Amerant Bancorp (AMTB) 10-Q 10 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 10, 2019
Entity Registrant Name	Mercantil Bank Holding Corp
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	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Class A common stock
Entity Common Stock, Shares Outstanding		28,985,996
Class B common stock
Entity Common Stock, Shares Outstanding		14,218,596

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 26,821	$ 25,756
Interest earning deposits with banks	62,868	59,954
Cash and cash equivalents	89,689	85,710
Securities
Available for sale	1,551,591	1,586,051
Held to maturity	83,909	85,188
Federal Reserve Bank and Federal Home Loan Bank stock	65,828	70,189
Securities	1,701,328	1,741,428
Loans held for sale	9,968	0
Loans held for investment, gross	5,734,438	5,920,175
Less: Allowance for loan losses	60,322	61,762
Loans held for investment, net	5,674,116	5,858,413
Bank owned life insurance	207,546	206,142
Premises and equipment, net	123,930	123,503
Deferred tax assets, net	9,858	16,310
Goodwill	19,193	19,193
Accrued interest receivable and other assets	66,727	73,648
Total assets	7,902,355	8,124,347
Deposits
Noninterest bearing	775,015	768,822
Interest bearing	1,229,487	1,288,030
Savings and money market	1,524,554	1,588,703
Time	2,359,132	2,387,131
Total deposits	5,888,188	6,032,686
Advances from the Federal Home Loan Bank and other borrowings	1,070,000	1,166,000
Junior subordinated debentures held by trust subsidiaries	118,110	118,110
Accounts payable, accrued liabilities and other liabilities	47,308	60,133
Total liabilities	7,123,606	7,376,929
Commitments and contingencies (Note 12)
Stockholders’ equity
Additional paid in capital	415,864	385,367
Retained earnings	406,733	393,662
Accumulated other comprehensive loss	(2,149)	(18,164)
Total stockholders' equity	778,749	747,418
Total liabilities and stockholders' equity	7,902,355	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	Mar. 31, 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 (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest income
Loans	$ 66,722	$ 59,670
Investment securities	12,581	11,741
Interest earning deposits with banks	1,004	520
Total interest income	80,307	71,931
Interest expense
Interest bearing demand deposits	274	89
Savings and money market deposits	3,733	2,584
Time deposits	12,553	8,700
Advances from the Federal Home Loan Bank	6,205	5,990
Junior subordinated debentures	2,105	1,935
Total interest expense	24,870	19,298
Net interest income	55,437	52,633
Provision for loan losses	0	0
Net interest income after provision for loan losses	55,437	52,633
Noninterest income
Deposits and service fees	4,086	4,582
Brokerage, advisory and fiduciary activities	3,688	4,415
Change in cash surrender value of bank owned life insurance	1,404	1,444
Cards and trade finance servicing fees	915	1,062
Gain on early extinguishment of advances from the Federal Home Loan Bank	557	0
Data processing and fees for other services	520	881
Securities gains, net	4	0
Other noninterest income	1,982	1,561
Total noninterest income	13,156	13,945
Noninterest expense
Salaries and employee benefits	33,437	34,041
Occupancy and equipment	4,042	3,715
Professional and other services fees	3,444	6,444
Telecommunication and data processing	3,026	3,084
Depreciation and amortization	1,942	2,141
FDIC assessments and insurance	1,393	1,447
Other operating expenses	4,661	4,773
Total noninterest expenses	51,945	55,645
Net income before income tax	16,648	10,933
Income tax expense	(3,577)	(1,504)
Net income	13,071	9,429
Other comprehensive income (loss), net of tax
Net unrealized holding gains (losses) on securities available for sale arising during the period	16,278	(14,977)
Net unrealized holding (losses) gains on cash flow hedges arising during the period	(11)	4,280
Reclassification adjustment for net (gains) losses included in net income	(252)	90
Other comprehensive income (loss)	16,015	(10,607)
Comprehensive income (loss)	$ 29,086	$ (1,178)
Earnings Per Share (Note 14):
Basic earnings per common share (in dollars per share)	$ 0.31	$ 0.22
Diluted earnings per common share (in dollars per share)	$ 0.30	$ 0.22

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
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	9,429							9,429
Other comprehensive (loss) income	(10,607)								(10,607)
Shares Outstanding (in shares) at Mar. 31, 2018				24,737,470	17,751,053
Ending balance at Mar. 31, 2018	712,272			$ 2,474	$ 1,775	367,505	0	357,258	(16,740)
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	1,492					1,492
Net income	13,071							13,071
Other comprehensive (loss) income	16,015								16,015
Shares Outstanding (in shares) at Mar. 31, 2019		28,985,996	14,218,596	28,985,996	14,218,596
Ending balance at Mar. 31, 2019	$ 778,749			$ 2,899	$ 1,775	$ 415,864	$ (46,373)	$ 406,733	$ (2,149)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 13,071	$ 9,429
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan losses	0	0
Net premium amortization on securities	3,453	4,411
Depreciation and amortization	1,942	2,141
Stock-based compensation expense	1,492	0
Increase in cash surrender value of bank owned life insurance	(1,404)	(1,444)
Deferred taxes, securities net gains or losses and others	1,238	(5,349)
Gain on early extinguishment of advances from the FHLB	(557)	0
Net changes in operating assets and liabilities:
Accrued interest receivable and other assets	8,777	(6,679)
Account payable, accrued liabilities and other liabilities	(15,431)	11,132
Net cash provided by operating activities	12,581	13,641
Purchases of investment securities:
Available for sale	(110,170)	(60,793)
Federal Home Loan Bank stock	(4,888)	(6,802)
Purchases of investment securities	(115,058)	(67,595)
Maturities, sales and calls of investment securities:
Available for sale	162,796	57,028
Held to maturity	1,205	531
Federal Home Loan Bank stock	9,248	4,250
Maturities, sales and calls of investment securities	173,249	61,809
Net decrease in loans	22,173	108,571
Proceeds from loan portfolio sales	152,177	12,958
Net purchases of premises and equipment, and others	(1,951)	(1,904)
Net proceeds from sale of subsidiary	0	7,500
Net cash provided by investing activities	230,590	121,339
Cash flows from financing activities
Net decrease in demand, savings and money market accounts	(116,499)	(96,787)
Net (decrease) increase in time deposits	(27,999)	54,019
Proceeds from Advances from the Federal Home Loan Bank and other borrowings	170,000	430,000
Repayments of Advances from the Federal Home Loan Bank and other borrowings	(265,447)	(370,000)
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	(239,192)	(22,768)
Net increase in cash and cash equivalents	3,979	112,212
Cash and cash equivalents
Beginning of period	85,710	153,445
End of period	89,689	265,657
Supplemental disclosures of cash flow information
Cash paid for Interest	24,086	18,255
Cash paid for Income taxes	$ 385	$ 81

Business, Basis of Presentation

Business, Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 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 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 ”) 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 is rebranding as “Amerant.” The Company’s principal subsidiaries have adopted this name and logo. The Company will use the Amerant brand and will officially change its corporate name upon approval at its annual shareholders’ meeting in June 2019. 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. b) 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., or MSF, the Company’s former parent company. See Note 11 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. c) Subsequent Events The effects of significant subsequent events, if any, have been recognized or disclosed in these unaudited interim consolidated financial statements. d) Basis of Presentation and Summary of Significant Accounting Policies The accompanying unaudited interim consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X of the SEC. 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. generally accepted accounting principles (“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 on 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 reporting unit to which goodwill has been assigned 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. Revisions In 2018, the Company determined to revise its presentation of loans by classes to correct for certain immaterial misclassifications in the presentation of loans by classes in the footnotes to the Company’s unaudited interim consolidated financial statements as of March 31, 2018. The Company assessed the impact of these misclassifications and determined they had no effect on the unaudited interim consolidated balance sheet as of March 31, 2018, the unaudited interim consolidated statements of operations and comprehensive income or the unaudited interim consolidated statement of cash flows for the three months ended March 31, 2018. The following tables show the effects of the correction of the misclassifications to the footnotes to the Company’s unaudited interim consolidated financial statements as of March 31, 2018. This change in classification is reflected in the footnotes to the unaudited interim consolidated financial statements as of March 31, 2019 and for the three months ended March 31, 2019 and 2018. Changes in the allocation of allowance for loan losses and its allocation by impairment methodology and the related investment in loans: As reported: Three Months Ended March 31, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 30,246 $ 33,731 $ 4,362 $ 3,661 $ 72,000 (Reversal of) provision for loan losses (864 ) 578 (691 ) 977 — Loans charged-off Domestic — (382 ) — (19 ) (401 ) International — — — (400 ) (400 ) Recoveries 34 832 — 53 919 Balances at end of the period $ 29,416 $ 34,759 $ 3,671 $ 4,272 $ 72,118 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 2,226 $ — $ — $ 2,226 Collectively evaluated 29,416 32,533 3,671 4,272 69,892 $ 29,416 $ 34,759 $ 3,671 $ 4,272 $ 72,118 Investment in loans, net of unearned income Individually evaluated $ 11,238 $ 15,055 $ — $ 342 $ 26,635 Collectively evaluated 2,699,872 2,243,345 416,292 564,306 5,923,815 $ 2,711,110 $ 2,258,400 $ 416,292 $ 564,648 $ 5,950,450 Changes in the allocation of allowance for loan losses and its allocation by impairment methodology and the related investment in loans: As revised: Three Months Ended March 31, 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 (821 ) 535 (691 ) 977 — Loans charged-off Domestic — (382 ) — (19 ) (401 ) International — — — (400 ) (400 ) Recoveries 34 832 — 53 919 Balances at end of the period $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 2,226 $ — $ — $ 2,226 Collectively evaluated 30,503 31,446 3,671 4,272 69,892 $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Investment in loans, net of unearned income Individually evaluated $ 11,238 $ 15,055 $ — $ 342 $ 26,635 Collectively evaluated 2,803,394 2,139,788 416,292 564,341 5,923,815 $ 2,814,632 $ 2,154,843 $ 416,292 $ 564,683 $ 5,950,450 Changes in the allocation of allowance for loan losses and its allocation by impairment methodology and the related investment in loans: Effects of change: Three Months Ended March 31, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 1,044 $ (1,044 ) $ — $ — $ — (Reversal of) provision for loan losses 43 (43 ) — — — Loans charged-off Domestic — — — — — International — — — — — Recoveries — — — — — Balances at end of the period $ 1,087 $ (1,087 ) $ — $ — $ — Allowance for loan losses by impairment methodology Individually evaluated $ — $ — $ — $ — $ — Collectively evaluated 1,087 (1,087 ) — — — $ 1,087 $ (1,087 ) $ — $ — $ — Investment in loans, net of unearned income Individually evaluated $ — $ — $ — $ — $ — Collectively evaluated 103,522 (103,557 ) — 35 — $ 103,522 $ (103,557 ) $ — $ 35 $ —

Securities

Securities	3 Months Ended
	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Securities	Securities Amortized cost and approximate fair values of securities available for sale are summarized as follows: March 31, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses U.S. government sponsored enterprise debt securities $ 899,571 $ 4,687 $ (13,800 ) $ 890,458 Corporate debt securities 258,421 1,089 (1,168 ) 258,342 U.S. government agency debt securities 218,813 362 (3,839 ) 215,336 Municipal bonds 162,123 2,295 (430 ) 163,988 Mutual funds 24,267 — (800 ) 23,467 Commercial paper — — — — $ 1,563,195 $ 8,433 $ (20,037 ) $ 1,551,591 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 March 31, 2019 and December 31, 2018 , the Company had no foreign sovereign 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: March 31, 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 $ 74,413 $ (1,995 ) $ 524,470 $ (11,805 ) $ 598,883 $ (13,800 ) Corporate debt securities 72,106 (365 ) 75,776 (803 ) 147,882 (1,168 ) Municipal bonds — — 48,859 (430 ) 48,859 (430 ) U.S. government agency debt securities 43,198 (436 ) 136,260 (3,403 ) 179,458 (3,839 ) Mutual funds — — 23,220 (800 ) 23,220 (800 ) Commercial paper — — — — — — $ 189,717 $ (2,796 ) $ 808,585 $ (17,241 ) $ 998,302 $ (20,037 ) 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 March 31, 2019 and December 31, 2018 , debt securities issued or guaranteed by U.S. government-sponsored entities and agencies held by the Company were issued by institutions which the Company believes to posses 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 have the intent 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 municipal and corporate debt securities, at March 31, 2019 and 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: March 31, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses Securities Held to Maturity - U.S. government sponsored enterprise debt securities $ 81,088 $ 79 $ (1,635 ) $ 79,532 U.S. Government agency debt securities 2,821 22 — 2,843 $ 83,909 $ 101 $ (1,635 ) $ 82,375 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 March 31, 2019 are as follows: Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Within 1 year $ 34,856 $ 34,769 $ — $ — After 1 year through 5 years 239,679 239,297 — — After 5 years through 10 years 172,190 172,421 — — After 10 years 1,092,203 1,081,637 83,909 82,375 No contractual maturities 24,267 23,467 — — $ 1,563,195 $ 1,551,591 $ 83,909 $ 82,375

Loans

Loans	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Loans	Loans The loan portfolio consists of the following loan classes: (in thousands) March 31, December 31, Real estate loans Commercial real estate Nonowner occupied $ 1,852,903 $ 1,809,356 Multi-family residential 878,239 909,439 Land development and construction loans 291,416 326,644 3,022,558 3,045,439 Single-family residential 535,306 533,481 Owner occupied 801,856 777,022 4,359,720 4,355,942 Commercial loans 1,239,525 1,380,428 Loans to financial institutions and acceptances 27,985 68,965 Consumer loans and overdrafts 107,208 114,840 $ 5,734,438 $ 5,920,175 The amounts above include loans under syndication facilities of approximately $640 million and $807 million at March 31, 2019 and December 31, 2018 , respectively, which include Shared National Credit facilities and agreements to enter into credit agreements among other lenders (club deals), and other agreements. The following tables summarize international loans by country, net of loans fully collateralized with cash of approximately $18.4 million and $19.5 million at March 31, 2019 and December 31, 2018 , respectively. March 31, 2019 (in thousands) Venezuela Others (1) Total Real estate loans Single-family residential (2) $ 124,772 $ 6,525 $ 131,297 Commercial loans — 63,061 63,061 Loans to financial institutions and acceptances — 8,000 8,000 Consumer loans and overdrafts (3) 25,763 8,228 33,991 $ 150,535 $ 85,814 $ 236,349 __________________ (1) Loans to borrowers in fifteen 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 Venezuela 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 Company determined to discontinue its international credit cards in April 2019. 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 seventeen 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 Venezuela 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 March 31, 2019 and December 31, 2018 are summarized in the following tables: March 31, 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 $ 1,852,903 $ 1,852,903 $ — $ — $ — $ — $ — $ — Multi-family residential 878,239 877,574 — 665 — 665 665 — Land development and construction loans 291,416 291,416 — — — — — — 3,022,558 3,021,893 — 665 — 665 665 — Single-family residential 535,306 523,172 7,802 921 3,411 12,134 6,514 — Owner occupied 801,856 799,187 408 1,880 381 2,669 5,192 — 4,359,720 4,344,252 8,210 3,466 3,792 15,468 12,371 — Commercial loans 1,239,525 1,234,890 3,151 399 1,085 4,635 7,361 — Loans to financial institutions and acceptances 27,985 27,985 — — — — — — Consumer loans and overdrafts 107,208 105,434 587 434 753 1,774 37 749 $ 5,734,438 $ 5,712,561 $ 11,948 $ 4,299 $ 5,630 $ 21,877 $ 19,769 $ 749 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 March 31, 2019 and December 31, 2018 , loans with an outstanding principal balance of $1,289 million and $1,680 million , respectively, were pledged as collateral to secure advances from the FHLB.

Allowance for Loan Losses

Allowance for Loan Losses	3 Months Ended
	Mar. 31, 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 months ended March 31, 2019 and 2018 , and its allocation by impairment methodology and the related investment in loans, net as of March 31, 2019 and 2018 are summarized in the following tables: Three Months Ended March 31, 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 (322 ) (31 ) (339 ) 692 — Loans charged-off Domestic — (992 ) — (196 ) (1,188 ) International — (18 ) — (406 ) (424 ) Recoveries — 123 — 49 172 Balances at end of the period $ 22,456 $ 29,100 $ 106 $ 8,660 $ 60,322 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 1,593 $ — $ 1,202 $ 2,795 Collectively evaluated 22,456 27,507 106 7,458 57,527 $ 22,456 $ 29,100 $ 106 $ 8,660 $ 60,322 Investment in loans, net of unearned income Individually evaluated $ 711 $ 12,325 $ — $ 3,392 $ 16,428 Collectively evaluated 3,016,569 2,137,165 27,985 536,291 5,718,010 $ 3,017,280 $ 2,149,490 $ 27,985 $ 539,683 $ 5,734,438 Three Months Ended March 31, 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 (821 ) 535 (691 ) 977 — Loans charged-off Domestic — (382 ) — (19 ) (401 ) International — — — (400 ) (400 ) Recoveries 34 832 — 53 919 Balances at end of the period $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 2,226 $ — $ — $ 2,226 Collectively evaluated 30,503 31,446 3,671 4,272 69,892 $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Investment in loans, net of unearned income Individually evaluated $ 11,238 $ 15,055 $ — $ 342 $ 26,635 Collectively evaluated 2,803,394 2,139,788 416,292 564,341 5,923,815 $ 2,814,632 $ 2,154,843 $ 416,292 $ 564,683 $ 5,950,450 The following is a summary of the recorded investment amount of loan sales by portfolio segment: Three Months Ended March 31, Real Estate Commercial Financial Consumer Total 2019 $ 23,475 $ 126,838 $ — $ 1,864 $ 152,177 2018 $ 2,958 $ 10,000 $ — $ — $ 12,958 The following is a summary of impaired loans as of March 31, 2019 and December 31, 2018 March 31, 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 $ — $ — $ — $ 5,188 $ — $ — Multi-family residential — 711 711 719 716 — Land development and construction — — — — — — — 711 711 5,907 716 — Single-family residential 3,411 289 3,700 4,182 3,802 1,346 Owner occupied 363 4,352 4,715 5,187 4,715 159 3,774 5,352 9,126 15,276 9,233 1,505 Commercial loans 7,169 120 7,289 7,178 8,427 1,289 Consumer loans and overdrafts 2 11 13 17 11 1 $ 10,945 $ 5,483 $ 16,428 $ 22,471 $ 17,671 $ 2,795 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. During the three months ended March 31, 2019 and 2018, the Company recognized interest income of $ 18 thousand and $25 thousand , respectively, on impaired loans. There were no new troubled debt restructurings (“TDRs”) during the three months ended March 31, 2019 . Consequently, during the three months ended March 31, 2019, the Company did not incur any charge-offs against the allowance for loan losses as a result of TDR loans. Since March 31, 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 March 31, 2019 and December 31, 2018 are summarized in the following tables: March 31, 2019 Credit Risk Rating Nonclassified Classified (in thousands) Pass Special Mention Substandard Doubtful Loss Total Real estate loans Commercial real estate Nonowner occupied $ 1,844,618 $ 8,285 $ — $ — $ — $ 1,852,903 Multi-family residential 877,574 665 — — 878,239 Land development and construction loans 291,416 — — — — 291,416 3,013,608 8,285 665 — — 3,022,558 Single-family residential 528,792 — 6,514 — — 535,306 Owner occupied 780,457 12,767 8,632 — — 801,856 4,322,857 21,052 15,811 — — 4,359,720 Commercial loans 1,225,901 3,992 9,073 559 — 1,239,525 Loans to financial institutions and acceptances 27,985 — — — — 27,985 Consumer loans and overdrafts 101,264 — 5,944 — — 107,208 $ 5,678,007 $ 25,044 $ 30,828 $ 559 $ — $ 5,734,438 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	3 Months Ended
	Mar. 31, 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 March 31, 2019 and December 31, 2018 . Time deposits in denominations of $250,000 or more amounted to approximately $739 million and $718 million at March 31, 2019 and December 31, 2018 , respectively. Time deposits include brokered time deposits, all in denominations of less than $100,000 . As of March 31, 2019 and December 31, 2018 , brokered time deposits amounted to $589 million and $642 million , respectively.

Advances From the Federal Home

Advances From the Federal Home Loan Bank and Other Borrowings	3 Months Ended
	Mar. 31, 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 March 31, 2019 December 31, 2018 (in thousands, except percentages) 2019 1.80% to 3.86% $ 385,000 $ 440,000 2020 1.50% to 2.74% 265,000 306,000 2021 1.93% to 3.08% 210,000 210,000 2022 2.48% to 2.80% 120,000 120,000 2023 and after 2.95% to 3.23% 90,000 90,000 $ 1,070,000 $ 1,166,000

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments At March 31, 2019 and December 31, 2018 , the fair values of the Company’s derivative instruments were as follows: March 31, 2019 December 31, 2018 (in thousands) Other Assets Other Liabilities Other Assets Other Liabilities Interest rate swaps designated as cash flow hedges $ — $ — $ 9,386 $ 283 Interest rate swaps not designated as hedging instruments: Customers 4,815 — 1,420 — Third party broker — 4,815 — 1,420 4,815 4,815 1,420 1,420 Interest rate caps not designated as hedging instruments: Customers — 176 — 685 Third party broker 176 — 685 — 176 176 685 685 $ 4,991 $ 4,991 $ 11,491 $ 2,388 Derivatives Designated as Hedging Instruments In February and March 2019, the Company terminated the interest rate swaps designated as cash flow hedges. The Company will recognize the contracts’ cumulative net unrealized gains in earnings over the remaining original life of the terminated interest rate swaps. At December 31, 2018 , the Company’s interest rate swaps designated as cash flow hedges involved 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. 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 three months ended March 31, 2019 and 2018 . Derivatives Not Designated as Hedging Instruments At March 31, 2019 and December 31, 2018 , the Company had twelve and eight interest rate swap contracts with customers with a total notional amount of $145.4 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 March 31, 2019 and December 31, 2018 , the Company had interest rate swap mirror contracts with a third party broker with similar terms. At March 31, 2019 and December 31, 2018 , the Company had sixteen interest rate cap contracts with customers with a total notional amount of $320.8 million and $323.7 million , respectively. In addition, at March 31, 2019 and December 31, 2018 , the Company had interest rate cap mirror contracts with various third party brokers with similar terms.

Stock-based Incentive Compensat

Stock-based Incentive Compensation Plan	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Incentive Compensation Plan	Stock-based Incentive Compensation Plan The Company sponsors the Mercantil Bank Holding Corporation 2018 Equity and Incentive Compensation Plan (the “2018 Equity Plan”). See Note 11 to the Company’s audited consolidated financial statements on the Form 10-K for more information on the 2018 Equity Plan and restricted stock awards for the year ended 2018. On January 21, 2019, the Company granted 1,299 shares of restricted stock to one of its employees. 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 $13.50 . During the three months ended March 31, 2019, the Company recorded $1.5 million of compensation expense related to restricted stock awards granted in December 2018 and January 2019. The total unamortized deferred compensation expense of $8.3 million for all unvested restricted stock outstanding at March 31, 2019 will be recognized over a weighted average period of 2 years .

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 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 three months ended March 31, 2019 and 2018 were 21.49% and 13.76% , 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.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss (“AOCL”)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Loss (“AOCL”)	Accumulated Other Comprehensive Loss (“AOCL”): The components of AOCL are summarized as follows using applicable blended average federal and state tax rates for each period: March 31, 2019 December 31, 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Unrealized losses on available for sale securities $ (11,604 ) $ 2,838 $ (8,766 ) $ (33,145 ) $ 8,104 $ (25,041 ) Unrealized gains on interest rate swaps designated as cash flow hedges 8,759 (2,142 ) $ 6,617 9,103 (2,226 ) $ 6,877 Total AOCL $ (2,845 ) $ 696 $ (2,149 ) $ (24,042 ) $ 5,878 $ (18,164 ) The components of other comprehensive income (loss) for the periods presented is summarized as follows: Three Months Ended March 31, 2019 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Unrealized gains (losses) on available for sale securities: Change in fair value arising during the period $ 21,545 $ (5,267 ) $ 16,278 $ (20,850 ) $ 5,873 $ (14,977 ) Reclassification adjustment for net gains included in net income (4 ) 1 (3 ) — — — 21,541 (5,266 ) 16,275 (20,850 ) 5,873 (14,977 ) Unrealized (losses) gains on interest rate swaps designated as cash flow hedges: Change in fair value arising during the period (15 ) 4 (11 ) 6,101 (1,821 ) 4,280 Reclassification adjustment for net interest (income) expense included in net income (329 ) 80 (249 ) 121 (31 ) 90 (344 ) 84 (260 ) 6,222 (1,852 ) 4,370 Total other comprehensive income (loss) $ 21,197 $ (5,182 ) $ 16,015 $ (14,628 ) $ 4,021 $ (10,607 )

Stockholders_ Equity

Stockholders’ Equity	3 Months Ended
	Mar. 31, 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 March 31, 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 shares of Class A common stock. The net proceeds to the Company from this transaction were approximately $3.0 million . MSF agreed to pay all underwriting discounts, commissions and offering expenses with respect to the IPO, including the over-allotment option. 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 proceeds 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 March 31, 2019 and December 31, 2018 were 17,751,053 . As of March 31, 2019 and December 31, 2018, there were 14,218,596 shares and 16,330,917 shares of Class B common stock outstanding. As of March 31, 2019 and December 31, 2018, the Company had 3,532,457 shares and 1,420,136 shares of Class B common stock, respectively, 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. Additionally, MSF no longer has any rights to register Company shares for resale. e) 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	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company and its subsidiaries are party 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 $1.6 million and $1.4 million for the three months ended March 31, 2019 and 2018 , respectively. Financial instruments whose contract amount represents off-balance sheet credit risk at March 31, 2019 are generally short-term and are as follows: (in thousands) Approximate Commitments to extend credit $ 884,142 Credit card facilities 196,901 Standby letters of credit 24,278 Commercial letters of credit 2,589 $ 1,107,910

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 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: March 31, 2019 (in thousands) Quoted Third-Party Internal Total Assets Securities available for sale U.S. government sponsored enterprise debt securities $ — $ 890,458 $ — $ 890,458 Corporate debt securities — 258,342 — 258,342 U.S. government agency debt securities — 215,336 — 215,336 Municipal bonds — 163,988 — 163,988 Mutual funds — 23,467 — 23,467 — 1,551,591 — 1,551,591 Bank owned life insurance — 207,546 — 207,546 Derivative instruments — 4,991 — 4,991 $ — $ 1,764,128 $ — $ 1,764,128 Liabilities Derivative instruments $ — $ 4,991 $ — $ 4,991 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 At the dates shown, there were no Level 3 assets or liabilities. 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. • 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 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 considers 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 March 31, 2019 : March 31, 2019 (in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Total Impairments Description Loans held for sale $ 9,968 $ — $ — $ — 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 on 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 fixed-rate loans, advances from the FHLB, and junior subordinated debentures 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: March 31, 2019 December 31, 2018 (in thousands) Carrying Estimated Carrying Estimated Financial assets Loans $ 2,792,815 $ 2,670,693 $ 2,850,015 $ 2,739,721 Financial liabilities Time deposits 1,770,303 1,772,212 1,745,025 1,740,752 Advances from the FHLB 1,070,000 1,074,596 1,166,000 1,167,213 Junior subordinated debentures 118,110 114,620 118,110 99,450

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 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 March 31, (in thousands, except per share data) 2019 2018 Numerator: Net income available to common stockholders $ 13,071 $ 9,429 Denominator: Basic weighted average shares outstanding 42,755 42,489 Dilutive effect of share-based compensation awards 159 — Diluted weighted average shares outstanding 42,914 42,489 Basic earnings per common share $ 0.31 $ 0.22 Diluted earnings per common share $ 0.30 $ 0.22 As of March 31, 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 March 31, 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 had a dilutive effect. As of March 31, 2018, the Company had no potentially dilutive instruments.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Information	Segment Information The following tables provide a summary of the Company’s financial information as of March 31, 2019 and December 31, 2018 and for the three months periods ended March 31, 2019 and 2018 on a managed basis. The Company’s definition of managed basis starts with the reported U.S. GAAP results and includes funds transfer pricing compensation and allocations of direct and indirect expenses from overhead, internal support centers, and product support centers. This allows management to assess the comparability of results from period-to-period arising from segment operations. The corresponding income tax impact related to tax-exempt items is recorded within income tax (expense)/benefit. (in thousands) Personal and Commercial Banking ("PAC") Corporate LATAM Treasury Institutional Total Three Months Ended March 31, 2019 Income Statement: Net interest income $ 50,044 $ 162 $ 403 $ 4,828 $ 55,437 (Reversal of) provision for loan losses (709 ) (517 ) (358 ) 1,584 — Net interest income after (reversal of) provision for loan losses 50,753 679 761 3,244 55,437 Noninterest income 5,210 74 3,005 4,867 13,156 Noninterest expense 40,878 449 3,127 7,491 51,945 Net income (loss) before income tax: Banking 15,085 304 639 620 16,648 Non-banking contribution (1) 762 5 — (767 ) — 15,847 309 639 (147 ) 16,648 Income tax (expense) benefit (3,785 ) (74 ) 420 (138 ) (3,577 ) Net income (loss) $ 12,062 $ 235 $ 1,059 $ (285 ) $ 13,071 As of March 31, 2019 Loans, net (2)(3) $ 5,711,728 $ 28,500 $ — $ (56,144 ) $ 5,684,084 Deposits $ 5,224,837 $ 19,079 $ 607,830 $ 36,442 $ 5,888,188 (in thousands) PAC Corporate LATAM Treasury Institutional Total Three Months Ended March 31, 2018 Income Statement: Net interest income $ 46,681 $ 1,480 $ 956 $ 3,516 $ 52,633 (Reversal of) provision for loan losses (2,139 ) (719 ) (117 ) 2,975 — Net interest income after (reversal of) provision for loan losses 48,820 2,199 1,073 541 52,633 Noninterest income 5,708 109 1,950 6,178 13,945 Noninterest expense 40,014 1,175 2,962 11,494 55,645 Net income (loss) before income tax: Banking 14,514 1,133 61 (4,775 ) 10,933 Non-banking contribution (1) 50 (11 ) — (39 ) — 14,564 1,122 61 (4,814 ) 10,933 Income tax (expense) benefit (2,221 ) (171 ) 312 576 (1,504 ) Net income (loss) $ 12,343 $ 951 $ 373 $ (4,238 ) $ 9,429 As of December 31, 2018 Loans, net (2) $ 5,845,266 $ 69,755 $ — $ (56,608 ) $ 5,858,413 Deposits $ 5,339,099 $ 16,293 $ 642,106 $ 35,188 $ 6,032,686 __________________ (1) Non-banking contribution reflects allocations of the net results of Amerant Trust and Amerant Investment subsidiaries to the customers’ primary business unit. (2) Provisions for the periods presented are allocated to each applicable reportable segment. The allowance for loan losses and unearned deferred loan costs and fees are reported entirely within Institutional. (3) Balances include loans held for sale of $10.0 million which are allocated to PAC.

Business, Basis of Presentati_2

Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Subsequent Events	Subsequent Events The effects of significant subsequent events, if any, have been recognized or disclosed in these unaudited interim consolidated financial statements.
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 reporting unit to which goodwill has been assigned 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.
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. • 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 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 considers 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 on 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 fixed-rate loans, advances from the FHLB, and junior subordinated debentures 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.

Business, Basis of Presentati_3

Business, Basis of Presentation and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of the Impact of the Reclassification to the Footnotes of the Company's Consolidated Financial Statements	The following tables show the effects of the correction of the misclassifications to the footnotes to the Company’s unaudited interim consolidated financial statements as of March 31, 2018. This change in classification is reflected in the footnotes to the unaudited interim consolidated financial statements as of March 31, 2019 and for the three months ended March 31, 2019 and 2018. Changes in the allocation of allowance for loan losses and its allocation by impairment methodology and the related investment in loans: As reported: Three Months Ended March 31, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 30,246 $ 33,731 $ 4,362 $ 3,661 $ 72,000 (Reversal of) provision for loan losses (864 ) 578 (691 ) 977 — Loans charged-off Domestic — (382 ) — (19 ) (401 ) International — — — (400 ) (400 ) Recoveries 34 832 — 53 919 Balances at end of the period $ 29,416 $ 34,759 $ 3,671 $ 4,272 $ 72,118 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 2,226 $ — $ — $ 2,226 Collectively evaluated 29,416 32,533 3,671 4,272 69,892 $ 29,416 $ 34,759 $ 3,671 $ 4,272 $ 72,118 Investment in loans, net of unearned income Individually evaluated $ 11,238 $ 15,055 $ — $ 342 $ 26,635 Collectively evaluated 2,699,872 2,243,345 416,292 564,306 5,923,815 $ 2,711,110 $ 2,258,400 $ 416,292 $ 564,648 $ 5,950,450 Changes in the allocation of allowance for loan losses and its allocation by impairment methodology and the related investment in loans: As revised: Three Months Ended March 31, 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 (821 ) 535 (691 ) 977 — Loans charged-off Domestic — (382 ) — (19 ) (401 ) International — — — (400 ) (400 ) Recoveries 34 832 — 53 919 Balances at end of the period $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 2,226 $ — $ — $ 2,226 Collectively evaluated 30,503 31,446 3,671 4,272 69,892 $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Investment in loans, net of unearned income Individually evaluated $ 11,238 $ 15,055 $ — $ 342 $ 26,635 Collectively evaluated 2,803,394 2,139,788 416,292 564,341 5,923,815 $ 2,814,632 $ 2,154,843 $ 416,292 $ 564,683 $ 5,950,450 Changes in the allocation of allowance for loan losses and its allocation by impairment methodology and the related investment in loans: Effects of change: Three Months Ended March 31, 2018 (in thousands) Real Estate Commercial Financial Consumer Total Balances at beginning of the period $ 1,044 $ (1,044 ) $ — $ — $ — (Reversal of) provision for loan losses 43 (43 ) — — — Loans charged-off Domestic — — — — — International — — — — — Recoveries — — — — — Balances at end of the period $ 1,087 $ (1,087 ) $ — $ — $ — Allowance for loan losses by impairment methodology Individually evaluated $ — $ — $ — $ — $ — Collectively evaluated 1,087 (1,087 ) — — — $ 1,087 $ (1,087 ) $ — $ — $ — Investment in loans, net of unearned income Individually evaluated $ — $ — $ — $ — $ — Collectively evaluated 103,522 (103,557 ) — 35 — $ 103,522 $ (103,557 ) $ — $ 35 $ —

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 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: March 31, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses U.S. government sponsored enterprise debt securities $ 899,571 $ 4,687 $ (13,800 ) $ 890,458 Corporate debt securities 258,421 1,089 (1,168 ) 258,342 U.S. government agency debt securities 218,813 362 (3,839 ) 215,336 Municipal bonds 162,123 2,295 (430 ) 163,988 Mutual funds 24,267 — (800 ) 23,467 Commercial paper — — — — $ 1,563,195 $ 8,433 $ (20,037 ) $ 1,551,591 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: March 31, 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 $ 74,413 $ (1,995 ) $ 524,470 $ (11,805 ) $ 598,883 $ (13,800 ) Corporate debt securities 72,106 (365 ) 75,776 (803 ) 147,882 (1,168 ) Municipal bonds — — 48,859 (430 ) 48,859 (430 ) U.S. government agency debt securities 43,198 (436 ) 136,260 (3,403 ) 179,458 (3,839 ) Mutual funds — — 23,220 (800 ) 23,220 (800 ) Commercial paper — — — — — — $ 189,717 $ (2,796 ) $ 808,585 $ (17,241 ) $ 998,302 $ (20,037 ) 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 held to maturity securities	Amortized cost and approximate fair values of securities held to maturity, are summarized as follows: March 31, 2019 Amortized Gross Unrealized Estimated (in thousands) Gains Losses Securities Held to Maturity - U.S. government sponsored enterprise debt securities $ 81,088 $ 79 $ (1,635 ) $ 79,532 U.S. Government agency debt securities 2,821 22 — 2,843 $ 83,909 $ 101 $ (1,635 ) $ 82,375 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 March 31, 2019 are as follows: Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Within 1 year $ 34,856 $ 34,769 $ — $ — After 1 year through 5 years 239,679 239,297 — — After 5 years through 10 years 172,190 172,421 — — After 10 years 1,092,203 1,081,637 83,909 82,375 No contractual maturities 24,267 23,467 — — $ 1,563,195 $ 1,551,591 $ 83,909 $ 82,375

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Schedule of loan portfolio by classes and countries	The following tables summarize international loans by country, net of loans fully collateralized with cash of approximately $18.4 million and $19.5 million at March 31, 2019 and December 31, 2018 , respectively. March 31, 2019 (in thousands) Venezuela Others (1) Total Real estate loans Single-family residential (2) $ 124,772 $ 6,525 $ 131,297 Commercial loans — 63,061 63,061 Loans to financial institutions and acceptances — 8,000 8,000 Consumer loans and overdrafts (3) 25,763 8,228 33,991 $ 150,535 $ 85,814 $ 236,349 __________________ (1) Loans to borrowers in fifteen 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 Venezuela 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 Company determined to discontinue its international credit cards in April 2019. 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 seventeen 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 Venezuela 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 loan portfolio consists of the following loan classes: (in thousands) March 31, December 31, Real estate loans Commercial real estate Nonowner occupied $ 1,852,903 $ 1,809,356 Multi-family residential 878,239 909,439 Land development and construction loans 291,416 326,644 3,022,558 3,045,439 Single-family residential 535,306 533,481 Owner occupied 801,856 777,022 4,359,720 4,355,942 Commercial loans 1,239,525 1,380,428 Loans to financial institutions and acceptances 27,985 68,965 Consumer loans and overdrafts 107,208 114,840 $ 5,734,438 $ 5,920,175
Schedule of loan portfolio delinquencies	The age analysis of the loan portfolio by class, including nonaccrual loans, as of March 31, 2019 and December 31, 2018 are summarized in the following tables: March 31, 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 $ 1,852,903 $ 1,852,903 $ — $ — $ — $ — $ — $ — Multi-family residential 878,239 877,574 — 665 — 665 665 — Land development and construction loans 291,416 291,416 — — — — — — 3,022,558 3,021,893 — 665 — 665 665 — Single-family residential 535,306 523,172 7,802 921 3,411 12,134 6,514 — Owner occupied 801,856 799,187 408 1,880 381 2,669 5,192 — 4,359,720 4,344,252 8,210 3,466 3,792 15,468 12,371 — Commercial loans 1,239,525 1,234,890 3,151 399 1,085 4,635 7,361 — Loans to financial institutions and acceptances 27,985 27,985 — — — — — — Consumer loans and overdrafts 107,208 105,434 587 434 753 1,774 37 749 $ 5,734,438 $ 5,712,561 $ 11,948 $ 4,299 $ 5,630 $ 21,877 $ 19,769 $ 749 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)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Schedule of allowance for loan losses	The following is a summary of the recorded investment amount of loan sales by portfolio segment: Three Months Ended March 31, Real Estate Commercial Financial Consumer Total 2019 $ 23,475 $ 126,838 $ — $ 1,864 $ 152,177 2018 $ 2,958 $ 10,000 $ — $ — $ 12,958 The analyses by loan segment of the changes in the allowance for loan losses for the three months ended March 31, 2019 and 2018 , and its allocation by impairment methodology and the related investment in loans, net as of March 31, 2019 and 2018 are summarized in the following tables: Three Months Ended March 31, 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 (322 ) (31 ) (339 ) 692 — Loans charged-off Domestic — (992 ) — (196 ) (1,188 ) International — (18 ) — (406 ) (424 ) Recoveries — 123 — 49 172 Balances at end of the period $ 22,456 $ 29,100 $ 106 $ 8,660 $ 60,322 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 1,593 $ — $ 1,202 $ 2,795 Collectively evaluated 22,456 27,507 106 7,458 57,527 $ 22,456 $ 29,100 $ 106 $ 8,660 $ 60,322 Investment in loans, net of unearned income Individually evaluated $ 711 $ 12,325 $ — $ 3,392 $ 16,428 Collectively evaluated 3,016,569 2,137,165 27,985 536,291 5,718,010 $ 3,017,280 $ 2,149,490 $ 27,985 $ 539,683 $ 5,734,438 Three Months Ended March 31, 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 (821 ) 535 (691 ) 977 — Loans charged-off Domestic — (382 ) — (19 ) (401 ) International — — — (400 ) (400 ) Recoveries 34 832 — 53 919 Balances at end of the period $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Allowance for loan losses by impairment methodology Individually evaluated $ — $ 2,226 $ — $ — $ 2,226 Collectively evaluated 30,503 31,446 3,671 4,272 69,892 $ 30,503 $ 33,672 $ 3,671 $ 4,272 $ 72,118 Investment in loans, net of unearned income Individually evaluated $ 11,238 $ 15,055 $ — $ 342 $ 26,635 Collectively evaluated 2,803,394 2,139,788 416,292 564,341 5,923,815 $ 2,814,632 $ 2,154,843 $ 416,292 $ 564,683 $ 5,950,450
Schedule of impaired loans	The following is a summary of impaired loans as of March 31, 2019 and December 31, 2018 March 31, 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 $ — $ — $ — $ 5,188 $ — $ — Multi-family residential — 711 711 719 716 — Land development and construction — — — — — — — 711 711 5,907 716 — Single-family residential 3,411 289 3,700 4,182 3,802 1,346 Owner occupied 363 4,352 4,715 5,187 4,715 159 3,774 5,352 9,126 15,276 9,233 1,505 Commercial loans 7,169 120 7,289 7,178 8,427 1,289 Consumer loans and overdrafts 2 11 13 17 11 1 $ 10,945 $ 5,483 $ 16,428 $ 22,471 $ 17,671 $ 2,795 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 March 31, 2019 and December 31, 2018 are summarized in the following tables: March 31, 2019 Credit Risk Rating Nonclassified Classified (in thousands) Pass Special Mention Substandard Doubtful Loss Total Real estate loans Commercial real estate Nonowner occupied $ 1,844,618 $ 8,285 $ — $ — $ — $ 1,852,903 Multi-family residential 877,574 665 — — 878,239 Land development and construction loans 291,416 — — — — 291,416 3,013,608 8,285 665 — — 3,022,558 Single-family residential 528,792 — 6,514 — — 535,306 Owner occupied 780,457 12,767 8,632 — — 801,856 4,322,857 21,052 15,811 — — 4,359,720 Commercial loans 1,225,901 3,992 9,073 559 — 1,239,525 Loans to financial institutions and acceptances 27,985 — — — — 27,985 Consumer loans and overdrafts 101,264 — 5,944 — — 107,208 $ 5,678,007 $ 25,044 $ 30,828 $ 559 $ — $ 5,734,438 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)	3 Months Ended
	Mar. 31, 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 March 31, 2019 December 31, 2018 (in thousands, except percentages) 2019 1.80% to 3.86% $ 385,000 $ 440,000 2020 1.50% to 2.74% 265,000 306,000 2021 1.93% to 3.08% 210,000 210,000 2022 2.48% to 2.80% 120,000 120,000 2023 and after 2.95% to 3.23% 90,000 90,000 $ 1,070,000 $ 1,166,000

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	At March 31, 2019 and December 31, 2018 , the fair values of the Company’s derivative instruments were as follows: March 31, 2019 December 31, 2018 (in thousands) Other Assets Other Liabilities Other Assets Other Liabilities Interest rate swaps designated as cash flow hedges $ — $ — $ 9,386 $ 283 Interest rate swaps not designated as hedging instruments: Customers 4,815 — 1,420 — Third party broker — 4,815 — 1,420 4,815 4,815 1,420 1,420 Interest rate caps not designated as hedging instruments: Customers — 176 — 685 Third party broker 176 — 685 — 176 176 685 685 $ 4,991 $ 4,991 $ 11,491 $ 2,388

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (“AOCL”) (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Components of AOCL	The components of AOCL are summarized as follows using applicable blended average federal and state tax rates for each period: March 31, 2019 December 31, 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Unrealized losses on available for sale securities $ (11,604 ) $ 2,838 $ (8,766 ) $ (33,145 ) $ 8,104 $ (25,041 ) Unrealized gains on interest rate swaps designated as cash flow hedges 8,759 (2,142 ) $ 6,617 9,103 (2,226 ) $ 6,877 Total AOCL $ (2,845 ) $ 696 $ (2,149 ) $ (24,042 ) $ 5,878 $ (18,164 )
Components of Other Comprehensive Loss	The components of other comprehensive income (loss) for the periods presented is summarized as follows: Three Months Ended March 31, 2019 2018 (in thousands) Before Tax Tax Net of Tax Before Tax Tax Net of Tax Unrealized gains (losses) on available for sale securities: Change in fair value arising during the period $ 21,545 $ (5,267 ) $ 16,278 $ (20,850 ) $ 5,873 $ (14,977 ) Reclassification adjustment for net gains included in net income (4 ) 1 (3 ) — — — 21,541 (5,266 ) 16,275 (20,850 ) 5,873 (14,977 ) Unrealized (losses) gains on interest rate swaps designated as cash flow hedges: Change in fair value arising during the period (15 ) 4 (11 ) 6,101 (1,821 ) 4,280 Reclassification adjustment for net interest (income) expense included in net income (329 ) 80 (249 ) 121 (31 ) 90 (344 ) 84 (260 ) 6,222 (1,852 ) 4,370 Total other comprehensive income (loss) $ 21,197 $ (5,182 ) $ 16,015 $ (14,628 ) $ 4,021 $ (10,607 )

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 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 March 31, 2019 are generally short-term and are as follows: (in thousands) Approximate Commitments to extend credit $ 884,142 Credit card facilities 196,901 Standby letters of credit 24,278 Commercial letters of credit 2,589 $ 1,107,910

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 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: March 31, 2019 (in thousands) Quoted Third-Party Internal Total Assets Securities available for sale U.S. government sponsored enterprise debt securities $ — $ 890,458 $ — $ 890,458 Corporate debt securities — 258,342 — 258,342 U.S. government agency debt securities — 215,336 — 215,336 Municipal bonds — 163,988 — 163,988 Mutual funds — 23,467 — 23,467 — 1,551,591 — 1,551,591 Bank owned life insurance — 207,546 — 207,546 Derivative instruments — 4,991 — 4,991 $ — $ 1,764,128 $ — $ 1,764,128 Liabilities Derivative instruments $ — $ 4,991 $ — $ 4,991 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 March 31, 2019 : March 31, 2019 (in thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Total Impairments Description Loans held for sale $ 9,968 $ — $ — $ —
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: March 31, 2019 December 31, 2018 (in thousands) Carrying Estimated Carrying Estimated Financial assets Loans $ 2,792,815 $ 2,670,693 $ 2,850,015 $ 2,739,721 Financial liabilities Time deposits 1,770,303 1,772,212 1,745,025 1,740,752 Advances from the FHLB 1,070,000 1,074,596 1,166,000 1,167,213 Junior subordinated debentures 118,110 114,620 118,110 99,450

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 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 March 31, (in thousands, except per share data) 2019 2018 Numerator: Net income available to common stockholders $ 13,071 $ 9,429 Denominator: Basic weighted average shares outstanding 42,755 42,489 Dilutive effect of share-based compensation awards 159 — Diluted weighted average shares outstanding 42,914 42,489 Basic earnings per common share $ 0.31 $ 0.22 Diluted earnings per common share $ 0.30 $ 0.22

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Summary of Financial Information on a Managed Basis	The following tables provide a summary of the Company’s financial information as of March 31, 2019 and December 31, 2018 and for the three months periods ended March 31, 2019 and 2018 on a managed basis. The Company’s definition of managed basis starts with the reported U.S. GAAP results and includes funds transfer pricing compensation and allocations of direct and indirect expenses from overhead, internal support centers, and product support centers. This allows management to assess the comparability of results from period-to-period arising from segment operations. The corresponding income tax impact related to tax-exempt items is recorded within income tax (expense)/benefit. (in thousands) Personal and Commercial Banking ("PAC") Corporate LATAM Treasury Institutional Total Three Months Ended March 31, 2019 Income Statement: Net interest income $ 50,044 $ 162 $ 403 $ 4,828 $ 55,437 (Reversal of) provision for loan losses (709 ) (517 ) (358 ) 1,584 — Net interest income after (reversal of) provision for loan losses 50,753 679 761 3,244 55,437 Noninterest income 5,210 74 3,005 4,867 13,156 Noninterest expense 40,878 449 3,127 7,491 51,945 Net income (loss) before income tax: Banking 15,085 304 639 620 16,648 Non-banking contribution (1) 762 5 — (767 ) — 15,847 309 639 (147 ) 16,648 Income tax (expense) benefit (3,785 ) (74 ) 420 (138 ) (3,577 ) Net income (loss) $ 12,062 $ 235 $ 1,059 $ (285 ) $ 13,071 As of March 31, 2019 Loans, net (2)(3) $ 5,711,728 $ 28,500 $ — $ (56,144 ) $ 5,684,084 Deposits $ 5,224,837 $ 19,079 $ 607,830 $ 36,442 $ 5,888,188 (in thousands) PAC Corporate LATAM Treasury Institutional Total Three Months Ended March 31, 2018 Income Statement: Net interest income $ 46,681 $ 1,480 $ 956 $ 3,516 $ 52,633 (Reversal of) provision for loan losses (2,139 ) (719 ) (117 ) 2,975 — Net interest income after (reversal of) provision for loan losses 48,820 2,199 1,073 541 52,633 Noninterest income 5,708 109 1,950 6,178 13,945 Noninterest expense 40,014 1,175 2,962 11,494 55,645 Net income (loss) before income tax: Banking 14,514 1,133 61 (4,775 ) 10,933 Non-banking contribution (1) 50 (11 ) — (39 ) — 14,564 1,122 61 (4,814 ) 10,933 Income tax (expense) benefit (2,221 ) (171 ) 312 576 (1,504 ) Net income (loss) $ 12,343 $ 951 $ 373 $ (4,238 ) $ 9,429 As of December 31, 2018 Loans, net (2) $ 5,845,266 $ 69,755 $ — $ (56,608 ) $ 5,858,413 Deposits $ 5,339,099 $ 16,293 $ 642,106 $ 35,188 $ 6,032,686 __________________ (1) Non-banking contribution reflects allocations of the net results of Amerant Trust and Amerant Investment subsidiaries to the customers’ primary business unit. (2) Provisions for the periods presented are allocated to each applicable reportable segment. The allowance for loan losses and unearned deferred loan costs and fees are reported entirely within Institutional. (3) Balances include loans held for sale of $10.0 million which are allocated to PAC.

Business, Basis of Presentati_4

Business, Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended
	Mar. 31, 2019subsidiary$ / shares	Dec. 31, 2018$ / shares
Class of Stock [Line Items]
Number of subsidiaries | subsidiary	2
Class A common stock
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Class B common stock
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Amerant Bank, N.A
Class of Stock [Line Items]
Ownership percentage of subsidiary	100.00%

Business, Basis of Presentati_5

Business, Basis of Presentation and Summary of Significant Accounting Policies - Revisions of Allowance For Loan Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Allowance for Credit Losses
Balances at beginning of the period	$ 61,762	$ 72,000
(Reversal of) provision for loan losses	0	0
Recoveries	172	919
Balances at end of the period	60,322	72,118
Allowance for loan losses by impairment methodology, Individually evaluated	2,795	2,226
Allowance for loan losses by impairment methodology, Collectively evaluated	57,527	69,892
Investment in loans, net of unearned income, Individually evaluated	16,428	26,635
Investment in loans, net of unearned income, Collectively evaluated	5,718,010	5,923,815
Total Loans, Net of Unearned Income	5,734,438	5,950,450
Domestic
Allowance for Credit Losses
Loans charged-off	(1,188)	(401)
International
Allowance for Credit Losses
Loans charged-off	(424)	(400)
Real estate loans
Allowance for Credit Losses
Balances at beginning of the period	22,778	31,290
(Reversal of) provision for loan losses	(322)	(821)
Recoveries	0	34
Balances at end of the period	22,456	30,503
Allowance for loan losses by impairment methodology, Individually evaluated	0	0
Allowance for loan losses by impairment methodology, Collectively evaluated	22,456	30,503
Investment in loans, net of unearned income, Individually evaluated	711	11,238
Investment in loans, net of unearned income, Collectively evaluated	3,016,569	2,803,394
Total Loans, Net of Unearned Income	3,017,280	2,814,632
Real estate loans | Domestic
Allowance for Credit Losses
Loans charged-off	0	0
Real estate loans | International
Allowance for Credit Losses
Loans charged-off	0	0
Commercial loans
Allowance for Credit Losses
Balances at beginning of the period	30,018	32,687
(Reversal of) provision for loan losses	(31)	535
Recoveries	123	832
Balances at end of the period	29,100	33,672
Allowance for loan losses by impairment methodology, Individually evaluated	1,593	2,226
Allowance for loan losses by impairment methodology, Collectively evaluated	27,507	31,446
Investment in loans, net of unearned income, Individually evaluated	12,325	15,055
Investment in loans, net of unearned income, Collectively evaluated	2,137,165	2,139,788
Total Loans, Net of Unearned Income	2,149,490	2,154,843
Commercial loans | Domestic
Allowance for Credit Losses
Loans charged-off	(992)	(382)
Commercial loans | International
Allowance for Credit Losses
Loans charged-off	(18)	0
Loans to financial institutions and acceptances
Allowance for Credit Losses
Balances at beginning of the period	445	4,362
(Reversal of) provision for loan losses	(339)	(691)
Recoveries	0	0
Balances at end of the period	106	3,671
Allowance for loan losses by impairment methodology, Individually evaluated	0	0
Allowance for loan losses by impairment methodology, Collectively evaluated	106	3,671
Investment in loans, net of unearned income, Individually evaluated	0	0
Investment in loans, net of unearned income, Collectively evaluated	27,985	416,292
Total Loans, Net of Unearned Income	27,985	416,292
Loans to financial institutions and acceptances | Domestic
Allowance for Credit Losses
Loans charged-off	0	0
Loans to financial institutions and acceptances | International
Allowance for Credit Losses
Loans charged-off	0	0
Consumer loans and overdrafts
Allowance for Credit Losses
Balances at beginning of the period	8,521	3,661
(Reversal of) provision for loan losses	692	977
Recoveries	49	53
Balances at end of the period	8,660	4,272
Allowance for loan losses by impairment methodology, Individually evaluated	1,202	0
Allowance for loan losses by impairment methodology, Collectively evaluated	7,458	4,272
Investment in loans, net of unearned income, Individually evaluated	3,392	342
Investment in loans, net of unearned income, Collectively evaluated	536,291	564,341
Total Loans, Net of Unearned Income	539,683	564,683
Consumer loans and overdrafts | Domestic
Allowance for Credit Losses
Loans charged-off	(196)	(19)
Consumer loans and overdrafts | International
Allowance for Credit Losses
Loans charged-off	$ (406)	(400)
As Reported
Allowance for Credit Losses
Balances at beginning of the period		72,000
(Reversal of) provision for loan losses		0
Recoveries		919
Balances at end of the period		72,118
Allowance for loan losses by impairment methodology, Individually evaluated		2,226
Allowance for loan losses by impairment methodology, Collectively evaluated		69,892
Investment in loans, net of unearned income, Individually evaluated		26,635
Investment in loans, net of unearned income, Collectively evaluated		5,923,815
Total Loans, Net of Unearned Income		5,950,450
As Reported | Domestic
Allowance for Credit Losses
Loans charged-off		(401)
As Reported | International
Allowance for Credit Losses
Loans charged-off		(400)
As Reported | Real estate loans
Allowance for Credit Losses
Balances at beginning of the period		30,246
(Reversal of) provision for loan losses		(864)
Recoveries		34
Balances at end of the period		29,416
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		29,416
Investment in loans, net of unearned income, Individually evaluated		11,238
Investment in loans, net of unearned income, Collectively evaluated		2,699,872
Total Loans, Net of Unearned Income		2,711,110
As Reported | Real estate loans | Domestic
Allowance for Credit Losses
Loans charged-off		0
As Reported | Real estate loans | International
Allowance for Credit Losses
Loans charged-off		0
As Reported | Commercial loans
Allowance for Credit Losses
Balances at beginning of the period		33,731
(Reversal of) provision for loan losses		578
Recoveries		832
Balances at end of the period		34,759
Allowance for loan losses by impairment methodology, Individually evaluated		2,226
Allowance for loan losses by impairment methodology, Collectively evaluated		32,533
Investment in loans, net of unearned income, Individually evaluated		15,055
Investment in loans, net of unearned income, Collectively evaluated		2,243,345
Total Loans, Net of Unearned Income		2,258,400
As Reported | Commercial loans | Domestic
Allowance for Credit Losses
Loans charged-off		(382)
As Reported | Commercial loans | International
Allowance for Credit Losses
Loans charged-off		0
As Reported | Loans to financial institutions and acceptances
Allowance for Credit Losses
Balances at beginning of the period		4,362
(Reversal of) provision for loan losses		(691)
Recoveries		0
Balances at end of the period		3,671
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		3,671
Investment in loans, net of unearned income, Individually evaluated		0
Investment in loans, net of unearned income, Collectively evaluated		416,292
Total Loans, Net of Unearned Income		416,292
As Reported | Loans to financial institutions and acceptances | Domestic
Allowance for Credit Losses
Loans charged-off		0
As Reported | Loans to financial institutions and acceptances | International
Allowance for Credit Losses
Loans charged-off		0
As Reported | Consumer loans and overdrafts
Allowance for Credit Losses
Balances at beginning of the period		3,661
(Reversal of) provision for loan losses		977
Recoveries		53
Balances at end of the period		4,272
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		4,272
Investment in loans, net of unearned income, Individually evaluated		342
Investment in loans, net of unearned income, Collectively evaluated		564,306
Total Loans, Net of Unearned Income		564,648
As Reported | Consumer loans and overdrafts | Domestic
Allowance for Credit Losses
Loans charged-off		(19)
As Reported | Consumer loans and overdrafts | International
Allowance for Credit Losses
Loans charged-off		(400)
Effect of change
Allowance for Credit Losses
Balances at beginning of the period		0
(Reversal of) provision for loan losses		0
Recoveries		0
Balances at end of the period		0
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		0
Investment in loans, net of unearned income, Individually evaluated		0
Investment in loans, net of unearned income, Collectively evaluated		0
Total Loans, Net of Unearned Income		0
Effect of change | Domestic
Allowance for Credit Losses
Loans charged-off		0
Effect of change | International
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Real estate loans
Allowance for Credit Losses
Balances at beginning of the period		1,044
(Reversal of) provision for loan losses		43
Recoveries		0
Balances at end of the period		1,087
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		1,087
Investment in loans, net of unearned income, Individually evaluated		0
Investment in loans, net of unearned income, Collectively evaluated		103,522
Total Loans, Net of Unearned Income		103,522
Effect of change | Real estate loans | Domestic
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Real estate loans | International
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Commercial loans
Allowance for Credit Losses
Balances at beginning of the period		(1,044)
(Reversal of) provision for loan losses		(43)
Recoveries		0
Balances at end of the period		(1,087)
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		(1,087)
Investment in loans, net of unearned income, Individually evaluated		0
Investment in loans, net of unearned income, Collectively evaluated		(103,557)
Total Loans, Net of Unearned Income		(103,557)
Effect of change | Commercial loans | Domestic
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Commercial loans | International
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Loans to financial institutions and acceptances
Allowance for Credit Losses
Balances at beginning of the period		0
(Reversal of) provision for loan losses		0
Recoveries		0
Balances at end of the period		0
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		0
Investment in loans, net of unearned income, Individually evaluated		0
Investment in loans, net of unearned income, Collectively evaluated		0
Total Loans, Net of Unearned Income		0
Effect of change | Loans to financial institutions and acceptances | Domestic
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Loans to financial institutions and acceptances | International
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Consumer loans and overdrafts
Allowance for Credit Losses
Balances at beginning of the period		0
(Reversal of) provision for loan losses		0
Recoveries		0
Balances at end of the period		0
Allowance for loan losses by impairment methodology, Individually evaluated		0
Allowance for loan losses by impairment methodology, Collectively evaluated		0
Investment in loans, net of unearned income, Individually evaluated		0
Investment in loans, net of unearned income, Collectively evaluated		35
Total Loans, Net of Unearned Income		35
Effect of change | Consumer loans and overdrafts | Domestic
Allowance for Credit Losses
Loans charged-off		0
Effect of change | Consumer loans and overdrafts | International
Allowance for Credit Losses
Loans charged-off		$ 0

Securities - Amortized Cost to

Securities - Amortized Cost to Fair Value of Available for Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,563,195	$ 1,619,196
Gross Unrealized Gains	8,433	2,913
Gross Unrealized Losses	(20,037)	(36,058)
Estimated Fair Value	1,551,591	1,586,051
U.S. government sponsored enterprise debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	899,571	840,760
Gross Unrealized Gains	4,687	2,197
Gross Unrealized Losses	(13,800)	(22,178)
Estimated Fair Value	890,458	820,779
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	258,421	357,602
Gross Unrealized Gains	1,089	139
Gross Unrealized Losses	(1,168)	(5,186)
Estimated Fair Value	258,342	352,555
U.S. government agency debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	218,813	221,682
Gross Unrealized Gains	362	187
Gross Unrealized Losses	(3,839)	(4,884)
Estimated Fair Value	215,336	216,985
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	162,123	162,438
Gross Unrealized Gains	2,295	390
Gross Unrealized Losses	(430)	(2,616)
Estimated Fair Value	163,988	160,212
Mutual funds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,267	24,266
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(800)	(1,156)
Estimated Fair Value	23,467	23,110
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	0	12,448
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(38)
Estimated Fair Value	$ 0	$ 12,410

Securities - Narrative (Details

Securities - Narrative (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Available for sale	$ 1,551,591,000	$ 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	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	$ 189,717	$ 412,086
12 Months or More, Estimated Fair Value	808,585	935,330
Total, Estimated Fair Value	998,302	1,347,416
Less Than 12 Months, Unrealized Loss	(2,796)	(7,778)
12 Months or More, Unrealized Loss	(17,241)	(28,280)
Total, Unrealized Loss	(20,037)	(36,058)
U.S. government sponsored enterprise debt securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	74,413	90,980
12 Months or More, Estimated Fair Value	524,470	608,486
Total, Estimated Fair Value	598,883	699,466
Less Than 12 Months, Unrealized Loss	(1,995)	(2,995)
12 Months or More, Unrealized Loss	(11,805)	(19,183)
Total, Unrealized Loss	(13,800)	(22,178)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	72,106	243,667
12 Months or More, Estimated Fair Value	75,776	75,762
Total, Estimated Fair Value	147,882	319,429
Less Than 12 Months, Unrealized Loss	(365)	(3,800)
12 Months or More, Unrealized Loss	(803)	(1,386)
Total, Unrealized Loss	(1,168)	(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	48,859	133,886
Total, Estimated Fair Value	48,859	197,466
Less Than 12 Months, Unrealized Loss	0	(939)
12 Months or More, Unrealized Loss	(430)	(3,945)
Total, Unrealized Loss	(430)	(4,884)
U.S. government agency debt securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months, Estimated Fair Value	43,198	1,449
12 Months or More, Estimated Fair Value	136,260	94,331
Total, Estimated Fair Value	179,458	95,780
Less Than 12 Months, Unrealized Loss	(436)	(6)
12 Months or More, Unrealized Loss	(3,403)	(2,610)
Total, Unrealized Loss	(3,839)	(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	23,220	22,865
Total, Estimated Fair Value	23,220	22,865
Less Than 12 Months, Unrealized Loss	0	0
12 Months or More, Unrealized Loss	(800)	(1,156)
Total, Unrealized Loss	(800)	(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	Mar. 31, 2019	Dec. 31, 2018
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 83,909	$ 85,188
Gross Unrealized Gains	101	0
Gross Unrealized Losses	(1,635)	(3,938)
Estimated Fair Value	82,375	81,250
U.S. government sponsored enterprise debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	81,088	82,326
Gross Unrealized Gains	79	0
Gross Unrealized Losses	(1,635)	(3,889)
Estimated Fair Value	79,532	78,437
Corporate debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	2,821	2,862
Gross Unrealized Gains	22	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	Mar. 31, 2019	Dec. 31, 2018
Available for Sale, Amortized Cost
Within 1 year	$ 34,856
After 1 year through 5 years	239,679
After 5 years through 10 years	172,190
After 10 years	1,092,203
No contractual maturities	24,267
Amortized Cost	1,563,195	$ 1,619,196
Available for Sale, Estimated Fair Value
Within 1 year	34,769
After 1 year through 5 years	239,297
After 5 years through 10 years	172,421
After 10 years	1,081,637
No contractual maturities	23,467
Estimated Fair Value	1,551,591	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	83,909
No contractual maturities	0
Amortized Cost	83,909	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	82,375
No contractual maturities	0
Estimated Fair Value	$ 82,375	$ 81,250

Loans - Loan Portfolio by Class

Loans - Loan Portfolio by Classes (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,734,438	$ 5,920,175
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,359,720	4,355,942
Real estate loans | Nonowner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,852,903	1,809,356
Real estate loans | Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	878,239	909,439
Real estate loans | Land development and construction loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	291,416	326,644
Real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,022,558	3,045,439
Real estate loans | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	535,306	533,481
Real estate loans | Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	801,856	777,022
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,239,525	1,380,428
Loans to financial institutions and acceptances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	27,985	68,965
Consumer loans and overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 107,208	$ 114,840

Loans - Narrative (Details)

Loans - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Syndication facilities included in loans	$ 640	$ 807
Cash collateral on loans	18.4	19.5
Loans pledged as collateral	$ 1,289	$ 1,680

Loans - Loan Portfolio by Count

Loans - Loan Portfolio by Countries (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,734,438	$ 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	$ 236,349	$ 299,759
International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	150,535	157,162
International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	85,814	142,597
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,359,720	4,355,942
Real estate loans | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	131,297	135,438
Real estate loans | International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	124,772	128,971
Real estate loans | International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,525	6,467
Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,239,525	1,380,428
Commercial loans | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	63,061	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	63,061	73,636
Loans to financial institutions and acceptances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	27,985	68,965
Loans to financial institutions and acceptances | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,000	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	8,000	49,000
Consumer loans and overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	107,208	114,840
Consumer loans and overdrafts | International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	33,991	41,685
Consumer loans and overdrafts | International | Venezuela
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	25,763	28,191
Consumer loans and overdrafts | International | Others
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 8,228	$ 13,494

Loans - Loans by Delinquency (D

Loans - Loans by Delinquency (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	$ 5,734,438	$ 5,920,175
Current	5,712,561	5,899,259
Past Due	21,877	20,916
Total Loans in Nonaccrual Status	19,769	16,479
Total Loans 90 Days or More Past Due and Accruing	749	1,303
30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	11,948	11,888
60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	4,299	3,801
Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	5,630	5,227
Real estate loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	4,359,720	4,355,942
Current	4,344,252	4,339,045
Past Due	15,468	16,897
Total Loans in Nonaccrual Status	12,371	11,672
Total Loans 90 Days or More Past Due and Accruing	0	419
Real estate loans | 30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	8,210	10,710
Real estate loans | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,466	2,496
Real estate loans | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,792	3,691
Real estate loans | Nonowner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	1,852,903	1,809,356
Current	1,852,903	1,809,356
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 | Nonowner occupied | 30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Nonowner occupied | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Nonowner occupied | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Multi-family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	878,239	909,439
Current	877,574	909,439
Past Due	665	0
Total Loans in Nonaccrual Status	665	0
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Multi-family residential | 30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Multi-family residential | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	665	0
Real estate loans | Multi-family residential | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Land development and construction loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	291,416	326,644
Current	291,416	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, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Land development and construction loans | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Land development and construction loans | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	3,022,558	3,045,439
Current	3,021,893	3,045,439
Past Due	665	0
Total Loans in Nonaccrual Status	665	0
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Commercial real estate | 30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Commercial real estate | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	665	0
Real estate loans | Commercial real estate | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Real estate loans | Single-family residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	535,306	533,481
Current	523,172	519,730
Past Due	12,134	13,751
Total Loans in Nonaccrual Status	6,514	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, Recorded Investment, Past Due [Line Items]
Past Due	7,802	7,910
Real estate loans | Single-family residential | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	921	2,336
Real estate loans | Single-family residential | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,411	3,505
Real estate loans | Owner occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	801,856	777,022
Current	799,187	773,876
Past Due	2,669	3,146
Total Loans in Nonaccrual Status	5,192	4,983
Total Loans 90 Days or More Past Due and Accruing	0	0
Real estate loans | Owner occupied | 30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	408	2,800
Real estate loans | Owner occupied | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,880	160
Real estate loans | Owner occupied | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	381	186
Commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	1,239,525	1,380,428
Current	1,234,890	1,378,022
Past Due	4,635	2,406
Total Loans in Nonaccrual Status	7,361	4,772
Total Loans 90 Days or More Past Due and Accruing	0	0
Commercial loans | 30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	3,151	704
Commercial loans | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	399	1,062
Commercial loans | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	1,085	640
Loans to financial institutions and acceptances
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	27,985	68,965
Current	27,985	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, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Loans to financial institutions and acceptances | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Loans to financial institutions and acceptances | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	0	0
Consumer loans and overdrafts
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans, Net of Unearned Income	107,208	114,840
Current	105,434	113,227
Past Due	1,774	1,613
Total Loans in Nonaccrual Status	37	35
Total Loans 90 Days or More Past Due and Accruing	749	884
Consumer loans and overdrafts | 30-59 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	587	474
Consumer loans and overdrafts | 60-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	434	243
Consumer loans and overdrafts | Greater than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due	$ 753	$ 896

Allowance for Loan Losses - All

Allowance for Loan Losses - Allowances by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Allowance for Credit Losses
Balances at beginning of the period	$ 61,762	$ 72,000
(Reversal of) provision for loan losses	0	0
Recoveries	172	919
Balances at end of the period	60,322	72,118
Allowance for loan losses by impairment methodology, Individually evaluated	2,795	2,226
Allowance for loan losses by impairment methodology, Collectively evaluated	57,527	69,892
Investment in loans, net of unearned income, Individually evaluated	16,428	26,635
Investment in loans, net of unearned income, Collectively evaluated	5,718,010	5,923,815
Total Loans, Net of Unearned Income	5,734,438	5,950,450
Domestic
Allowance for Credit Losses
Loans charged-off	(1,188)	(401)
International
Allowance for Credit Losses
Loans charged-off	(424)	(400)
Real estate loans
Allowance for Credit Losses
Balances at beginning of the period	22,778	31,290
(Reversal of) provision for loan losses	(322)	(821)
Recoveries	0	34
Balances at end of the period	22,456	30,503
Allowance for loan losses by impairment methodology, Individually evaluated	0	0
Allowance for loan losses by impairment methodology, Collectively evaluated	22,456	30,503
Investment in loans, net of unearned income, Individually evaluated	711	11,238
Investment in loans, net of unearned income, Collectively evaluated	3,016,569	2,803,394
Total Loans, Net of Unearned Income	3,017,280	2,814,632
Real estate loans | Domestic
Allowance for Credit Losses
Loans charged-off	0	0
Real estate loans | International
Allowance for Credit Losses
Loans charged-off	0	0
Commercial loans
Allowance for Credit Losses
Balances at beginning of the period	30,018	32,687
(Reversal of) provision for loan losses	(31)	535
Recoveries	123	832
Balances at end of the period	29,100	33,672
Allowance for loan losses by impairment methodology, Individually evaluated	1,593	2,226
Allowance for loan losses by impairment methodology, Collectively evaluated	27,507	31,446
Investment in loans, net of unearned income, Individually evaluated	12,325	15,055
Investment in loans, net of unearned income, Collectively evaluated	2,137,165	2,139,788
Total Loans, Net of Unearned Income	2,149,490	2,154,843
Commercial loans | Domestic
Allowance for Credit Losses
Loans charged-off	(992)	(382)
Commercial loans | International
Allowance for Credit Losses
Loans charged-off	(18)	0
Loans to financial institutions and acceptances
Allowance for Credit Losses
Balances at beginning of the period	445	4,362
(Reversal of) provision for loan losses	(339)	(691)
Recoveries	0	0
Balances at end of the period	106	3,671
Allowance for loan losses by impairment methodology, Individually evaluated	0	0
Allowance for loan losses by impairment methodology, Collectively evaluated	106	3,671
Investment in loans, net of unearned income, Individually evaluated	0	0
Investment in loans, net of unearned income, Collectively evaluated	27,985	416,292
Total Loans, Net of Unearned Income	27,985	416,292
Loans to financial institutions and acceptances | Domestic
Allowance for Credit Losses
Loans charged-off	0	0
Loans to financial institutions and acceptances | International
Allowance for Credit Losses
Loans charged-off	0	0
Consumer loans and overdrafts
Allowance for Credit Losses
Balances at beginning of the period	8,521	3,661
(Reversal of) provision for loan losses	692	977
Recoveries	49	53
Balances at end of the period	8,660	4,272
Allowance for loan losses by impairment methodology, Individually evaluated	1,202	0
Allowance for loan losses by impairment methodology, Collectively evaluated	7,458	4,272
Investment in loans, net of unearned income, Individually evaluated	3,392	342
Investment in loans, net of unearned income, Collectively evaluated	536,291	564,341
Total Loans, Net of Unearned Income	539,683	564,683
Consumer loans and overdrafts | Domestic
Allowance for Credit Losses
Loans charged-off	(196)	(19)
Consumer loans and overdrafts | International
Allowance for Credit Losses
Loans charged-off	$ (406)	$ (400)

Allowance for Loan Losses - Rec

Allowance for Loan Losses - Recorded Investment of Loan Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Impaired [Line Items]
Amount of loan sales	$ 152,177	$ 12,958
Real estate loans
Financing Receivable, Impaired [Line Items]
Amount of loan sales	23,475	2,958
Commercial loans
Financing Receivable, Impaired [Line Items]
Amount of loan sales	126,838	10,000
Loans to financial institutions and acceptances
Financing Receivable, Impaired [Line Items]
Amount of loan sales	0	0
Consumer loans and overdrafts
Financing Receivable, Impaired [Line Items]
Amount of loan sales	$ 1,864	$ 0

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	$ 10,945	$ 7,849
Recorded Investment, Without a Valuation Allowance	5,483	5,609
Recorded Investment, Total	16,428	13,458
Year Average	22,471	25,708
Total Unpaid Principal Balance	17,671	14,776
Valuation Allowance	2,795	2,373
Real estate loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	3,774	3,255
Recorded Investment, Without a Valuation Allowance	5,352	5,450
Recorded Investment, Total	9,126	8,705
Year Average	15,276	18,229
Total Unpaid Principal Balance	9,233	8,750
Valuation Allowance	1,505	1,310
Real estate loans | Nonowner occupied
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	5,188	7,935
Total Unpaid Principal Balance	0	0
Valuation Allowance	0	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	711	717
Recorded Investment, Total	711	717
Year Average	719	724
Total Unpaid Principal Balance	716	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	0	0
Recorded Investment, Without a Valuation Allowance	711	717
Recorded Investment, Total	711	717
Year Average	5,907	8,659
Total Unpaid Principal Balance	716	722
Valuation Allowance	0	0
Real estate loans | Single-family residential
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	3,411	3,086
Recorded Investment, Without a Valuation Allowance	289	306
Recorded Investment, Total	3,700	3,392
Year Average	4,182	4,046
Total Unpaid Principal Balance	3,802	3,427
Valuation Allowance	1,346	1,235
Real estate loans | Owner occupied
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	363	169
Recorded Investment, Without a Valuation Allowance	4,352	4,427
Recorded Investment, Total	4,715	4,596
Year Average	5,187	5,524
Total Unpaid Principal Balance	4,715	4,601
Valuation Allowance	159	75
Commercial loans
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	7,169	4,585
Recorded Investment, Without a Valuation Allowance	120	148
Recorded Investment, Total	7,289	4,733
Year Average	7,178	7,464
Total Unpaid Principal Balance	8,427	6,009
Valuation Allowance	1,289	1,059
Consumer loans and overdrafts
Financing Receivable, Impaired [Line Items]
Recorded Investment, With a Valuation Allowance	2	9
Recorded Investment, Without a Valuation Allowance	11	11
Recorded Investment, Total	13	20
Year Average	17	15
Total Unpaid Principal Balance	11	17
Valuation Allowance	$ 1	$ 4

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Receivables [Abstract]
Interest income recognized on impaired loans	$ 18	$ 25

Allowance for Loan Losses - Cre

Allowance for Loan Losses - Credit Risk Quality (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 5,734,438	$ 5,920,175
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	5,678,007	5,870,758
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	25,044	19,523
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	30,828	29,305
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	559	589
Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans
Financing Receivable, Recorded Investment [Line Items]
Loans	4,359,720	4,355,942
Real estate loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	4,322,857	4,323,581
Real estate loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	21,052	15,580
Real estate loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	15,811	16,781
Real estate loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Nonowner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	1,852,903	1,809,356
Real estate loans | Nonowner occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	1,844,618	1,802,573
Real estate loans | Nonowner occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	8,285	6,561
Real estate loans | Nonowner occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	222
Real estate loans | Nonowner occupied | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Nonowner occupied | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Multi-family residential
Financing Receivable, Recorded Investment [Line Items]
Loans	878,239	909,439
Real estate loans | Multi-family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	877,574	909,439
Real estate loans | Multi-family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans		0
Real estate loans | Multi-family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	665	0
Real estate loans | Multi-family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Multi-family residential | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Land development and construction loans
Financing Receivable, Recorded Investment [Line Items]
Loans	291,416	326,644
Real estate loans | Land development and construction loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	291,416	326,644
Real estate loans | Land development and construction loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Land development and construction loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Land development and construction loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Land development and construction loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	3,022,558	3,045,439
Real estate loans | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	3,013,608	3,038,656
Real estate loans | Commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	8,285	6,561
Real estate loans | Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	665	222
Real estate loans | Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Commercial real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Single-family residential
Financing Receivable, Recorded Investment [Line Items]
Loans	535,306	533,481
Real estate loans | Single-family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	528,792	526,373
Real estate loans | Single-family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Single-family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	6,514	7,108
Real estate loans | Single-family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Single-family residential | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Owner occupied
Financing Receivable, Recorded Investment [Line Items]
Loans	801,856	777,022
Real estate loans | Owner occupied | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	780,457	758,552
Real estate loans | Owner occupied | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	12,767	9,019
Real estate loans | Owner occupied | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	8,632	9,451
Real estate loans | Owner occupied | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real estate loans | Owner occupied | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial loans
Financing Receivable, Recorded Investment [Line Items]
Loans	1,239,525	1,380,428
Commercial loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	1,225,901	1,369,434
Commercial loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	3,992	3,943
Commercial loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	9,073	6,462
Commercial loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	559	589
Commercial loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Loans to financial institutions and acceptances
Financing Receivable, Recorded Investment [Line Items]
Loans	27,985	68,965
Loans to financial institutions and acceptances | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	27,985	68,965
Loans to financial institutions and acceptances | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Loans to financial institutions and acceptances | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Loans to financial institutions and acceptances | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Loans to financial institutions and acceptances | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Consumer loans and overdrafts
Financing Receivable, Recorded Investment [Line Items]
Loans	107,208	114,840
Consumer loans and overdrafts | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	101,264	108,778
Consumer loans and overdrafts | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Consumer loans and overdrafts | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,944	6,062
Consumer loans and overdrafts | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Consumer loans and overdrafts | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 0	$ 0

Time Deposits (Details)

Time Deposits (Details) - USD ($) $ in Millions	Mar. 31, 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
Time deposits, including brokered deposits, less than $100,000	$ 589	$ 642

Advances From the Federal Hom_3

Advances From the Federal Home Loan Bank and Other Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
2019	$ 385,000	$ 440,000
2020	265,000	306,000
2021	210,000	210,000
2022	120,000	120,000
2023 and after	90,000	90,000
Advances from Federal Home Loan Banks	$ 1,070,000	$ 1,166,000
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	2.48%
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%

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	$ 4,991	$ 11,491
Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	4,991	2,388
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	0	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	4,815	1,420
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	4,815	1,420
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Customers | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	4,815	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	4,815	1,420
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	176	685
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	176	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	176	685
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Third Party Broker | Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset	176	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)	3 Months Ended
	Mar. 31, 2019USD ($)instrument	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)instrument
Derivatives, Fair Value [Line Items]
Hedge ineffectiveness gain (loss)	$ 0	$ 0
Derivatives Designated as Hedging Instruments | Interest Rate Swap Contracts
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument			16
Notional amount			$ 280,000,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Swap Contracts | Customers
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	12		8
Notional amount	$ 145,400,000		$ 80,400,000
Derivatives Not Designated as Hedging Instruments | Interest Rate Cap Contracts | Customers
Derivatives, Fair Value [Line Items]
Number of instruments held | instrument	16,000		16
Notional amount	$ 320,800,000		$ 323,700,000

Stock-based Incentive Compens_2

Stock-based Incentive Compensation Plan (Details) - Restricted Stock - Class A common stock - USD ($) $ / shares in Units, $ in Millions	Jan. 21, 2019	Mar. 31, 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)	$ 13.50
Share-based compensation expense		$ 1.5
Nonvested awards, compensation not yet recognized		$ 8.3
Nonvested awards, compensation cost not yet recognized, period		2 years

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	21.49%	13.76%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (“AOCL”) - Componenets of AOCL (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount	$ (2,845)	$ (24,042)
Tax Effect	696	5,878
Net of Tax Amount	(2,149)	(18,164)
Unrealized losses on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount	(11,604)	(33,145)
Tax Effect	2,838	8,104
Net of Tax Amount	(8,766)	(25,041)
Unrealized gains on interest rate swaps designated as cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount	8,759	9,103
Tax Effect	(2,142)	(2,226)
Net of Tax Amount	$ 6,617	$ 6,877

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss (“AOCL”) - Components of Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Before Tax Amount
Total other comprehensive (loss) income, Before Tax Amount	$ 21,197	$ (14,628)
Tax Effect
Total other comprehensive (loss) income, Tax Effect	(5,182)	4,021
Net of Tax Amount
Reclassification adjustment for net (gains) losses included in net income, Net of Tax Amount	(252)	90
Other comprehensive income (loss)	16,015	(10,607)
Unrealized gains (losses) on available for sale securities:
Before Tax Amount
Change in fair value arising during the period, Before Tax Amount	21,545	(20,850)
Reclassification adjustment for net (gains) losses included in net income, Before Tax Amount	(4)	0
Total other comprehensive (loss) income, Before Tax Amount	21,541	(20,850)
Tax Effect
Change in fair value arising during the period, Tax Effect	(5,267)	5,873
Reclassification adjustment for net (gains) losses included in net income, Tax Effect	1	0
Total other comprehensive (loss) income, Tax Effect	(5,266)	5,873
Net of Tax Amount
Change in fair value arising during the period, Net of Tax Amount	16,278	(14,977)
Reclassification adjustment for net (gains) losses included in net income, Net of Tax Amount	(3)	0
Other comprehensive income (loss)	16,275	(14,977)
Unrealized (losses) gains on interest rate swaps designated as cash flow hedges:
Before Tax Amount
Change in fair value arising during the period, Before Tax Amount	(15)	6,101
Reclassification adjustment for net (gains) losses included in net income, Before Tax Amount	(329)	121
Total other comprehensive (loss) income, Before Tax Amount	(344)	6,222
Tax Effect
Change in fair value arising during the period, Tax Effect	4	(1,821)
Reclassification adjustment for net (gains) losses included in net income, Tax Effect	80	(31)
Total other comprehensive (loss) income, Tax Effect	84	(1,852)
Net of Tax Amount
Change in fair value arising during the period, Net of Tax Amount	(11)	4,280
Reclassification adjustment for net (gains) losses included in net income, Net of Tax Amount	(249)	90
Other comprehensive income (loss)	$ (260)	$ 4,370

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	Mar. 31, 2019	Mar. 31, 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
	Mar. 31, 2019	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 1.6	$ 1.4

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Off-Balance Sheet Credit Risk (Details) $ in Thousands	Mar. 31, 2019USD ($)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	$ 1,107,910
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	884,142
Credit card facilities
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	196,901
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	24,278
Commercial letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Approximate Contract Amount	$ 2,589

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Securities available for sale
Securities available for sale	$ 1,551,591	$ 1,586,051
Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	1,551,591	1,586,051
Bank owned life insurance	207,546	206,141
Derivative instruments	4,991	11,491
Assets, fair value	1,764,128	1,803,683
Liabilities
Derivative instruments	4,991	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	1,551,591	1,586,051
Bank owned life insurance	207,546	206,141
Derivative instruments	4,991	11,491
Assets, fair value	1,764,128	1,803,683
Liabilities
Derivative instruments	4,991	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	890,458	820,779
U.S. government sponsored enterprise debt securities | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	890,458	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	890,458	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	258,342	352,555
Corporate debt securities | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	258,342	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	258,342	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	215,336	216,985
U.S. government agency debt securities | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	215,336	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	215,336	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	163,988	160,212
Municipal bonds | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	163,988	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	163,988	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	23,467	23,110
Mutual funds | Fair Value, Measurements, Recurring
Securities available for sale
Securities available for sale	23,467	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	23,467	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
Commercial paper
Securities available for sale
Securities available for sale	$ 0	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	3 Months Ended
	Mar. 31, 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	9,968
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	Mar. 31, 2019	Dec. 31, 2018
Carrying Value
Financial assets
Loans	$ 2,792,815	$ 2,850,015
Financial liabilities
Time deposits	1,770,303	1,745,025
Advances from the FHLB	1,070,000	1,166,000
Junior subordinated debentures	118,110	118,110
Estimated Fair Value
Financial assets
Loans	2,670,693	2,739,721
Financial liabilities
Time deposits	1,772,212	1,740,752
Advances from the FHLB	1,074,596	1,167,213
Junior subordinated debentures	$ 114,620	$ 99,450

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended
	Jan. 31, 2019	Dec. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income available to common stockholders			$ 13,071	$ 9,429
Basic weighted average shares outstanding (in shares)			42,755,000	42,489,000
Dilutive effect of share-based compensation awards (in shares)			159,000	0
Diluted weighted average shares outstanding (in shares)			42,914,000	42,489,000
Basic earnings per common share (in dollars per share)			$ 0.31	$ 0.22
Diluted earnings per common share (in dollars per share)			$ 0.30	$ 0.22
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

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Statement:
Net interest income	$ 55,437	$ 52,633
(Reversal of) provision for loan losses	0	0
Net interest income after provision for loan losses	55,437	52,633
Noninterest income	13,156	13,945
Noninterest expense	51,945	55,645
Net income (loss) before income tax:
Net income before income tax	16,648	10,933
Income tax expense	(3,577)	(1,504)
Net income	13,071	9,429
Balance Sheets
Loans, net	5,684,084
Loans, net	5,674,116		$ 5,858,413
Deposits	5,888,188		6,032,686
Loans held for sale	9,968		0
Operating Segments
Income Statement:
Net interest income	55,437	52,633
(Reversal of) provision for loan losses	0	0
Net interest income after provision for loan losses	55,437	52,633
Noninterest income	13,156	13,945
Noninterest expense	51,945	55,645
Net income (loss) before income tax:
Net income before income tax	16,648	10,933
Segment Reconciling Items
Net income (loss) before income tax:
Net income before income tax	0	0
Personal and Commercial Banking (PAC)
Net income (loss) before income tax:
Net income before income tax	15,847	14,564
Income tax expense	(3,785)	(2,221)
Net income	12,062	12,343
Balance Sheets
Loans, net	5,711,728
Loans, net			5,845,266
Deposits	5,224,837		5,339,099
Loans held for sale	10,000
Personal and Commercial Banking (PAC) | Operating Segments
Income Statement:
Net interest income	50,044	46,681
(Reversal of) provision for loan losses	(709)	(2,139)
Net interest income after provision for loan losses	50,753	48,820
Noninterest income	5,210	5,708
Noninterest expense	40,878	40,014
Net income (loss) before income tax:
Net income before income tax	15,085	14,514
Personal and Commercial Banking (PAC) | Segment Reconciling Items
Net income (loss) before income tax:
Net income before income tax	762	50
Corporate LATAM
Net income (loss) before income tax:
Net income before income tax	309	1,122
Income tax expense	(74)	(171)
Net income	235	951
Balance Sheets
Loans, net	28,500
Loans, net			69,755
Deposits	19,079		16,293
Corporate LATAM | Operating Segments
Income Statement:
Net interest income	162	1,480
(Reversal of) provision for loan losses	(517)	(719)
Net interest income after provision for loan losses	679	2,199
Noninterest income	74	109
Noninterest expense	449	1,175
Net income (loss) before income tax:
Net income before income tax	304	1,133
Corporate LATAM | Segment Reconciling Items
Net income (loss) before income tax:
Net income before income tax	5	(11)
Treasury
Net income (loss) before income tax:
Net income before income tax	639	61
Income tax expense	420	312
Net income	1,059	373
Balance Sheets
Loans, net	0
Loans, net			0
Deposits	607,830		642,106
Treasury | Operating Segments
Income Statement:
Net interest income	403	956
(Reversal of) provision for loan losses	(358)	(117)
Net interest income after provision for loan losses	761	1,073
Noninterest income	3,005	1,950
Noninterest expense	3,127	2,962
Net income (loss) before income tax:
Net income before income tax	639	61
Treasury | Segment Reconciling Items
Net income (loss) before income tax:
Net income before income tax	0	0
Institutional
Net income (loss) before income tax:
Net income before income tax	(147)	(4,814)
Income tax expense	(138)	576
Net income	(285)	(4,238)
Balance Sheets
Loans, net	(56,144)
Loans, net			(56,608)
Deposits	36,442		$ 35,188
Institutional | Operating Segments
Income Statement:
Net interest income	4,828	3,516
(Reversal of) provision for loan losses	1,584	2,975
Net interest income after provision for loan losses	3,244	541
Noninterest income	4,867	6,178
Noninterest expense	7,491	11,494
Net income (loss) before income tax:
Net income before income tax	620	(4,775)
Institutional | Segment Reconciling Items
Net income (loss) before income tax:
Net income before income tax	$ (767)	$ (39)