Losses	(3,261)	(4,027)
Total, Fair Value	52,676	64,029
Total, Unrealized Losses	(3,261)	(4,027)
Agency-guaranteed residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	47,014
Less than 12 Months, Unrealized Losses	(114)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Total, Fair Value	47,014
Total, Unrealized Losses	(114)
Agency-guaranteed residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	12,283	0
Less than 12 Months, Unrealized Losses	(105)	0
12 Months or More, Fair Value	112,675	116,908
12 Months or More, Unrealized Losses	(13,510)	(12,681)
Total, Fair Value	124,958	116,908
Total, Unrealized Losses	(13,615)	(12,681)
Agency-guaranteed commercial collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	26,582
Less than 12 Months, Unrealized Losses	(872)
12 Months or More, Fair Value	0
12 Months or More, Unrealized Losses	0
Total, Fair Value	26,582
Total, Unrealized Losses	(872)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	114,173	29,241
Less than 12 Months, Unrealized Losses	(779)	(392)
12 Months or More, Fair Value	429,799	438,551
12 Months or More, Unrealized Losses	(8,017)	(10,626)
Total, Fair Value	543,972	467,792
Total, Unrealized Losses	(8,796)	(11,018)
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	0	0
Less than 12 Months, Unrealized Losses	0	0
12 Months or More, Fair Value	112,626	121,636
12 Months or More, Unrealized Losses	(1,819)	(4,249)
Total, Fair Value	112,626	121,636
Total, Unrealized Losses	(1,819)	(4,249)
Corporate notes
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	30,829	23,243
Less than 12 Months, Unrealized Losses	(532)	(1,147)
12 Months or More, Fair Value	410,323	424,768
12 Months or More, Unrealized Losses	(36,201)	(33,764)
Total, Fair Value	441,152	448,011
Total, Unrealized Losses	(36,733)	(34,911)
Private label collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Fair Value	260,549	303,750
Less than 12 Months, Unrealized Losses	(8,133)	(11,243)
12 Months or More, Fair Value	572,448	613,007
12 Months or More, Unrealized Losses	(49,912)	(51,417)
Total, Fair Value	832,997	916,757
Total, Unrealized Losses	$ (58,045)	$ (62,660)

Investment Securities - Credit

Investment Securities - Credit Valuation Allowance for Available-for-Sale Debt Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	$ 3,952	$ 578
Credit losses on securities for which credit losses were not previously recorded	502	1,383
Credit losses on previously impaired securities	648	273
Decrease in allowance for credit losses on previously impaired securities	(33)	(61)
Debt securities, allowance for credit loss, ending balance	5,069	2,173
Asset-backed securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	483	578
Credit losses on securities for which credit losses were not previously recorded	0	0
Credit losses on previously impaired securities	0	273
Decrease in allowance for credit losses on previously impaired securities	(33)	(61)
Debt securities, allowance for credit loss, ending balance	450	790
Corporate notes
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	3,469	0
Credit losses on securities for which credit losses were not previously recorded	502	1,383
Credit losses on previously impaired securities	648	0
Decrease in allowance for credit losses on previously impaired securities	0	0
Debt securities, allowance for credit loss, ending balance	$ 4,619	$ 1,383

Investment Securities - Summa_3

Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Detail) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	$ 1,032,037,000	$ 1,103,170,000
Allowance for Credit Losses	0	0
Net Carrying Value	1,032,037,000	1,103,170,000
Gross Unrealized Gains	345,000	202,000
Gross Unrealized Losses	(59,754,000)	(56,933,000)
Fair Value	972,628,000	1,046,439,000
Debt securities, held to maturity, accrued interest	2,600,000	2,700,000
Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	509,690,000	575,990,000
Allowance for Credit Losses	0	0
Net Carrying Value	509,690,000	575,990,000
Gross Unrealized Gains	345,000	202,000
Gross Unrealized Losses	(2,432,000)	(2,064,000)
Fair Value	507,603,000	574,128,000
Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	7,001,000	7,039,000
Allowance for Credit Losses	0	0
Net Carrying Value	7,001,000	7,039,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,087,000)	(649,000)
Fair Value	5,914,000	6,390,000
Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	1,830,000	1,850,000
Allowance for Credit Losses	0	0
Net Carrying Value	1,830,000	1,850,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(151,000)	(134,000)
Fair Value	1,679,000	1,716,000
Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	182,856,000	186,636,000
Allowance for Credit Losses	0	0
Net Carrying Value	182,856,000	186,636,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(20,723,000)	(19,049,000)
Fair Value	162,133,000	167,587,000
Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	146,001,000	146,765,000
Allowance for Credit Losses	0	0
Net Carrying Value	146,001,000	146,765,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(21,535,000)	(23,178,000)
Fair Value	124,466,000	123,587,000
Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	184,659,000	184,890,000
Allowance for Credit Losses	0	0
Net Carrying Value	184,659,000	184,890,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(13,826,000)	(11,859,000)
Fair Value	$ 170,833,000	$ 173,031,000

Investment Securities - Summa_4

Investment Securities - Summary of Held-to-Maturity Debt Securities by Stated Maturity (Detail) $ in Thousands	Mar. 31, 2024 USD ($)
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	$ 1,032,037
Fair Value	972,628
Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	509,690
Fair Value	507,603
Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	7,001
Fair Value	5,914
Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	1,830
Fair Value	1,679
Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	182,856
Fair Value	162,133
Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	146,001
Fair Value	124,466
Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	184,659
Fair Value	$ 170,833

Investment Securities - Debt Se

Investment Securities - Debt Securities, Held-to-Maturity, Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	$ 1,032,037	$ 1,103,170
Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	509,690	575,990
Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	7,001	7,039
Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	1,830	1,850
Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	182,856	186,636
Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	146,001	146,765
Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	184,659	$ 184,890
AAA
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	66,371
AAA | Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	66,371
AA
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	44,429
AA | Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	44,429
Not Rated
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	921,237
Not Rated | Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	509,690
Not Rated | Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	7,001
Not Rated | Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	1,830
Not Rated | Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	182,856
Not Rated | Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	146,001
Not Rated | Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	$ 73,859

Loans Held for Sale - Compositi

Loans Held for Sale - Composition of Loans Held for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Receivable, Held-for-Sale [Abstract]
Residential mortgage loans, at fair value	$ 870	$ 1,215
Personal installment loans, at lower of cost or fair value	137,755	151,040
Other installment loans, at fair value	219,015	188,062
Loans held for sale (includes $219,885 and $189,277, respectively, at fair value)	$ 357,640	$ 340,317

Loans Held for Sale - Narrative

Loans Held for Sale - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Receivable, Held-for-Sale [Abstract]
Loans held for sale (including nonperforming loans)	$ 0.6	$ 0.5

Loans and Leases Receivable a_3

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loans and Leases Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	$ 11,884,664	$ 11,889,120
Loans and leases receivable	11,936,621	11,963,855
Loans receivable, mortgage finance, at fair value	962,610	897,912
Allowance for credit losses on loans and leases	(133,296)	(135,311)	$ (130,281)	$ (130,924)
Total loans and leases receivable, net of allowance for credit losses on loans and leases	12,765,935	12,726,456
Loans and leases receivable	11,936,621	11,963,855
Loans receivable, PPP	52,000	74,700
Deferred (fees) costs and unamortized (discounts) premiums, net	(20,400)	(22,700)
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,123,675	2,138,622
Allowance for credit losses on loans and leases	(18,307)	(16,343)	(15,084)	(14,541)
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	185,601	166,393
Allowance for credit losses on loans and leases	(1,866)	(1,482)	(2,336)	(1,913)
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	482,537	484,435
Allowance for credit losses on loans and leases	(6,707)	(6,586)	(6,853)	(6,094)
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	37,382	38,670
Allowance for credit losses on loans and leases	(4,160)	(4,239)	$ (4,339)	$ (4,430)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	10,624,096	10,565,824
Commercial | Specialized lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	5,104,405	5,006,693
Commercial | Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,222,053	1,279,147
Commercial | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,123,675	2,138,622
Commercial | Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	806,278	797,319
Commercial | Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,182,084	1,177,650
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	185,601	166,393
Commercial | Direct finance equipment leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	212,100	205,700
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,312,525	1,398,031
Consumer | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	482,537	484,435
Consumer | Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	37,382	38,670
Consumer | Personal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	492,892	555,533
Consumer | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	$ 299,714	$ 319,393

Loans and Leases Receivable a_4

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Troubled Debt Restructuring [Line Items]
Accrued interest	$ 92,200	$ 95,000
Loans receivable, excluding accrued interest	$ 12,765,935	12,726,456
Loans held for sale, average life from purchase to sale	30 days
Allowance for credit loss, excluding accrued interest	$ 133,296	135,311	$ 130,281	$ 130,924
Allowance for credit loss, period decrease	2,000
Number of commitments to lend additional funds (commitment)	0
Loans receivable, PPP	52,000	74,700
Total consumer loans receivable	11,884,664	11,889,120
Asset Pledged as Collateral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total consumer loans receivable	7,600,000	7,000,000
Commercial Real Estate | Other commercial and industrial | Collateral Dependent Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans receivable, excluding accrued interest	$ 23,800	$ 15,800

Loans and Leases Receivable a_5

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Performance Status (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	$ 11,884,664	$ 11,889,120
Loans still accruing interest because collection is considered probable	500	500
Purchased-credit-impaired loans	154,000	157,200
Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	52,000	74,700
Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	103,840	93,956
30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	66,750	55,532
30-59 Days past due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,700	700
60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	6,327	14,600
90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	30,763	23,824
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	11,780,824	11,795,164
60 Days or More Past Due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	32,300	48,500
Commercial and industrial, including specialized lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	6,274,501	6,211,105
Commercial and industrial, including specialized lending | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	8,714	5,991
Commercial and industrial, including specialized lending | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	5,910	1,516
Commercial and industrial, including specialized lending | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	180	322
Commercial and industrial, including specialized lending | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,624	4,153
Commercial and industrial, including specialized lending | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	6,265,787	6,205,114
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,123,675	2,138,622
Multifamily | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	15,492	16,003
Multifamily | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	10,331	16,003
Multifamily | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Multifamily | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	5,161	0
Multifamily | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,108,183	2,122,619
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	806,278	797,319
Commercial real estate owner occupied | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	12,018	10,090
Commercial real estate owner occupied | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	3,135	449
Commercial real estate owner occupied | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	3,814
Commercial real estate owner occupied | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	8,883	5,827
Commercial real estate owner occupied | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	794,260	787,229
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,182,084	1,177,650
Commercial real estate non-owner occupied | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	27,694	16,653
Commercial real estate non-owner occupied | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	27,632	16,653
Commercial real estate non-owner occupied | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Commercial real estate non-owner occupied | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	62	0
Commercial real estate non-owner occupied | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,154,390	1,160,997
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	185,601	166,393
Construction | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	185,601	166,393
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	482,537	484,435
Residential real estate | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	16,375	16,523
Residential real estate | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	11,289	10,504
Residential real estate | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	786	2,255
Residential real estate | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	4,300	3,764
Residential real estate | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	466,162	467,912
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	37,382	38,670
Manufactured housing | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	3,805	4,364
Manufactured housing | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	629	1,152
Manufactured housing | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	401	343
Manufactured housing | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,775	2,869
Manufactured housing | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	33,577	34,306
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	792,606	874,926
Installment | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	19,742	24,332
Installment | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	7,824	9,255
Installment | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	4,960	7,866
Installment | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	6,958	7,211
Installment | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	$ 772,864	$ 850,594

Loans and Leases Receivable a_6

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Summary of Amortized Cost of Loans and Leases on Nonaccrual Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	$ 25,129	$ 15,919
Nonaccrual loans with related allowance	9,937	10,730
Total nonaccrual loans	35,066	26,649
Commercial and industrial, including specialized lending
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	3,322	3,365
Nonaccrual loans with related allowance	286	1,071
Total nonaccrual loans	3,608	4,436
Multifamily
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	5,161	0
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	5,161	0
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	8,920	5,869
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	8,920	5,869
Commercial real estate non-owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	62	0
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	62	0
Residential real estate
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	7,664	6,685
Nonaccrual loans with related allowance	425	117
Total nonaccrual loans	8,089	6,802
Manufactured housing
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,268	2,331
Total nonaccrual loans	2,268	2,331
Installment
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	6,958	7,211
Total nonaccrual loans	$ 6,958	$ 7,211

Loans and Leases Receivable a_7

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 135,311	$ 130,924	$ 130,924
Charge-offs	(22,827)	(21,114)	(95,066)
Recoveries	4,859	2,463
Provision (benefit) for credit losses on loans and leases	15,953	18,008
Ending balance	133,296	130,281	135,311
Commercial and industrial, including specialized lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	23,503	17,582	17,582
Charge-offs	(5,396)	(160)
Recoveries	1,724	231
Provision (benefit) for credit losses on loans and leases	3,172	2,397
Ending balance	23,003	20,050	23,503
Multifamily
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	16,343	14,541	14,541
Charge-offs	(473)	0
Recoveries	0	0
Provision (benefit) for credit losses on loans and leases	2,437	543
Ending balance	18,307	15,084	16,343
Commercial real estate owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	9,882	6,454	6,454
Charge-offs	(22)	0
Recoveries	0	0
Provision (benefit) for credit losses on loans and leases	341	2,018
Ending balance	10,201	8,472	9,882
Commercial real estate non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	16,859	11,219	11,219
Charge-offs	0	(4,239)
Recoveries	0	5
Provision (benefit) for credit losses on loans and leases	1,461	4,047
Ending balance	18,320	11,032	16,859
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,482	1,913	1,913
Charge-offs	0	0
Recoveries	0	116
Provision (benefit) for credit losses on loans and leases	384	307
Ending balance	1,866	2,336	1,482
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	6,586	6,094	6,094
Charge-offs	(19)	0
Recoveries	1	2
Provision (benefit) for credit losses on loans and leases	139	757
Ending balance	6,707	6,853	6,586
Manufactured housing
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4,239	4,430	4,430
Charge-offs	0	0
Recoveries	0	0
Provision (benefit) for credit losses on loans and leases	(79)	(91)
Ending balance	4,160	4,339	4,239
Installment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	56,417	68,691	68,691
Charge-offs	(16,917)	(16,715)
Recoveries	3,134	2,109
Provision (benefit) for credit losses on loans and leases	8,098	8,030
Ending balance	$ 50,732	$ 62,115	$ 56,417

Loans and Leases Receivable a_8

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Loan Modifications for Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 16,706	$ 5,489
Loan modifications	43,108	5,489
30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	2,980	202
60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	718	216
90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	577	190
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	38,833	4,881
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	3,747	5,181
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	12,923	131
Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	36	114
Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	0	63
Commercial and industrial, including specialized lending
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 1,980	$ 172
Percentage of Total by Financing Class	0.03%	0%
Interest Rate Reduction (%)	0	0
Debt Forgiven	$ 0	$ 0
Loan modifications	17,328	172
Commercial and industrial, including specialized lending | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	1,980	0
Commercial and industrial, including specialized lending | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	172
Commercial and industrial, including specialized lending | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0
Commercial and industrial, including specialized lending | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	15,348	0
Commercial and industrial, including specialized lending | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	$ 172
Term Extension and Payment Deferral (in months)	0 months	4 months
Commercial and industrial, including specialized lending | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 1,980	$ 0
Term Extension and Payment Deferral (in months)	3 months	0 months
Commercial and industrial, including specialized lending | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	$ 0
Commercial and industrial, including specialized lending | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	0	$ 0
Multifamily
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 10,688
Percentage of Total by Financing Class	0.50%
Interest Rate Reduction (%)	0	0
Debt Forgiven	$ 0	$ 0
Loan modifications	10,688
Multifamily | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0
Multifamily | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0
Multifamily | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0
Multifamily | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	10,688
Multifamily | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Term Extension and Payment Deferral (in months)	0 months	0 months
Multifamily | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 10,688
Term Extension and Payment Deferral (in months)	12 months	0 months
Multifamily | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Multifamily | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	0
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 57
Percentage of Total by Financing Class	0.01%
Interest Rate Reduction (%)	0	0
Debt Forgiven	$ 0	$ 0
Loan modifications	103
Residential real estate | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	57
Residential real estate | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0
Residential real estate | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0
Residential real estate | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	46
Residential real estate | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Term Extension and Payment Deferral (in months)	0 months	0 months
Residential real estate | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 57
Term Extension and Payment Deferral (in months)	5 months	0 months
Residential real estate | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Residential real estate | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0
Commercial real estate owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 169
Percentage of Total by Financing Class		0.02%
Interest Rate Reduction (%)	0	0
Debt Forgiven	$ 0	$ 0
Loan modifications		169
Commercial real estate owner occupied | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0
Commercial real estate owner occupied | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0
Commercial real estate owner occupied | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		169
Commercial real estate owner occupied | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications		0
Commercial real estate owner occupied | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 169
Term Extension and Payment Deferral (in months)	0 months	4 months
Commercial real estate owner occupied | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 0
Term Extension and Payment Deferral (in months)	0 months	0 months
Commercial real estate owner occupied | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 0
Commercial real estate owner occupied | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		0
Manufactured housing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 70
Percentage of Total by Financing Class		0.16%
Interest Rate Reduction (%)	0	0.008
Debt Forgiven	$ 0	$ 0
Loan modifications	743	70
Manufactured housing | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	0	0
Manufactured housing | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	92	0
Manufactured housing | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	31	0
Manufactured housing | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	$ 620	70
Manufactured housing | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 7
Term Extension and Payment Deferral (in months)	0 months	55 months
Manufactured housing | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 0
Term Extension and Payment Deferral (in months)	0 months	0 months
Manufactured housing | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		$ 0
Manufactured housing | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans		63
Personal installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 3,981	$ 5,078
Percentage of Total by Financing Class	0.50%	0.60%
Interest Rate Reduction (%)	0	0
Debt Forgiven	$ 100	$ 66
Loan modifications	14,246	5,078
Personal installment | 30-59 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	943	202
Personal installment | 60-89 Days past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	626	44
Personal installment | 90 Days or more past due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	546	21
Personal installment | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loan modifications	12,131	4,811
Personal installment | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 3,747	$ 4,833
Term Extension and Payment Deferral (in months)	6 months	5 months
Personal installment | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 198	$ 131
Term Extension and Payment Deferral (in months)	6 months	6 months
Personal installment | Debt Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 36	$ 114
Personal installment | Interest Rate Reduction and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost of loans	$ 0	$ 0

Loans and Leases Receivable a_9

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Credit Ratings (Detail) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jun. 15, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		$ 550,030		$ 1,570,977
Fiscal year before current year		1,362,831		4,397,333
Two years before current year		4,424,761		1,521,513
Three years before current year		1,445,361		634,860
Four years before current year		602,817		347,230
Prior		1,426,822		1,173,759
Revolving loans amortized cost basis		1,715,051		1,843,180
Revolving loans converted to term		356,991		400,268
Loans and leases receivable		11,884,664		11,889,120
Current year, charge-offs		1,217		9,211
Fiscal year before current year, charge-offs		1,537		24,986
Two years before current fiscal year, charge-offs		6,564		27,153
Three years before current fiscal year, charge-offs		8,634		15,938
Four years before current fiscal year, charge-offs		1,965		6,821
Prior, charge-offs		2,910		10,957
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		22,827	$ 21,114	95,066
Allowance for credit losses on FDIC PCD loans, excluding charge-offs	$ 8,700
Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		52,000		74,700
Loans and leases receivable, charge-offs		3,400		10,700
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		10,624,096		10,565,824
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		1,312,525		1,398,031
Commercial loans and leases receivable | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		530,545		1,291,772
Fiscal year before current year		1,108,999		3,911,891
Two years before current year		3,980,801		1,228,524
Three years before current year		1,179,449		577,273
Four years before current year		542,127		290,649
Prior		1,262,296		1,056,227
Revolving loans amortized cost basis		1,610,938		1,734,485
Revolving loans converted to term		356,984		400,268
Loans and leases receivable		10,572,139		10,491,089
Current year, charge-offs		145		1,483
Fiscal year before current year, charge-offs		484		381
Two years before current fiscal year, charge-offs		344		3,169
Three years before current fiscal year, charge-offs		3,397		10,348
Four years before current fiscal year, charge-offs		692		24
Prior, charge-offs		829		9,650
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		5,891		25,055
Commercial and industrial, including specialized lending
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		6,274,501		6,211,105
Loans and leases receivable, charge-offs		5,396	160
Commercial and industrial, including specialized lending | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		453,522		1,217,661
Fiscal year before current year		1,036,055		1,952,227
Two years before current year		2,036,833		549,699
Three years before current year		511,091		199,030
Four years before current year		176,336		64,016
Prior		104,030		106,137
Revolving loans amortized cost basis		1,610,938		1,734,485
Revolving loans converted to term		345,696		387,850
Loans and leases receivable		6,274,501		6,211,105
Current year, charge-offs		145		1,483
Fiscal year before current year, charge-offs		484		381
Two years before current fiscal year, charge-offs		344		3,169
Three years before current fiscal year, charge-offs		3,397		10,348
Four years before current fiscal year, charge-offs		692		24
Prior, charge-offs		334		1,510
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		5,396		16,915
Commercial and industrial, including specialized lending | Pass | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		453,522		1,184,923
Fiscal year before current year		1,023,266		1,909,592
Two years before current year		2,018,082		483,039
Three years before current year		471,404		170,384
Four years before current year		142,178		59,213
Prior		60,734		63,480
Revolving loans amortized cost basis		1,594,160		1,722,559
Revolving loans converted to term		343,934		384,947
Loans and leases receivable		6,107,280		5,978,137
Commercial and industrial, including specialized lending | Special mention | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		18,000
Fiscal year before current year		12,090		3,377
Two years before current year		176		5,127
Three years before current year		5,000		1,986
Four years before current year		6,884		0
Prior		3,430		595
Revolving loans amortized cost basis		10,923		7,916
Revolving loans converted to term		1,689		2,903
Loans and leases receivable		40,192		39,904
Commercial and industrial, including specialized lending | Substandard | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		14,738
Fiscal year before current year		699		39,258
Two years before current year		18,575		61,533
Three years before current year		34,687		26,660
Four years before current year		27,274		4,803
Prior		39,866		42,062
Revolving loans amortized cost basis		5,855		4,010
Revolving loans converted to term		73		0
Loans and leases receivable		127,029		193,064
Commercial and industrial, including specialized lending | Doubtful | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		0		0
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		0		0
Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		2,123,675		2,138,622
Loans and leases receivable, charge-offs		473	0
Multifamily | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		845
Fiscal year before current year		850		1,229,198
Two years before current year		1,239,644		371,016
Three years before current year		344,966		127,493
Four years before current year		128,439		49,514
Prior		409,776		360,556
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		2,123,675		2,138,622
Current year, charge-offs		0		0
Fiscal year before current year, charge-offs		0		0
Two years before current fiscal year, charge-offs		0		0
Three years before current fiscal year, charge-offs		0		0
Four years before current fiscal year, charge-offs		0		0
Prior, charge-offs		473		3,574
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		473		3,574
Multifamily | Pass | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		845
Fiscal year before current year		850		1,229,198
Two years before current year		1,239,644		371,016
Three years before current year		344,966		127,493
Four years before current year		128,439		43,046
Prior		284,391		253,806
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		1,998,290		2,025,404
Multifamily | Special mention | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		6,468
Prior		88,656		67,035
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		88,656		73,503
Multifamily | Substandard | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		36,729		39,715
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		36,729		39,715
Multifamily | Doubtful | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		0		0
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		0		0
Commercial real estate owner occupied loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		806,278		797,319
Loans and leases receivable, charge-offs		22	0
Commercial real estate owner occupied loans: | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		66,614		41,011
Fiscal year before current year		37,447		254,878
Two years before current year		226,892		195,721
Three years before current year		194,190		77,821
Four years before current year		66,229		80,420
Prior		203,618		136,150
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		11,288		11,318
Loans and leases receivable		806,278		797,319
Current year, charge-offs		0		0
Fiscal year before current year, charge-offs		0		0
Two years before current fiscal year, charge-offs		0		0
Three years before current fiscal year, charge-offs		0		0
Four years before current fiscal year, charge-offs		0		0
Prior, charge-offs		22		39
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		22		39
Commercial real estate owner occupied loans: | Pass | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		66,614		41,011
Fiscal year before current year		34,503		254,878
Two years before current year		226,892		180,289
Three years before current year		178,805		77,821
Four years before current year		66,229		44,382
Prior		152,046		120,248
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		11,288		11,318
Loans and leases receivable		736,377		729,947
Commercial real estate owner occupied loans: | Special mention | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		15,432
Three years before current year		0		0
Four years before current year		0		35,691
Prior		35,530		47
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		35,530		51,170
Commercial real estate owner occupied loans: | Substandard | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		2,944		0
Two years before current year		0		0
Three years before current year		15,385		0
Four years before current year		0		347
Prior		16,042		15,855
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		34,371		16,202
Commercial real estate owner occupied loans: | Doubtful | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0
Prior		0		0
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		0		0
Commercial real estate non-owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		1,182,084		1,177,650
Loans and leases receivable, charge-offs		0	4,239
Commercial real estate non-owner occupied | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		7,195		12,906
Fiscal year before current year		16,791		336,791
Two years before current year		342,409		109,521
Three years before current year		103,661		172,929
Four years before current year		171,123		96,699
Prior		540,905		448,804
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		1,182,084		1,177,650
Current year, charge-offs		0		0
Fiscal year before current year, charge-offs		0		0
Two years before current fiscal year, charge-offs		0		0
Three years before current fiscal year, charge-offs		0		0
Four years before current fiscal year, charge-offs		0		0
Prior, charge-offs		0		4,527
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		0		4,527
Commercial real estate non-owner occupied | Pass | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		7,195		12,906
Fiscal year before current year		16,791		325,881
Two years before current year		337,029		109,521
Three years before current year		103,661		152,227
Four years before current year		150,553		88,586
Prior		456,456		367,996
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		1,071,685		1,057,117
Commercial real estate non-owner occupied | Special mention | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		5,380		0
Three years before current year		0		20,702
Four years before current year		20,570		0
Prior		415		9,148
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		26,365		29,850
Commercial real estate non-owner occupied | Substandard | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		10,910
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		8,113
Prior		84,034		71,660
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		84,034		90,683
Commercial real estate non-owner occupied | Doubtful | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		0		0
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		0		0
Construction loans:
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		185,601		166,393
Loans and leases receivable, charge-offs		0	0
Construction loans: | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		3,214		19,349
Fiscal year before current year		17,856		138,797
Two years before current year		135,023		2,567
Three years before current year		25,541		0
Four years before current year		0		0
Prior		3,967		4,580
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		1,100
Loans and leases receivable		185,601		166,393
Current year, charge-offs		0		0
Fiscal year before current year, charge-offs		0		0
Two years before current fiscal year, charge-offs		0		0
Three years before current fiscal year, charge-offs		0		0
Four years before current fiscal year, charge-offs		0		0
Prior, charge-offs		0		0
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		0		0
Construction loans: | Pass | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		3,214		17,594
Fiscal year before current year		14,234		138,797
Two years before current year		135,023		2,567
Three years before current year		25,541		0
Four years before current year		0		0
Prior		3,967		4,580
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		1,100
Loans and leases receivable		181,979		164,638
Construction loans: | Special mention | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		1,755
Fiscal year before current year		3,622		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		0		0
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		3,622		1,755
Construction loans: | Substandard | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		0		0
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		0		0
Construction loans: | Doubtful | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		0		0
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		0		0
Consumer loans | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		19,485		279,205
Fiscal year before current year		253,832		485,442
Two years before current year		443,960		292,989
Three years before current year		265,912		57,587
Four years before current year		60,690		56,581
Prior		164,526		117,532
Revolving loans amortized cost basis		104,113		108,695
Revolving loans converted to term		7		0
Loans and leases receivable		1,312,525		1,398,031
Current year, charge-offs		1,072		7,728
Fiscal year before current year, charge-offs		1,053		24,605
Two years before current fiscal year, charge-offs		6,220		23,984
Three years before current fiscal year, charge-offs		5,237		5,590
Four years before current fiscal year, charge-offs		1,273		6,797
Prior, charge-offs		2,081		1,307
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		16,936		70,011
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		482,537		484,435
Loans and leases receivable, charge-offs		19	0
Residential real estate | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		4,437		22,613
Fiscal year before current year		22,540		173,774
Two years before current year		172,157		132,857
Three years before current year		131,620		6,687
Four years before current year		6,565		16,053
Prior		90,120		75,426
Revolving loans amortized cost basis		55,098		57,025
Revolving loans converted to term		0		0
Loans and leases receivable		482,537		484,435
Current year, charge-offs		0		0
Fiscal year before current year, charge-offs		0		0
Two years before current fiscal year, charge-offs		0		0
Three years before current fiscal year, charge-offs		0		0
Four years before current fiscal year, charge-offs		0		0
Prior, charge-offs		19		69
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		19		69
Residential real estate | Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		4,437		22,613
Fiscal year before current year		22,540		173,424
Two years before current year		171,091		131,621
Three years before current year		129,844		6,458
Four years before current year		6,339		15,508
Prior		85,373		71,433
Revolving loans amortized cost basis		55,093		56,844
Revolving loans converted to term		0		0
Loans and leases receivable		474,717		477,901
Residential real estate | Consumer | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		350
Two years before current year		1,066		1,236
Three years before current year		1,776		229
Four years before current year		226		545
Prior		4,747		3,993
Revolving loans amortized cost basis		5		181
Revolving loans converted to term		0		0
Loans and leases receivable		7,820		6,534
Manufactured housing
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		37,382		38,670
Loans and leases receivable, charge-offs		0	0
Manufactured housing | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		98
Prior		37,382		38,572
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		37,382		38,670
Current year, charge-offs		0		0
Fiscal year before current year, charge-offs		0		0
Two years before current fiscal year, charge-offs		0		0
Three years before current fiscal year, charge-offs		0		0
Four years before current fiscal year, charge-offs		0		0
Prior, charge-offs		0		0
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		0		0
Manufactured housing | Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		98
Prior		35,185		36,464
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		35,185		36,562
Manufactured housing | Consumer | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		0
Fiscal year before current year		0		0
Two years before current year		0		0
Three years before current year		0		0
Four years before current year		0		0
Prior		2,197		2,108
Revolving loans amortized cost basis		0		0
Revolving loans converted to term		0		0
Loans and leases receivable		2,197		2,108
Installment
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		792,606		874,926
Loans and leases receivable, charge-offs		16,917	$ 16,715
Installment | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		15,048		256,592
Fiscal year before current year		231,292		311,668
Two years before current year		271,803		160,132
Three years before current year		134,292		50,900
Four years before current year		54,125		40,430
Prior		37,024		3,534
Revolving loans amortized cost basis		49,015		51,670
Revolving loans converted to term		7		0
Loans and leases receivable		792,606		874,926
Current year, charge-offs		1,072		7,728
Fiscal year before current year, charge-offs		1,053		24,605
Two years before current fiscal year, charge-offs		6,220		23,984
Three years before current fiscal year, charge-offs		5,237		5,590
Four years before current fiscal year, charge-offs		1,273		6,797
Prior, charge-offs		2,062		1,238
Revolving loans amortized cost basis, charge-offs		0		0
Revolving loans converted to term, charge-offs		0		0
Loans and leases receivable, charge-offs		16,917		69,942
Installment | Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		15,048		253,958
Fiscal year before current year		227,664		307,566
Two years before current year		268,738		158,381
Three years before current year		132,929		50,354
Four years before current year		53,774		39,953
Prior		36,543		3,448
Revolving loans amortized cost basis		48,852		51,480
Revolving loans converted to term		7		0
Loans and leases receivable		783,555		865,140
Installment | Consumer | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0		2,634
Fiscal year before current year		3,628		4,102
Two years before current year		3,065		1,751
Three years before current year		1,363		546
Four years before current year		351		477
Prior		481		86
Revolving loans amortized cost basis		163		190
Revolving loans converted to term		0		0
Loans and leases receivable		9,051		9,786
Specialized lending | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and leases receivable		$ 5,104,405		$ 5,006,693
Charge-off of certain PCD loans	$ 6,200

Loans and Leases Receivable _10

Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 7,403	$ 12,550
Purchase price as a percentage of loans outstanding	100%	101.90%
Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 7,403	$ 5,445
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	0	2,867
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases	$ 0	$ 4,238

Leases - Lessee Narrative (Deta

Leases - Lessee Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	10 years
Operating cash flows from operating leases	$ 1.4	$ 1.7
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	4 months
Lessee, operating lease, term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	9 years
Lessee, operating lease, term	10 years

Leases - Right-of-Use Assets an

Leases - Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
ASSETS
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Operating lease ROU assets	$ 16,741	$ 15,644
LIABILITIES
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities	Other Liabilities
Operating lease liabilities	$ 18,987	$ 18,048

Leases - Lease, Cost (Details)

Leases - Lease, Cost (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases [Abstract]
Operating lease cost	$ 1,185,000	$ 1,218,000
Variable lease cost	$ 0	$ 0

Leases - Maturities of Non-Canc

Leases - Maturities of Non-Cancelable Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
2024	$ 3,683
2025	4,218
2026	3,462
2027	2,966
2028	2,600
Thereafter	3,667
Total minimum payments	20,596
Less: interest	1,609
Present value of lease liabilities	$ 18,987	$ 18,048

Leases - Summary of Lease Term

Leases - Summary of Lease Term and Discount Rate (Details)	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease, weighted average remaining lease term (years)	5 years 8 months 12 days	5 years 7 months 6 days
Operating lease, weighted average discount rate, percent	3.51%	3.28%

Leases - Lessor Narrative (Deta

Leases - Lessor Narrative (Details)	Mar. 31, 2024
Minimum
Lessor, Lease, Description [Line Items]
Lessor, lease, term of contract (years)	24 months
Maximum
Lessor, Lease, Description [Line Items]
Lessor, lease, term of contract (years)	120 months

Leases - Lessor, Lease Receivab

Leases - Lessor, Lease Receivables and Investment in Operating Leases and their Corresponding Balance Sheet Location (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Direct financing leases
Lease receivables	$ 198,187	$ 190,559
Guaranteed residual assets	16,796	15,783
Unguaranteed residual assets	10,010	10,010
Deferred initial direct costs	1,231	1,213
Unearned income	(14,076)	(11,891)
Net investment in direct financing leases	212,148	205,674
Operating leases
Investment in operating leases	278,379	282,208
Accumulated depreciation	(78,739)	(77,672)
Deferred initial direct costs	1,116	1,192
Net investment in operating leases	200,756	205,728
Total lease assets	$ 412,904	$ 411,402

Leases - Schedule of Operating

Leases - Schedule of Operating Lease and Direct Financing Receivables (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Operating leases
2024	$ 32,330
2025	39,137
2026	44,812
2027	33,566
2028	53,255
Thereafter	25,654
Total minimum payments	228,754
Direct financing leases
2024	38,847
2025	45,807
2026	38,092
2027	33,108
2028	23,609
Thereafter	19,850
Total minimum payments	199,313
Less: interest	1,126
Present value of lease receivables	$ 198,187

Deposits - Components of Deposi

Deposits - Components of Deposits (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deposits, by Component, Alternative [Abstract]
Demand, non-interest bearing	$ 4,688,880	$ 4,422,494
Demand, interest bearing	5,661,775	5,580,527
Savings, including money market deposit accounts	5,428,217	4,629,336
Time	2,182,511	3,287,879
Total deposits	$ 17,961,383	$ 17,920,236

Deposits - Schedule of Time Dep

Deposits - Schedule of Time Deposit Maturities (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deposit [Abstract]
2024	$ 1,300,535
2025	264,437
2026	361,940
2027	117,773
2028	137,768
Thereafter	58
Total time deposits	$ 2,182,511	$ 3,287,879

Deposits - Narrative (Detail)

Deposits - Narrative (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Deposit Liability [Line Items]
Time deposits greater than $250,000	$ 238.5	$ 186.3
Demand deposit overdrafts reclassified as loans	1.6	1.2
State and municipal deposits	1,100	1,100
Asset Pledged as Collateral
Deposit Liability [Line Items]
Available borrowing capacity through FHLB	$ 1,100	$ 1,100

Borrowings - Short-term Borrowi

Borrowings - Short-term Borrowings (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Total short-term debt	$ 0	$ 0

Borrowings - Summary of Bancorp

Borrowings - Summary of Bancorp's Short-term Borrowings (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Federal Reserve Bank Advances
Short-term Debt [Line Items]
Maximum outstanding at any month end	$ 0	$ 0
Average balance during the period	$ 0	$ 120,099
Weighted-average interest rate during the period	0%	5.23%
FHLB advances
Short-term Debt [Line Items]
Maximum outstanding at any month end	$ 0	$ 0
Average balance during the period	$ 0	$ 87,407
Weighted-average interest rate during the period	0%	5.16%
Federal Funds Purchased
Short-term Debt [Line Items]
Maximum outstanding at any month end	$ 0	$ 0
Average balance during the period	$ 0	$ 3,781
Weighted-average interest rate during the period	0%	4.97%

Borrowings - Narrative (Detail)

Borrowings - Narrative (Detail) - USD ($) $ in Billions	Mar. 31, 2024	Dec. 31, 2023
Federal Funds Purchased
Debt Instrument [Line Items]
Aggregate availability under federal funds line	$ 1.7	$ 1.7

Borrowings - FHLB and FRB Advan

Borrowings - FHLB and FRB Advances (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
FHLB advances	$ 1,200,000
Amount
2024	250,000
2025	200,000
2026	200,000
2027	450,000
2028	100,000
Thereafter	0
FHLB advances	$ 1,200,000
Rate
2024	3.44%
2025	4.45%
2026	4.32%
2027	3.70%
2028	4.19%
Thereafter	0%
Total maximum borrowing capacity with the FHLB	$ 3,431,804	$ 3,474,347
Total maximum borrowing capacity with the FRB	4,082,885	3,436,000
Total consumer loans receivable	11,884,664	11,889,120
Qualifying Assets Pledged as Collateral
Rate
Total consumer loans receivable	9,339,657	8,575,137
FHLB advances
Debt Instrument [Line Items]
Total long-term debt	$ 1,195,088	$ 1,203,207
FHLB advances, rate	3.91%	3.91%
Unamortized basis adjustments from interest rate swaps designated as fair value hedges of long-term advances from FHLB	$ (4,900)	$ 3,200
FHLB Advance Due June 2024
Debt Instrument [Line Items]
FHLB advances	250,000
Amount
FHLB advances	250,000
FHLB Advance Due March 2028
Debt Instrument [Line Items]
FHLB advances	950,000
Amount
FHLB advances	$ 950,000

Borrowings - Long-term Debt (De

Borrowings - Long-term Debt (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Senior Notes
Debt Instrument [Line Items]
Carrying Amount	$ 123,905,000	$ 123,840,000
Senior Subordinated Notes
Debt Instrument [Line Items]
Carrying Amount	182,300,000	182,230,000
Maturing August 2031 | Senior Notes
Debt Instrument [Line Items]
Carrying Amount	$ 98,963,000	98,928,000
Rate	2.875%
Issued Amount	$ 100,000,000
Price	100%
Maturing September 2024 | Senior Notes
Debt Instrument [Line Items]
Carrying Amount	$ 24,942,000	24,912,000
Rate	4.50%
Issued Amount	$ 25,000,000
Price	100%
Maturing December 2034 | Senior Subordinated Notes
Debt Instrument [Line Items]
Carrying Amount	$ 72,811,000	72,766,000
Rate	5.375%
Issued Amount	$ 74,750,000
Price	100%
Maturing June 2029 | Senior Subordinated Notes
Debt Instrument [Line Items]
Carrying Amount	$ 109,489,000	$ 109,464,000
Rate	6.125%
Issued Amount	$ 110,000,000
Price	100%
SOFR | Maturing August 2031 | Senior Notes
Debt Instrument [Line Items]
Spread on variable interest rate	2.35%
London Interbank Offered Rate (LIBOR) | Maturing June 2029 | Senior Subordinated Notes
Debt Instrument [Line Items]
Spread on variable interest rate	3.443%

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Detail) - series	Mar. 31, 2024	Dec. 31, 2023
Equity [Abstract]
Preferred stock, number of series outstanding	2	2

Shareholders' Equity - Preferre

Shareholders' Equity - Preferred Stock and Dividends Paid Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	5,700,000		5,700,000
Preferred stock, value	$ 137,794		$ 137,794
Series E Preferred Stock
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	2,300,000		2,300,000
Preferred stock, value	$ 55,593		$ 55,593
Initial Fixed Rate	6.45%
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.681630	$ 0.619313
Series E Preferred Stock | SOFR
Capital Unit [Line Items]
Floating rate of Three-Month SOFR Plus	5.14%
Series F Preferred Stock
Capital Unit [Line Items]
Preferred stock, shares issued (shares)	3,400,000		3,400,000
Preferred stock, value	$ 82,201		$ 82,201
Initial Fixed Rate	6%
Preferred stock, dividends, per share, cash paid (usd per share)	$ 0.657743	$ 0.595688
Series F Preferred Stock | SOFR
Capital Unit [Line Items]
Floating rate of Three-Month SOFR Plus	4.762%

Regulatory Capital - Narrative

Regulatory Capital - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2021
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer to risk weighted assets	2.50%
Cumulative Effect, Period of Adoption, Adjustment
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cumulative capital transition impact		$ 61.6
Capital transition provisions, benefit recognized, excluding amount previously phased in	$ 15.4

Regulatory Capital - Summary of

Regulatory Capital - Summary of Capital Amounts, Tier 1 Risk Based and Tier 1 Leveraged Ratios (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital (to risk weighted assets), Actual Amount	$ 1,695,246	$ 1,661,149
Tier 1 capital (to risk weighted assets), Actual Amount	1,833,039	1,798,942
Total capital (to risk weighted assets), Actual Amount	2,129,343	2,076,550
Tier 1 capital (to average assets), Actual Amount	$ 1,833,039	$ 1,798,942
Common equity Tier 1 (to risk weighted assets), Actual Ratio	12.622%	12.23%
Tier 1 capital (to risk weighted assets), Actual Ratio	0.13648	0.13245
Total capital (to risk weighted assets), Actual Ratio	0.15854	0.15289
Tier 1 capital (to average assets), Actual Ratio	0.08512	0.08375
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 604,410	$ 611,200
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	805,880	814,933
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	1,074,506	1,086,578
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 861,350	$ 859,189
Common equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.06000	0.06000
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.08000	0.08000
Tier 1 capital (to average assets), For Capital Adequacy Purposes Ratio	0.04000	0.04000
Common equity Tier 1 (to risk weighted assets), for Basel III amount	$ 940,193	$ 950,755
Tier 1 (to risk weighted assets) Required for Basel III amount	1,141,663	1,154,489
Total capital (to risk weighted assets), for Basel III amount	1,410,290	1,426,133
Tier 1 (to risk average assets), for Basel III amount	$ 861,350	$ 859,189
Common equity Tier 1 (to risk weighted assets), for Basel III ratio	7%	7%
Tier 1 capital (to risk weighted assets), for Basel III ratio	8.50%	8.50%
Total capital (to risk weighted assets), for Basel III ratio	10.50%	10.50%
Tier 1 capital (to average assets), for Basel III ratio	4%	4%
Customers Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity Tier 1 capital (to risk weighted assets), Actual Amount	$ 1,898,686	$ 1,868,360
Tier 1 capital (to risk weighted assets), Actual Amount	1,898,686	1,868,360
Total capital (to risk weighted assets), Actual Amount	2,122,179	2,073,202
Tier 1 capital (to average assets), Actual Amount	$ 1,898,686	$ 1,868,360
Common equity Tier 1 (to risk weighted assets), Actual Ratio	14.155%	13.773%
Tier 1 capital (to risk weighted assets), Actual Ratio	0.14155	0.13773
Total capital (to risk weighted assets), Actual Ratio	0.15822	0.15283
Tier 1 capital (to average assets), Actual Ratio	0.08824	0.08708
Common equity Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 603,597	$ 610,453
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	804,797	813,937
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	1,073,062	1,085,250
Tier 1 capital (to average assets), For Capital Adequacy Purposes Amount	$ 860,686	$ 858,225
Common equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.06000	0.06000
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	0.08000	0.08000
Tier 1 capital (to average assets), For Capital Adequacy Purposes Ratio	0.04000	0.04000
Common equity Tier 1 Capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 871,863	$ 881,765
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	1,073,062	1,085,250
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	1,341,328	1,356,562
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 1,075,857	$ 1,072,782
Common equity Tier 1 (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.08000	0.08000
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.10000	0.10000
Tier 1 capital (to average assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.05000	0.05000
Common equity Tier 1 (to risk weighted assets), for Basel III amount	$ 938,929	$ 949,594
Tier 1 (to risk weighted assets) Required for Basel III amount	1,140,128	1,153,078
Total capital (to risk weighted assets), for Basel III amount	1,408,394	1,424,390
Tier 1 (to risk average assets), for Basel III amount	$ 860,686	$ 858,225
Common equity Tier 1 (to risk weighted assets), for Basel III ratio	7%	7%
Tier 1 capital (to risk weighted assets), for Basel III ratio	8.50%	8.50%
Total capital (to risk weighted assets), for Basel III ratio	10.50%	10.50%
Tier 1 capital (to average assets), for Basel III ratio	4%	4%

Disclosures About Fair Value _3

Disclosures About Fair Value of Financial Instruments - Narrative (Detail)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Loans held for sale, number of days held prior to sale (up to)	90 days
Loans held for sale, average life from purchase to sale	30 days

Disclosures About Fair Value _4

Disclosures About Fair Value of Financial Instruments - Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Cash and cash equivalents, Carrying Amount	$ 3,701,120	$ 3,846,346
Cash and cash equivalents, Estimated Fair Value	3,701,120	3,846,346
Debt securities, available for sale	2,571,139	2,376,860
Debt securities, held to maturity	1,032,037	1,103,170
Debt securities, held to maturity, fair value	972,628	1,046,439
Loans held for sale	357,640	340,317
Total loans and leases receivable, net of allowance for credit losses on loans and leases	12,765,935	12,726,456
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	12,551,635	12,513,386
FHLB, Federal Reserve Bank and other restricted stock, Carrying Amount	100,067	109,548
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	100,067	109,548
Derivative assets	21,437	17,931
Liabilities:
Deposits held	17,961,383	17,920,236
Deposits, Estimated Fair Value	17,958,161	17,922,005
FHLB advances, Carrying Amount	1,195,088	1,203,207
FHLB advances, Estimated Fair Value	1,180,285	1,188,517
Other borrowings, Carrying Amount	123,905	123,840
Other borrowings, Estimated Fair Value	105,761	103,674
Subordinated debt, Carrying Amount	182,300	182,230
Subordinated debt, Estimated Fair Value	163,417	164,233
Derivative liabilities	31,958	27,110
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents, Estimated Fair Value	3,701,120	3,846,346
Debt securities, available for sale	0	0
Debt securities, held to maturity, fair value	0	0
Loans held for sale	0	0
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	0	0
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	0	0
Derivative assets	0	0
Liabilities:
Deposits, Estimated Fair Value	15,778,872	14,632,357
FHLB advances, Estimated Fair Value	0	0
Other borrowings, Estimated Fair Value	0	0
Subordinated debt, Estimated Fair Value	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents, Estimated Fair Value	0	0
Debt securities, available for sale	2,542,876	2,341,911
Debt securities, held to maturity, fair value	465,025	472,311
Loans held for sale	870	1,215
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	962,610	897,912
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	100,067	109,548
Derivative assets	21,360	17,906
Liabilities:
Deposits, Estimated Fair Value	2,179,289	3,289,648
FHLB advances, Estimated Fair Value	1,180,285	1,188,517
Other borrowings, Estimated Fair Value	105,761	103,674
Subordinated debt, Estimated Fair Value	163,417	164,233
Derivative liabilities	31,958	27,110
Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents, Estimated Fair Value	0	0
Debt securities, available for sale	28,263	34,949
Debt securities, held to maturity, fair value	507,603	574,128
Loans held for sale	356,770	339,102
Total loans and leases receivable, net of allowance for credit losses on loans and leases, Estimated Fair Value	11,589,025	11,615,474
FHLB, Federal Reserve Bank and other restricted stock, Estimated Fair Value	0	0
Derivative assets	77	25
Liabilities:
Deposits, Estimated Fair Value	0	0
FHLB advances, Estimated Fair Value	0	0
Other borrowings, Estimated Fair Value	0	0
Subordinated debt, Estimated Fair Value	0	0
Derivative liabilities	$ 0	$ 0

Disclosures About Fair Value _5

Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Fair Value	$ 2,571,139	$ 2,376,860
Fair Value, Measurements, Recurring
Assets
Assets, fair value	3,775,071	3,481,980
Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	7,747	2,373
Asset-backed securities
Assets
Fair Value	58,234	92,629
Asset-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	58,234	92,629
Agency-guaranteed residential mortgage-backed securities
Assets
Fair Value	86,412
Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	86,412
Agency-guaranteed residential collateralized mortgage obligations
Assets
Fair Value	124,958	116,908
Agency-guaranteed residential collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	124,958	116,908
Agency-guaranteed commercial collateralized mortgage obligations
Assets
Fair Value	33,774
Agency-guaranteed commercial collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	33,774
Collateralized loan obligations
Assets
Fair Value	584,495	489,092
Collateralized loan obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	584,495	489,092
Commercial mortgage-backed securities
Assets
Fair Value	112,626	121,636
Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	112,626	121,636
Corporate notes
Assets
Fair Value	610,470	583,034
Corporate notes | Fair Value, Measurements, Recurring
Assets
Fair Value	610,470	583,034
Private label collateralized mortgage obligations
Assets
Fair Value	960,170	973,561
Private label collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	960,170	973,561
Derivatives | Fair Value, Measurements, Recurring
Assets
Assets, fair value	21,437	17,931
Loans held for sale – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	219,885	189,277
Loans receivable, mortgage finance – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	962,610	897,912
Derivatives  | Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	31,958	27,110
Collateral-dependent loans | Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	7,747	2,373
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency-guaranteed residential collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency-guaranteed commercial collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized loan obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate notes | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Private label collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivatives | Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans receivable, mortgage finance – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivatives  | Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateral-dependent loans | Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	0	0
Significant Other Observable Inputs (Level 2)
Assets
Fair Value	2,542,876	2,341,911
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Assets
Assets, fair value	3,527,716	3,258,944
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	0	0
Significant Other Observable Inputs (Level 2) | Asset-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	29,971	57,680
Significant Other Observable Inputs (Level 2) | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	86,412
Significant Other Observable Inputs (Level 2) | Agency-guaranteed residential collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	124,958	116,908
Significant Other Observable Inputs (Level 2) | Agency-guaranteed commercial collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	33,774
Significant Other Observable Inputs (Level 2) | Collateralized loan obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	584,495	489,092
Significant Other Observable Inputs (Level 2) | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	112,626	121,636
Significant Other Observable Inputs (Level 2) | Corporate notes | Fair Value, Measurements, Recurring
Assets
Fair Value	610,470	583,034
Significant Other Observable Inputs (Level 2) | Private label collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	960,170	973,561
Significant Other Observable Inputs (Level 2) | Derivatives | Fair Value, Measurements, Recurring
Assets
Assets, fair value	21,360	17,906
Significant Other Observable Inputs (Level 2) | Loans held for sale – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	870	1,215
Significant Other Observable Inputs (Level 2) | Loans receivable, mortgage finance – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	962,610	897,912
Significant Other Observable Inputs (Level 2) | Derivatives  | Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	31,958	27,110
Significant Other Observable Inputs (Level 2) | Collateral-dependent loans | Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	0	0
Significant Unobservable Inputs (Level 3)
Assets
Fair Value	28,263	34,949
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Assets
Assets, fair value	247,355	223,036
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	7,747	2,373
Significant Unobservable Inputs (Level 3) | Asset-backed securities
Assets
Fair Value	28,263	34,949
Significant Unobservable Inputs (Level 3) | Asset-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	28,263	34,949
Significant Unobservable Inputs (Level 3) | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	0
Significant Unobservable Inputs (Level 3) | Agency-guaranteed residential collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | Agency-guaranteed commercial collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0
Significant Unobservable Inputs (Level 3) | Collateralized loan obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | Corporate notes | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | Private label collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets
Fair Value	0	0
Significant Unobservable Inputs (Level 3) | Derivatives | Fair Value, Measurements, Recurring
Assets
Assets, fair value	77	25
Significant Unobservable Inputs (Level 3) | Loans held for sale – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	219,015	188,062
Significant Unobservable Inputs (Level 3) | Loans receivable, mortgage finance – fair value option | Fair Value, Measurements, Recurring
Assets
Assets, fair value	0	0
Significant Unobservable Inputs (Level 3) | Derivatives  | Fair Value, Measurements, Recurring
Liabilities
Financial liabilities, fair value	0	0
Significant Unobservable Inputs (Level 3) | Collateral-dependent loans | Fair Value, Measurements, Nonrecurring
Assets
Assets, fair value	$ 7,747	$ 2,373

Disclosures About Fair Value _6

Disclosures About Fair Value of Financial Instruments - Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Detail) - Significant Unobservable Inputs (Level 3) - Asset-backed securities - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Asset-backed securities
Balance at beginning of period	$ 34,949	$ 73,266
Principal payments and premium amortization	(7,114)	(11,216)
Increase in allowance for credit losses	0	(273)
Decrease in allowance for credit losses	33	61
Change in fair value recognized in OCI	395	1,538
Balance at end of period	$ 28,263	$ 63,376

Disclosures About Fair Value _7

Disclosures About Fair Value of Financial Instruments - Statement of Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis (Details) - Significant Unobservable Inputs (Level 3) - Fair Value, Measurements, Recurring - Other Installment Loans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Installment Loans
Balance at beginning of period	$ 188,062	$ 0
Originations	235,431	0
Sales	(158,215)	0
Principal payments	(46,263)	0
Change in fair value recognized in earnings	0	0
Balance at end of period	$ 219,015	$ 0

Disclosures About Fair Value _8

Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Financial Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis (Detail) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 2,571,139	$ 2,376,860
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	28,263	34,949
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	58,234	92,629
Asset-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 28,263	$ 34,949
Minimum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.10	0.12
Minimum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Annualized loss rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.03	0.03
Minimum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Constant prepayment rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.10	0.11
Maximum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.13	0.14
Maximum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Annualized loss rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.15	0.13
Maximum | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Constant prepayment rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.30	0.30
Weighted Average | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.12	0.13
Weighted Average | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Annualized loss rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.06	0.05
Weighted Average | Asset-backed securities | Significant Unobservable Inputs (Level 3) | Constant prepayment rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.26	0.26

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) derivative	Mar. 31, 2024 USD ($) derivative
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, net liability position, aggregate fair value		$ 19,800
Cash collateral received		20,900
Interest rate derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral received	$ 16,939	$ 19,772
Interest rate derivatives | Derivative Designated as Hedging Instrument | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Number of outstanding interest rate derivatives | derivative	6	6
Aggregate notional amount	$ 472,500	$ 472,500
Number of interest rate derivatives entered into during the period | derivative	5
Notional amount of derivatives entered into during the period	$ 1,000,000
Number of interest rate derivatives terminated | derivative	2
Aggregate notional amount, terminated	$ 550,000
Notional amount of basis adjustments	4,600
Interest rate swaps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 1,200,000	$ 1,200,000
Number of derivative instruments held | derivative	132	128
Interest rate caps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount	$ 55,600	$ 55,600
Number of derivative instruments held | derivative	2	2

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Cumulative Basis Adjustment for Fair Value Hedges (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
AFS debt securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	$ 22,500	$ 22,500
Unamortized basis adjustments from interest rate swaps designated as fair value hedges of long-term advances from FHLB	764	941
Deposits
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	300,000	300,000
Unamortized basis adjustments from interest rate swaps designated as fair value hedges of long-term advances from FHLB	1,079	1,432
FHLB advances
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amortized Cost	700,000	700,000
Unamortized basis adjustments from interest rate swaps designated as fair value hedges of long-term advances from FHLB	$ (4,912)	$ 3,206

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Fair Value of Derivative Financial Instruments (Detail) - Not Designated as Hedging Instrument - Interest rate swaps and caps - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Other Assets
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Assets	$ 21,359	$ 17,903
Other Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liabilities	$ 31,956	$ 27,097

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Effect of Derivative Financial Instruments on Net Income and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative Designated as Hedging Instrument | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	$ 0	$ 0
Derivative Designated as Hedging Instrument | Interest rate swaps | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	8,173	(301)
Derivative Designated as Hedging Instrument | AFS debt securities | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	(177)	301
Derivative Designated as Hedging Instrument | FHLB advances | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	(7,996)	0
Not Designated as Hedging Instrument | Interest rate swaps and caps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in Earnings	$ 672	$ (24)

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Assets and Derivative Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Gross amounts not offset in the consolidated balance sheet, Cash collateral received/posted	$ (20,900)
Interest rate derivatives
Offsetting Assets [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheet	20,701	$ 17,439
Gross amounts not offset in the consolidated balance sheet, Financial instruments	(929)	(500)
Gross amounts not offset in the consolidated balance sheet, Cash collateral received/posted	(19,772)	(16,939)
Gross amounts not offset in the consolidated balance sheet, Net amount	$ 0	$ 0

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities - Summary of Offsetting of Financial Liabilities and Derivative Liabilities (Detail) - Interest rate derivatives - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Offsetting Liabilities [Line Items]
Gross Amounts Recognized on the Consolidated Balance Sheet	$ 929	$ 500
Gross amounts not offset in the consolidated balance sheet, financial instruments	(929)	(500)
Gross amounts not offset in the consolidated balance sheet, Cash collateral received/posted	0	0
Gross amounts not offset in the consolidated balance sheet, Net amount	$ 0	$ 0