Amerant Bancorp (AMTB) 10-Q 12 Nov 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 12, 2019
Entity Registrant Name	Amerant Bancorp Inc.
Entity Central Index Key	0001734342
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Class A common stock
Entity Common Stock, Shares Outstanding		28,988,579
Class B common stock
Entity Common Stock, Shares Outstanding		14,218,596

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 32,363	$ 25,756
Interest earning deposits with banks	68,964	59,954
Cash and cash equivalents	101,327	85,710
Securities
Available for sale	1,485,202	1,586,051
Held to maturity	77,611	85,188
Federal Reserve Bank and Federal Home Loan Bank stock	70,172	70,189
Securities	1,632,985	1,741,428
Loans held for sale	1,918	0
Loans held for investment, gross	5,751,791	5,920,175
Less: Allowance for loan losses	53,640	61,762
Loans held for investment, net	5,698,151	5,858,413
Bank owned life insurance	210,414	206,142
Premises and equipment, net	126,497	123,503
Deferred tax assets, net	5,392	16,310
Goodwill	19,193	19,193
Accrued interest receivable and other assets	68,383	73,648
Total assets	7,864,260	8,124,347
Deposits
Noninterest bearing	805,032	768,822
Interest bearing	1,123,767	1,288,030
Savings and money market	1,484,336	1,588,703
Time	2,279,713	2,387,131
Total deposits	5,692,848	6,032,686
Advances from the Federal Home Loan Bank and other borrowings	1,170,000	1,166,000
Junior subordinated debentures held by trust subsidiaries	92,246	118,110
Accounts payable, accrued liabilities and other liabilities	83,415	60,133
Total liabilities	7,038,509	7,376,929
Commitments and contingencies (Note 13)
Stockholders’ equity
Additional paid in capital	418,821	385,367
Retained earnings	431,521	393,662
Accumulated other comprehensive income (loss)	17,108	(18,164)
Total stockholders' equity	825,751	747,418
Total liabilities and stockholders' equity	7,864,260	8,124,347
Class A common stock
Stockholders’ equity
Common stock	2,899	2,686
Class B common stock
Stockholders’ equity
Common stock	1,775	1,775
Treasury stock, at cost; 3,532,457 shares of Class B common stock (2018: 1,420,136 shares of Class B common stock)	$ (46,373)	$ (17,908)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Class A common stock
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	28,985,996	26,851,832
Common stock, shares outstanding (in shares)	28,985,996	26,851,832
Class B common stock
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	17,751,053	17,751,053
Common stock, shares outstanding (in shares)	14,218,596	16,330,917
Treasury stock (in shares)	3,532,457	1,420,136

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest income
Loans	$ 66,118	$ 66,776	$ 199,641	$ 188,894
Investment securities	11,325	12,183	35,792	36,633
Interest earning deposits with banks	761	666	2,304	1,945
Total interest income	78,204	79,625	237,737	227,472
Interest expense
Interest bearing demand deposits	191	211	766	413
Savings and money market deposits	4,125	3,477	11,872	9,165
Time deposits	13,284	11,531	38,577	30,403
Advances from the Federal Home Loan Bank	6,253	6,716	18,750	19,217
Junior subordinated debentures	1,748	2,057	5,943	6,017
Securities sold under agreements to repurchase	3	0	3	2
Total interest expense	25,604	23,992	75,911	65,217
Net interest income	52,600	55,633	161,826	162,255
(Reversal of) provision for loan losses	(1,500)	1,600	(2,850)	1,750
Net interest income after (reversal of) provision for loan losses	54,100	54,033	164,676	160,505
Noninterest income
Deposits and service fees	4,366	4,269	12,793	13,322
Brokerage, advisory and fiduciary activities	3,647	4,148	11,071	12,989
Change in cash surrender value of bank owned life insurance	1,449	1,454	4,272	4,372
Cards and trade finance servicing fees	1,034	1,145	3,368	3,380
Gain on early extinguishment of advances from the Federal Home Loan Bank	0	0	557	882
Securities gains (losses), net	906	(15)	1,902	1
Data processing and fees for other services	70	523	955	2,017
Other noninterest income	2,364	1,426	6,221	4,918
Total noninterest income	13,836	12,950	41,139	41,881
Noninterest expense
Salaries and employee benefits	33,862	33,967	101,356	102,940
Occupancy and equipment	3,878	4,044	12,152	11,819
Professional and other services fees	4,295	4,268	11,693	16,099
Telecommunication and data processing	3,408	3,043	9,667	9,138
Depreciation and amortization	1,928	1,997	5,880	6,083
FDIC assessments and insurance	597	1,578	3,167	4,493
Other operating expenses	4,769	3,145	13,672	9,753
Total noninterest expenses	52,737	52,042	157,587	160,325
Net income before income tax	15,199	14,941	48,228	42,061
Income tax expense	(3,268)	(3,390)	(10,369)	(10,658)
Net income	11,931	11,551	37,859	31,403
Other comprehensive income (loss), net of tax
Net unrealized holding gains (losses) on securities available for sale arising during the period	6,866	(4,938)	37,457	(25,369)
Net unrealized holding gains on cash flow hedges arising during the period	68	1,840	57	8,209
Reclassification adjustment for net gains included in net income	(965)	(160)	(2,242)	(18)
Other comprehensive income (loss)	5,969	(3,258)	35,272	(17,178)
Comprehensive income	$ 17,900	$ 8,293	$ 73,131	$ 14,225
Earnings Per Share (Note 15):
Basic earnings per common share (in dollars per share)	$ 0.28	$ 0.27	$ 0.89	$ 0.74
Diluted earnings per common share (in dollars per share)	$ 0.28	$ 0.27	$ 0.88	$ 0.74

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Class A	Class B	Common StockClass A	Common StockClass B	Additional Paid in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Shares outstanding (in shares) at Dec. 31, 2017				24,737,470	17,751,053
Beginning balance at Dec. 31, 2017	$ 753,450			$ 2,474	$ 1,775	$ 367,505	$ 0	$ 387,829	$ (6,133)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends	(40,000)							(40,000)
Net income	31,403							31,403
Other comprehensive (loss) income	(17,178)								(17,178)
Shares outstanding (in shares) at Sep. 30, 2018				24,737,470	17,751,053
Ending balance at Sep. 30, 2018	727,675			$ 2,474	$ 1,775	367,505	0	379,232	(23,311)
Shares outstanding (in shares) at Dec. 31, 2018		26,851,832	16,330,917	26,851,832	16,330,917
Beginning balance at Dec. 31, 2018	747,418			$ 2,686	$ 1,775	385,367	(17,908)	393,662	(18,164)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued (in shares)				2,132,865
Common stock issued	29,218			$ 213		29,005
Repurchase of Class B common stock (in shares)					(2,112,321)
Repurchase of Class B common stock	(28,465)						(28,465)
Restricted stock issued (in shares)				1,299
Restricted stock issued	0
Stock-based compensation expense	4,449					4,449
Net income	37,859							37,859
Other comprehensive (loss) income	35,272								35,272
Shares outstanding (in shares) at Sep. 30, 2019		28,985,996	14,218,596	28,985,996	14,218,596
Ending balance at Sep. 30, 2019	$ 825,751			$ 2,899	$ 1,775	$ 418,821	$ (46,373)	$ 431,521	$ 17,108

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 37,859	$ 31,403
Adjustments to reconcile net income to net cash provided by operating activities
(Reversal of) provision for loan losses	(2,850)	1,750
Net premium amortization on securities	10,763	12,855
Depreciation and amortization	5,880	6,083
Stock-based compensation expense	4,449	0
Change in cash surrender value of bank owned life insurance	(4,272)	(4,372)
Deferred taxes, securities net gains or losses and others	(3,394)	(3,143)
Net changes in operating assets and liabilities:
Accrued interest receivable and other assets	16,917	2,543
Accounts payable, accrued liabilities and other liabilities	10,511	(6,430)
Net cash provided by operating activities	75,863	40,689
Purchases of investment securities:
Available for sale	(290,059)	(166,703)
Federal Home Loan Bank stock	(24,319)	(24,055)
Purchases of investment securities	(314,378)	(190,758)
Maturities, sales and calls of investment securities:
Available for sale	430,118	178,981
Held to maturity	7,182	3,335
Federal Home Loan Bank stock	24,336	16,576
Maturities, sales and calls of investment securities	461,636	198,892
Net increase in loans	(98,478)	(153,019)
Proceeds from loan portfolio sales	259,754	60,856
Net purchases of premises and equipment, and others	(8,384)	(5,556)
Net proceeds from sale of subsidiary	0	7,500
Net cash provided by (used in) investing activities	300,150	(82,085)
Cash flows from financing activities
Net decrease in demand, savings and money market accounts	(232,420)	(266,159)
Net (decrease) increase in time deposits	(107,418)	132,689
Proceeds from Advances from the Federal Home Loan Bank and other borrowings	935,000	941,000
Repayments of Advances from the Federal Home Loan Bank and other borrowings	(930,447)	(776,000)
Redemption of junior subordinated debentures	(25,864)	0
Dividend paid	0	(40,000)
Proceeds from common stock issued - Class A	29,218	0
Repurchase of common stock - Class B	(28,465)	0
Net cash used in financing activities	(360,396)	(8,470)
Net increase (decrease) in cash and cash equivalents	15,617	(49,866)
Cash and cash equivalents
Beginning of period	85,710	153,445
End of period	101,327	103,579
Supplemental disclosures of cash flow information
Cash paid for Interest	74,928	63,987
Cash paid for Income taxes	$ 6,699	$ 18,649

Business, Basis of Presentation

Business, Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business, Basis of Presentation and Summary of Significant Accounting Policies	Business, Basis of Presentation and Summary of Significant Accounting Policies a) Business Amerant Bancorp Inc., formerly Mercantil Bank Holding Corporation, (the “Company”), is a Florida corporation incorporated in 1985, which has operated since January 1987. The Company is a bank holding company registered under the Bank Holding Company Act of 1956, as a result of its 100% indirect ownership of Amerant Bank, N.A. (the “Bank”). The Company’s principal office is in the City of Coral Gables, Florida. The Bank is a member of the Federal Reserve Bank of Atlanta (“Federal Reserve Bank”) and the Federal Home Loan Bank of Atlanta (“FHLB”). The Bank has two principal subsidiaries, Amerant Investments, Inc., a securities broker-dealer (“Amerant Investments”), and Amerant Trust, N.A, a non-depository trust company (“Amerant Trust”). The Company’s Class A common stock, par value $0.10 per common share, and Class B common stock, par value $0.10 per common share, are listed and trade on the Nasdaq Global Select Market under the symbols “AMTB” and “AMTBB,” respectively. Reportable Segments Beginning in the second quarter of 2019, the Company is managed using a single segment concept, on a consolidated basis, and management determined to that no separate current or historical reportable segment disclosures are required under generally accepted accounting principles in the United States of America (“U.S. GAAP”). Initial Public Offering and Shares Repurchase On December 21, 2018, the Company completed an initial public offering (the “IPO”). For more information about the IPO, see Note 15 to our audited consolidated financial statements included in the Company’s annual report on Form 10-K filed with the U.S. Securities and Exchange Commission (the “SEC”) on April 1, 2019 (the “Form 10-K”). In March 2019, following the partial exercise of the over-allotment option by the IPO’s underwriters, and completion of certain private placements of shares of the Company’s Class A common stock, the Company repurchased the remaining shares of its Class B common stock held by Mercantil Servicios Financieros, C.A., the Company’s former parent company (“MSF” or “the Former Parent”). See Note 12 to these unaudited interim consolidated financial statements for more information about the private placements and the repurchase of Class B common stock previously held by MSF. No shares have been repurchased since March 2019. Rebranding On June 4, 2019, the Company’s stockholders approved an amendment to the Company’s Amended and Restated Articles of Incorporation (the “Articles of Incorporation”) to change the Company’s name from “Mercantil Bank Holding Corporation” to “Amerant Bancorp Inc.” (the “Name Change”). The Name Change became effective on June 5, 2019. Each of the Company, the Bank and its principal subsidiaries now operate under the “Amerant” brand. b) Basis of Presentation and Summary of Significant Accounting Policies The accompanying unaudited interim consolidated financial statements have been prepared in accordance with U.S. GAAP for interim financial information and the instructions to Form 10-Q and Article 10 of SEC Regulation S-X. Accordingly, they do not include all of the information and footnotes required for a fair statement of financial position, results of operations and cash flows in conformity with U.S. GAAP. These unaudited interim consolidated financial statements reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the interim periods presented. These adjustments are of a normal, recurring nature. Interim period operating results may not be indicative of the operating results for a full year or any other period. These unaudited interim consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements as of December 31, 2018 and 2017 and for each of the three years in the period ended December 31, 2018 and the accompanying footnote disclosures for the Company, which are included in the Form 10-K. For a complete summary of our significant accounting policies, please see Note 1 to the Company’s audited consolidated financial statements in the Form 10-K. Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates made by management include: (i) the determination of the allowance for loan losses; (ii) the fair values of securities and the value assigned to goodwill during the annual goodwill impairment test; (iii) the cash surrender value of bank owned life insurance; and (iv) the determination of whether the amount of deferred tax assets will more likely than not be realized. Management believes that these estimates are appropriate. Actual results could differ from these estimates. c) Recently Issued Accounting Pronouncements Issued and Not Yet Adopted Revenue from Contracts with Customers In May 2014, the Financial Accounting Standards Board (“FASB”) issued a common revenue standard for recognizing revenue from contracts with customers. This new standard establishes principles for reporting information about the nature, amount, timing, and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The scope of the guidance excludes net interest income and many other revenues from financial assets. Although the Company has not finalized the evaluation, we do not expect the adoption to have a material impact on its consolidated financial position or results of operations. The Company plans to adopt the new guidance during the fourth quarter of 2019. Recognition and Measurement of Financial Instruments In January 2016, the FASB issued changes to the guidance on the recognition and measurement of financial instruments. The changes include, among others, the removal of the available-for-sale category for equity securities and updates to certain disclosure requirements. As of September 30, 2019, the Company classifies $23.7 million as available for sale equity securities. The Company currently expects that its available for sale equity securities consisting of a mutual fund investment that qualify for Community Reinvestment Act (“CRA”) purposes will be reclassified out of the available for sale classification and presented separately on the face of the consolidated balance sheet. At adoption, the Company currently expects that the cumulative unrealized loss of these securities previously recognized in AOCL will be recorded as an adjustment to the opening balance of retained earnings. Any further changes to the fair value of equity securities, other than equity method investments, will be recorded in net income. At September 30, 2019, the cumulative unrealized gross loss on this available for sale equity investment was $0.3 million . The Company plans to adopt the new guidance during the fourth quarter of 2019. New Guidance on Leases In December 2018, the FASB issued amendments to new guidance issued in February 2016 for the recognition and measurement of all leases which has not yet been adopted by the Company. The amendments address certain lessor’s issues associated with: (i) sales taxes and other similar taxes collected from lessees, (ii) certain lessor costs and (iii) recognition of variable payments for contracts with lease and nonlease components. The new guidance on leases issued in February 2016 requires lessees to recognize a right-of-use asset and a lease liability for most leases within the scope of the guidance. There were no significant changes to the guidance for lessors. These amendments, and the related pending new guidance, can be adopted using a modified retrospective transition at the beginning of the earliest comparative period presented, and provides for certain practical expedients. The amendments and related new guidance on leases are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020, for private companies, and for fiscal periods beginning after December 15, 2018, and interim periods within those fiscal years, for public companies. Early adoption is permitted. The Company has completed the process of gathering a complete inventory of leases and migrating identified lease data onto a new system and is in the final stages of testing and evaluation. We currently expect to recognize an asset and a corresponding lease liability for an amount currently expected to be less than 1% of the Company’s total consolidated assets at adoption. The Company plans to adopt the new guidance during the first semester of 2020. d) Subsequent Events The effects of significant subsequent events, if any, have been recognized or disclosed in these unaudited interim consolidated financial statements.

Securities

Securities	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Securities	Securities Amortized cost and approximate fair values of securities available for sale are summarized as follows: September 30, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses U.S. government-sponsored enterprise debt securities $ 930,638 $ 12,761 $ (3,139 ) $ 940,260 Corporate debt securities 239,078 4,281 (210 ) 243,149 U.S. government agency debt securities 228,042 1,382 (2,780 ) 226,644 Municipal bonds 47,649 2,549 — 50,198 Mutual funds 24,270 — (313 ) 23,957 U.S. treasury securities 994 — — 994 $ 1,470,671 $ 20,973 $ (6,442 ) $ 1,485,202 December 31, 2018 Amortized Gross Unrealized Estimated (in thousands) Gains Losses U.S. government-sponsored enterprise debt securities $ 840,760 $ 2,197 $ (22,178 ) $ 820,779 Corporate debt securities 357,602 139 (5,186 ) 352,555 U.S. government agency debt securities 221,682 187 (4,884 ) 216,985 Municipal bonds 162,438 390 (2,616 ) 160,212 Mutual funds 24,266 — (1,156 ) 23,110 Commercial paper 12,448 — (38 ) 12,410 $ 1,619,196 $ 2,913 $ (36,058 ) $ 1,586,051 At September 30, 2019 and December 31, 2018 , the Company had no foreign sovereign or foreign government agency debt securities. The Company’s securities available for sale with unrealized losses that are deemed temporary, aggregated by the length of time that individual securities have been in a continuous unrealized loss position, are summarized below: September 30, 2019 Less Than 12 Months 12 Months or More Total (in thousands) Estimated Unrealized Estimated Unrealized Estimated Unrealized U.S. government-sponsored enterprise debt securities $ 130,186 $ (636 ) $ 276,102 $ (2,503 ) $ 406,288 $ (3,139 ) Corporate debt securities 13,967 (101 ) 17,110 (109 ) 31,077 (210 ) Municipal bonds — — — — — — U.S. government agency debt securities 15,718 (46 ) 124,128 (2,734 ) 139,846 (2,780 ) Mutual funds — — 23,707 (313 ) 23,707 (313 ) Commercial paper — — — — — — $ 159,871 $ (783 ) $ 441,047 $ (5,659 ) $ 600,918 $ (6,442 ) December 31, 2018 Less Than 12 Months 12 Months or More Total (in thousands) Estimated Unrealized Estimated Unrealized Estimated Unrealized U.S. government-sponsored enterprise debt securities $ 90,980 $ (2,995 ) $ 608,486 $ (19,183 ) $ 699,466 $ (22,178 ) Corporate debt securities 243,667 (3,800 ) 75,762 (1,386 ) 319,429 (5,186 ) Municipal bonds 63,580 (939 ) 133,886 (3,945 ) 197,466 (4,884 ) U.S. government agency debt securities 1,449 (6 ) 94,331 (2,610 ) 95,780 (2,616 ) Mutual funds — — 22,865 (1,156 ) 22,865 (1,156 ) Commercial paper 12,410 (38 ) — — 12,410 (38 ) $ 412,086 $ (7,778 ) $ 935,330 $ (28,280 ) $ 1,347,416 $ (36,058 ) At September 30, 2019 and December 31, 2018 , the Company held certain debt securities issued or guaranteed by U.S. government-sponsored entities and agencies. The Company believes these issuers to present little credit risk. The Company does not consider these securities to be other-than-temporarily impaired because the decline in fair value is attributable to changes in interest rates and investment securities markets, generally, and not credit quality. The Company does not intend to sell these debt securities and it is more likely than not that it will not be required to sell the securities before their anticipated recovery. Unrealized losses on corporate debt securities and mutual funds at September 30, 2019 , and corporate debt securities, municipal bonds, mutual funds and commercial paper at December 31, 2018 , are attributable to changes in interest rates and investment securities markets, generally, and as a result, temporary in nature. The Company does not consider these securities to be other-than-temporarily impaired because the issuers of these debt securities are considered to be high quality, and management does not intend to sell these investments and it is more likely than not that it will not be required to sell these investments before their anticipated recovery. Amortized cost and approximate fair values of securities held to maturity, are summarized as follows: September 30, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses Securities Held to Maturity - U.S. government-sponsored enterprise debt securities $ 74,861 $ 1,090 $ (124 ) $ 75,827 U.S. Government agency debt securities 2,750 93 — 2,843 $ 77,611 $ 1,183 $ (124 ) $ 78,670 December 31, 2018 Amortized Gross Unrealized Estimated (in thousands) Gains Losses Securities Held to Maturity - U.S. government-sponsored enterprise debt securities $ 82,326 $ — $ (3,889 ) $ 78,437 U.S. Government agency debt securities 2,862 — (49 ) 2,813 $ 85,188 $ — $ (3,938 ) $ 81,250 Contractual maturities of securities at September 30, 2019 are as follows: Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Within 1 year $ 25,703 $ 25,759 $ — $ — After 1 year through 5 years 196,322 198,199 — — After 5 years through 10 years 228,157 234,815 — — After 10 years 996,219 1,002,472 77,611 78,670 No contractual maturities 24,270 23,957 — — $ 1,470,671 $ 1,485,202 $ 77,611 $ 78,670

Loans

Loans	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loans	Loans The loan portfolio consists of the following loan classes: (in thousands) September 30, December 31, Real estate loans Commercial real estate Nonowner occupied $ 1,933,662 $ 1,809,356 Multi-family residential 942,851 909,439 Land development and construction loans 268,312 326,644 3,144,825 3,045,439 Single-family residential 527,468 533,481 Owner occupied 825,601 777,022 4,497,894 4,355,942 Commercial loans 1,127,484 1,380,428 Loans to financial institutions and acceptances 24,815 68,965 Consumer loans and overdrafts 101,598 114,840 $ 5,751,791 $ 5,920,175 The amounts above include loans under syndication facilities of approximately $578 million and $807 million at September 30, 2019 and December 31, 2018 , respectively, which include Shared National Credit facilities and agreements to enter into credit agreements with other lenders (club deals), and other agreements. The following tables summarize international loans by country, net of loans fully collateralized with cash of approximately $19.6 million and $19.5 million at September 30, 2019 and December 31, 2018 , respectively. September 30, 2019 (in thousands) Venezuela Others (1) Total Real estate loans Single-family residential (2) $ 110,142 $ 7,218 $ 117,360 Commercial loans — 55,264 55,264 Loans to financial institutions and acceptances — 5,000 5,000 Consumer loans and overdrafts (3) 16,269 8,011 24,280 $ 126,411 $ 75,493 $ 201,904 __________________ (1) Loans to borrowers in 15 other countries which do not individually exceed 1% of total assets. (2) Corresponds to mortgage loans secured by single-family residential properties located in the U.S. (3) Mostly comprised of credit card extensions of credit to customers with deposits with the Bank. In April 2019, we revised our credit card program to further strengthen the Company’s credit quality. We stopped charge privileges to our riskiest cardholders and are requiring repayment of their balances by November 2019. We are closely monitoring the performance of the outstanding balance of our credit cards until it is completely repaid. At the end of October we curtailed charge privileges to the remaining cardholders and require repayment of their balances by January 2020. (4) Overdrafts to customers outside the United States were de minimis at September 30, 2019 and December 31, 2018 . December 31, 2018 (in thousands) Venezuela Others (1) Total Real estate loans Single-family residential (2) $ 128,971 $ 6,467 $ 135,438 Commercial loans — 73,636 73,636 Loans to financial institutions and acceptances — 49,000 49,000 Consumer loans and overdrafts (3) 28,191 13,494 41,685 $ 157,162 $ 142,597 $ 299,759 __________________ (1) Loans to borrowers in 17 other countries which do not individually exceed 1% of total assets. (2) Corresponds to mortgage loans secured by single-family residential properties located in the U.S. (3) Mostly comprised of credit card extensions of credit to customers with deposits with the Bank. Charging privileges for Venezuelan resident card holders are suspended when the cardholders’ average deposits decline below the outstanding credit balance. At the beginning of 2018, the Company changed the monitoring of such balances from quarterly to monthly. The age analysis of the loan portfolio by class, including nonaccrual loans, as of September 30, 2019 and December 31, 2018 are summarized in the following tables: September 30, 2019 Total Loans, Past Due Total Loans in Total Loans (in thousands) Current 30-59 60-89 Greater than Total Past Real estate loans Commercial real estate Nonowner occupied $ 1,933,662 $ 1,933,662 $ — $ — $ — $ — $ 1,936 $ — Multi-family residential 942,851 942,851 — — — — — — Land development and construction loans 268,312 268,312 — — — — — — 3,144,825 3,144,825 — — — — 1,936 — Single-family residential 527,468 521,399 — 2,506 3,563 6,069 9,033 — Owner occupied 825,601 820,430 4,179 510 482 5,171 11,921 — 4,497,894 4,486,654 4,179 3,016 4,045 11,240 22,890 — Commercial loans 1,127,484 1,123,535 622 279 3,048 3,949 9,605 — Loans to financial institutions and acceptances 24,815 24,815 — — — — — — Consumer loans and overdrafts 101,598 99,707 1,040 544 307 1,891 116 213 $ 5,751,791 $ 5,734,711 $ 5,841 $ 3,839 $ 7,400 $ 17,080 $ 32,611 $ 213 December 31, 2018 Total Loans, Past Due Total Loans in Total Loans (in thousands) Current 30-59 60-89 Greater than Total Past Real estate loans Commercial real estate Nonowner occupied $ 1,809,356 $ 1,809,356 $ — $ — $ — $ — $ — $ — Multi-family residential 909,439 909,439 — — — — — — Land development and construction loans 326,644 326,644 — — — — — — 3,045,439 3,045,439 — — — — — — Single-family residential 533,481 519,730 7,910 2,336 3,505 13,751 6,689 419 Owner occupied 777,022 773,876 2,800 160 186 3,146 4,983 — 4,355,942 4,339,045 10,710 2,496 3,691 16,897 11,672 419 Commercial loans 1,380,428 1,378,022 704 1,062 640 2,406 4,772 — Loans to financial institutions and acceptances 68,965 68,965 — — — — — — Consumer loans and overdrafts 114,840 113,227 474 243 896 1,613 35 884 $ 5,920,175 $ 5,899,259 $ 11,888 $ 3,801 $ 5,227 $ 20,916 $ 16,479 $ 1,303 At September 30, 2019 and December 31, 2018 , loans with an outstanding principal balance of $1.7 billion were pledged as collateral to secure advances from the FHLB.

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses The analyses by loan segment of the changes in the allowance for loan losses for the three and nine month periods ended September 30, 2019 and 2018 , and its allocation by impairment methodology and the related investment in loans, net as of September 30, 2019 and 2018 are summarized in the following tables: Three Months Ended September 30, 2019 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 21,900 $ 25,824 $ 60 $ 9,620 $ 57,404 Provision for (reversal of) loan losses 487 (388 ) (2 ) (1,597 ) (1,500 ) Loans charged-off Domestic — (907 ) — (98 ) (1,005 ) International — — — (1,661 ) (1,661 ) Recoveries — 190 — 212 402 Balances at end of the period $ 22,387 $ 24,719 $ 58 $ 6,476 $ 53,640 Nine Months Ended September 30, 2019 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 22,778 $ 30,018 $ 445 $ 8,521 $ 61,762 (Reversal of) provision for loan losses (391 ) (3,065 ) (387 ) 993 (2,850 ) Loans charged-off Domestic — (2,773 ) — (504 ) (3,277 ) International — (61 ) — (2,961 ) (3,022 ) Recoveries — 600 — 427 1,027 Balances at end of the period $ 22,387 $ 24,719 $ 58 $ 6,476 $ 53,640 September 30, 2019 (in thousands) Real Estate Commercial Financial Consumer Total Allowance for loan losses by impairment methodology: Individually evaluated $ 397 $ 1,722 $ — $ 1,185 $ 3,304 Collectively evaluated 21,990 22,997 58 5,291 50,336 $ 22,387 $ 24,719 $ 58 $ 6,476 $ 53,640 Investment in loans, net of unearned income: Individually evaluated $ 1,936 $ 19,234 $ — $ 6,007 $ 27,177 Collectively evaluated 3,137,980 2,036,150 24,815 525,669 5,724,614 $ 3,139,916 $ 2,055,384 $ 24,815 $ 531,676 $ 5,751,791 Three Months Ended September 30, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 28,693 $ 29,784 $ 3,317 $ 8,137 $ 69,931 Provision for (reversal of) loan losses 386 1,016 (482 ) 680 1,600 Loans charged-off Domestic — (526 ) — (66 ) (592 ) International — (1,421 ) — (283 ) (1,704 ) Recoveries — 187 — 49 236 Balances at end of the period $ 29,079 $ 29,040 $ 2,835 $ 8,517 $ 69,471 Nine Months Ended September 30, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 31,290 $ 32,687 $ 4,362 $ 3,661 $ 72,000 (Reversal of) provision for loan losses (2,249 ) (199 ) (1,527 ) 5,725 1,750 Loans charged-off Domestic — (3,263 ) — (183 ) (3,446 ) International — (1,473 ) — (913 ) (2,386 ) Recoveries 38 1,288 — 227 1,553 Balances at end of the period $ 29,079 $ 29,040 $ 2,835 $ 8,517 $ 69,471 September 30, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Allowance for loan losses by impairment methodology: Individually evaluated $ 5,783 $ 969 $ — $ 1,620 $ 8,372 Collectively evaluated 23,296 28,071 2,835 6,897 61,099 $ 29,079 $ 29,040 $ 2,835 $ 8,517 $ 69,471 Investment in loans, net of unearned income: Individually evaluated $ 10,965 $ 11,887 $ — $ 4,538 $ 27,390 Collectively evaluated 2,991,808 2,288,635 311,324 540,122 6,131,889 $ 3,002,773 $ 2,300,522 $ 311,324 $ 544,660 $ 6,159,279 The following is a summary of the recorded investment amount of loan sales by portfolio segment: Three Months Ended September 30, Real Estate Commercial Financial Consumer Total 2019 $ — $ 43,190 $ — $ 2,148 $ 45,338 2018 $ 2,000 $ 31,847 $ — $ 3,272 $ 37,119 Nine Months Ended September 30, Real Estate Commercial Financial Consumer Total 2019 $ 23,475 $ 229,310 $ — $ 6,969 $ 259,754 2018 $ 2,000 $ 47,577 $ — $ 11,279 $ 60,856 The following is a summary of impaired loans as of September 30, 2019 and December 31, 2018 : September 30, 2019 Recorded Investment (in thousands) With a Valuation Allowance Without a Valuation Allowance Total Year Average (1) Total Unpaid Principal Balance Valuation Allowance Real estate loans Commercial real estate Nonowner occupied $ 1,936 $ — $ 1,936 $ 975 $ 1,936 $ 397 Multi-family residential — — — 521 — — Land development and construction — — — — — — 1,936 — 1,936 1,496 1,936 397 Single-family residential 5,764 461 6,225 5,045 6,303 1,233 Owner occupied 5,354 4,396 9,750 7,178 9,735 956 13,054 4,857 17,911 13,719 17,974 2,586 Commercial loans 8,315 848 9,163 7,628 9,311 662 Consumer loans and overdrafts 94 9 103 57 100 56 $ 21,463 $ 5,714 $ 27,177 $ 21,404 $ 27,385 $ 3,304 _______________ (1) Average using trailing four quarter balances. December 31, 2018 Recorded Investment (in thousands) With a Valuation Allowance Without a Valuation Allowance Total Year Average (1) Total Unpaid Principal Balance Valuation Allowance Real estate loans Commercial real estate Nonowner occupied $ — $ — $ — $ 7,935 $ — $ — Multi-family residential — 717 717 724 722 — Land development and construction loans — — — — — — — 717 717 8,659 722 — Single-family residential 3,086 306 3,392 4,046 3,427 1,235 Owner occupied 169 4,427 4,596 5,524 4,601 75 3,255 5,450 8,705 18,229 8,750 1,310 Commercial loans 4,585 148 4,733 7,464 6,009 1,059 Consumer loans and overdrafts 9 11 20 15 17 4 $ 7,849 $ 5,609 $ 13,458 $ 25,708 $ 14,776 $ 2,373 _______________ (1) Average using trailing four quarter balances. The Company recognized interest income on impaired loans of $ 139 thousand and $11 thousand during the three months ended September 30, 2019 and 2018 , respectively, and $170 thousand and $119 thousand during the nine months ended September 30, 2019 and 2018 , respectively. During the nine months ended September 30, 2019 , new troubled debt restructurings (“TDRs”) consisted of one single-family residential loan with a recorded investment of $187 thousand , and a multiple loan relationship with a South Florida customer consisting of CRE, owner occupied and commercial loans totaling $9.5 million as of September 30, 2019 . This $9.5 million TDR restructure consisted of extending repayment terms and adjusting future periodic payments, and the Company determined no additional impairment charges were necessary. Four residential loans, totaling $2.2 million , which are included in this loan relationship, were not modified. The Company believes the specific reserves associated with these loans, which total a $11.7 million impaired loan relationship at September 30, 2019 , are adequate to cover probable losses given current facts and circumstances. The Company will continue to closely monitor the performance of these loans under their modified terms. D uring the nine months ended September 30, 2019 , the Company had no charge-offs against the allowance for loan losses as a result of TDR loans. Since September 30, 2018 , no TDRs subsequently defaulted under the modified terms of the loan agreement. Credit Risk Quality The Company’s investment in loans by credit quality indicators as of September 30, 2019 and December 31, 2018 are summarized in the following tables: September 30, 2019 Credit Risk Rating Nonclassified Classified (in thousands) Pass Special Mention Substandard Doubtful Loss Total Real estate loans Commercial real estate Nonowner occupied $ 1,918,670 $ 13,056 $ 1,936 $ — $ — $ 1,933,662 Multi-family residential 942,851 — — — — 942,851 Land development and construction loans 258,128 10,184 — — — 268,312 3,119,649 23,240 1,936 — — 3,144,825 Single-family residential 518,435 — 9,033 — — 527,468 Owner occupied 804,575 5,719 15,307 — — 825,601 4,442,659 28,959 26,276 — — 4,497,894 Commercial loans 1,110,866 5,077 11,541 — — 1,127,484 Loans to financial institutions and acceptances 24,815 — — — — 24,815 Consumer loans and overdrafts 99,198 — 2,400 — — 101,598 $ 5,677,538 $ 34,036 $ 40,217 $ — $ — $ 5,751,791 December 31, 2018 Credit Risk Rating Nonclassified Classified (in thousands) Pass Special Mention Substandard Doubtful Loss Total Real estate loans Commercial real estate Nonowner occupied $ 1,802,573 $ 6,561 $ 222 $ — $ — $ 1,809,356 Multi-family residential 909,439 — — — — 909,439 Land development and construction loans 326,644 — — — — 326,644 3,038,656 6,561 222 — — 3,045,439 Single-family residential 526,373 — 7,108 — — 533,481 Owner occupied 758,552 9,019 9,451 — — 777,022 4,323,581 15,580 16,781 — — 4,355,942 Commercial loans 1,369,434 3,943 6,462 589 — 1,380,428 Loans to financial institutions and acceptances 68,965 — — — — 68,965 Consumer loans and overdrafts 108,778 — 6,062 — — 114,840 $ 5,870,758 $ 19,523 $ 29,305 $ 589 $ — $ 5,920,175

Time Deposits

Time Deposits	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Time Deposits	Time Deposits Time deposits in denominations of $100,000 or more amounted to approximately $1.4 billion at September 30, 2019 and December 31, 2018 . Time deposits in denominations of $250,000 or more amounted to approximately $739 million and $718 million at September 30, 2019 and December 31, 2018 , respectively. As of September 30, 2019 and December 31, 2018 , brokered time deposits amounted to $566 million and $642 million , respectively.

Advances from the Federal Home

Advances from the Federal Home Loan Bank and Other Borrowings	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Advances from the Federal Home Loan Bank and Other Borrowings	Advances from the Federal Home Loan Bank and Other Borrowings The Company had outstanding advances from the FHLB and other borrowings. These borrowings bear fixed interest rates or variable rates based on 3-month LIBOR as follows: Year of Maturity Interest September 30, 2019 December 31, 2018 (in thousands, except percentages) 2019 1.80% to 3.86% $ 195,000 $ 440,000 2020 1.50% to 2.74% 325,000 306,000 2021 1.93% to 3.08% 240,000 210,000 2022 (1) 1.14% to 2.80% 320,000 120,000 2023 and after 2.95% to 3.23% 90,000 90,000 $ 1,170,000 $ 1,166,000 __________________ (1) As of September 30, 2019 , includes $200 million (fixed interest rate - 1.14% ) in advances from the FHLB that are callable prior to maturity. There were no callable advances from the FHLB as of December 31, 2018 .

Junior Subordinated Debentures

Junior Subordinated Debentures Held by Trust Subsidiaries	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Junior Subordinated Debentures Held by Trust Subsidiaries	Junior Subordinated Debentures Held by Trust Subsidiaries At September 30, 2019 and December 31, 2018 the Company owns all of the common capital securities issued by 6 and 8 statutory trust subsidiaries (“the Trust Subsidiaries”), respectively. These Trust Subsidiaries were first formed by the Company for the purpose of issuing trust preferred securities (“the Trust Preferred Securities”) and investing the proceeds in junior subordinated debentures issued by the Company. The debentures are guaranteed by the Company. The Company records the common capital securities issued by the Trust Subsidiaries in other assets in its consolidated balance sheets using the equity method. The junior subordinated debentures issued to the Trust Subsidiaries, less the common securities of the Trust Subsidiaries, qualify as Tier 1 regulatory capital. The following table provides information of the outstanding Trust Preferred Securities issued by, and the junior subordinated debentures issued to, each of the Trust Subsidiaries as of September 30, 2019 and December 31, 2018 : September 30, 2019 December 31, 2018 (in thousands) Amount of Principal Amount of Principal Year of Annual Rate of Trust Year of Commercebank Capital Trust I $ 26,830 $ 28,068 $ 26,830 $ 28,068 1998 8.90% 2028 Commercebank Statutory Trust II — — 15,000 15,464 2000 10.60% 2030 Commercebank Capital Trust III — — 10,000 10,400 2001 10.18% 2031 Commercebank Capital Trust VI 9,250 9,537 9,250 9,537 2002 3-M LIBOR + 3.35% 2033 Commercebank Capital Trust VII 8,000 8,248 8,000 8,248 2003 3-M LIBOR + 3.25% 2033 Commercebank Capital Trust VIII 5,000 5,155 5,000 5,155 2004 3-M LIBOR + 2.85% 2034 Commercebank Capital Trust IX 25,000 25,774 25,000 25,774 2006 3-M LIBOR + 1.75% 2038 Commercebank Capital Trust X 15,000 15,464 15,000 15,464 2006 3-M LIBOR + 1.78% 2036 $ 89,080 $ 92,246 $ 114,080 $ 118,110 The Company and the Trust Subsidiaries have the option to defer payment of interest on the obligations for up to 10 semi-annual periods. In 2019 and 2018, no payment of interest has been deferred on these obligations. The Trust Preferred Securities are subject to mandatory redemption, in whole or in part, upon the maturity or early redemption of the debentures. Early redemption premiums may be payable. On July 31, 2019 and September 7, 2019, the Company redeemed all $10.0 million of its outstanding 10.18% trust preferred securities issued by its Commercebank Capital Trust III ( “ Capital Trust III ” ) and all $15.0 million of its outstanding 10.60% trust preferred securities issued by its Commercebank Statutory Trust II ( “ Statutory Trust II ” ), respectively. The Capital Trust III and the Statutory Trust II securities were redeemed at the contractual call price of 101.018% and 100.53% , respectively. The Company simultaneously redeemed all $10.4 million and $15.5 million junior subordinated debentures held by its Capital Trust III and Statutory Trust II, respectively, as part of these redemption transactions. These redemptions together reduced total cash and cash equivalents by approximately $23.8 million , financial liabilities by approximately $25.9 million and other assets by approximately $2.4 million . In addition, third quarter 2019 results included a total charge of $0.3 million for the contractual premiums paid to security holders from these redemptions. The redemption of these legacy Tier 1 capital instruments reduced the Company’s Tier 1 equity capital by a net of $23.5 million . The Company’s regulatory capital ratios continue to exceed regulatory minimums to be well-capitalized, upon these redemptions.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments At September 30, 2019 and December 31, 2018 , the fair values of the Company’s derivative instruments were as follows: September 30, 2019 December 31, 2018 (in thousands) Other Assets Other Liabilities Other Assets Other Liabilities Interest rate swaps designated as cash flow hedges $ 90 $ — $ 9,386 $ 283 Interest rate swaps not designated as hedging instruments: Customers 15,456 — 1,420 — Third party broker — 15,456 — 1,420 15,456 15,456 1,420 1,420 Interest rate caps not designated as hedging instruments: Customers — 48 — 685 Third party broker 48 — 685 — 48 48 685 685 $ 15,594 $ 15,504 $ 11,491 $ 2,388 Derivatives Designated as Hedging Instruments At December 31, 2018 , the Company had 16 interest rate swap contracts with total notional amounts of $280 million that were designated as cash flow hedges of floating rate interest payments on the outstanding and expected rollover of variable-rate advances from the FHLB. These hedge relationships were expected to be highly effective in offsetting the effects of changes in interest rates in the cash flows associated with the advances from the FHLB. No hedge ineffectiveness gains or losses were recognized in the nine months ended September 30, 2019 and 2018 . In February and March 2019, the Company terminated these 16 interest rate swaps designated as cash flow hedges. The Company is recognizing the contracts’ cumulative net unrealized gains of $8.9 million in earnings over the remaining original life of the terminated interest rate swaps ranging between four months and seven years . On August 8, 2019, the Company entered into five interest rate swap contracts with notional amounts totaling $64.2 million that were designated as cash flow hedges to manage the exposure of floating rate interest payments on all of the Company’s outstanding variable-rate junior subordinated debentures with principal amounts at September 30, 2019 totaling $64.2 million . These interest rate swap contracts mature in approximately three years . The Company expects these interest rates swaps to be highly effective in offsetting the effects of changes in interest rates on cash flows associated with the Company’s variable-rate junior subordinated debentures. The Company’s interest rate swaps designated as cash flow hedges involve the Company’s payment of fixed-rate amounts in exchange for the Company receiving variable-rate payments over the life of the agreements without exchange of the underlying notional amount. Derivatives Not Designated as Hedging Instruments At September 30, 2019 and December 31, 2018 , the Company had 27 and eight interest rate swap contracts with customers, respectively, with a total notional amount of $304.2 million and $80.4 million , respectively. These instruments involve the payment of fixed-rate amounts in exchange for the Company receiving variable-rate payments over the life of the contract. In addition, at September 30, 2019 and December 31, 2018 , the Company had 27 and eight interest rate swap mirror contracts, respectively, with a third party broker with similar terms. In the third quarter of 2019, we entered into swap participation agreements with other financial institutions to manage the credit risk exposure on certain interest rate swaps with customers. Under these agreements, the Company, as the beneficiary, will receive payments from the counterparty if the borrower defaults on the related interest rate swap contract. As of September 30, 2019, we had two swap participation agreements with an aggregate notional amount of approximately $30.2 million . The notional amount of these agreements is based on the Company’s pro-rata share of the related interest rate swap contracts. As of September 30, 2019, the fair value of swap participation agreements was not significant. At September 30, 2019 and December 31, 2018 , the Company had 15 and 16 interest rate cap contracts with customers with a total notional amount of $292.2 million and $323.7 million , respectively. In addition, at September 30, 2019 and December 31, 2018 , the Company had 15 and 16 interest rate cap mirror contracts, respectively, with various third party brokers with similar terms.

Stock-based Incentive Compensat

Stock-based Incentive Compensation Plan	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock-based Incentive Compensation Plan	Stock-based Incentive Compensation Plan The Company sponsors the 2018 Equity and Incentive Compensation Plan (the “2018 Equity Plan”). See Note 11 to the Company’s audited consolidated financial statements in the Form 10-K for more information on the 2018 Equity Plan and restricted stock awards for the year ended 2018. The 2018 Equity Plan was renamed as of August 8, 2019 to reflect the change of the Company’s name to Amerant Bancorp Inc. on June 5, 2019. On January 22, 2019, the Company granted an additional 1,299 shares of restricted stock to an employee who was not included in the December 21, 2018 restricted stock award. These shares of restricted stock will vest in three approximately equal amounts on each of January 21, 2020, 2021 and 2022. The fair value of the restricted stock granted was based on the market price of the shares of the Company’s Class A common stock at the grant date which was $13.58 per share. During the three and nine month periods ended September 30, 2019 , the Company recorded $1.5 million and $4.4 million , respectively, of compensation expense related to the restricted stock awards granted in December 2018 and January 2019. The total unamortized deferred compensation expense of $5.3 million for all unvested restricted stock outstanding at September 30, 2019 will be recognized over a weighted average period of 1.6 years. On October 7, 2019 the Company granted 2,583 shares of restricted stock to a new employee. These shares of restricted stock will vest in three approximately equal amounts on each October 7, 2020, 2021 and 2022. The fair value of the restricted stock granted was based on the market price of the shares of the Company’s Class A common stock at the grant date which was $19.35 .

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company uses an estimated annual effective tax rate method in computing its interim tax provision. This effective tax rate is based on forecast annual consolidated pre-tax income, permanent tax differences and statutory tax rates. Under this method, the tax effect of certain items that do not meet the definition of ordinary income or expense are computed and recognized as discrete items when they occur. The effective combined federal and state tax rates for the nine months ended September 30, 2019 and 2018 were 21.50% and 25.34% , respectively. Effective tax rates differ from the statutory rates mainly due to the impact of forecast permanent non-taxable interest and other income, and the impact of permanent non-deductible discrete expense items incurred during the period, which primarily include the non-deductible spin-off costs in 2018 and the effect of corporate state taxes for the nine months ended September 30, 2019.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) (“AOCI/AOCL”)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss) (“AOCI/AOCL”)	Accumulated Other Comprehensive Income (Loss) (“AOCI/AOCL”): The components of AOCI/AOCL are summarized as follows using applicable blended average federal and state tax rates for each period: September 30, 2019 December 31, 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Net unrealized holding gains (losses) on securities available for sale $ 14,531 $ (3,552 ) $ 10,979 $ (33,145 ) $ 8,104 $ (25,041 ) Net unrealized holding gains on interest rate swaps designated as cash flow hedges 8,113 (1,984 ) 6,129 9,103 (2,226 ) $ 6,877 Total AOCI (AOCL) $ 22,644 $ (5,536 ) $ 17,108 $ (24,042 ) $ 5,878 $ (18,164 ) The components of other comprehensive income (loss) for the periods presented is summarized as follows: Three Months Ended September 30, 2019 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Net unrealized holding gains (losses) on securities available for sale: Change in fair value arising during the period $ 9,087 $ (2,221 ) $ 6,866 $ (6,537 ) $ 1,599 $ (4,938 ) Reclassification adjustment for net (gains) losses included in net income (906 ) 221 (685 ) 15 (4 ) 11 8,181 (2,000 ) 6,181 (6,522 ) 1,595 (4,927 ) Net unrealized holding gains on interest rate swaps designated as cash flow hedges: Change in fair value arising during the period 90 (22 ) 68 2,437 (597 ) 1,840 Reclassification adjustment for net interest income included in net income (370 ) 90 (280 ) (227 ) 56 (171 ) (280 ) 68 (212 ) 2,210 (541 ) 1,669 Total other comprehensive income (loss) $ 7,901 $ (1,932 ) $ 5,969 $ (4,312 ) $ 1,054 $ (3,258 ) Nine Months Ended September 30, 2019 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Net unrealized holding gains (losses) on securities available for sale: Change in fair value arising during the period $ 49,578 $ (12,121 ) $ 37,457 $ (34,103 ) $ 8,734 $ (25,369 ) Reclassification adjustment for net gains included in net income (1,902 ) 465 (1,437 ) (1 ) — (1 ) 47,676 (11,656 ) 36,020 (34,104 ) 8,734 (25,370 ) Net unrealized holding (losses) gains on interest rate swaps designated as cash flow hedges: Change in fair value arising during the period 75 (18 ) 57 11,045 (2,836 ) 8,209 Reclassification adjustment for net interest income included in net income (1,065 ) 260 (805 ) (20 ) 3 (17 ) (990 ) 242 (748 ) 11,025 (2,833 ) 8,192 Total other comprehensive income (loss) $ 46,686 $ (11,414 ) $ 35,272 $ (23,079 ) $ 5,901 $ (17,178 )

Stockholders_ Equity

Stockholders’ Equity	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Stockholders’ Equity	Stockholders’ Equity a) Class A Common Stock Shares of the Company’s Class A common stock issued and outstanding as of September 30, 2019 and December 31, 2018 were 28,985,996 and 26,851,832 , respectively. IPO Over-allotment Option On January 23, 2019, the underwriters of the Company’s IPO partially exercised their over-allotment option by purchasing 229,019 shares of the Company’s Class A common stock at the public offering price of $13.00 per share. The net proceed to the Company from this transaction was approximately $3.0 million . Private Placements On February 1, 2019 and February 28, 2019, the Company issued and sold 153,846 and 1,750,000 shares of its Class A common stock, respectively, in private placements exempt from registration under Section 4(a)(2) of the Securities Act and Securities and SEC Rule 506 (the “Private Placements”). The net proceed to the Company from the Private Placements totaled approximately $26.7 million . b) Class B Common Stock and Treasury Stock Shares of the Company’s Class B common stock issued as of September 30, 2019 and December 31, 2018 were 17,751,053 . As of September 30, 2019 and December 31, 2018 , there were 14,218,596 shares and 16,330,917 shares, respectively, of Class B common stock outstanding. As of September 30, 2019 and December 31, 2018 , the Company had 3,532,457 shares and 1,420,136 shares, respectively, of Class B common stock held as treasury stock under the cost method. On March 7, 2019, the Company repurchased all of MSF’s 2,112,321 remaining shares of nonvoting Class B common stock at a weighted average price of $13.48 per share with proceeds from the IPO over-allotment exercise and the Private Placements, representing an aggregate purchase price of approximately $28.5 million . The aforementioned 2,112,321 shares of Class B common stock are held in treasury stock under the cost method. Following this repurchase, MSF no longer owns any shares of the Company’s Class A common stock or Class B common stock, and therefore, MSF no longer has any rights to register Company shares for resale. c) Dividends On March 13, 2018, the Company paid a special, one-time, cash dividend of $40.0 million to MSF, or $0.94 per common share.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company and its subsidiaries are parties to various legal actions arising in the ordinary course of business. In the opinion of management, the outcome of these proceedings will not have a significant effect on the Company’s consolidated financial position or results of operations. The Company occupies various premises under noncancelable lease agreements expiring through the year 2046. Actual rental expenses may include deferred rents that are recognized as rent expense on a straight line basis. Rent expense under these leases was approximately $1.3 million and $1.5 million for the three months ended September 30, 2019 and 2018 , respectively, and $4.1 million and $4.5 million for the nine months ended September 30, 2019 and 2018 , respectively. Financial instruments whose contract amount represents off-balance sheet credit risk at September 30, 2019 are generally short-term and are as follows: (in thousands) Approximate Commitments to extend credit $ 821,197 Credit card facilities (1) 145,866 Standby letters of credit 15,825 Commercial letters of credit 5,330 $ 988,218 __________________ (1) In April 2019, we revised our credit card program to further strengthen credit quality. The Company stopped the charging privileges to our smallest and riskiest cardholders and required repayment of their balances by November 2019. Other cardholders’ charging privileges ended in October 2019 and they are required to repay all balances by January 2020. As a result of these actions, the Company no longer carries off-balance sheet credit risk associated with its former credit card program.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Assets and liabilities measured at fair value on a recurring basis are summarized below: September 30, 2019 (in thousands) Quoted Third-Party Internal Total Assets Securities available for sale U.S. government sponsored enterprise debt securities $ — $ 940,260 $ — $ 940,260 Corporate debt securities — 243,149 — 243,149 U.S. government agency debt securities — 226,644 — 226,644 Municipal bonds — 50,198 — 50,198 Mutual funds — 23,957 — 23,957 U.S treasury securities — 994 — 994 — 1,485,202 — 1,485,202 Bank owned life insurance — 210,414 — 210,414 Derivative instruments — 15,594 — 15,594 $ — $ 1,711,210 $ — $ 1,711,210 Liabilities Derivative instruments $ — $ 15,504 $ — $ 15,504 December 31, 2018 (in thousands) Quoted Third-Party Internal Total Assets Securities available for sale U.S. government sponsored enterprise debt securities $ — $ 820,779 $ — $ 820,779 Corporate debt securities — 352,555 — 352,555 U.S. government agency debt securities — 216,985 — 216,985 Municipal bonds — 160,212 — 160,212 Mutual funds — 23,110 — 23,110 Commercial paper — 12,410 — 12,410 — 1,586,051 — 1,586,051 Bank owned life insurance — 206,141 — 206,141 Derivative instruments — 11,491 — 11,491 $ — $ 1,803,683 $ — $ 1,803,683 Liabilities Derivative instruments $ — $ 2,388 $ — $ 2,388 Level 2 Valuation Techniques The valuation of securities and derivative instruments is performed through a monthly pricing process using data provided by generally recognized providers of independent data pricing services (the “Pricing Providers”). These Pricing Providers collect, use and incorporate descriptive market data from various sources, quotes and indicators from leading broker dealers to generate independent and objective valuations. The fair value of bank-owned life insurance policies is based on the cash surrender values of the policies as reported by the insurance companies. The valuation techniques and the inputs used in our consolidated financial statements to measure the fair value of our recurring Level 2 financial instruments consider, among other factors, the following: • Similar securities actively traded which are selected from recent market transactions; • Observable market data which includes spreads in relationship to LIBOR, swap curve, and prepayment speed rates, as applicable; and • The captured spread and prepayment speed are used to obtain the fair value for each related security. On a quarterly basis, the Company evaluates the reasonableness of the monthly pricing process for the valuation of securities and derivative instruments. This evaluation includes challenging the valuation of a random sample of the different types of securities in the investment portfolio as of the end of the quarter selected. This challenge consists of obtaining from the Pricing Providers a document explaining the methodology applied to obtain their fair value assessments for each type of investment included in the sample selection. The Company then analyzes in detail the various inputs used in the fair value calculation, both observable and unobservable (e.g., prepayment speeds, yield curve benchmarks, spreads, delinquency rates). Management believes that the consistent application of this methodology allows the Company to understand and evaluate the categorization of its investment portfolio. The methods described above may produce a fair value calculation that may differ from the net realizable value or may not be reflective of future fair values. Furthermore, while the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of its financial instruments could result in different estimates of fair value at the reporting date. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis The following table presents the major category of assets measured at fair value on a nonrecurring basis at September 30, 2019 : September 30, 2019 (in thousands) Quoted Significant Significant Total Description Loans held for sale $ 1,918 $ — $ — $ — There were no assets or liabilities measured at fair value on a nonrecurring basis at December 31, 2018 . Loans Held for Sale . The Company measures the impairment of loans held for sale based on the amount by which the carrying values of those loans exceed their fair values. The Company primarily uses independent third party quotes to measure any subsequent decline in the value of loans held for sale. As a consequence, the fair value of these loans held for sale are considered a Level 1 valuation. Fair Value of Financial Instruments The fair value of a financial instrument represents the price that would be received from its sale in an orderly transaction between market participants at the measurement date. The best indication of the fair value of a financial instrument is determined based upon quoted market prices. However, in many cases, there are no quoted market prices for the Company’s various financial instruments. As a result, the Company derives the fair value of the financial instruments held at the reporting period-end, in part, using present value or other valuation techniques. Those techniques are significantly affected by management’s assumptions, the estimated amount and timing of future cash flows and estimated discount rates included in present value and other techniques. The use of different assumptions could significantly affect the estimated fair values of the Company’s financial instruments. Accordingly, the net realized values could be materially different from the estimates presented below. The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: • Because of their nature and short-term maturities, the carrying values of the following financial instruments were used as a reasonable estimate of their fair value: cash and cash equivalents, interest earning deposits with banks, variable-rate loans with re-pricing terms shorter than twelve months, demand and savings deposits, short-term time deposits and other borrowings. • The fair value of loans held for sale, securities, bank owned life insurance and derivative instruments, are based on quoted market prices, when available. If quoted market prices are unavailable, fair value is estimated using the pricing process described in Note 17 to the Company’s audited consolidated financial statements in the Form 10-K. • The fair value of commitments and letters of credit is based on the assumption that the Company will be required to perform on all such instruments. The commitment amount approximates estimated fair value. • The fair value of advances from the FHLB, junior subordinated debentures and fixed-rate loans are estimated using a present value technique by discounting the future expected contractual cash flows using the current rates at which similar instruments would be issued with comparable credit ratings and terms at the measurement date. • The fair value of long-term time deposits, including certificates of deposit, is determined using a present value technique by discounting the future expected contractual cash flows using current rates at which similar instruments would be issued at the measurement date. The estimated fair value of financial instruments where fair value differs from carrying value are as follows: September 30, 2019 December 31, 2018 (in thousands) Carrying Estimated Carrying Estimated Financial assets: Loans $ 2,752,224 $ 2,635,286 $ 2,850,015 $ 2,739,721 Financial liabilities: Time deposits 1,713,322 1,729,324 1,745,025 1,740,752 Advances from the FHLB 1,170,000 1,181,775 1,166,000 1,167,213 Junior subordinated debentures 92,246 86,757 118,110 99,450

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table shows the calculation of basic and diluted earnings per share: Three months ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2019 2018 2019 2018 Numerator: Net income available to common stockholders $ 11,931 $ 11,551 $ 37,859 $ 31,403 Denominator: ` Basic weighted average shares outstanding 42,466 42,489 42,562 42,489 Dilutive effect of share-based compensation awards 449 — 319 — Diluted weighted average shares outstanding 42,915 42,489 42,881 42,489 Basic earnings per common share $ 0.28 $ 0.27 $ 0.89 $ 0.74 Diluted earnings per common share $ 0.28 $ 0.27 $ 0.88 $ 0.74 As of September 30, 2019 , potential dilutive instruments consist of 738,138 unvested shares of restricted stock, including 736,839 shares of restricted stock issued in December 2018 in connection with the Company’s IPO and 1,299 additional shares of restricted stock issued in January 2019. As of September 30, 2019 , these 738,138 unvested shares of restricted stock were included in the diluted earnings per share computation because, when the unamortized deferred compensation cost related to these shares was divided by the average market price per share at that date, fewer shares would have been purchased than restricted shares assumed issued. Therefore, at that date, such awards resulted in higher diluted weighted average shares outstanding than basic weighted average shares outstanding, and had a dilutive effect in per share earnings for the nine months ended September 30, 2019. As of September 30, 2018 , the Company had no outstanding dilutive instruments.

Business, Basis of Presentati_2

Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reportable Segments	Reportable Segments Beginning in the second quarter of 2019, the Company is managed using a single segment concept, on a consolidated basis, and management determined to that no separate current or historical reportable segment disclosures are required under generally accepted accounting principles in the United States of America (“U.S. GAAP”).
Estimates	Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates made by management include: (i) the determination of the allowance for loan losses; (ii) the fair values of securities and the value assigned to goodwill during the annual goodwill impairment test; (iii) the cash surrender value of bank owned life insurance; and (iv) the determination of whether the amount of deferred tax assets will more likely than not be realized. Management believes that these estimates are appropriate. Actual results could differ from these estimates.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Issued and Not Yet Adopted Revenue from Contracts with Customers In May 2014, the Financial Accounting Standards Board (“FASB”) issued a common revenue standard for recognizing revenue from contracts with customers. This new standard establishes principles for reporting information about the nature, amount, timing, and uncertainty of revenue and cash flows arising from an entity’s contracts with customers. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The scope of the guidance excludes net interest income and many other revenues from financial assets. Although the Company has not finalized the evaluation, we do not expect the adoption to have a material impact on its consolidated financial position or results of operations. The Company plans to adopt the new guidance during the fourth quarter of 2019. Recognition and Measurement of Financial Instruments In January 2016, the FASB issued changes to the guidance on the recognition and measurement of financial instruments. The changes include, among others, the removal of the available-for-sale category for equity securities and updates to certain disclosure requirements. As of September 30, 2019, the Company classifies $23.7 million as available for sale equity securities. The Company currently expects that its available for sale equity securities consisting of a mutual fund investment that qualify for Community Reinvestment Act (“CRA”) purposes will be reclassified out of the available for sale classification and presented separately on the face of the consolidated balance sheet. At adoption, the Company currently expects that the cumulative unrealized loss of these securities previously recognized in AOCL will be recorded as an adjustment to the opening balance of retained earnings. Any further changes to the fair value of equity securities, other than equity method investments, will be recorded in net income. At September 30, 2019, the cumulative unrealized gross loss on this available for sale equity investment was $0.3 million . The Company plans to adopt the new guidance during the fourth quarter of 2019. New Guidance on Leases In December 2018, the FASB issued amendments to new guidance issued in February 2016 for the recognition and measurement of all leases which has not yet been adopted by the Company. The amendments address certain lessor’s issues associated with: (i) sales taxes and other similar taxes collected from lessees, (ii) certain lessor costs and (iii) recognition of variable payments for contracts with lease and nonlease components. The new guidance on leases issued in February 2016 requires lessees to recognize a right-of-use asset and a lease liability for most leases within the scope of the guidance. There were no significant changes to the guidance for lessors. These amendments, and the related pending new guidance, can be adopted using a modified retrospective transition at the beginning of the earliest comparative period presented, and provides for certain practical expedients. The amendments and related new guidance on leases are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020, for private companies, and for fiscal periods beginning after December 15, 2018, and interim periods within those fiscal years, for public companies. Early adoption is permitted. The Company has completed the process of gathering a complete inventory of leases and migrating identified lease data onto a new system and is in the final stages of testing and evaluation. We currently expect to recognize an asset and a corresponding lease liability for an amount currently expected to be less than 1% of the Company’s total consolidated assets at adoption. The Company plans to adopt the new guidance during the first semester of 2020.
Subsequent Events	Subsequent Events The effects of significant subsequent events, if any, have been recognized or disclosed in these unaudited interim consolidated financial statements.
Fair Value Measurement	The valuation of securities and derivative instruments is performed through a monthly pricing process using data provided by generally recognized providers of independent data pricing services (the “Pricing Providers”). These Pricing Providers collect, use and incorporate descriptive market data from various sources, quotes and indicators from leading broker dealers to generate independent and objective valuations. The fair value of bank-owned life insurance policies is based on the cash surrender values of the policies as reported by the insurance companies. The valuation techniques and the inputs used in our consolidated financial statements to measure the fair value of our recurring Level 2 financial instruments consider, among other factors, the following: • Similar securities actively traded which are selected from recent market transactions; • Observable market data which includes spreads in relationship to LIBOR, swap curve, and prepayment speed rates, as applicable; and • The captured spread and prepayment speed are used to obtain the fair value for each related security. On a quarterly basis, the Company evaluates the reasonableness of the monthly pricing process for the valuation of securities and derivative instruments. This evaluation includes challenging the valuation of a random sample of the different types of securities in the investment portfolio as of the end of the quarter selected. This challenge consists of obtaining from the Pricing Providers a document explaining the methodology applied to obtain their fair value assessments for each type of investment included in the sample selection. The Company then analyzes in detail the various inputs used in the fair value calculation, both observable and unobservable (e.g., prepayment speeds, yield curve benchmarks, spreads, delinquency rates). Management believes that the consistent application of this methodology allows the Company to understand and evaluate the categorization of its investment portfolio. The methods described above may produce a fair value calculation that may differ from the net realizable value or may not be reflective of future fair values. Furthermore, while the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of its financial instruments could result in different estimates of fair value at the reporting date.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The fair value of a financial instrument represents the price that would be received from its sale in an orderly transaction between market participants at the measurement date. The best indication of the fair value of a financial instrument is determined based upon quoted market prices. However, in many cases, there are no quoted market prices for the Company’s various financial instruments. As a result, the Company derives the fair value of the financial instruments held at the reporting period-end, in part, using present value or other valuation techniques. Those techniques are significantly affected by management’s assumptions, the estimated amount and timing of future cash flows and estimated discount rates included in present value and other techniques. The use of different assumptions could significantly affect the estimated fair values of the Company’s financial instruments. Accordingly, the net realized values could be materially different from the estimates presented below. The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: • Because of their nature and short-term maturities, the carrying values of the following financial instruments were used as a reasonable estimate of their fair value: cash and cash equivalents, interest earning deposits with banks, variable-rate loans with re-pricing terms shorter than twelve months, demand and savings deposits, short-term time deposits and other borrowings. • The fair value of loans held for sale, securities, bank owned life insurance and derivative instruments, are based on quoted market prices, when available. If quoted market prices are unavailable, fair value is estimated using the pricing process described in Note 17 to the Company’s audited consolidated financial statements in the Form 10-K. • The fair value of commitments and letters of credit is based on the assumption that the Company will be required to perform on all such instruments. The commitment amount approximates estimated fair value. • The fair value of advances from the FHLB, junior subordinated debentures and fixed-rate loans are estimated using a present value technique by discounting the future expected contractual cash flows using the current rates at which similar instruments would be issued with comparable credit ratings and terms at the measurement date. • The fair value of long-term time deposits, including certificates of deposit, is determined using a present value technique by discounting the future expected contractual cash flows using current rates at which similar instruments would be issued at the measurement date.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Schedule of available for sale securities from amortized cost to fair value	Amortized cost and approximate fair values of securities available for sale are summarized as follows: September 30, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses U.S. government-sponsored enterprise debt securities $ 930,638 $ 12,761 $ (3,139 ) $ 940,260 Corporate debt securities 239,078 4,281 (210 ) 243,149 U.S. government agency debt securities 228,042 1,382 (2,780 ) 226,644 Municipal bonds 47,649 2,549 — 50,198 Mutual funds 24,270 — (313 ) 23,957 U.S. treasury securities 994 — — 994 $ 1,470,671 $ 20,973 $ (6,442 ) $ 1,485,202 December 31, 2018 Amortized Gross Unrealized Estimated (in thousands) Gains Losses U.S. government-sponsored enterprise debt securities $ 840,760 $ 2,197 $ (22,178 ) $ 820,779 Corporate debt securities 357,602 139 (5,186 ) 352,555 U.S. government agency debt securities 221,682 187 (4,884 ) 216,985 Municipal bonds 162,438 390 (2,616 ) 160,212 Mutual funds 24,266 — (1,156 ) 23,110 Commercial paper 12,448 — (38 ) 12,410 $ 1,619,196 $ 2,913 $ (36,058 ) $ 1,586,051
Schedule of available for sale securities with unrealized losses	The Company’s securities available for sale with unrealized losses that are deemed temporary, aggregated by the length of time that individual securities have been in a continuous unrealized loss position, are summarized below: September 30, 2019 Less Than 12 Months 12 Months or More Total (in thousands) Estimated Unrealized Estimated Unrealized Estimated Unrealized U.S. government-sponsored enterprise debt securities $ 130,186 $ (636 ) $ 276,102 $ (2,503 ) $ 406,288 $ (3,139 ) Corporate debt securities 13,967 (101 ) 17,110 (109 ) 31,077 (210 ) Municipal bonds — — — — — — U.S. government agency debt securities 15,718 (46 ) 124,128 (2,734 ) 139,846 (2,780 ) Mutual funds — — 23,707 (313 ) 23,707 (313 ) Commercial paper — — — — — — $ 159,871 $ (783 ) $ 441,047 $ (5,659 ) $ 600,918 $ (6,442 ) December 31, 2018 Less Than 12 Months 12 Months or More Total (in thousands) Estimated Unrealized Estimated Unrealized Estimated Unrealized U.S. government-sponsored enterprise debt securities $ 90,980 $ (2,995 ) $ 608,486 $ (19,183 ) $ 699,466 $ (22,178 ) Corporate debt securities 243,667 (3,800 ) 75,762 (1,386 ) 319,429 (5,186 ) Municipal bonds 63,580 (939 ) 133,886 (3,945 ) 197,466 (4,884 ) U.S. government agency debt securities 1,449 (6 ) 94,331 (2,610 ) 95,780 (2,616 ) Mutual funds — — 22,865 (1,156 ) 22,865 (1,156 ) Commercial paper 12,410 (38 ) — — 12,410 (38 ) $ 412,086 $ (7,778 ) $ 935,330 $ (28,280 ) $ 1,347,416 $ (36,058 )
Schedule of Debt Securities, Held-to-maturity	Amortized cost and approximate fair values of securities held to maturity, are summarized as follows: September 30, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses Securities Held to Maturity - U.S. government-sponsored enterprise debt securities $ 74,861 $ 1,090 $ (124 ) $ 75,827 U.S. Government agency debt securities 2,750 93 — 2,843 $ 77,611 $ 1,183 $ (124 ) $ 78,670 December 31, 2018 Amortized Gross Unrealized Estimated (in thousands) Gains Losses Securities Held to Maturity - U.S. government-sponsored enterprise debt securities $ 82,326 $ — $ (3,889 ) $ 78,437 U.S. Government agency debt securities 2,862 — (49 ) 2,813 $ 85,188 $ — $ (3,938 ) $ 81,250
Schedule of contractual maturities of securities	Contractual maturities of securities at September 30, 2019 are as follows: Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Within 1 year $ 25,703 $ 25,759 $ — $ — After 1 year through 5 years 196,322 198,199 — — After 5 years through 10 years 228,157 234,815 — — After 10 years 996,219 1,002,472 77,611 78,670 No contractual maturities 24,270 23,957 — — $ 1,470,671 $ 1,485,202 $ 77,611 $ 78,670

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Schedule of loan portfolio by classes and countries	The loan portfolio consists of the following loan classes: (in thousands) September 30, December 31, Real estate loans Commercial real estate Nonowner occupied $ 1,933,662 $ 1,809,356 Multi-family residential 942,851 909,439 Land development and construction loans 268,312 326,644 3,144,825 3,045,439 Single-family residential 527,468 533,481 Owner occupied 825,601 777,022 4,497,894 4,355,942 Commercial loans 1,127,484 1,380,428 Loans to financial institutions and acceptances 24,815 68,965 Consumer loans and overdrafts 101,598 114,840 $ 5,751,791 $ 5,920,175 The following tables summarize international loans by country, net of loans fully collateralized with cash of approximately $19.6 million and $19.5 million at September 30, 2019 and December 31, 2018 , respectively. September 30, 2019 (in thousands) Venezuela Others (1) Total Real estate loans Single-family residential (2) $ 110,142 $ 7,218 $ 117,360 Commercial loans — 55,264 55,264 Loans to financial institutions and acceptances — 5,000 5,000 Consumer loans and overdrafts (3) 16,269 8,011 24,280 $ 126,411 $ 75,493 $ 201,904 __________________ (1) Loans to borrowers in 15 other countries which do not individually exceed 1% of total assets. (2) Corresponds to mortgage loans secured by single-family residential properties located in the U.S. (3) Mostly comprised of credit card extensions of credit to customers with deposits with the Bank. In April 2019, we revised our credit card program to further strengthen the Company’s credit quality. We stopped charge privileges to our riskiest cardholders and are requiring repayment of their balances by November 2019. We are closely monitoring the performance of the outstanding balance of our credit cards until it is completely repaid. At the end of October we curtailed charge privileges to the remaining cardholders and require repayment of their balances by January 2020. (4) Overdrafts to customers outside the United States were de minimis at September 30, 2019 and December 31, 2018 . December 31, 2018 (in thousands) Venezuela Others (1) Total Real estate loans Single-family residential (2) $ 128,971 $ 6,467 $ 135,438 Commercial loans — 73,636 73,636 Loans to financial institutions and acceptances — 49,000 49,000 Consumer loans and overdrafts (3) 28,191 13,494 41,685 $ 157,162 $ 142,597 $ 299,759 __________________ (1) Loans to borrowers in 17 other countries which do not individually exceed 1% of total assets. (2) Corresponds to mortgage loans secured by single-family residential properties located in the U.S. (3) Mostly comprised of credit card extensions of credit to customers with deposits with the Bank. Charging privileges for Venezuelan resident card holders are suspended when the cardholders’ average deposits decline below the outstanding credit balance. At the beginning of 2018, the Company changed the monitoring of such balances from quarterly to monthly.
Schedule of loan portfolio delinquencies	The age analysis of the loan portfolio by class, including nonaccrual loans, as of September 30, 2019 and December 31, 2018 are summarized in the following tables: September 30, 2019 Total Loans, Past Due Total Loans in Total Loans (in thousands) Current 30-59 60-89 Greater than Total Past Real estate loans Commercial real estate Nonowner occupied $ 1,933,662 $ 1,933,662 $ — $ — $ — $ — $ 1,936 $ — Multi-family residential 942,851 942,851 — — — — — — Land development and construction loans 268,312 268,312 — — — — — — 3,144,825 3,144,825 — — — — 1,936 — Single-family residential 527,468 521,399 — 2,506 3,563 6,069 9,033 — Owner occupied 825,601 820,430 4,179 510 482 5,171 11,921 — 4,497,894 4,486,654 4,179 3,016 4,045 11,240 22,890 — Commercial loans 1,127,484 1,123,535 622 279 3,048 3,949 9,605 — Loans to financial institutions and acceptances 24,815 24,815 — — — — — — Consumer loans and overdrafts 101,598 99,707 1,040 544 307 1,891 116 213 $ 5,751,791 $ 5,734,711 $ 5,841 $ 3,839 $ 7,400 $ 17,080 $ 32,611 $ 213 December 31, 2018 Total Loans, Past Due Total Loans in Total Loans (in thousands) Current 30-59 60-89 Greater than Total Past Real estate loans Commercial real estate Nonowner occupied $ 1,809,356 $ 1,809,356 $ — $ — $ — $ — $ — $ — Multi-family residential 909,439 909,439 — — — — — — Land development and construction loans 326,644 326,644 — — — — — — 3,045,439 3,045,439 — — — — — — Single-family residential 533,481 519,730 7,910 2,336 3,505 13,751 6,689 419 Owner occupied 777,022 773,876 2,800 160 186 3,146 4,983 — 4,355,942 4,339,045 10,710 2,496 3,691 16,897 11,672 419 Commercial loans 1,380,428 1,378,022 704 1,062 640 2,406 4,772 — Loans to financial institutions and acceptances 68,965 68,965 — — — — — — Consumer loans and overdrafts 114,840 113,227 474 243 896 1,613 35 884 $ 5,920,175 $ 5,899,259 $ 11,888 $ 3,801 $ 5,227 $ 20,916 $ 16,479 $ 1,303

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Schedule of allowance for loan losses	The analyses by loan segment of the changes in the allowance for loan losses for the three and nine month periods ended September 30, 2019 and 2018 , and its allocation by impairment methodology and the related investment in loans, net as of September 30, 2019 and 2018 are summarized in the following tables: Three Months Ended September 30, 2019 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 21,900 $ 25,824 $ 60 $ 9,620 $ 57,404 Provision for (reversal of) loan losses 487 (388 ) (2 ) (1,597 ) (1,500 ) Loans charged-off Domestic — (907 ) — (98 ) (1,005 ) International — — — (1,661 ) (1,661 ) Recoveries — 190 — 212 402 Balances at end of the period $ 22,387 $ 24,719 $ 58 $ 6,476 $ 53,640 Nine Months Ended September 30, 2019 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 22,778 $ 30,018 $ 445 $ 8,521 $ 61,762 (Reversal of) provision for loan losses (391 ) (3,065 ) (387 ) 993 (2,850 ) Loans charged-off Domestic — (2,773 ) — (504 ) (3,277 ) International — (61 ) — (2,961 ) (3,022 ) Recoveries — 600 — 427 1,027 Balances at end of the period $ 22,387 $ 24,719 $ 58 $ 6,476 $ 53,640 September 30, 2019 (in thousands) Real Estate Commercial Financial Consumer Total Allowance for loan losses by impairment methodology: Individually evaluated $ 397 $ 1,722 $ — $ 1,185 $ 3,304 Collectively evaluated 21,990 22,997 58 5,291 50,336 $ 22,387 $ 24,719 $ 58 $ 6,476 $ 53,640 Investment in loans, net of unearned income: Individually evaluated $ 1,936 $ 19,234 $ — $ 6,007 $ 27,177 Collectively evaluated 3,137,980 2,036,150 24,815 525,669 5,724,614 $ 3,139,916 $ 2,055,384 $ 24,815 $ 531,676 $ 5,751,791 Three Months Ended September 30, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 28,693 $ 29,784 $ 3,317 $ 8,137 $ 69,931 Provision for (reversal of) loan losses 386 1,016 (482 ) 680 1,600 Loans charged-off Domestic — (526 ) — (66 ) (592 ) International — (1,421 ) — (283 ) (1,704 ) Recoveries — 187 — 49 236 Balances at end of the period $ 29,079 $ 29,040 $ 2,835 $ 8,517 $ 69,471 Nine Months Ended September 30, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 31,290 $ 32,687 $ 4,362 $ 3,661 $ 72,000 (Reversal of) provision for loan losses (2,249 ) (199 ) (1,527 ) 5,725 1,750 Loans charged-off Domestic — (3,263 ) — (183 ) (3,446 ) International — (1,473 ) — (913 ) (2,386 ) Recoveries 38 1,288 — 227 1,553 Balances at end of the period $ 29,079 $ 29,040 $ 2,835 $ 8,517 $ 69,471 September 30, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Allowance for loan losses by impairment methodology: Individually evaluated $ 5,783 $ 969 $ — $ 1,620 $ 8,372 Collectively evaluated 23,296 28,071 2,835 6,897 61,099 $ 29,079 $ 29,040 $ 2,835 $ 8,517 $ 69,471 Investment in loans, net of unearned income: Individually evaluated $ 10,965 $ 11,887 $ — $ 4,538 $ 27,390 Collectively evaluated 2,991,808 2,288,635 311,324 540,122 6,131,889 $ 3,002,773 $ 2,300,522 $ 311,324 $ 544,660 $ 6,159,279 The following is a summary of the recorded investment amount of loan sales by portfolio segment: Three Months Ended September 30, Real Estate Commercial Financial Consumer Total 2019 $ — $ 43,190 $ — $ 2,148 $ 45,338 2018 $ 2,000 $ 31,847 $ — $ 3,272 $ 37,119 Nine Months Ended September 30, Real Estate Commercial Financial Consumer Total 2019 $ 23,475 $ 229,310 $ — $ 6,969 $ 259,754 2018 $ 2,000 $ 47,577 $ — $ 11,279 $ 60,856
Schedule of impaired loans	The following is a summary of impaired loans as of September 30, 2019 and December 31, 2018 : September 30, 2019 Recorded Investment (in thousands) With a Valuation Allowance Without a Valuation Allowance Total Year Average (1) Total Unpaid Principal Balance Valuation Allowance Real estate loans Commercial real estate Nonowner occupied $ 1,936 $ — $ 1,936 $ 975 $ 1,936 $ 397 Multi-family residential — — — 521 — — Land development and construction — — — — — — 1,936 — 1,936 1,496 1,936 397 Single-family residential 5,764 461 6,225 5,045 6,303 1,233 Owner occupied 5,354 4,396 9,750 7,178 9,735 956 13,054 4,857 17,911 13,719 17,974 2,586 Commercial loans 8,315 848 9,163 7,628 9,311 662 Consumer loans and overdrafts 94 9 103 57 100 56 $ 21,463 $ 5,714 $ 27,177 $ 21,404 $ 27,385 $ 3,304 _______________ (1) Average using trailing four quarter balances. December 31, 2018 Recorded Investment (in thousands) With a Valuation Allowance Without a Valuation Allowance Total Year Average (1) Total Unpaid Principal Balance Valuation Allowance Real estate loans Commercial real estate Nonowner occupied $ — $ — $ — $ 7,935 $ — $ — Multi-family residential — 717 717 724 722 — Land development and construction loans — — — — — — — 717 717 8,659 722 — Single-family residential 3,086 306 3,392 4,046 3,427 1,235 Owner occupied 169 4,427 4,596 5,524 4,601 75 3,255 5,450 8,705 18,229 8,750 1,310 Commercial loans 4,585 148 4,733 7,464 6,009 1,059 Consumer loans and overdrafts 9 11 20 15 17 4 $ 7,849 $ 5,609 $ 13,458 $ 25,708 $ 14,776 $ 2,373 _______________ (1) Average using trailing four quarter balances.
Schedule of credit quality indicators	The Company’s investment in loans by credit quality indicators as of September 30, 2019 and December 31, 2018 are summarized in the following tables: September 30, 2019 Credit Risk Rating Nonclassified Classified (in thousands) Pass Special Mention Substandard Doubtful Loss Total Real estate loans Commercial real estate Nonowner occupied $ 1,918,670 $ 13,056 $ 1,936 $ — $ — $ 1,933,662 Multi-family residential 942,851 — — — — 942,851 Land development and construction loans 258,128 10,184 — — — 268,312 3,119,649 23,240 1,936 — — 3,144,825 Single-family residential 518,435 — 9,033 — — 527,468 Owner occupied 804,575 5,719 15,307 — — 825,601 4,442,659 28,959 26,276 — — 4,497,894 Commercial loans 1,110,866 5,077 11,541 — — 1,127,484 Loans to financial institutions and acceptances 24,815 — — — — 24,815 Consumer loans and overdrafts 99,198 — 2,400 — — 101,598 $ 5,677,538 $ 34,036 $ 40,217 $ — $ — $ 5,751,791 December 31, 2018 Credit Risk Rating Nonclassified Classified (in thousands) Pass Special Mention Substandard Doubtful Loss Total Real estate loans Commercial real estate Nonowner occupied $ 1,802,573 $ 6,561 $ 222 $ — $ — $ 1,809,356 Multi-family residential 909,439 — — — — 909,439 Land development and construction loans 326,644 — — — — 326,644 3,038,656 6,561 222 — — 3,045,439 Single-family residential 526,373 — 7,108 — — 533,481 Owner occupied 758,552 9,019 9,451 — — 777,022 4,323,581 15,580 16,781 — — 4,355,942 Commercial loans 1,369,434 3,943 6,462 589 — 1,380,428 Loans to financial institutions and acceptances 68,965 — — — — 68,965 Consumer loans and overdrafts 108,778 — 6,062 — — 114,840 $ 5,870,758 $ 19,523 $ 29,305 $ 589 $ — $ 5,920,175

Advances from the Federal Hom_2

Advances from the Federal Home Loan Bank and Other Borrowings (Tables)	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Schedule of outstanding advances from the FHLB	The Company had outstanding advances from the FHLB and other borrowings. These borrowings bear fixed interest rates or variable rates based on 3-month LIBOR as follows: Year of Maturity Interest September 30, 2019 December 31, 2018 (in thousands, except percentages) 2019 1.80% to 3.86% $ 195,000 $ 440,000 2020 1.50% to 2.74% 325,000 306,000 2021 1.93% to 3.08% 240,000 210,000 2022 (1) 1.14% to 2.80% 320,000 120,000 2023 and after 2.95% to 3.23% 90,000 90,000 $ 1,170,000 $ 1,166,000 __________________ (1) As of September 30, 2019 , includes $200 million (fixed interest rate - 1.14% ) in advances from the FHLB that are callable prior to maturity. There were no callable advances from the FHLB as of December 31, 2018 .

Junior Subordinated Debenture_2

Junior Subordinated Debentures Held by Trust Subsidiaries (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Summary of the Outstanding Trust Preferred Securities	The following table provides information of the outstanding Trust Preferred Securities issued by, and the junior subordinated debentures issued to, each of the Trust Subsidiaries as of September 30, 2019 and December 31, 2018 : September 30, 2019 December 31, 2018 (in thousands) Amount of Principal Amount of Principal Year of Annual Rate of Trust Year of Commercebank Capital Trust I $ 26,830 $ 28,068 $ 26,830 $ 28,068 1998 8.90% 2028 Commercebank Statutory Trust II — — 15,000 15,464 2000 10.60% 2030 Commercebank Capital Trust III — — 10,000 10,400 2001 10.18% 2031 Commercebank Capital Trust VI 9,250 9,537 9,250 9,537 2002 3-M LIBOR + 3.35% 2033 Commercebank Capital Trust VII 8,000 8,248 8,000 8,248 2003 3-M LIBOR + 3.25% 2033 Commercebank Capital Trust VIII 5,000 5,155 5,000 5,155 2004 3-M LIBOR + 2.85% 2034 Commercebank Capital Trust IX 25,000 25,774 25,000 25,774 2006 3-M LIBOR + 1.75% 2038 Commercebank Capital Trust X 15,000 15,464 15,000 15,464 2006 3-M LIBOR + 1.78% 2036 $ 89,080 $ 92,246 $ 114,080 $ 118,110

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	At September 30, 2019 and December 31, 2018 , the fair values of the Company’s derivative instruments were as follows: September 30, 2019 December 31, 2018 (in thousands) Other Assets Other Liabilities Other Assets Other Liabilities Interest rate swaps designated as cash flow hedges $ 90 $ — $ 9,386 $ 283 Interest rate swaps not designated as hedging instruments: Customers 15,456 — 1,420 — Third party broker — 15,456 — 1,420 15,456 15,456 1,420 1,420 Interest rate caps not designated as hedging instruments: Customers — 48 — 685 Third party broker 48 — 685 — 48 48 685 685 $ 15,594 $ 15,504 $ 11,491 $ 2,388

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (“AOCI/AOCL”) (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Components of AOCL	The components of AOCI/AOCL are summarized as follows using applicable blended average federal and state tax rates for each period: September 30, 2019 December 31, 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Net unrealized holding gains (losses) on securities available for sale $ 14,531 $ (3,552 ) $ 10,979 $ (33,145 ) $ 8,104 $ (25,041 ) Net unrealized holding gains on interest rate swaps designated as cash flow hedges 8,113 (1,984 ) 6,129 9,103 (2,226 ) $ 6,877 Total AOCI (AOCL) $ 22,644 $ (5,536 ) $ 17,108 $ (24,042 ) $ 5,878 $ (18,164 )
Components of Other Comprehensive Loss	September 30, 2019 December 31, 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Net unrealized holding gains (losses) on securities available for sale $ 14,531 $ (3,552 ) $ 10,979 $ (33,145 ) $ 8,104 $ (25,041 ) Net unrealized holding gains on interest rate swaps designated as cash flow hedges 8,113 (1,984 ) 6,129 9,103 (2,226 ) $ 6,877 Total AOCI (AOCL) $ 22,644 $ (5,536 ) $ 17,108 $ (24,042 ) $ 5,878 $ (18,164 ) The components of other comprehensive income (loss) for the periods presented is summarized as follows: Three Months Ended September 30, 2019 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Net unrealized holding gains (losses) on securities available for sale: Change in fair value arising during the period $ 9,087 $ (2,221 ) $ 6,866 $ (6,537 ) $ 1,599 $ (4,938 ) Reclassification adjustment for net (gains) losses included in net income (906 ) 221 (685 ) 15 (4 ) 11 8,181 (2,000 ) 6,181 (6,522 ) 1,595 (4,927 ) Net unrealized holding gains on interest rate swaps designated as cash flow hedges: Change in fair value arising during the period 90 (22 ) 68 2,437 (597 ) 1,840 Reclassification adjustment for net interest income included in net income (370 ) 90 (280 ) (227 ) 56 (171 ) (280 ) 68 (212 ) 2,210 (541 ) 1,669 Total other comprehensive income (loss) $ 7,901 $ (1,932 ) $ 5,969 $ (4,312 ) $ 1,054 $ (3,258 )

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Summary of Financial Instruments Whose Contract Amount Represents Off-Balance Sheet Credit Risk	Financial instruments whose contract amount represents off-balance sheet credit risk at September 30, 2019 are generally short-term and are as follows: (in thousands) Approximate Commitments to extend credit $ 821,197 Credit card facilities (1) 145,866 Standby letters of credit 15,825 Commercial letters of credit 5,330 $ 988,218 __________________ (1) In April 2019, we revised our credit card program to further strengthen credit quality. The Company stopped the charging privileges to our smallest and riskiest cardholders and required repayment of their balances by November 2019. Other cardholders’ charging privileges ended in October 2019 and they are required to repay all balances by January 2020. As a result of these actions, the Company no longer carries off-balance sheet credit risk associated with its former credit card program.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below: September 30, 2019 (in thousands) Quoted Third-Party Internal Total Assets Securities available for sale U.S. government sponsored enterprise debt securities $ — $ 940,260 $ — $ 940,260 Corporate debt securities — 243,149 — 243,149 U.S. government agency debt securities — 226,644 — 226,644 Municipal bonds — 50,198 — 50,198 Mutual funds — 23,957 — 23,957 U.S treasury securities — 994 — 994 — 1,485,202 — 1,485,202 Bank owned life insurance — 210,414 — 210,414 Derivative instruments — 15,594 — 15,594 $ — $ 1,711,210 $ — $ 1,711,210 Liabilities Derivative instruments $ — $ 15,504 $ — $ 15,504 December 31, 2018 (in thousands) Quoted Third-Party Internal Total Assets Securities available for sale U.S. government sponsored enterprise debt securities $ — $ 820,779 $ — $ 820,779 Corporate debt securities — 352,555 — 352,555 U.S. government agency debt securities — 216,985 — 216,985 Municipal bonds — 160,212 — 160,212 Mutual funds — 23,110 — 23,110 Commercial paper — 12,410 — 12,410 — 1,586,051 — 1,586,051 Bank owned life insurance — 206,141 — 206,141 Derivative instruments — 11,491 — 11,491 $ — $ 1,803,683 $ — $ 1,803,683 Liabilities Derivative instruments $ — $ 2,388 $ — $ 2,388
Summary of Major Categories of Assets Measured at Fair Value on a Nonrecurring Basis	The following table presents the major category of assets measured at fair value on a nonrecurring basis at September 30, 2019 : September 30, 2019 (in thousands) Quoted Significant Significant Total Description Loans held for sale $ 1,918 $ — $ — $ —
Summary of Estimated Fair Value of Financial Instruments Where Fair Value Differs from Carrying Value	The estimated fair value of financial instruments where fair value differs from carrying value are as follows: September 30, 2019 December 31, 2018 (in thousands) Carrying Estimated Carrying Estimated Financial assets: Loans $ 2,752,224 $ 2,635,286 $ 2,850,015 $ 2,739,721 Financial liabilities: Time deposits 1,713,322 1,729,324 1,745,025 1,740,752 Advances from the FHLB 1,170,000 1,181,775 1,166,000 1,167,213 Junior subordinated debentures 92,246 86,757 118,110 99,450

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	The following table shows the calculation of basic and diluted earnings per share: Three months ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2019 2018 2019 2018 Numerator: Net income available to common stockholders $ 11,931 $ 11,551 $ 37,859 $ 31,403 Denominator: ` Basic weighted average shares outstanding 42,466 42,489 42,562 42,489 Dilutive effect of share-based compensation awards 449 — 319 — Diluted weighted average shares outstanding 42,915 42,489 42,881 42,489 Basic earnings per common share $ 0.28 $ 0.27 $ 0.89 $ 0.74 Diluted earnings per common share $ 0.28 $ 0.27 $ 0.88 $ 0.74

Business, Basis of Presentati_3

Business, Basis of Presentation and Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Millions	6 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)segment$ / sharesshares	Sep. 30, 2019USD ($)subsidiary$ / shares	Dec. 31, 2018$ / shares
Class of Stock [Line Items]
Number of subsidiaries | subsidiary		2
Number of reportable segments | segment	1,000
Available for sale equity securities | $	$ 23.7	$ 23.7
Cumulative unrealized gross loss on this available for sale equity investment | $	$ 0.3	$ 0.3
Maximum | Plan
Class of Stock [Line Items]
Right-of-use asset, percent	1.00%	1.00%
Operating lease liability, percent	1.00%	1.00%
Class A common stock
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.10	$ 0.10	$ 0.10
Class B common stock
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.10	$ 0.10	$ 0.10
Stock repurchased (in shares) | shares	0
Amerant Bank, N.A
Class of Stock [Line Items]
Ownership percentage of subsidiary	100.00%	100.00%

Securities - Amortized Cost to

Securities - Amortized Cost to Fair Value of Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,470,671	$ 1,619,196
Gross Unrealized Gains	20,973	2,913
Gross Unrealized Losses	(6,442)	(36,058)
Estimated Fair Value	1,485,202	1,586,051
U.S. government-sponsored enterprise debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	930,638	840,760
Gross Unrealized Gains	12,761	2,197
Gross Unrealized Losses	(3,139)	(22,178)
Estimated Fair Value	940,260	820,779
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	239,078	357,602
Gross Unrealized Gains	4,281	139
Gross Unrealized Losses	(210)	(5,186)
Estimated Fair Value	243,149	352,555
U.S. government agency debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	228,042	221,682
Gross Unrealized Gains	1,382	187
Gross Unrealized Losses	(2,780)	(4,884)
Estimated Fair Value	226,644	216,985
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	47,649	162,438
Gross Unrealized Gains	2,549	390
Gross Unrealized Losses	0	(2,616)
Estimated Fair Value	50,198	160,212
Mutual funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,270	24,266
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(313)	(1,156)
Estimated Fair Value	23,957	23,110
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	994
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Estimated Fair Value	$ 994
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		12,448
Gross Unrealized Gains		0
Gross Unrealized Losses		(38)
Estimated Fair Value		$ 12,410

Securities - Narrative (Details

Securities - Narrative (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Available for sale	$ 1,485,202,000	$ 1,586,051,000
Foreign sovereign debt securities
Debt Securities, Available-for-sale [Line Items]
Available for sale	$ 0	$ 0

Securities - Unrealized Loss on

Securities - Unrealized Loss on Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	$ 159,871	$ 412,086
12 Months or More, Estimated Fair Value	441,047	935,330
Total, Estimated Fair Value	600,918	1,347,416
Less Than 12 Months, Unrealized Loss	(783)	(7,778)
12 Months or More, Unrealized Loss	(5,659)	(28,280)
Total, Unrealized Loss	(6,442)	(36,058)
U.S. government-sponsored enterprise debt securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	130,186	90,980
12 Months or More, Estimated Fair Value	276,102	608,486
Total, Estimated Fair Value	406,288	699,466
Less Than 12 Months, Unrealized Loss	(636)	(2,995)
12 Months or More, Unrealized Loss	(2,503)	(19,183)
Total, Unrealized Loss	(3,139)	(22,178)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	13,967	243,667
12 Months or More, Estimated Fair Value	17,110	75,762
Total, Estimated Fair Value	31,077	319,429
Less Than 12 Months, Unrealized Loss	(101)	(3,800)
12 Months or More, Unrealized Loss	(109)	(1,386)
Total, Unrealized Loss	(210)	(5,186)
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	0	63,580
12 Months or More, Estimated Fair Value	0	133,886
Total, Estimated Fair Value	0	197,466
Less Than 12 Months, Unrealized Loss	0	(939)
12 Months or More, Unrealized Loss	0	(3,945)
Total, Unrealized Loss	0	(4,884)
U.S. government agency debt securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	15,718	1,449
12 Months or More, Estimated Fair Value	124,128	94,331
Total, Estimated Fair Value	139,846	95,780
Less Than 12 Months, Unrealized Loss	(46)	(6)
12 Months or More, Unrealized Loss	(2,734)	(2,610)
Total, Unrealized Loss	(2,780)	(2,616)
Mutual funds
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	0	0
12 Months or More, Estimated Fair Value	23,707	22,865
Total, Estimated Fair Value	23,707	22,865
Less Than 12 Months, Unrealized Loss	0	0
12 Months or More, Unrealized Loss	(313)	(1,156)
Total, Unrealized Loss	(313)	(1,156)
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	0	12,410
12 Months or More, Estimated Fair Value	0	0
Total, Estimated Fair Value	0	12,410
Less Than 12 Months, Unrealized Loss	0	(38)
12 Months or More, Unrealized Loss	0	0
Total, Unrealized Loss	$ 0	$ (38)

Securities - Held to Maturity S

Securities - Held to Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 77,611	$ 85,188
Gross Unrealized Gains	1,183	0
Gross Unrealized Losses	(124)	(3,938)
Estimated Fair Value	78,670	81,250
U.S. government-sponsored enterprise debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	74,861	82,326
Gross Unrealized Gains	1,090	0
Gross Unrealized Losses	(124)	(3,889)
Estimated Fair Value	75,827	78,437
U.S. government agency debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	2,750	2,862
Gross Unrealized Gains	93	0
Gross Unrealized Losses	0	(49)
Estimated Fair Value	$ 2,843	$ 2,813

Securities - Contractual Maturi

Securities - Contractual Maturities on Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available for Sale, Amortized Cost
Within 1 year	$ 25,703
After 1 year through 5 years	196,322
After 5 years through 10 years	228,157
After 10 years	996,219
No contractual maturities	24,270
Amortized Cost	1,470,671	$ 1,619,196
Available for Sale, Estimated Fair Value
Within 1 year	25,759
After 1 year through 5 years	198,199
After 5 years through 10 years	234,815
After 10 years	1,002,472
No contractual maturities	23,957
Estimated Fair Value	1,485,202	1,586,051
Held to Maturity, Amortized Cost
Within 1 year	0
After 1 year through 5 years	0
After 5 years through 10 years	0
After 10 years	77,611
No contractual maturities	0
Amortized Cost	77,611	85,188
Held to Maturity, Estimated Fair Value
Within 1 year	0
After 1 year through 5 years	0
After 5 years through 10 years	0
After 10 years	78,670
No contractual maturities	0
Estimated Fair Value	$ 78,670	$ 81,250

Loans - Loan Portfolio by Class

Loans - Loan Portfolio by Classes (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,751,791	$ 5,920,175
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,497,894	4,355,942
Real estate loans | Nonowner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,933,662	1,809,356
Real estate loans | Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	942,851	909,439
Real estate loans | Land development and construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	268,312	326,644
Real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,144,825	3,045,439
Real estate loans | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	527,468	533,481
Real estate loans | Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	825,601	777,022
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,127,484	1,380,428
Loans to financial institutions and acceptances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	24,815	68,965
Consumer loans and overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 101,598	$ 114,840

Loans - Narrative (Details)

Loans - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Syndication facilities included in loans	$ 578	$ 807
Cash collateral on loans	19.6	19.5
Loans pledged as collateral	$ 1,700	$ 1,700

Loans - Loan Portfolio by Count

Loans - Loan Portfolio by Countries (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,751,791	$ 5,920,175
Others | Assets, total | Geographic concentration risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	1.00%	1.00%
International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 201,904	$ 299,759
International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	126,411	157,162
International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	75,493	142,597
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,497,894	4,355,942
Real estate loans | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	117,360	135,438
Real estate loans | International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	110,142	128,971
Real estate loans | International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,218	6,467
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,127,484	1,380,428
Commercial loans | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	55,264	73,636
Commercial loans | International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Commercial loans | International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	55,264	73,636
Loans to financial institutions and acceptances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	24,815	68,965
Loans to financial institutions and acceptances | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,000	49,000
Loans to financial institutions and acceptances | International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Loans to financial institutions and acceptances | International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,000	49,000
Consumer loans and overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	101,598	114,840
Consumer loans and overdrafts | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	24,280	41,685
Consumer loans and overdrafts | International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,269	28,191
Consumer loans and overdrafts | International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 8,011	$ 13,494

Loans - Loans by Delinquency (D

Loans - Loans by Delinquency (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	$ 5,751,791	$ 5,920,175
Current	5,734,711	5,899,259
Past Due	17,080	20,916
Total Loans in Nonaccrual Status	32,611	16,479
Total Loans 90 Days or More Past Due and Accruing	213	1,303
30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	5,841	11,888
60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	3,839	3,801
Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	7,400	5,227
Real estate loans
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	4,497,894	4,355,942
Current	4,486,654	4,339,045
Past Due	11,240	16,897
Total Loans in Nonaccrual Status	22,890	11,672
Total Loans 90 Days or More Past Due and Accruing	0	419
Real estate loans | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	4,179	10,710
Real estate loans | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	3,016	2,496
Real estate loans | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	4,045	3,691
Real estate loans | Nonowner occupied
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	1,933,662	1,809,356
Current	1,933,662	1,809,356
Past Due	0	0
Total Loans in Nonaccrual Status	1,936	0
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Nonowner occupied | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Nonowner occupied | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Nonowner occupied | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Multi-family residential
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	942,851	909,439
Current	942,851	909,439
Past Due	0	0
Total Loans in Nonaccrual Status	0	0
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Multi-family residential | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Multi-family residential | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Multi-family residential | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Land development and construction loans
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	268,312	326,644
Current	268,312	326,644
Past Due	0	0
Total Loans in Nonaccrual Status	0	0
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Land development and construction loans | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Land development and construction loans | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Land development and construction loans | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	3,144,825	3,045,439
Current	3,144,825	3,045,439
Past Due	0	0
Total Loans in Nonaccrual Status	1,936	0
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Commercial real estate | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Commercial real estate | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Commercial real estate | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Real estate loans | Single-family residential
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	527,468	533,481
Current	521,399	519,730
Past Due	6,069	13,751
Total Loans in Nonaccrual Status	9,033	6,689
Total Loans 90 Days or More Past Due and Accruing	0	419
Real estate loans | Single-family residential | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	7,910
Real estate loans | Single-family residential | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	2,506	2,336
Real estate loans | Single-family residential | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	3,563	3,505
Real estate loans | Owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	825,601	777,022
Current	820,430	773,876
Past Due	5,171	3,146
Total Loans in Nonaccrual Status	11,921	4,983
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Owner occupied | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	4,179	2,800
Real estate loans | Owner occupied | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	510	160
Real estate loans | Owner occupied | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	482	186
Commercial loans
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	1,127,484	1,380,428
Current	1,123,535	1,378,022
Past Due	3,949	2,406
Total Loans in Nonaccrual Status	9,605	4,772
Total Loans 90 Days or More Past Due and Accruing	0	0
Commercial loans | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	622	704
Commercial loans | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	279	1,062
Commercial loans | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	3,048	640
Loans to financial institutions and acceptances
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	24,815	68,965
Current	24,815	68,965
Past Due	0	0
Total Loans in Nonaccrual Status	0	0
Total Loans 90 Days or More Past Due and Accruing	0	0
Loans to financial institutions and acceptances | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Loans to financial institutions and acceptances | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Loans to financial institutions and acceptances | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Consumer loans and overdrafts
Financing Receivable, Past Due [Line Items]
Total Loans, Net of Unearned Income	101,598	114,840
Current	99,707	113,227
Past Due	1,891	1,613
Total Loans in Nonaccrual Status	116	35
Total Loans 90 Days or More Past Due and Accruing	213	884
Consumer loans and overdrafts | 30-59 Days
Financing Receivable, Past Due [Line Items]
Past Due	1,040	474
Consumer loans and overdrafts | 60-89 Days
Financing Receivable, Past Due [Line Items]
Past Due	544	243
Consumer loans and overdrafts | Greater than 90 Days
Financing Receivable, Past Due [Line Items]
Past Due	$ 307	$ 896

Allowance for Loan Losses - All

Allowance for Loan Losses - Allowances by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance for Credit Losses
Balances at beginning of the period	$ 57,404	$ 69,931	$ 61,762	$ 72,000
Provision for (reversal of) loan losses	(1,500)	1,600	(2,850)	1,750
Recoveries	402	236	1,027	1,553
Balances at end of the period	53,640	69,471	53,640	69,471
Allowance for loan losses by impairment methodology, Individually evaluated	3,304	8,372	3,304	8,372
Allowance for loan losses by impairment methodology, Collectively evaluated	50,336	61,099	50,336	61,099
Investment in loans, net of unearned income, Individually evaluated	27,177	27,390	27,177	27,390
Investment in loans, net of unearned income, Collectively evaluated	5,724,614	6,131,889	5,724,614	6,131,889
Total Loans, Net of Unearned Income	5,751,791	6,159,279	5,751,791	6,159,279
Domestic
Allowance for Credit Losses
Loans charged-off	(1,005)	(592)	(3,277)	(3,446)
International
Allowance for Credit Losses
Loans charged-off	(1,661)	(1,704)	(3,022)	(2,386)
Real Estate
Allowance for Credit Losses
Balances at beginning of the period	21,900	28,693	22,778	31,290
Provision for (reversal of) loan losses	487	386	(391)	(2,249)
Recoveries	0	0	0	38
Balances at end of the period	22,387	29,079	22,387	29,079
Allowance for loan losses by impairment methodology, Individually evaluated	397	5,783	397	5,783
Allowance for loan losses by impairment methodology, Collectively evaluated	21,990	23,296	21,990	23,296
Investment in loans, net of unearned income, Individually evaluated	1,936	10,965	1,936	10,965
Investment in loans, net of unearned income, Collectively evaluated	3,137,980	2,991,808	3,137,980	2,991,808
Total Loans, Net of Unearned Income	3,139,916	3,002,773	3,139,916	3,002,773
Real Estate | Domestic
Allowance for Credit Losses
Loans charged-off	0	0	0	0
Real Estate | International
Allowance for Credit Losses
Loans charged-off	0	0	0	0
Commercial
Allowance for Credit Losses
Balances at beginning of the period	25,824	29,784	30,018	32,687
Provision for (reversal of) loan losses	(388)	1,016	(3,065)	(199)
Recoveries	190	187	600	1,288
Balances at end of the period	24,719	29,040	24,719	29,040
Allowance for loan losses by impairment methodology, Individually evaluated	1,722	969	1,722	969
Allowance for loan losses by impairment methodology, Collectively evaluated	22,997	28,071	22,997	28,071
Investment in loans, net of unearned income, Individually evaluated	19,234	11,887	19,234	11,887
Investment in loans, net of unearned income, Collectively evaluated	2,036,150	2,288,635	2,036,150	2,288,635
Total Loans, Net of Unearned Income	2,055,384	2,300,522	2,055,384	2,300,522
Commercial | Domestic
Allowance for Credit Losses
Loans charged-off	(907)	(526)	(2,773)	(3,263)
Commercial | International
Allowance for Credit Losses
Loans charged-off	0	(1,421)	(61)	(1,473)
Financial Institutions
Allowance for Credit Losses
Balances at beginning of the period	60	3,317	445	4,362
Provision for (reversal of) loan losses	(2)	(482)	(387)	(1,527)
Recoveries	0	0	0	0
Balances at end of the period	58	2,835	58	2,835
Allowance for loan losses by impairment methodology, Individually evaluated	0	0	0	0
Allowance for loan losses by impairment methodology, Collectively evaluated	58	2,835	58	2,835
Investment in loans, net of unearned income, Individually evaluated	0	0	0	0
Investment in loans, net of unearned income, Collectively evaluated	24,815	311,324	24,815	311,324
Total Loans, Net of Unearned Income	24,815	311,324	24,815	311,324
Financial Institutions | Domestic
Allowance for Credit Losses
Loans charged-off	0	0	0	0
Financial Institutions | International
Allowance for Credit Losses
Loans charged-off	0	0	0	0
Consumer and others
Allowance for Credit Losses
Balances at beginning of the period	9,620	8,137	8,521	3,661
Provision for (reversal of) loan losses	(1,597)	680	993	5,725
Recoveries	212	49	427	227
Balances at end of the period	6,476	8,517	6,476	8,517
Allowance for loan losses by impairment methodology, Individually evaluated	1,185	1,620	1,185	1,620
Allowance for loan losses by impairment methodology, Collectively evaluated	5,291	6,897	5,291	6,897
Investment in loans, net of unearned income, Individually evaluated	6,007	4,538	6,007	4,538
Investment in loans, net of unearned income, Collectively evaluated	525,669	540,122	525,669	540,122
Total Loans, Net of Unearned Income	531,676	544,660	531,676	544,660
Consumer and others | Domestic
Allowance for Credit Losses
Loans charged-off	(98)	(66)	(504)	(183)
Consumer and others | International
Allowance for Credit Losses
Loans charged-off	$ (1,661)	$ (283)	$ (2,961)	$ (913)

Allowance for Loan Losses - Rec

Allowance for Loan Losses - Recorded Investment of Loan Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financing Receivable, Impaired [Line Items]
Amount of loan sales	$ 45,338	$ 37,119	$ 259,754	$ 60,856
Real Estate
Financing Receivable, Impaired [Line Items]
Amount of loan sales	0	2,000	23,475	2,000
Commercial
Financing Receivable, Impaired [Line Items]
Amount of loan sales	43,190	31,847	229,310	47,577
Financial Institutions
Financing Receivable, Impaired [Line Items]
Amount of loan sales	0	0	0	0
Consumer and others
Financing Receivable, Impaired [Line Items]
Amount of loan sales	$ 2,148	$ 3,272	$ 6,969	$ 11,279

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	$ 21,463	$ 7,849
Recorded Investment, Without a Valuation Allowance	5,714	5,609
Recorded Investment, Total	27,177	13,458
Year Average	21,404	25,708
Total Unpaid Principal Balance	27,385	14,776
Valuation Allowance	3,304	2,373
Real estate loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	13,054	3,255
Recorded Investment, Without a Valuation Allowance	4,857	5,450
Recorded Investment, Total	17,911	8,705
Year Average	13,719	18,229
Total Unpaid Principal Balance	17,974	8,750
Valuation Allowance	2,586	1,310
Real estate loans | Nonowner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	1,936	0
Recorded Investment, Without a Valuation Allowance	0	0
Recorded Investment, Total	1,936	0
Year Average	975	7,935
Total Unpaid Principal Balance	1,936	0
Valuation Allowance	397	0
Real estate loans | Multi-family residential
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	0	0
Recorded Investment, Without a Valuation Allowance	0	717
Recorded Investment, Total	0	717
Year Average	521	724
Total Unpaid Principal Balance	0	722
Valuation Allowance	0	0
Real estate loans | Land development and construction loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	0	0
Recorded Investment, Without a Valuation Allowance	0	0
Recorded Investment, Total	0	0
Year Average	0	0
Total Unpaid Principal Balance	0	0
Valuation Allowance	0	0
Real estate loans | Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	1,936	0
Recorded Investment, Without a Valuation Allowance	0	717
Recorded Investment, Total	1,936	717
Year Average	1,496	8,659
Total Unpaid Principal Balance	1,936	722
Valuation Allowance	397	0
Real estate loans | Single-family residential
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	5,764	3,086
Recorded Investment, Without a Valuation Allowance	461	306
Recorded Investment, Total	6,225	3,392
Year Average	5,045	4,046
Total Unpaid Principal Balance	6,303	3,427
Valuation Allowance	1,233	1,235
Real estate loans | Owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	5,354	169
Recorded Investment, Without a Valuation Allowance	4,396	4,427
Recorded Investment, Total	9,750	4,596
Year Average	7,178	5,524
Total Unpaid Principal Balance	9,735	4,601
Valuation Allowance	956	75
Commercial loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	8,315	4,585
Recorded Investment, Without a Valuation Allowance	848	148
Recorded Investment, Total	9,163	4,733
Year Average	7,628	7,464
Total Unpaid Principal Balance	9,311	6,009
Valuation Allowance	662	1,059
Consumer loans and overdrafts
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	94	9
Recorded Investment, Without a Valuation Allowance	9	11
Recorded Investment, Total	103	20
Year Average	57	15
Total Unpaid Principal Balance	100	17
Valuation Allowance	$ 56	$ 4

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Financing Receivable, Impaired [Line Items]
Interest income recognized on impaired loans	$ 139,000	$ 11,000	$ 170,000	$ 119,000
Recorded investment	27,177,000		27,177,000		$ 13,458,000
Charge off against Allowance for loan losses			$ 0
TDRs subsequently defaulted | contract			0
Real estate loans
Financing Receivable, Impaired [Line Items]
Recorded investment	9,500,000		$ 9,500,000
Recorded investment	17,911,000		$ 17,911,000		8,705,000
Real estate loans | One single-family residential loan
Financing Receivable, Impaired [Line Items]
Number of contracts | contract			1
Recorded investment	187,000		$ 187,000
Real estate loans | Residential Loans
Financing Receivable, Impaired [Line Items]
Recorded investment	2,200,000		$ 2,200,000
Number of contracts | contract			4
Real estate loans | Owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	9,750,000		$ 9,750,000		$ 4,596,000
Real Estate and Commercial | Owner occupied
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 11,700,000		$ 11,700,000

Allowance for Loan Losses - Cre

Allowance for Loan Losses - Credit Risk Quality (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 5,751,791	$ 5,920,175
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	5,677,538	5,870,758
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	34,036	19,523
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	40,217	29,305
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	589
Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,497,894	4,355,942
Real estate loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,442,659	4,323,581
Real estate loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	28,959	15,580
Real estate loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	26,276	16,781
Real estate loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Nonowner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,933,662	1,809,356
Real estate loans | Nonowner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,918,670	1,802,573
Real estate loans | Nonowner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	13,056	6,561
Real estate loans | Nonowner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,936	222
Real estate loans | Nonowner occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Nonowner occupied | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Multi-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	942,851	909,439
Real estate loans | Multi-family residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	942,851	909,439
Real estate loans | Multi-family residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Multi-family residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Multi-family residential | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Multi-family residential | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Land development and construction loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	268,312	326,644
Real estate loans | Land development and construction loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	258,128	326,644
Real estate loans | Land development and construction loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	10,184	0
Real estate loans | Land development and construction loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Land development and construction loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Land development and construction loans | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,144,825	3,045,439
Real estate loans | Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,119,649	3,038,656
Real estate loans | Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	23,240	6,561
Real estate loans | Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,936	222
Real estate loans | Commercial real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Commercial real estate | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Single-family residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	527,468	533,481
Real estate loans | Single-family residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	518,435	526,373
Real estate loans | Single-family residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Single-family residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	9,033	7,108
Real estate loans | Single-family residential | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Single-family residential | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	825,601	777,022
Real estate loans | Owner occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	804,575	758,552
Real estate loans | Owner occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	5,719	9,019
Real estate loans | Owner occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	15,307	9,451
Real estate loans | Owner occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Real estate loans | Owner occupied | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,127,484	1,380,428
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,110,866	1,369,434
Commercial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	5,077	3,943
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	11,541	6,462
Commercial loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	589
Commercial loans | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Loans to financial institutions and acceptances
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	24,815	68,965
Loans to financial institutions and acceptances | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	24,815	68,965
Loans to financial institutions and acceptances | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Loans to financial institutions and acceptances | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Loans to financial institutions and acceptances | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Loans to financial institutions and acceptances | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Consumer loans and overdrafts
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	101,598	114,840
Consumer loans and overdrafts | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	99,198	108,778
Consumer loans and overdrafts | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Consumer loans and overdrafts | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,400	6,062
Consumer loans and overdrafts | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Consumer loans and overdrafts | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 0	$ 0

Time Deposits (Details)

Time Deposits (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Banking and Thrift [Abstract]
Time deposits, $100,000 or more	$ 1,400	$ 1,400
Time deposits, $250,000 or more	739	718
Brokered time deposits	$ 566	$ 642

Advances from the Federal Hom_3

Advances from the Federal Home Loan Bank and Other Borrowings (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
2019	$ 195,000,000	$ 440,000,000
2020	325,000,000	306,000,000
2021	240,000,000	210,000,000
2022	320,000,000	120,000,000
2023 and after	90,000,000	90,000,000
Advances from Federal Home Loan Banks	1,170,000,000	1,166,000,000
Callable Option
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Advances from Federal Home Loan Banks	$ 200,000,000	$ 0
Advances from Federal Home Loan Banks, Interest Rate	1.14%
3-month LIBOR | Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest Rate 2019	1.80%
Interest Rate 2020	1.50%
Interest Rate 2021	1.93%
Interest Rate 2022	1.14%
Interest Rate 2023 and after	2.95%
3-month LIBOR | Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Interest Rate 2019	3.86%
Interest Rate 2020	2.74%
Interest Rate 2021	3.08%
Interest Rate 2022	2.80%
Interest Rate 2023 and after	3.23%

Junior Subordinated Debenture_3

Junior Subordinated Debentures Held by Trust Subsidiaries - Outstanding Securities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 89,080	$ 114,080
Principal Amount of Debenture Issued to Trust	92,246	118,110
Commercebank Capital Trust I | Junior Subordinated Notes, Maturing 2028 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 28,068	28,068
Annual Rate of Trust Preferred Securities and Debentures	8.90%
Commercebank Statutory Trust II | Junior Subordinated Notes, Maturing 2030 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 0	15,464
Annual Rate of Trust Preferred Securities and Debentures	10.60%
Commercebank Capital Trust III | Junior Subordinated Notes, Maturing 2031 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 0	10,400
Annual Rate of Trust Preferred Securities and Debentures	10.18%
Commercebank Capital Trust VI | Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 9,537	9,537
Commercebank Capital Trust VI | Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	3.35%
Commercebank Capital Trust VII | Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 8,248	8,248
Commercebank Capital Trust VII | Junior Subordinated Notes, Maturing 2033 | Junior Subordinated Debt | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	3.25%
Commercebank Capital Trust VIII | Junior Subordinated Notes, Maturing 2034 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 5,155	5,155
Commercebank Capital Trust VIII | Junior Subordinated Notes, Maturing 2034 | Junior Subordinated Debt | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	2.85%
Commercebank Capital Trust IX | Junior Subordinated Notes, Maturing 2038 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 25,774	25,774
Commercebank Capital Trust IX | Junior Subordinated Notes, Maturing 2038 | Junior Subordinated Debt | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	1.75%
Commercebank Capital Trust X | Junior Subordinated Notes, Maturing 2036 | Junior Subordinated Debt
Debt Instrument [Line Items]
Principal Amount of Debenture Issued to Trust	$ 15,464	15,464
Commercebank Capital Trust X | Junior Subordinated Notes, Maturing 2036 | Junior Subordinated Debt | 3-M LIBOR
Debt Instrument [Line Items]
Annual Rate of Trust Preferred Securities and Debentures	1.78%
Commercebank Capital Trust I | Junior Subordinated Notes, Maturing 2028
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 26,830	26,830
Commercebank Statutory Trust II | Junior Subordinated Notes, Maturing 2030
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	0	15,000
Commercebank Capital Trust III | Junior Subordinated Notes, Maturing 2031
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	0	10,000
Commercebank Capital Trust VI | Junior Subordinated Notes, Maturing 2033
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	9,250	9,250
Commercebank Capital Trust VII | Junior Subordinated Notes, Maturing 2033
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	8,000	8,000
Commercebank Capital Trust VIII | Junior Subordinated Notes, Maturing 2034
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	5,000	5,000
Commercebank Capital Trust IX | Junior Subordinated Notes, Maturing 2038
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	25,000	25,000
Commercebank Capital Trust X | Junior Subordinated Notes, Maturing 2036
Debt Instrument [Line Items]
Amount of Trust Preferred Securities Issued by Trust	$ 15,000	$ 15,000

Junior Subordinated Debenture_4

Junior Subordinated Debentures Held by Trust Subsidiaries - Narrative (Details) $ in Millions	Sep. 07, 2019USD ($)	Jul. 31, 2019USD ($)	Sep. 30, 2019USD ($)entitypayment	Sep. 30, 2019entitypayment	Dec. 31, 2018entity
Debt Instrument [Line Items]
Number of trust subsidiaries | entity			6	6	8
Trust Redemption
Debt Instrument [Line Items]
Decrease in cash and cash equivalents			$ 23.8
Decrease in financing liabilities			25.9
Decrease in other assets			2.4
Premium paid to security holders			0.3
Decrease in Company’s Tier 1 equity capital			$ 23.5
10.18% Trust Preferred Securities
Debt Instrument [Line Items]
Preferred stock, redemption amount		$ 10
Interest rate, stated percentage		10.18%
Contractual call price		101.018%
10.60% Trust Preferred Securities
Debt Instrument [Line Items]
Preferred stock, redemption amount	$ 15
Interest rate, stated percentage	10.60%
Contractual call price	100.53%
Junior Subordinated Debt
Debt Instrument [Line Items]
Period of deferred payments of interest				5 years
Number of interest payments deferred | payment			0	0
Junior Subordinated Debt | Capital Trust III
Debt Instrument [Line Items]
Preferred stock, redemption amount		$ 10.4
Junior Subordinated Debt | Statutory Trust II
Debt Instrument [Line Items]
Preferred stock, redemption amount	$ 15.5

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Derivatives (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	$ 15,594	$ 11,491
Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	15,504	2,388
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	90	9,386
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	0	283
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	15,456	1,420
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	15,456	1,420
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Customers | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	15,456	1,420
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Customers | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	0	0
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Third Party Broker | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	0	0
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Third Party Broker | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	15,456	1,420
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	48	685
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	48	685
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Customers | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	0	0
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Customers | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	48	685
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Third Party Broker | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	48	685
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Third Party Broker | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	$ 0	$ 0

Derivative Instruments - Narrat

Derivative Instruments - Narrative (Details)	Aug. 08, 2019USD ($)instrument	Sep. 30, 2019USD ($)instrument	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)instrument
Derivatives, Fair Value [Line Items]
Hedge ineffectiveness gain (loss)		$ 0	$ 0
Variable-rate junior subordinated debentures		64,200,000
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	5			16
Notional amount	$ 64,200,000			$ 280,000,000
Derivative, gain		$ 8,900,000
Term of contract	3 years
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Minimum
Derivatives, Fair Value [Line Items]
Term of contract		4 months
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Maximum
Derivatives, Fair Value [Line Items]
Term of contract		7 years
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Customers
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument		27		8
Notional amount		$ 304,200,000		$ 80,400,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Third Party Broker
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument		27		8
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Customers
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument		15		16
Notional amount		$ 292,200,000		$ 323,700,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Third Party Broker
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument		15		16
Derivatives Not Designated as Hedging Instruments | Credit Risk Contract
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument		2
Notional amount		$ 30,200,000

Stock-based Incentive Compens_2

Stock-based Incentive Compensation Plan (Details) - Restricted Stock - Class A common stock - USD ($) $ / shares in Units, $ in Millions	Oct. 07, 2019	Jan. 22, 2019	Sep. 30, 2019	Sep. 30, 2019
Defined Contribution Plan Disclosure [Line Items]
Grants in period (in shares)		1,299
Award vesting period		3 years
Grants in period, weighted average grant date fair value (in dollars per share)		$ 13.58
Share-based compensation expense			$ 1.5	$ 4.4
Nonvested awards, compensation not yet recognized			$ 5.3	$ 5.3
Nonvested awards, compensation cost not yet recognized, period				1 year 7 months 6 days
Subsequent Event
Defined Contribution Plan Disclosure [Line Items]
Grants in period (in shares)	2,583
Award vesting period	3 years
Grants in period, weighted average grant date fair value (in dollars per share)	$ 19.35

Income Taxes (Details)

Income Taxes (Details)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	21.50%	25.34%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (“AOCI/AOCL”) - Componenets of AOCL (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount	$ 22,644	$ (24,042)
Tax Effect	(5,536)	5,878
Net of Tax Amount	17,108	(18,164)
Net unrealized holding gains (losses) on securities available for sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount	14,531	(33,145)
Tax Effect	(3,552)	8,104
Net of Tax Amount	10,979	(25,041)
Net unrealized holding gains on interest rate swaps designated as cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount	8,113	9,103
Tax Effect	(1,984)	(2,226)
Net of Tax Amount	$ 6,129	$ 6,877

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (“AOCI/AOCL”) - Components of Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Before Tax Amount
Total other comprehensive (loss) income, Before Tax Amount	$ 7,901	$ (4,312)	$ 46,686	$ (23,079)
Tax Effect
Total other comprehensive (loss) income, Tax Effect	(1,932)	1,054	(11,414)	5,901
Net of Tax Amount
Reclassification adjustment for net gains (losses) included in net income, Net of Tax Amount	(965)	(160)	(2,242)	(18)
Other comprehensive income (loss)	5,969	(3,258)	35,272	(17,178)
Net unrealized holding gains (losses) on securities available for sale:
Before Tax Amount
Change in fair value arising during the period, Before Tax Amount	9,087	(6,537)	49,578	(34,103)
Reclassification adjustment for net gains (losses) included in net income, Before Tax Amount	(906)	15	(1,902)	(1)
Total other comprehensive (loss) income, Before Tax Amount	8,181	(6,522)	47,676	(34,104)
Tax Effect
Change in fair value arising during the period, Tax Effect	(2,221)	1,599	(12,121)	8,734
Reclassification adjustment for net gains (losses) included in net income, Tax Effect	221	(4)	465	0
Total other comprehensive (loss) income, Tax Effect	(2,000)	1,595	(11,656)	8,734
Net of Tax Amount
Change in fair value arising during the period, Net of Tax Amount	6,866	(4,938)	37,457	(25,369)
Reclassification adjustment for net gains (losses) included in net income, Net of Tax Amount	(685)	11	(1,437)	(1)
Other comprehensive income (loss)	6,181	(4,927)	36,020	(25,370)
Net unrealized holding gains on interest rate swaps designated as cash flow hedges:
Before Tax Amount
Change in fair value arising during the period, Before Tax Amount	90	2,437	75	11,045
Reclassification adjustment for net gains (losses) included in net income, Before Tax Amount	(370)	(227)	(1,065)	(20)
Total other comprehensive (loss) income, Before Tax Amount	(280)	2,210	(990)	11,025
Tax Effect
Change in fair value arising during the period, Tax Effect	(22)	(597)	(18)	(2,836)
Reclassification adjustment for net gains (losses) included in net income, Tax Effect	90	56	260	3
Total other comprehensive (loss) income, Tax Effect	68	(541)	242	(2,833)
Net of Tax Amount
Change in fair value arising during the period, Net of Tax Amount	68	1,840	57	8,209
Reclassification adjustment for net gains (losses) included in net income, Net of Tax Amount	(280)	(171)	(805)	(17)
Other comprehensive income (loss)	$ (212)	$ 1,669	$ (748)	$ 8,192

Stockholders_ Equity (Details)

Stockholders’ Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 07, 2019	Feb. 28, 2019	Feb. 01, 2019	Jan. 23, 2019	Mar. 13, 2018	Feb. 28, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Dividend paid					$ 40,000		$ 0	$ 40,000
Dividends, declared (in dollars per share)					$ 0.94
Class A common stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)							28,985,996		26,851,832
Common stock, shares issued (in shares)							28,985,996		26,851,832
Class B common stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)							14,218,596		16,330,917
Common stock, shares issued (in shares)							17,751,053		17,751,053
Treasury stock (in shares)	2,112,321						3,532,457		1,420,136
Treasury stock, acquired (in shares)	2,112,321
Treasury stock acquired (in dollars per share)	$ 13.48
Treasury stock acquired	$ 28,500
Common Stock | Class A common stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)							28,985,996	24,737,470	26,851,832	24,737,470
Common Stock | Class B common stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)							14,218,596	17,751,053	16,330,917	17,751,053
IPO Over-allotment Option | Common Stock | Class A common stock
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)				229,019
Price per share (in dollars per share)				$ 13
Consideration received on transaction				$ 3,000
Private Placement | Common Stock | Class A common stock
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)		1,750,000	153,846
Consideration received on transaction						$ 26,700

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 1.3	$ 1.5	$ 4.1	$ 4.5

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Off-Balance Sheet Credit Risk (Details) $ in Thousands	Sep. 30, 2019USD ($)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	$ 988,218
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	821,197
Credit card facilities (1)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	145,866
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	15,825
Commercial letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	$ 5,330

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Securities available for sale
Securities available for sale	$ 1,485,202	$ 1,586,051
Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	1,485,202	1,586,051
Bank owned life insurance	210,414	206,141
Derivative instruments	15,594	11,491
Assets, fair value	1,711,210	1,803,683
Liabilities
Derivative instruments	15,504	2,388
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale	0	0
Bank owned life insurance	0	0
Derivative instruments	0	0
Assets, fair value	0	0
Liabilities
Derivative instruments	0	0
Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale	1,485,202	1,586,051
Bank owned life insurance	210,414	206,141
Derivative instruments	15,594	11,491
Assets, fair value	1,711,210	1,803,683
Liabilities
Derivative instruments	15,504	2,388
Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale	0	0
Bank owned life insurance	0	0
Derivative instruments	0	0
Assets, fair value	0	0
Liabilities
Derivative instruments	0	0
U.S. government sponsored enterprise debt securities
Securities available for sale
Securities available for sale	940,260	820,779
U.S. government sponsored enterprise debt securities | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	940,260	820,779
U.S. government sponsored enterprise debt securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale	0	0
U.S. government sponsored enterprise debt securities | Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale	940,260	820,779
U.S. government sponsored enterprise debt securities | Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale	0	0
Corporate debt securities
Securities available for sale
Securities available for sale	243,149	352,555
Corporate debt securities | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	243,149	352,555
Corporate debt securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale	0	0
Corporate debt securities | Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale	243,149	352,555
Corporate debt securities | Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale	0	0
U.S. government agency debt securities
Securities available for sale
Securities available for sale	226,644	216,985
U.S. government agency debt securities | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	226,644	216,985
U.S. government agency debt securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale	0	0
U.S. government agency debt securities | Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale	226,644	216,985
U.S. government agency debt securities | Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale	0	0
Municipal bonds
Securities available for sale
Securities available for sale	50,198	160,212
Municipal bonds | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	50,198	160,212
Municipal bonds | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale	0	0
Municipal bonds | Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale	50,198	160,212
Municipal bonds | Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale	0	0
Mutual funds
Securities available for sale
Securities available for sale	23,957	23,110
Mutual funds | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	23,957	23,110
Mutual funds | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale	0	0
Mutual funds | Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale	23,957	23,110
Mutual funds | Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale	0	0
U.S treasury securities
Securities available for sale
Securities available for sale	994
U.S treasury securities | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	994
U.S treasury securities | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale	0
U.S treasury securities | Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale	994
U.S treasury securities | Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale	$ 0
Commercial paper
Securities available for sale
Securities available for sale		12,410
Commercial paper | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale		12,410
Commercial paper | Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Securities available for sale
Securities available for sale		0
Commercial paper | Fair Value, Measurements, Recurring | Third-Party Models with Observable Market Inputs (Level 2)
Securities available for sale
Securities available for sale		12,410
Commercial paper | Fair Value, Measurements, Recurring | Internal Models with Unobservable Market Inputs (Level 3)
Securities available for sale
Securities available for sale		$ 0

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Impairments	$ 0
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	1,918
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0
Significant Other Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	$ 0

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	Dec. 31, 2018USD ($)
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (liabilities) measured at fair value	$ 0

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Instruments Where Fair Value Differes from Carrying Value (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Carrying Value
Financial assets:
Loans	$ 2,752,224	$ 2,850,015
Financial liabilities:
Time deposits	1,713,322	1,745,025
Advances from the FHLB	1,170,000	1,166,000
Junior subordinated debentures	92,246	118,110
Estimated Fair Value
Financial assets:
Loans	2,635,286	2,739,721
Financial liabilities:
Time deposits	1,729,324	1,740,752
Advances from the FHLB	1,181,775	1,167,213
Junior subordinated debentures	$ 86,757	$ 99,450

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jan. 31, 2019	Dec. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net income available to common stockholders			$ 11,931	$ 11,551	$ 37,859	$ 31,403
Basic weighted average shares outstanding (in shares)			42,466,000	42,489,000	42,562,000	42,489,000
Dilutive effect of share-based compensation awards (in shares)			449,000	0	319,000	0
Diluted weighted average shares outstanding (in shares)			42,915,000	42,489,000	42,881,000	42,489,000
Basic earnings per common share (in dollars per share)			$ 0.28	$ 0.27	$ 0.89	$ 0.74
Diluted earnings per common share (in dollars per share)			$ 0.28	$ 0.27	$ 0.88	$ 0.74
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)						0
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation (in shares)					738,138
Grants in period (in shares)	1,299	736,839