Meridian Bancorp (EBSB) 10-Q 9 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 01, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	EBSB
Title of 12(b) Security	Common Stock
Security Exchange Name	NASDAQ
Entity Registrant Name	Meridian Bancorp, Inc.
Entity Central Index Key	0001600125
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity File Number	001-36573
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	46-5396964
Entity Address, Address Line One	67 Prospect Street
Entity Address, City or Town	Peabody
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01960
City Area Code	617
Local Phone Number	567-1500
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		53,322,477

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 361,050,000	$ 371,995,000
Certificates of deposit	5,247,000	5,247,000
Securities available for sale, at fair value	16,500,000	17,159,000
Marketable equity securities, at fair value	14,776,000	13,437,000
Federal Home Loan Bank stock, at cost	27,469,000	29,187,000
Loans held for sale	2,105,000	409,000
Loans, net of deferred fees and costs	5,819,237,000	5,646,634,000
Less: allowance for loan losses	(53,865,000)	(53,231,000)
Loans, net	5,765,372,000	5,593,403,000
Bank-owned life insurance	41,295,000	40,734,000
Premises and equipment, net	66,280,000	45,140,000
Accrued interest receivable	15,436,000	14,267,000
Deferred tax asset, net	18,301,000	18,196,000
Goodwill	20,378,000	20,378,000
Core deposit intangible	2,385,000	2,653,000
Other assets	11,978,000	6,478,000
Total assets	6,368,572,000	6,178,683,000
Deposits:
Non interest-bearing	505,679,000	483,777,000
Interest-bearing	4,512,625,000	4,400,407,000
Total deposits	5,018,304,000	4,884,184,000
Short-term borrowings	0	50,000,000
Long-term debt	600,088,000	536,880,000
Accrued expenses and other liabilities	54,479,000	32,965,000
Total liabilities	5,672,871,000	5,504,029,000
Stockholders' equity:
Preferred stock, $0.01 par value, 50,000,000 shares authorized; none issued
Common stock, $0.01 par value, 100,000,000 shares authorized; 53,321,805 and 53,541,429 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	533,000	535,000
Additional paid-in capital	375,760,000	378,583,000
Retained earnings	336,628,000	313,521,000
Accumulated other comprehensive loss	(24,000)	(348,000)
Unearned compensation - ESOP, 2,374,390 and 2,435,272 shares at June 30, 2019 and December 31, 2018, respectively	(17,196,000)	(17,637,000)
Total stockholders' equity	695,701,000	674,654,000
Total liabilities and stockholders' equity	$ 6,368,572,000	$ 6,178,683,000

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	53,321,805	53,541,429
Common stock, shares outstanding	53,321,805	53,541,429
Unearned compensation, ESOP	2,374,390	2,435,272

Consolidated Statements of Net

Consolidated Statements of Net Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest and dividend income:
Interest and fees on loans	$ 64,040	$ 53,904	$ 125,681	$ 103,889
Interest on debt securities:
Taxable	108	126	218	252
Tax-exempt	13	15	26	30
Dividends on equity securities	142	134	247	282
Interest on certificates of deposit	28	141	55	344
Other interest and dividend income	1,943	1,527	4,520	3,049
Total interest and dividend income	66,274	55,847	130,747	107,846
Interest expense:
Interest on deposits	20,653	12,751	39,804	23,260
Interest on short-term borrowings			295
Interest on borrowings	3,151	2,049	5,581	3,691
Total interest expense	23,804	14,800	45,680	26,951
Net interest income	42,470	41,047	85,067	80,895
Provision for loan losses	78	1,870	921	4,059
Net interest income, after provision for loan losses	42,392	39,177	84,146	76,836
Non-interest income:
Customer service fees	2,288	2,282	4,385	4,452
Loan fees	53	(158)	130	137
Mortgage banking gains, net	101	63	141	196
Gain (loss) on marketable equity securities, net	223	388	1,549	(149)
Income from bank-owned life insurance	280	277	561	549
Other income	9	6	16	6
Total non-interest income	2,954	2,858	6,782	5,191
Non-interest expenses:
Salaries and employee benefits	14,916	14,438	30,548	29,832
Occupancy and equipment	3,650	3,025	7,246	6,564
Data processing	2,009	1,653	3,979	3,336
Marketing and advertising	1,299	1,006	2,461	1,973
Professional services	784	1,000	1,644	1,965
Deposit insurance	929	782	1,941	1,579
Merger and acquisition		14		88
Other general and administrative	1,530	1,547	3,094	2,817
Total non-interest expenses	25,117	23,465	50,913	48,154
Income before income taxes	20,229	18,570	40,015	33,873
Provision for income taxes	5,061	4,508	9,776	7,817
Net income	$ 15,168	$ 14,062	$ 30,239	$ 26,056
Earnings per share:
Basic	$ 0.30	$ 0.27	$ 0.59	$ 0.51
Diluted	$ 0.29	$ 0.27	$ 0.59	$ 0.49
Weighted average shares outstanding:
Basic	51,051,880	51,437,726	51,086,050	51,484,521
Diluted	51,511,678	52,867,787	51,489,608	52,975,541

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 15,168	$ 14,062	$ 30,239	$ 26,056
Other comprehensive income (loss):
Net unrealized gain (loss) on securities available for sale	194	(117)	450	(498)
Tax effect	(54)	38	(126)	174
Total other comprehensive income (loss)	140	(79)	324	(324)
Comprehensive income	$ 15,308	$ 13,983	$ 30,563	$ 25,732

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Unearned Compensation - ESOP [Member]
Beginning Balance at Dec. 31, 2017	$ 646,399	$ 540	$ 395,716	$ 268,533	$ 128	$ (18,518)
Beginning balance, shares at Dec. 31, 2017		54,039,316
Cumulative effect of adopting AccountingStandards Update 2016-01				499	(499)
Comprehensive income (loss)	11,749			11,994	(245)
Dividends declared	(2,576)			(2,576)
Repurchased stock related to buyback program	(1,996)	$ (1)	(1,995)
Repurchased stock related to buyback program, shares		(100,000)
ESOP shares committed to be allocated	625		405			220
Share-based compensation expense - restricted stock, net of awards forfeited	716		716
Share-based compensation expense - restricted stock, net of awards forfeited, shares		(3,190)
Share-based compensation expense - stock options, net of awards forfeited	415		415
Stock options exercised	275	$ 1	274
Stock options exercised, shares		132,748
Ending Balance at Mar. 31, 2018	655,607	$ 540	395,531	278,450	(616)	(18,298)
Ending balance, shares at Mar. 31, 2018		54,068,874
Beginning Balance at Dec. 31, 2017	646,399	$ 540	395,716	268,533	128	(18,518)
Beginning balance, shares at Dec. 31, 2017		54,039,316
Comprehensive income (loss)	25,732
Ending Balance at Jun. 30, 2018	664,666	$ 539	392,955	289,949	(699)	(18,078)
Ending balance, shares at Jun. 30, 2018		53,905,279
Beginning Balance at Mar. 31, 2018	655,607	$ 540	395,531	278,450	(616)	(18,298)
Beginning balance, shares at Mar. 31, 2018		54,068,874
Cumulative effect of adopting AccountingStandards Update 2016-01				4	(4)
Comprehensive income (loss)	13,983			14,062	(79)
Dividends declared	(2,567)			(2,567)
Repurchased stock related to buyback program	(4,065)	$ (2)	(4,063)
Repurchased stock related to buyback program, shares		(214,010)
ESOP shares committed to be allocated	594		374			220
Share-based compensation expense - restricted stock, net of awards forfeited	696		696
Share-based compensation expense - restricted stock, net of awards forfeited, shares		(2,360)
Share-based compensation expense - stock options, net of awards forfeited	407		407
Stock options exercised	11	$ 1	10
Stock options exercised, shares		52,775
Ending Balance at Jun. 30, 2018	664,666	$ 539	392,955	289,949	(699)	(18,078)
Ending balance, shares at Jun. 30, 2018		53,905,279
Beginning Balance at Dec. 31, 2018	$ 674,654	$ 535	378,583	313,521	(348)	(17,637)
Beginning balance, shares at Dec. 31, 2018	53,541,429	53,541,429
Comprehensive income (loss)	$ 15,255			15,071	184
Dividends declared	(3,569)			(3,569)
Repurchased stock related to buyback program	(1,647)	$ (1)	(1,646)
Repurchased stock related to buyback program, shares		(104,177)
ESOP shares committed to be allocated	479		258			221
Share-based compensation expense - restricted stock, net of awards forfeited	681		681
Share-based compensation expense - restricted stock, net of awards forfeited, shares		(455)
Share-based compensation expense - stock options, net of awards forfeited	407		407
Shares surrendered related to tax withholdings on stock options exercised	(71)		(71)
Shares surrendered related to tax withholdings on stock options exercised, shares		(4,458)
Stock options exercised	199	$ 1	198
Stock options exercised, shares		110,307
Ending Balance at Mar. 31, 2019	686,388	$ 535	378,410	325,023	(164)	(17,416)
Ending balance, shares at Mar. 31, 2019		53,542,646
Beginning Balance at Dec. 31, 2018	$ 674,654	$ 535	378,583	313,521	(348)	(17,637)
Beginning balance, shares at Dec. 31, 2018	53,541,429	53,541,429
Comprehensive income (loss)	$ 30,563
Ending Balance at Jun. 30, 2019	$ 695,701	$ 533	375,760	336,628	(24)	(17,196)
Ending balance, shares at Jun. 30, 2019	53,321,805	53,321,805
Beginning Balance at Mar. 31, 2019	$ 686,388	$ 535	378,410	325,023	(164)	(17,416)
Beginning balance, shares at Mar. 31, 2019		53,542,646
Comprehensive income (loss)	15,308			15,168	140
Dividends declared	(3,563)			(3,563)
Repurchased stock related to buyback program	(4,075)	$ (2)	(4,073)
Repurchased stock related to buyback program, shares		(236,842)
ESOP shares committed to be allocated	520		300			220
Share-based compensation expense - restricted stock, net of awards forfeited	689		689
Share-based compensation expense - restricted stock, net of awards forfeited, shares		11,820
Share-based compensation expense - stock options, net of awards forfeited	411		411
Stock options exercised	23		23
Stock options exercised, shares		4,181
Ending Balance at Jun. 30, 2019	$ 695,701	$ 533	$ 375,760	$ 336,628	$ (24)	$ (17,196)
Ending balance, shares at Jun. 30, 2019	53,321,805	53,321,805

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018
Dividends declared per share	$ 0.07	$ 0.07	$ 0.05	$ 0.05
ESOP shares earned	30,441	30,441	30,441	30,441
Common Stock [Member]
Dividends declared per share	$ 0.07	$ 0.07	$ 0.05	$ 0.05
ESOP shares earned	30,441	30,441	30,441	30,441
Additional Paid-in Capital [Member]
Dividends declared per share	$ 0.07	$ 0.07	$ 0.05	$ 0.05
ESOP shares earned	30,441	30,441	30,441	30,441
Retained Earnings [Member]
Dividends declared per share	$ 0.07	$ 0.07	$ 0.05	$ 0.05
ESOP shares earned	30,441	30,441	30,441	30,441
Accumulated Other Comprehensive Income (Loss) [Member]
Dividends declared per share	$ 0.07	$ 0.07	$ 0.05	$ 0.05
ESOP shares earned	30,441	30,441	30,441	30,441
Unearned Compensation - ESOP [Member]
Dividends declared per share	$ 0.07	$ 0.07	$ 0.05	$ 0.05
ESOP shares earned	30,441	30,441	30,441	30,441

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 30,239	$ 26,056
Adjustments to reconcile net income to net cash provided by operating activities:
Net amortization of acquisition fair value adjustments	34	77
Amortization of core deposit intangible	268	295
ESOP shares expense	999	1,219
Provision for loan losses	921	4,059
Accretion of net deferred loan origination fees	(1,000)	(779)
Net amortization of securities available for sale	21	24
Depreciation and amortization expense	1,560	1,485
(Gain) loss on marketable equity securities, net	(1,549)	149
Deferred income tax benefit	(231)	(478)
Income from bank-owned life insurance	(561)	(549)
Share-based compensation expense	2,188	2,234
Net changes in:
Loans held for sale	(1,696)	2,720
Accrued interest receivable	(1,169)	203
Other assets	(5,500)	(5,911)
Accrued expenses and other liabilities	2,747	(53)
Net cash provided by operating activities	27,271	30,751
Cash flows from investing activities:
Purchases of certificates of deposit		(5,000)
Maturities of certificates of deposit		50,441
Activity in securities, at fair value:
Proceeds from maturities, calls and principal payments	1,075	1,630
Proceeds from sales	223	2,961
Purchases		(763)
Loans originated, net of principal payments received	(171,933)	(495,426)
Purchases of premises and equipment	(3,934)	(2,061)
Purchase of Federal Home Loan Bank stock	(1,092)	(4,599)
Redemption of Federal Home Loan Bank stock	2,810
Net cash used in investing activities	(172,851)	(452,817)
Cash flows from financing activities:
Net increase in deposits	134,129	281,661
Net change in borrowings with maturities less than three months	(50,000)
Proceeds from Federal Home Loan Bank advances with maturities of three months or more	120,000	305,000
Repayment of Federal Home Loan Bank advances with maturities of three months or more	(56,792)	(226,769)
Cash dividends paid on common stock	(7,131)	(5,150)
Stock options exercised, net of cash paid in connection with income taxes	151	286
Repurchase of common stock	(5,722)	(6,061)
Net cash provided by financing activities	134,635	348,967
Net change in cash and cash equivalents	(10,945)	(73,099)
Cash and cash equivalents at beginning of period	371,995	402,687
Cash and cash equivalents at end of period	361,050	329,588
Supplemental cash flow information:
Interest paid on deposits	38,934	22,746
Interest paid on borrowings	5,562	3,508
Income taxes paid, net of refunds	$ 11,485	$ 14,379

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1 . The consolidated financial statements include the accounts of Meridian Bancorp, Inc. (the “Company”) and all other entities in which it has a controlling financial interest. The Company owns 100% of the outstanding shares of East Boston Savings Bank (the “Bank”). The Bank’s subsidiaries include: (1) Prospect, Inc., which engages in securities transactions on its own behalf; (2) EBOSCO, LLC, which can hold foreclosed real estate; and (3) East Boston Investment Services, Inc., which is authorized for third-party investment sales and is currently inactive. All significant intercompany balances and transactions have been eliminated in consolidation. The accompanying unaudited interim consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by such generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation have been included. Such adjustments were of a normal recurring nature. The results of operations for the three and six months ended June 30, 2019 are not necessarily indicative of the results that may be expected for the entire year or any other interim period. For additional information, refer to the financial statements and footnotes thereto of the Company included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, which was filed with the Securities and Exchange Commission (“SEC”) on March 1, 2019, and is available through the SEC’s website at www.sec.gov In preparing consolidated financial statements in conformity with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reported period. Actual results could differ from those estimates. A material estimate that is particularly susceptible to significant change in the near term relates to the determination of the allowance for loan losses.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	2. RECENT ACCOUNTING PRONOUNCEMENTS Adopted During the Period In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2016-02, Leases (Topic 842). This update is intended to improve financial reporting about leasing transactions and the key provision impacting the Company is the requirement for a lessee to record a right-to-use asset and liability representing the obligation to make lease payments for long-term operating leases. ASU 2016-02 became effective for the Company on January 1, 2019. The Company recorded an $18.8 million right-to-use lease asset and an obligation to make payment liability, representing the present value of future minimum lease payments, in premises and equipment, net and accrued expenses and other liabilities, respectively. To be Adopted in Future Periods In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326). The main objective of this update is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments, including loans, held-to-maturity debt securities and commitments to extend credit held by a reporting entity at each reporting date. To achieve this objective, the amendments in this update replace the incurred loss impairment methodology in current GAAP with a methodology, referred to as Current Expected Credit Loss, or CECL, that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to formulate credit loss estimates. Credit losses on available-for-sale debt securities will be measured in a manner similar to current GAAP, but will be recognized through an allowance rather than as a direct write-down. This update will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is executing a project plan to facilitate the implementation of CECL. This plan considers enhancements to internal controls, loan pool segmentation, loan loss estimation methodology, data gathering resources, data analytics and necessary disclosures. The adoption of this ASU may result in material changes to the allowance for loan losses with a resulting adjustment to retained earnings; however, any potential adjustment will depend on the credit risks within the portfolio and the economic environment at the time of adoption. In January 2017, the FASB issued ASU No. 2017-04, Intangibles — Goodwill and Other (Topic 350). The update intends to simplify the subsequent measurement of goodwill by requiring an entity to compare the fair value of a reporting unit to its carrying value, including goodwill. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the impairment charge should not exceed the total amount of goodwill allocated to that reporting unit. This update will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The adoption of this ASU is not expected to be material to the Company’s results of operations or financial position. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820). The update modifies the disclosure requirements primarily related to level 3 fair value measurements of the fair value hierarchy. This update will be effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. As the update primarily relates to disclosure requirements, the Company does not expect the adoption of this ASU to have a material impact on the Company’s results of operation or financial position.

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	3. EARNINGS PER SHARE Basic earnings per share excludes dilution and is calculated by dividing net income available to common stockholders by the weighted-average number of common shares outstanding during the period. Rights to dividends on unvested stock awards are non-forfeitable, therefore these unvested stock awards are considered outstanding in the computation of basic earnings per share. Diluted earnings per share is computed in a manner similar to that of basic earnings per share except that the weighted-average number of common shares outstanding is increased to include the number of incremental common shares (computed using the treasury method) that would have been outstanding if all potentially dilutive common stock equivalents (such as options) were issued during the period. Unallocated common shares held by the ESOP are shown as a reduction in stockholders’ equity and are not included in the weighted-average number of common shares outstanding for either basic or diluted earnings per share calculations. Basic and diluted earnings per share have been computed based on the following: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (Dollars in thousands, except per share amounts) Net income available to common stockholders $ 15,168 $ 14,062 $ 30,239 $ 26,056 Basic weighted average shares outstanding 51,051,880 51,437,726 51,086,050 51,484,521 Effect of dilutive stock options 459,798 1,430,061 403,558 1,491,020 Diluted weighted average shares outstanding 51,511,678 52,867,787 51,489,608 52,975,541 Earnings per share: Basic $ 0.30 $ 0.27 $ 0.59 $ 0.51 Diluted $ 0.29 $ 0.27 $ 0.59 $ 0.49 For the three months ended June 30, 2019 and 2018, options for the exercise of 121,608 shares and 63,629 shares, respectively, were not included in the calculation of diluted earnings per share because to do so would have been anti-dilutive. For the six months ended June 30, 2019 and 2018, options for the exercise of 131,068 shares and 48,493 shares, respectively, were not included in the calculation of diluted earnings per share because to do so would have been anti-dilutive An anti-dilutive option exists when the average stock price for the period is less than the exercise price of the option.

Securities

Securities	6 Months Ended
	Jun. 30, 2019
Investments Debt And Equity Securities [Abstract]
Securities	4. SECURITIES Securities Available for Sale The amortized cost and fair values of securities available for sale, with gross unrealized gains and losses, follows: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value (In thousands) June 30, 2019 Debt securities: Government-sponsored enterprises $ 1,810 $ 41 $ — $ 1,851 Municipal bonds 2,089 44 — 2,133 Residential mortgage-backed securities: Government-sponsored enterprises 11,715 154 (78 ) 11,791 Private label 628 97 — 725 Total securities available for sale $ 16,242 $ 336 $ (78 ) $ 16,500 December 31, 2018 Debt securities: Government-sponsored enterprises $ 1,869 $ 5 $ (42 ) $ 1,832 Municipal bonds 2,094 — (63 ) 2,031 Residential mortgage-backed securities: Government-sponsored enterprises 12,749 85 (249 ) 12,585 Private label 639 76 (4 ) 711 Total debt securities $ 17,351 $ 166 $ (358 ) $ 17,159 At June 30, 2019, debt securities with a fair value of $2.4 million and $296,000 were pledged as collateral for Federal Home Loan Bank of Boston (“FHLB”) borrowings and for the Federal Reserve Bank discount window borrowings, respectively. The amortized cost and fair value of debt securities by contractual maturity at June 30, 2019 are as follows. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without prepayment penalties. After One Year Through Five Years After Five Years Total Amortized Fair Amortized Fair Amortized Fair Cost Value Cost Value Cost Value (In thousands) Government-sponsored enterprises $ — $ — $ 1,810 $ 1,851 $ 1,810 $ 1,851 Municipal bonds 277 285 1,812 1,848 2,089 2,133 Residential mortgage-backed securities: Government-sponsored enterprises 677 675 11,038 11,116 11,715 11,791 Private label — — 628 725 628 725 Total $ 954 $ 960 $ 15,288 $ 15,540 $ 16,242 $ 16,500 Information pertaining to securities available for sale as of June 30, 2019 and December 31, 2018, with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows: Less Than Twelve Months Twelve Months or Longer Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (In thousands) June 30, 2019 Debt securities: Government-sponsored enterprises $ — $ — $ — $ — Municipal bonds — — — — Residential mortgage-backed securities: Government-sponsored enterprises — — 78 4,778 Private label — — — — Total temporarily impaired securities $ — $ — $ 78 $ 4,778 Less Than Twelve Months Twelve Months or Longer Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (In thousands) December 31, 2018 Debt securities: Government-sponsored enterprises $ 42 $ 1,832 $ — $ — Municipal bonds 28 1,267 35 764 Residential mortgage-backed securities: Government-sponsored enterprises 247 8,479 $ 2 $ 159 Private label 4 163 — — Total temporarily impaired securities $ 321 $ 11,741 $ 37 $ 923 The Company determined no debt securities were other-than-temporarily impaired for the six months ended June 30, 2019 and 2018. Management evaluates debt securities for other-than-temporary impairment on a quarterly basis, with more frequent evaluation for selected issuers or when economic or market concerns warrant such evaluations. Marketable Equity Securities Marketable equity securities consist of common stocks and money market mutual funds. The Company held equity securities with an aggregate fair value of $14.8 million and $13.4 million at June 30, 2019 and December 31, 2018, respectively. The following is a summary of unrealized and realized gains and losses recognized in net income on marketable equity securities during the three and six months ended June 30, 2019: Three Months Ended Six Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 (In thousands) Net realized (losses) gains on marketable equity securities sold during the period $ (155 ) $ — $ (155 ) $ 154 Net unrealized gains (losses) recognized during the reporting period on marketable equity securities still held at the reporting date 378 388 1,704 (303 ) Net gains (losses) recognized during the period on marketable equity securities $ 223 $ 388 $ 1,549 $ (149 )

Loans

Loans	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Loans	5. LOANS A summary of loans follows: June 30, 2019 December 31, 2018 Amount Percent Amount Percent (Dollars in thousands) Real estate loans: Residential real estate: One- to four-family $ 668,997 11.5 % $ 647,367 11.4 % Home equity lines of credit 60,040 1.0 50,087 0.9 Multi-family 1,061,839 18.2 1,010,521 17.9 Commercial real estate 2,647,033 45.4 2,621,979 46.4 Construction 748,457 12.9 686,948 12.1 Total real estate loans 5,186,366 89.0 5,016,902 88.7 Commercial and industrial 627,718 10.8 625,018 11.1 Consumer 11,445 0.2 10,953 0.2 Total loans 5,825,529 100.0 % 5,652,873 100.0 % Allowance for loan losses (53,865 ) (53,231 ) Net deferred loan origination fees (6,292 ) (6,239 ) Loans, net $ 5,765,372 $ 5,593,403 The Company has transferred a portion of its originated commercial real estate loans to participating lenders. The amounts transferred have been accounted for as sales and are therefore not included in the Company’s accompanying balance sheets. The Company and participating lenders share ratably in any gains or losses that may result from a borrower’s lack of compliance with contractual terms of the loan. The Company continues to service the loans on behalf of the participating lenders and, as such, collects cash payments from the borrowers, remits payments to participating lenders and disburses required escrow funds to relevant parties. At June 30, 2019 and December 31, 2018, the Company was servicing loans for participants aggregating $202.8 million and $197.9 million, respectively. At June 30, 2019, multi-family and commercial real estate loans with carrying values totaling $306.4 million and $857.8 million, respectively, were pledged as collateral for FHLB borrowings. An analysis of the allowance for loan losses and related information follows: Three Months Ended June 30, 2019 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at March 31, 2019 $ 897 $ 8,382 $ 61 $ 28,194 $ 10,020 $ 6,353 $ 90 $ 53,997 Provision (credit) for loan losses (62 ) 211 4 (413 ) 234 71 33 78 Charge-offs — — — — — (186 ) (60 ) (246 ) Recoveries — — 1 5 — — 30 36 Balance at June 30, 2019 $ 835 $ 8,593 $ 66 $ 27,786 $ 10,254 $ 6,238 $ 93 $ 53,865 Three Months Ended June 30, 2018 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at March 31, 2018 $ 925 $ 6,989 $ 62 $ 23,873 $ 9,581 $ 5,978 $ 80 $ 47,488 Provision (credit) for loan losses 23 419 — 1,415 (417 ) 389 41 1,870 Charge-offs — — — — — — (79 ) (79 ) Recoveries 68 — 1 5 — — 48 122 Balance at June 30, 2018 $ 1,016 $ 7,408 $ 63 $ 25,293 $ 9,164 $ 6,367 $ 90 $ 49,401 Six Months Ended June 30, 2019 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at December 31, 2018 $ 1,033 $ 8,240 $ 70 $ 27,785 $ 9,755 $ 6,236 $ 112 $ 53,231 Provision (credit) for loan losses (198 ) 353 (6 ) (4 ) 499 198 79 921 Charge-offs — — — — — (196 ) (137 ) (333 ) Recoveries — — 2 5 — — 39 46 Balance at June 30, 2019 $ 835 $ 8,593 $ 66 $ 27,786 $ 10,254 $ 6,238 $ 93 $ 53,865 Six Months Ended June 30, 2018 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at December 31, 2017 $ 1,001 $ 6,263 $ 62 $ 21,513 $ 10,166 $ 6,084 $ 96 $ 45,185 Provision (credit) for loan losses (53 ) 1,145 (1 ) 3,770 (1,177 ) 283 92 4,059 Charge-offs — — — — — — (159 ) (159 ) Recoveries 68 — 2 10 175 — 61 316 Balance at June 30, 2018 $ 1,016 $ 7,408 $ 63 $ 25,293 $ 9,164 $ 6,367 $ 90 $ 49,401 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) June 30, 2019 Amount of allowance for loan losses for loans deemed to be impaired $ 35 $ — $ — $ — $ — $ — $ — $ 35 Amount of allowance for loan losses for loans not deemed to be impaired 800 8,593 66 27,786 10,254 6,238 93 53,830 $ 835 $ 8,593 $ 66 $ 27,786 $ 10,254 $ 6,238 $ 93 $ 53,865 Loans deemed to be impaired $ 1,136 $ 930 $ — $ 751 $ — $ 1,150 $ — $ 3,967 Loans not deemed to be impaired 667,861 1,060,909 60,040 2,646,282 748,457 626,568 11,445 5,821,562 $ 668,997 $ 1,061,839 $ 60,040 $ 2,647,033 $ 748,457 $ 627,718 $ 11,445 $ 5,825,529 December 31, 2018 Amount of allowance for loan losses for loans deemed to be impaired $ 45 $ 65 $ — $ — $ — $ — $ — $ 110 Amount of allowance for loan losses for loans not deemed to be impaired 988 8,175 70 27,785 9,755 6,236 112 53,121 $ 1,033 $ 8,240 $ 70 $ 27,785 $ 9,755 $ 6,236 $ 112 $ 53,231 Loans deemed to be impaired $ 1,190 $ 1,271 $ — $ 784 $ — $ 1,548 $ — $ 4,793 Loans not deemed to be impaired 646,177 1,009,250 50,087 2,621,195 686,948 623,470 10,953 5,648,080 $ 647,367 $ 1,010,521 $ 50,087 $ 2,621,979 $ 686,948 $ 625,018 $ 10,953 $ 5,652,873 The following table provides information about the Company’s past due and non-accrual loans: 30-59 60-89 90 Days Days Days or Greater Total Loans on Past Due Past Due Past Due Past Due Non-accrual (In thousands) June 30, 2019 Real estate loans: Residential real estate: One- to four-family $ 285 $ 119 $ 2,040 $ 2,444 $ 5,378 Commercial real estate — — — — 318 Total real estate loans 285 119 2,040 2,444 5,696 Commercial and industrial — — 350 350 350 Consumer 845 656 — 1,501 — Total $ 1,130 $ 775 $ 2,390 $ 4,295 $ 6,046 December 31, 2018 Real estate loans: Residential real estate: One- to four-family $ 877 $ 462 $ 2,458 $ 3,797 $ 5,888 Home equity lines of credit 524 — — 524 — Multi-family 176 — — 176 — Commercial real estate — 90 161 251 342 Total real estate loans 1,577 552 2,619 4,748 6,230 Commercial and industrial 214 — 515 729 676 Consumer 887 588 — 1,475 — Total $ 2,678 $ 1,140 $ 3,134 $ 6,952 $ 6,906 At June 30, 2019 and December 31, 2018, the Company did not have any accruing loans past due 90 days or more. The following tables provide information with respect to the Company’s impaired loans: June 30, 2019 December 31, 2018 Unpaid Unpaid Recorded Principal Related Recorded Principal Related Investment Balance Allowance Investment Balance Allowance (In thousands) Impaired loans without a valuation allowance: One- to four-family $ 774 $ 1,110 $ 653 $ 982 Multi-family 930 930 44 44 Commercial real estate 751 751 784 784 Commercial and industrial 1,150 1,666 1,548 1,878 Total 3,605 4,457 3,029 3,688 Impaired loans with a valuation allowance: One- to four-family 362 362 $ 35 537 537 $ 45 Multi-family — — — 1,227 1,227 65 Total 362 362 35 1,764 $ 1,764 110 Total impaired loans $ 3,967 $ 4,819 $ 35 $ 4,793 $ 5,452 $ 110 Three Months Ended June 30, 2019 2018 Interest Interest Average Interest Income Average Interest Income Recorded Income Recognized Recorded Income Recognized Investment Recognized on Cash Basis Investment Recognized on Cash Basis (In thousands) One- to four-family $ 1,297 $ 13 $ 8 $ 1,374 $ 13 $ 10 Multi-family 1,112 16 — 1,298 13 — Commercial real estate 758 9 4 824 9 4 Commercial and industrial 1,351 16 — 1,486 14 — Total impaired loans $ 4,518 $ 54 $ 12 $ 4,982 $ 49 $ 14 Six Months Ended June 30, 2019 2018 Interest Interest Average Interest Income Average Interest Income Recorded Income Recognized Recorded Income Recognized Investment Recognized on Cash Basis Investment Recognized on Cash Basis (In thousands) One- to four-family $ 1,304 $ 21 $ 12 $ 1,379 $ 27 $ 22 Multi-family 1,168 34 — 1,304 26 — Commercial real estate 766 17 7 831 19 10 Commercial and industrial 1,416 32 — 1,505 29 — Total impaired loans $ 4,654 $ 104 $ 19 $ 5,019 $ 101 $ 32 The following table summarizes the Company’s troubled debt restructurings (“TDRs”) at the dates indicated: June 30, December 31, 2019 2018 (In thousands) TDRs on accrual status: One- to four-family $ 2,118 $ 2,152 Multi-family 930 1,271 Commercial real estate — 8,906 Commercial and industrial — 12 Total TDRs on accrual status 3,048 12,341 TDRs on non-accrual status: One- to four-family 722 770 Total TDRs on non-accrual status 722 770 Total TDRs $ 3,770 $ 13,111 The Company generally places loans modified as TDRs on non-accrual status for a minimum period of six months. Loans modified as TDRs qualify for return to accrual status once they have demonstrated performance with the modified terms of the loan agreement for a minimum of six consecutive months and future payments are reasonably assured. TDRs are initially reported as impaired loans with an allowance established as part of the allocated component of the allowance for loan losses when the discounted cash flows of the impaired loan is lower than the carrying value of that loan. TDRs may be removed from impairment disclosures in the year following the restructure if the borrower demonstrates compliance with the modified terms and the restructuring agreement specifies an interest rate equal to that which would be provided to a borrower with similar credit at the time of restructuring. The Company utilizes a ten-grade internal loan rating system for multi-family, commercial real estate, construction, and commercial and industrial loans as follows: • Loans rated 1 - 6: Loans in these categories are considered “pass” rated loans with low to average risk. • Loans rated 7: Loans in these categories are considered “special mention.” These loans are starting to show signs of potential weakness and are being closely monitored by management. • Loans rated 8: Loans in this category are considered “substandard.” Generally, a loan is considered substandard if it is inadequately protected by the current net worth, generation of cash flows, and paying capacity of the obligors and/or the collateral pledged. There is a distinct possibility that the Company will sustain some loss if the weakness is not corrected. • Loans rated 9: Loans in this category are considered “doubtful.” Loans classified as doubtful have all the weaknesses inherent in those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, highly questionable and improbable. • Loans rated 10: Loans in this category are considered uncollectible (“loss”) and of such little value that their continuance as loans is not warranted. On an annual basis, or more often if needed, the Company formally reviews the ratings on multi-family, commercial real estate, construction, and commercial and industrial loans. The Company also engages an independent third-party to review a significant portion of loans within these segments on at least an annual basis. Management uses the results of these reviews as part of its annual review process. The following table provides the Company’s risk-rated loans by class: June 30, 2019 December 31, 2018 Multi-family Commercial Multi-family Commercial residential Commercial and residential Commercial and real estate real estate Construction industrial real estate real estate Construction industrial (In thousands) Loans rated 1 - 6 $ 1,058,471 $ 2,627,998 $ 748,457 $ 589,908 $ 1,006,295 $ 2,604,771 $ 686,948 $ 587,658 Loans rated 7 — 18,283 — 10,825 — 16,424 — 10,100 Loans rated 8 3,368 752 — 26,985 4,226 784 — 27,260 Loans rated 9 — — — — — — — — Loans rated 10 — — — — — — — — Total $ 1,061,839 $ 2,647,033 $ 748,457 $ 627,718 $ 1,010,521 $ 2,621,979 $ 686,948 $ 625,018 For one- to four-family residential real estate loans, home equity lines of credit and consumer loans, management uses delinquency reports as the key credit quality indicator.

Deposits

Deposits	6 Months Ended
	Jun. 30, 2019
Banking And Thrift [Abstract]
Deposits	6. DEPOSITS A summary of deposit balances, by type, follows: June 30, December 31, 2019 2018 (In thousands) Noninterest-bearing demand deposits $ 505,679 $ 483,777 Interest-bearing demand deposits 1,161,835 1,190,346 Money market deposits 675,452 729,174 Regular savings and other deposits 986,112 794,813 Total non-certificate accounts 3,329,078 3,198,110 Term certificates less than $250,000 1,302,415 1,267,935 Term certificates $250,000 and greater 386,811 418,139 Total certificate accounts 1,689,226 1,686,074 Total deposits $ 5,018,304 $ 4,884,184 A summary of term certificates, by maturity, follows: June 30, 2019 December 31, 2018 Weighted Weighted Maturing Amount Average Rate Amount Average Rate (Dollars in thousands) Within 1 year $ 1,232,000 2.18 % $ 1,043,283 1.98 % Over 1 year to 2 years 395,466 2.09 485,028 2.18 Over 2 years to 3 years 23,263 1.74 96,591 2.01 Over 3 years to 4 years 30,778 2.61 47,926 2.37 Over 4 years to 5 years 7,719 1.77 13,246 2.21 $ 1,689,226 2.16 % $ 1,686,074 2.05 % The Company had certificate of deposit accounts obtained through a listing service, included in term certificates in the table above, totaling $35.4 million with a weighted average rate of 2.58% and $54.8 million with a weighted average rate of 2.37% at June 30, 2019 and December 31, 2018, respectively. The Company had brokered certificates of deposit, which are included in term certificates in the table above, totaling $479.5 million with a weighted average rate of 2.26% and $413.8 million with a weighted average rate of 2.20% at June 30, 2019 and December 31, 2018, respectively. In addition, the Company had $150.4 million and $150.2 million in brokered interest-bearing demand deposits at June 30, 2019 and December 31, 2018, respectively, and $60.0 million in brokered savings accounts at June 30, 2019.

Borrowings

Borrowings	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Borrowings	7. BORROWINGS The Company had no short-term borrowings at June 30, 2019. At December 31, 2018, short-term borrowings consisted of an FHLB advance totaling $50.0 million with a rate of 2.66% and an original maturity of less than one year. The Company has an available line of credit of $9.4 million with the FHLB at an interest rate that adjusts daily and $296,000 of borrowing capacity at the Federal Reserve Bank discount window. No amounts were drawn on the line of credit and no borrowings were outstanding with the Federal Reserve Bank discount window as of June 30, 2019 or December 31, 2018. Long-term debt consists of FHLB advances as follows: June 30, 2019 December 31, 2018 Weighted Weighted Amount Average Rate Amount Average Rate (Dollars in thousands) Fixed rate advances maturing: 2019 $ 3,104 2.06 % $ 4,160 1.86 % 2020 136,359 2.29 67,095 2.38 2021 25,000 1.70 25,000 1.70 2022 110,625 1.97 105,625 1.79 2023 275,000 3.10 75,000 2.50 2024 20,000 2.61 — — Thereafter 10,000 1.21 20,000 1.36 580,088 2.58 296,880 2.07 Variable rate advances maturing: 2023 20,000 1.60 220,000 1.17 2024 — — — — Thereafter — — 20,000 1.75 20,000 1.60 240,000 1.22 Total advances $ 600,088 2.55 % $ 536,880 1.69 % At June 30, 2019, advances totaling $360.0 million, with a weighted average rate of 2.80%, are callable by the FHLB prior to maturity, including variable rate advances totaling $20.0 million, with a weighted average rate of 1.60%. Variable rate advances adjust based on the following: June 30, 2019 December 31, 2018 (Dollars in thousands) Variable rate advances adjusting during the first year: 3 Month Libor less 100bp $ 20,000 $ 45,000 3 Month Libor less 125bp — 25,000 3 Month Libor less 130bp — 85,000 3 Month Libor less 200bp — 50,000 3 Month Libor less 230bp — 15,000 20,000 220,000 Variable rate advances adjusting during the first two years: 3 Month Libor less 100bp — 20,000 — 20,000 Total variable rate advances $ 20,000 $ 240,000 All borrowings from the FHLB are secured by investment securities and qualified collateral, consisting of a blanket lien on one- to four-family loans and certain multi-family and commercial real estate loans held in the Company’s portfolio. At June 30, 2019, the Company pledged multi-family and commercial real estate loans with carrying values totaling $306.4 million and $857.8 million, respectively.

Commitments and Contingencies a

Commitments and Contingencies and Derivatives	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies and Derivatives	8. COMMITMENTS AND CONTINGENCIES AND DERIVATIVES In the normal course of business, there are outstanding commitments and contingencies which are not reflected in the accompanying consolidated financial statements. Loan Commitments The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. The instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the accompanying consolidated balance sheets. The contract amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments. The Company’s exposure to credit loss in the event of nonperformance by the counterparty to the financial instrument for loan commitments is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments as it does for on-balance sheet instruments. A summary of outstanding loan commitments whose contract amounts represent credit risk is as follows: June 30, December 31, 2019 2018 (In thousands) Unadvanced portion of existing loans: Construction $ 496,507 $ 559,139 Home equity lines of credit 72,108 56,323 Other lines and letters of credit 359,857 311,842 Commitments to originate: One- to four-family 30,769 20,226 Commercial real estate 51,239 82,810 Construction 153,051 182,207 Commercial and industrial 12,355 7,460 Total loan commitments outstanding $ 1,175,886 $ 1,220,007 Commitments to originate loans are agreements to lend to a customer provided there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since a portion of the commitments are expected to expire without being drawn upon, the total commitments do not necessarily represent future cash requirements. The Company evaluates each customer’s credit worthiness on a case by case basis. The amount of collateral obtained, if deemed necessary by the Company for the extension of credit, is based upon management’s credit evaluation of the borrower. Collateral held includes, but is not limited to, residential real estate and deposit accounts. Unfunded commitments under lines of credit are commitments for possible future extensions of credit to existing customers. These lines of credit are collateralized if deemed necessary and usually do not contain a specified maturity date and may not be drawn upon to the total extent to which the Company is committed. Letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Those letters of credit are primarily issued to support borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. Interest Rate Swaps The Company is a party to interest rate derivatives that are not designated as hedging instruments. These derivatives relate to interest rate swaps that the Company enters into with commercial business customers to synthetically convert their loans from a variable rate to a fixed rate. The Company pays interest to the customer at a floating rate on the notional amount and receives interest from the customer at a fixed rate for the same notional amount. Concurrently, the Company enters into an offsetting interest rate swap with a third party financial institution. In the offsetting swap, the Company pays the other financial institution interest at the same fixed rate on the same notional amount as the swap entered into with the customer, and receives interest from the financial institution for the same floating rate on the same notional amount. The changes in the fair value of the swaps offset each other, except for the credit risk of the counterparties, which is determined by taking into consideration the risk rating and probability of default. At June 30, 2019, the Company had $4.2 million in cash pledged for collateral on its interest rate swaps with the third-party financial institution. At December 31, 2018, the Company had no cash pledged for collateral on its interest rate swaps with the third-party financial institution. Summary information regarding these derivatives is presented below: June 30, 2019 December 31, 2018 Maturity Interest Rate Paid Interest Rate Received Notional Amount Fair Value Asset (Liability) Notional Amount Fair Value Asset (Liability) (Dollars in thousands) Customer interest rate swap 06/07/32 1 Mo. Libor + 200bp Fixed (4.40%) $ 63,219 $ 3,117 $ 64,004 $ (1,310 ) Third-party interest rate swap 06/07/32 Fixed (4.40%) 1 Mo. Libor + 200bp 63,219 (3,117 ) 64,004 1,310 Customer interest rate swap 10/17/33 1 Mo. Libor + 175bp Fixed (4.1052%) $ 10,316 $ 908 $ 10,458 $ 471 Third-party interest rate swap 10/17/33 Fixed (4.1052%) 1 Mo. Libor + 175bp 10,316 (908 ) 10,458 (471 ) Customer interest rate swap 12/13/26 1 Mo. Libor + 205bp Fixed (3.82%) $ 2,644 $ 9 $ 2,725 $ (109 ) Third-party interest rate swap 12/13/26 Fixed (3.82%) 1 Mo. Libor + 205bp 2,644 (9 ) 2,725 109 Other Commitments As of June 30, 2019, the Company has an outstanding commitment of $10.8 million with its core data processing provider through December 2021. Employment and Change in Control Agreements The Company has entered into employment agreements with certain senior executives which provide for a minimum annual salary, subject to increase at the discretion of the Board of Directors, and other benefits, including a severance payment in the event employment is terminated in conjunction with a defined change in control. The agreements may be terminated for cause by the Company without further liability on the part of the Company, or by the executives with prior written notice to the Board of Directors. The Company also has change in control agreements with several officers which provide a severance payment in the event employment is terminated in conjunction with a defined change in control. Legal Claims Various legal claims may arise from time to time in the normal course of business, but in the opinion of management, these claims are not expected to have a material effect on the Company’s consolidated financial statements.

Fair Values of Assets and Liabi

Fair Values of Assets and Liabilities	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Values of Assets and Liabilities	9. FAIR VALUES OF ASSETS AND LIABILITIES Determination of Fair Value The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The fair value of assets and liabilities is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various assets and liabilities. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the asset or liability. The following methods and assumptions were used by the Company in estimating fair value disclosures: Securities, at fair value Loan level interest rate swaps Assets and Liabilities Measured at Fair Value on a Recurring Basis Assets measured at fair value on a recurring basis are summarized as follows. There were no liabilities measured at fair value on a recurring basis. Total Fair Level 1 Level 2 Level 3 Value (In thousands) June 30, 2019 Assets: Debt securities $ — $ 16,500 $ — $ 16,500 Marketable equity securities 14,776 — — 14,776 Loan level interest rate swaps — — 4,034 4,034 Total assets $ 14,776 $ 16,500 $ 4,034 $ 35,310 Liabilities: Loan level interest rate swaps $ — $ — $ 4,034 $ 4,034 Total liabilities $ — $ — $ 4,034 $ 4,034 Total Fair Level 1 Level 2 Level 3 Value (In thousands) December 31, 2018 Assets: Debt securities $ — $ 17,159 $ — $ 17,159 Marketable equity securities 13,437 — — 13,437 Loan level interest rate swaps — — 1,890 1,890 Total assets $ 13,437 $ 17,159 $ 1,890 $ 32,486 Liabilities: Loan level interest rate swaps $ — $ — $ 1,890 $ 1,890 Total liabilities $ — $ — $ 1,890 $ 1,890 Assets Measured at Fair Value on a Non-recurring Basis The Company may also be required, from time to time, to measure certain other assets at fair value on a non-recurring basis in accordance with generally accepted accounting principles. These adjustments to fair value usually result from the application of lower-of-cost-or market accounting or write-downs of individual assets. Certain impaired loans were adjusted to fair value, less cost to sell, of the underlying collateral securing these loans resulting in losses. The loss is not recorded directly as an adjustment to current earnings, but rather as a component in determining the allowance for loan losses. Fair value was measured using appraised values of collateral and adjusted as necessary by management based on unobservable inputs for specific properties. Impaired loans measured at fair value at June 30, 2019 and December 31, 2018 were $1.7 million and $2.1 million, respectively. The related gains and losses were immaterial for the three and six months ended June 30, 2019 and 2018. Summary of Fair Values of Financial Instruments The estimated fair values, and related carrying amounts, of the Company’s financial instruments are as follows. Certain financial instruments and all nonfinancial instruments are exempt from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein do not represent the underlying fair value of the Company. Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (In thousands) June 30, 2019 Financial assets: Cash and due from banks $ 361,050 $ 361,050 $ — $ — $ 361,050 Certificates of deposit 5,247 — 5,249 — 5,249 Securities available for sale, at fair value 16,500 — 16,500 — 16,500 Marketable equity securities, at fair value 14,776 14,776 — — 14,776 Federal Home Loan Bank stock 27,469 — — 27,469 27,469 Loans and loans held for sale, net 5,767,477 — — 5,730,926 5,730,926 Accrued interest receivable 15,436 — — 15,436 15,436 Loan level interest rate swaps 4,034 — — 4,034 4,034 Financial liabilities: Deposits 5,018,304 — — 5,061,528 5,061,528 Borrowings 600,088 — 610,462 — 610,462 Accrued interest payable 4,581 — — 4,581 4,581 Loan level interest rate swaps 4,034 — — 4,034 4,034 Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (In thousands) December 31, 2018 Financial assets: Cash and due from banks $ 371,995 $ 371,995 $ — $ — $ 371,995 Certificates of deposit 5,247 — 5,303 — 5,303 Securities available for sale, at fair value 17,159 — 17,159 — 17,159 Marketable equity securities, at fair value 13,437 13,437 — — 13,437 Federal Home Loan Bank stock 29,187 — — 29,187 29,187 Loans and loans held for sale, net 5,593,812 — — 5,489,521 5,489,521 Accrued interest receivable 14,267 — — 14,267 14,267 Loan level interest rate swaps 1,890 — — 1,890 1,890 Financial liabilities: Deposits 4,884,184 — — 4,714,313 4,714,313 Borrowings 586,880 — 582,861 — 582,861 Accrued interest payable 3,388 — — 3,388 3,388 Loan level interest rate swaps 1,890 — — 1,890 1,890

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	Adopted During the Period In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2016-02, Leases (Topic 842). This update is intended to improve financial reporting about leasing transactions and the key provision impacting the Company is the requirement for a lessee to record a right-to-use asset and liability representing the obligation to make lease payments for long-term operating leases. ASU 2016-02 became effective for the Company on January 1, 2019. The Company recorded an $18.8 million right-to-use lease asset and an obligation to make payment liability, representing the present value of future minimum lease payments, in premises and equipment, net and accrued expenses and other liabilities, respectively. To be Adopted in Future Periods In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326). The main objective of this update is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments, including loans, held-to-maturity debt securities and commitments to extend credit held by a reporting entity at each reporting date. To achieve this objective, the amendments in this update replace the incurred loss impairment methodology in current GAAP with a methodology, referred to as Current Expected Credit Loss, or CECL, that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to formulate credit loss estimates. Credit losses on available-for-sale debt securities will be measured in a manner similar to current GAAP, but will be recognized through an allowance rather than as a direct write-down. This update will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is executing a project plan to facilitate the implementation of CECL. This plan considers enhancements to internal controls, loan pool segmentation, loan loss estimation methodology, data gathering resources, data analytics and necessary disclosures. The adoption of this ASU may result in material changes to the allowance for loan losses with a resulting adjustment to retained earnings; however, any potential adjustment will depend on the credit risks within the portfolio and the economic environment at the time of adoption. In January 2017, the FASB issued ASU No. 2017-04, Intangibles — Goodwill and Other (Topic 350). The update intends to simplify the subsequent measurement of goodwill by requiring an entity to compare the fair value of a reporting unit to its carrying value, including goodwill. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the impairment charge should not exceed the total amount of goodwill allocated to that reporting unit. This update will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The adoption of this ASU is not expected to be material to the Company’s results of operations or financial position. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820). The update modifies the disclosure requirements primarily related to level 3 fair value measurements of the fair value hierarchy. This update will be effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. As the update primarily relates to disclosure requirements, the Company does not expect the adoption of this ASU to have a material impact on the Company’s results of operation or financial position.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	Basic and diluted earnings per share have been computed based on the following: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (Dollars in thousands, except per share amounts) Net income available to common stockholders $ 15,168 $ 14,062 $ 30,239 $ 26,056 Basic weighted average shares outstanding 51,051,880 51,437,726 51,086,050 51,484,521 Effect of dilutive stock options 459,798 1,430,061 403,558 1,491,020 Diluted weighted average shares outstanding 51,511,678 52,867,787 51,489,608 52,975,541 Earnings per share: Basic $ 0.30 $ 0.27 $ 0.59 $ 0.51 Diluted $ 0.29 $ 0.27 $ 0.59 $ 0.49

Securities (Tables)

Securities (Tables)	6 Months Ended
	Jun. 30, 2019
Investments Debt And Equity Securities [Abstract]
Amortized Cost and Fair Values of Securities Available for Sale	The amortized cost and fair values of securities available for sale, with gross unrealized gains and losses, follows: Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value (In thousands) June 30, 2019 Debt securities: Government-sponsored enterprises $ 1,810 $ 41 $ — $ 1,851 Municipal bonds 2,089 44 — 2,133 Residential mortgage-backed securities: Government-sponsored enterprises 11,715 154 (78 ) 11,791 Private label 628 97 — 725 Total securities available for sale $ 16,242 $ 336 $ (78 ) $ 16,500 December 31, 2018 Debt securities: Government-sponsored enterprises $ 1,869 $ 5 $ (42 ) $ 1,832 Municipal bonds 2,094 — (63 ) 2,031 Residential mortgage-backed securities: Government-sponsored enterprises 12,749 85 (249 ) 12,585 Private label 639 76 (4 ) 711 Total debt securities $ 17,351 $ 166 $ (358 ) $ 17,159
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	The amortized cost and fair value of debt securities by contractual maturity at June 30, 2019 are as follows. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without prepayment penalties. After One Year Through Five Years After Five Years Total Amortized Fair Amortized Fair Amortized Fair Cost Value Cost Value Cost Value (In thousands) Government-sponsored enterprises $ — $ — $ 1,810 $ 1,851 $ 1,810 $ 1,851 Municipal bonds 277 285 1,812 1,848 2,089 2,133 Residential mortgage-backed securities: Government-sponsored enterprises 677 675 11,038 11,116 11,715 11,791 Private label — — 628 725 628 725 Total $ 954 $ 960 $ 15,288 $ 15,540 $ 16,242 $ 16,500
Schedule of Information Pertaining to Securities Available for Sale	Information pertaining to securities available for sale as of June 30, 2019 and December 31, 2018, with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows: Less Than Twelve Months Twelve Months or Longer Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (In thousands) June 30, 2019 Debt securities: Government-sponsored enterprises $ — $ — $ — $ — Municipal bonds — — — — Residential mortgage-backed securities: Government-sponsored enterprises — — 78 4,778 Private label — — — — Total temporarily impaired securities $ — $ — $ 78 $ 4,778 Less Than Twelve Months Twelve Months or Longer Gross Gross Unrealized Fair Unrealized Fair Losses Value Losses Value (In thousands) December 31, 2018 Debt securities: Government-sponsored enterprises $ 42 $ 1,832 $ — $ — Municipal bonds 28 1,267 35 764 Residential mortgage-backed securities: Government-sponsored enterprises 247 8,479 $ 2 $ 159 Private label 4 163 — — Total temporarily impaired securities $ 321 $ 11,741 $ 37 $ 923
Unrealized and Realized Gains and Losses Recognized in Net Income on Marketable Equity Securities	The following is a summary of unrealized and realized gains and losses recognized in net income on marketable equity securities during the three and six months ended June 30, 2019: Three Months Ended Six Months Ended June 30, 2019 June 30, 2018 June 30, 2019 June 30, 2018 (In thousands) Net realized (losses) gains on marketable equity securities sold during the period $ (155 ) $ — $ (155 ) $ 154 Net unrealized gains (losses) recognized during the reporting period on marketable equity securities still held at the reporting date 378 388 1,704 (303 ) Net gains (losses) recognized during the period on marketable equity securities $ 223 $ 388 $ 1,549 $ (149 )

Loans (Tables)

Loans (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of Loans	A summary of loans follows: June 30, 2019 December 31, 2018 Amount Percent Amount Percent (Dollars in thousands) Real estate loans: Residential real estate: One- to four-family $ 668,997 11.5 % $ 647,367 11.4 % Home equity lines of credit 60,040 1.0 50,087 0.9 Multi-family 1,061,839 18.2 1,010,521 17.9 Commercial real estate 2,647,033 45.4 2,621,979 46.4 Construction 748,457 12.9 686,948 12.1 Total real estate loans 5,186,366 89.0 5,016,902 88.7 Commercial and industrial 627,718 10.8 625,018 11.1 Consumer 11,445 0.2 10,953 0.2 Total loans 5,825,529 100.0 % 5,652,873 100.0 % Allowance for loan losses (53,865 ) (53,231 ) Net deferred loan origination fees (6,292 ) (6,239 ) Loans, net $ 5,765,372 $ 5,593,403
Allowance for Loan Losses	An analysis of the allowance for loan losses and related information follows: Three Months Ended June 30, 2019 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at March 31, 2019 $ 897 $ 8,382 $ 61 $ 28,194 $ 10,020 $ 6,353 $ 90 $ 53,997 Provision (credit) for loan losses (62 ) 211 4 (413 ) 234 71 33 78 Charge-offs — — — — — (186 ) (60 ) (246 ) Recoveries — — 1 5 — — 30 36 Balance at June 30, 2019 $ 835 $ 8,593 $ 66 $ 27,786 $ 10,254 $ 6,238 $ 93 $ 53,865 Three Months Ended June 30, 2018 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at March 31, 2018 $ 925 $ 6,989 $ 62 $ 23,873 $ 9,581 $ 5,978 $ 80 $ 47,488 Provision (credit) for loan losses 23 419 — 1,415 (417 ) 389 41 1,870 Charge-offs — — — — — — (79 ) (79 ) Recoveries 68 — 1 5 — — 48 122 Balance at June 30, 2018 $ 1,016 $ 7,408 $ 63 $ 25,293 $ 9,164 $ 6,367 $ 90 $ 49,401 Six Months Ended June 30, 2019 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at December 31, 2018 $ 1,033 $ 8,240 $ 70 $ 27,785 $ 9,755 $ 6,236 $ 112 $ 53,231 Provision (credit) for loan losses (198 ) 353 (6 ) (4 ) 499 198 79 921 Charge-offs — — — — — (196 ) (137 ) (333 ) Recoveries — — 2 5 — — 39 46 Balance at June 30, 2019 $ 835 $ 8,593 $ 66 $ 27,786 $ 10,254 $ 6,238 $ 93 $ 53,865 Six Months Ended June 30, 2018 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) Balance at December 31, 2017 $ 1,001 $ 6,263 $ 62 $ 21,513 $ 10,166 $ 6,084 $ 96 $ 45,185 Provision (credit) for loan losses (53 ) 1,145 (1 ) 3,770 (1,177 ) 283 92 4,059 Charge-offs — — — — — — (159 ) (159 ) Recoveries 68 — 2 10 175 — 61 316 Balance at June 30, 2018 $ 1,016 $ 7,408 $ 63 $ 25,293 $ 9,164 $ 6,367 $ 90 $ 49,401 One- to four- family Multi- family Home equity lines of credit Commercial real estate Construction Commercial and industrial Consumer Total (In thousands) June 30, 2019 Amount of allowance for loan losses for loans deemed to be impaired $ 35 $ — $ — $ — $ — $ — $ — $ 35 Amount of allowance for loan losses for loans not deemed to be impaired 800 8,593 66 27,786 10,254 6,238 93 53,830 $ 835 $ 8,593 $ 66 $ 27,786 $ 10,254 $ 6,238 $ 93 $ 53,865 Loans deemed to be impaired $ 1,136 $ 930 $ — $ 751 $ — $ 1,150 $ — $ 3,967 Loans not deemed to be impaired 667,861 1,060,909 60,040 2,646,282 748,457 626,568 11,445 5,821,562 $ 668,997 $ 1,061,839 $ 60,040 $ 2,647,033 $ 748,457 $ 627,718 $ 11,445 $ 5,825,529 December 31, 2018 Amount of allowance for loan losses for loans deemed to be impaired $ 45 $ 65 $ — $ — $ — $ — $ — $ 110 Amount of allowance for loan losses for loans not deemed to be impaired 988 8,175 70 27,785 9,755 6,236 112 53,121 $ 1,033 $ 8,240 $ 70 $ 27,785 $ 9,755 $ 6,236 $ 112 $ 53,231 Loans deemed to be impaired $ 1,190 $ 1,271 $ — $ 784 $ — $ 1,548 $ — $ 4,793 Loans not deemed to be impaired 646,177 1,009,250 50,087 2,621,195 686,948 623,470 10,953 5,648,080 $ 647,367 $ 1,010,521 $ 50,087 $ 2,621,979 $ 686,948 $ 625,018 $ 10,953 $ 5,652,873
Past Due and Non Accrual	The following table provides information about the Company’s past due and non-accrual loans: 30-59 60-89 90 Days Days Days or Greater Total Loans on Past Due Past Due Past Due Past Due Non-accrual (In thousands) June 30, 2019 Real estate loans: Residential real estate: One- to four-family $ 285 $ 119 $ 2,040 $ 2,444 $ 5,378 Commercial real estate — — — — 318 Total real estate loans 285 119 2,040 2,444 5,696 Commercial and industrial — — 350 350 350 Consumer 845 656 — 1,501 — Total $ 1,130 $ 775 $ 2,390 $ 4,295 $ 6,046 December 31, 2018 Real estate loans: Residential real estate: One- to four-family $ 877 $ 462 $ 2,458 $ 3,797 $ 5,888 Home equity lines of credit 524 — — 524 — Multi-family 176 — — 176 — Commercial real estate — 90 161 251 342 Total real estate loans 1,577 552 2,619 4,748 6,230 Commercial and industrial 214 — 515 729 676 Consumer 887 588 — 1,475 — Total $ 2,678 $ 1,140 $ 3,134 $ 6,952 $ 6,906
Impaired Loans of Company	The following tables provide information with respect to the Company’s impaired loans: June 30, 2019 December 31, 2018 Unpaid Unpaid Recorded Principal Related Recorded Principal Related Investment Balance Allowance Investment Balance Allowance (In thousands) Impaired loans without a valuation allowance: One- to four-family $ 774 $ 1,110 $ 653 $ 982 Multi-family 930 930 44 44 Commercial real estate 751 751 784 784 Commercial and industrial 1,150 1,666 1,548 1,878 Total 3,605 4,457 3,029 3,688 Impaired loans with a valuation allowance: One- to four-family 362 362 $ 35 537 537 $ 45 Multi-family — — — 1,227 1,227 65 Total 362 362 35 1,764 $ 1,764 110 Total impaired loans $ 3,967 $ 4,819 $ 35 $ 4,793 $ 5,452 $ 110 Three Months Ended June 30, 2019 2018 Interest Interest Average Interest Income Average Interest Income Recorded Income Recognized Recorded Income Recognized Investment Recognized on Cash Basis Investment Recognized on Cash Basis (In thousands) One- to four-family $ 1,297 $ 13 $ 8 $ 1,374 $ 13 $ 10 Multi-family 1,112 16 — 1,298 13 — Commercial real estate 758 9 4 824 9 4 Commercial and industrial 1,351 16 — 1,486 14 — Total impaired loans $ 4,518 $ 54 $ 12 $ 4,982 $ 49 $ 14 Six Months Ended June 30, 2019 2018 Interest Interest Average Interest Income Average Interest Income Recorded Income Recognized Recorded Income Recognized Investment Recognized on Cash Basis Investment Recognized on Cash Basis (In thousands) One- to four-family $ 1,304 $ 21 $ 12 $ 1,379 $ 27 $ 22 Multi-family 1,168 34 — 1,304 26 — Commercial real estate 766 17 7 831 19 10 Commercial and industrial 1,416 32 — 1,505 29 — Total impaired loans $ 4,654 $ 104 $ 19 $ 5,019 $ 101 $ 32
Summary of Troubled Debt Restructurings	The following table summarizes the Company’s troubled debt restructurings (“TDRs”) at the dates indicated: June 30, December 31, 2019 2018 (In thousands) TDRs on accrual status: One- to four-family $ 2,118 $ 2,152 Multi-family 930 1,271 Commercial real estate — 8,906 Commercial and industrial — 12 Total TDRs on accrual status 3,048 12,341 TDRs on non-accrual status: One- to four-family 722 770 Total TDRs on non-accrual status 722 770 Total TDRs $ 3,770 $ 13,111
Risk Rated Loans by Class	The following table provides the Company’s risk-rated loans by class: June 30, 2019 December 31, 2018 Multi-family Commercial Multi-family Commercial residential Commercial and residential Commercial and real estate real estate Construction industrial real estate real estate Construction industrial (In thousands) Loans rated 1 - 6 $ 1,058,471 $ 2,627,998 $ 748,457 $ 589,908 $ 1,006,295 $ 2,604,771 $ 686,948 $ 587,658 Loans rated 7 — 18,283 — 10,825 — 16,424 — 10,100 Loans rated 8 3,368 752 — 26,985 4,226 784 — 27,260 Loans rated 9 — — — — — — — — Loans rated 10 — — — — — — — — Total $ 1,061,839 $ 2,647,033 $ 748,457 $ 627,718 $ 1,010,521 $ 2,621,979 $ 686,948 $ 625,018

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Jun. 30, 2019
Banking And Thrift [Abstract]
Summary of Deposit Balances, by Type	A summary of deposit balances, by type, follows: June 30, December 31, 2019 2018 (In thousands) Noninterest-bearing demand deposits $ 505,679 $ 483,777 Interest-bearing demand deposits 1,161,835 1,190,346 Money market deposits 675,452 729,174 Regular savings and other deposits 986,112 794,813 Total non-certificate accounts 3,329,078 3,198,110 Term certificates less than $250,000 1,302,415 1,267,935 Term certificates $250,000 and greater 386,811 418,139 Total certificate accounts 1,689,226 1,686,074 Total deposits $ 5,018,304 $ 4,884,184
Summary of Term Certificates, by Maturity	A summary of term certificates, by maturity, follows: June 30, 2019 December 31, 2018 Weighted Weighted Maturing Amount Average Rate Amount Average Rate (Dollars in thousands) Within 1 year $ 1,232,000 2.18 % $ 1,043,283 1.98 % Over 1 year to 2 years 395,466 2.09 485,028 2.18 Over 2 years to 3 years 23,263 1.74 96,591 2.01 Over 3 years to 4 years 30,778 2.61 47,926 2.37 Over 4 years to 5 years 7,719 1.77 13,246 2.21 $ 1,689,226 2.16 % $ 1,686,074 2.05 %

Borrowings (Tables)

Borrowings (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-term Debt, FHLB Advances	Long-term debt consists of FHLB advances as follows: June 30, 2019 December 31, 2018 Weighted Weighted Amount Average Rate Amount Average Rate (Dollars in thousands) Fixed rate advances maturing: 2019 $ 3,104 2.06 % $ 4,160 1.86 % 2020 136,359 2.29 67,095 2.38 2021 25,000 1.70 25,000 1.70 2022 110,625 1.97 105,625 1.79 2023 275,000 3.10 75,000 2.50 2024 20,000 2.61 — — Thereafter 10,000 1.21 20,000 1.36 580,088 2.58 296,880 2.07 Variable rate advances maturing: 2023 20,000 1.60 220,000 1.17 2024 — — — — Thereafter — — 20,000 1.75 20,000 1.60 240,000 1.22 Total advances $ 600,088 2.55 % $ 536,880 1.69 %
Schedule of Variable Rate Advances Adjustment	Variable rate advances adjust based on the following: June 30, 2019 December 31, 2018 (Dollars in thousands) Variable rate advances adjusting during the first year: 3 Month Libor less 100bp $ 20,000 $ 45,000 3 Month Libor less 125bp — 25,000 3 Month Libor less 130bp — 85,000 3 Month Libor less 200bp — 50,000 3 Month Libor less 230bp — 15,000 20,000 220,000 Variable rate advances adjusting during the first two years: 3 Month Libor less 100bp — 20,000 — 20,000 Total variable rate advances $ 20,000 $ 240,000

Commitments and Contingencies_2

Commitments and Contingencies and Derivatives (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Loan Commitments Outstanding	A summary of outstanding loan commitments whose contract amounts represent credit risk is as follows: June 30, December 31, 2019 2018 (In thousands) Unadvanced portion of existing loans: Construction $ 496,507 $ 559,139 Home equity lines of credit 72,108 56,323 Other lines and letters of credit 359,857 311,842 Commitments to originate: One- to four-family 30,769 20,226 Commercial real estate 51,239 82,810 Construction 153,051 182,207 Commercial and industrial 12,355 7,460 Total loan commitments outstanding $ 1,175,886 $ 1,220,007
Summary Information Regarding the Derivatives	Summary information regarding these derivatives is presented below: June 30, 2019 December 31, 2018 Maturity Interest Rate Paid Interest Rate Received Notional Amount Fair Value Asset (Liability) Notional Amount Fair Value Asset (Liability) (Dollars in thousands) Customer interest rate swap 06/07/32 1 Mo. Libor + 200bp Fixed (4.40%) $ 63,219 $ 3,117 $ 64,004 $ (1,310 ) Third-party interest rate swap 06/07/32 Fixed (4.40%) 1 Mo. Libor + 200bp 63,219 (3,117 ) 64,004 1,310 Customer interest rate swap 10/17/33 1 Mo. Libor + 175bp Fixed (4.1052%) $ 10,316 $ 908 $ 10,458 $ 471 Third-party interest rate swap 10/17/33 Fixed (4.1052%) 1 Mo. Libor + 175bp 10,316 (908 ) 10,458 (471 ) Customer interest rate swap 12/13/26 1 Mo. Libor + 205bp Fixed (3.82%) $ 2,644 $ 9 $ 2,725 $ (109 ) Third-party interest rate swap 12/13/26 Fixed (3.82%) 1 Mo. Libor + 205bp 2,644 (9 ) 2,725 109

Fair Values of Assets and Lia_2

Fair Values of Assets and Liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Assets Measured at Fair Value on a Recurring Basis	Assets measured at fair value on a recurring basis are summarized as follows. There were no liabilities measured at fair value on a recurring basis. Total Fair Level 1 Level 2 Level 3 Value (In thousands) June 30, 2019 Assets: Debt securities $ — $ 16,500 $ — $ 16,500 Marketable equity securities 14,776 — — 14,776 Loan level interest rate swaps — — 4,034 4,034 Total assets $ 14,776 $ 16,500 $ 4,034 $ 35,310 Liabilities: Loan level interest rate swaps $ — $ — $ 4,034 $ 4,034 Total liabilities $ — $ — $ 4,034 $ 4,034 Total Fair Level 1 Level 2 Level 3 Value (In thousands) December 31, 2018 Assets: Debt securities $ — $ 17,159 $ — $ 17,159 Marketable equity securities 13,437 — — 13,437 Loan level interest rate swaps — — 1,890 1,890 Total assets $ 13,437 $ 17,159 $ 1,890 $ 32,486 Liabilities: Loan level interest rate swaps $ — $ — $ 1,890 $ 1,890 Total liabilities $ — $ — $ 1,890 $ 1,890
Summary of Fair Values of Financial Instruments	Accordingly, the aggregate fair value amounts presented herein do not represent the underlying fair value of the Company. Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (In thousands) June 30, 2019 Financial assets: Cash and due from banks $ 361,050 $ 361,050 $ — $ — $ 361,050 Certificates of deposit 5,247 — 5,249 — 5,249 Securities available for sale, at fair value 16,500 — 16,500 — 16,500 Marketable equity securities, at fair value 14,776 14,776 — — 14,776 Federal Home Loan Bank stock 27,469 — — 27,469 27,469 Loans and loans held for sale, net 5,767,477 — — 5,730,926 5,730,926 Accrued interest receivable 15,436 — — 15,436 15,436 Loan level interest rate swaps 4,034 — — 4,034 4,034 Financial liabilities: Deposits 5,018,304 — — 5,061,528 5,061,528 Borrowings 600,088 — 610,462 — 610,462 Accrued interest payable 4,581 — — 4,581 4,581 Loan level interest rate swaps 4,034 — — 4,034 4,034 Carrying Fair Value Amount Level 1 Level 2 Level 3 Total (In thousands) December 31, 2018 Financial assets: Cash and due from banks $ 371,995 $ 371,995 $ — $ — $ 371,995 Certificates of deposit 5,247 — 5,303 — 5,303 Securities available for sale, at fair value 17,159 — 17,159 — 17,159 Marketable equity securities, at fair value 13,437 13,437 — — 13,437 Federal Home Loan Bank stock 29,187 — — 29,187 29,187 Loans and loans held for sale, net 5,593,812 — — 5,489,521 5,489,521 Accrued interest receivable 14,267 — — 14,267 14,267 Loan level interest rate swaps 1,890 — — 1,890 1,890 Financial liabilities: Deposits 4,884,184 — — 4,714,313 4,714,313 Borrowings 586,880 — 582,861 — 582,861 Accrued interest payable 3,388 — — 3,388 3,388 Loan level interest rate swaps 1,890 — — 1,890 1,890

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	Jun. 30, 2019
Regulatory Assets [Abstract]
Share in East Boston Savings Bank	100.00%

Recent Accounting Pronounceme_3

Recent Accounting Pronouncements - Additional Information (Detail) $ in Millions	Jun. 30, 2019USD ($)
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Right-to-use lease asset	$ 18.8
Lease liability	$ 18.8

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 15,168	$ 14,062	$ 30,239	$ 26,056
Basic weighted average shares outstanding	51,051,880	51,437,726	51,086,050	51,484,521
Effect of dilutive stock options	459,798	1,430,061	403,558	1,491,020
Diluted weighted average shares outstanding	51,511,678	52,867,787	51,489,608	52,975,541
Earnings per share:
Basic	$ 0.30	$ 0.27	$ 0.59	$ 0.51
Diluted	$ 0.29	$ 0.27	$ 0.59	$ 0.49

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock Option [Member]
Schedule of Available-for-sale Securities [Line Items]
Anti-dilutive Options	121,608	63,629	131,068	48,493

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Values of Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Amortized Cost, Total	$ 16,242	$ 17,351
Debt Securities, Gross Unrealized Gains	336	166
Debt Securities, Gross Unrealized Losses	(78)	(358)
Debt Securities, Fair Value	16,500	17,159
Government-sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Amortized Cost, Total	1,810	1,869
Debt Securities, Gross Unrealized Gains	41	5
Debt Securities, Gross Unrealized Losses		(42)
Debt Securities, Fair Value	1,851	1,832
Residential Mortgage-backed Securities, Government - sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Amortized Cost, Total	11,715	12,749
Debt Securities, Gross Unrealized Gains	154	85
Debt Securities, Gross Unrealized Losses	(78)	(249)
Debt Securities, Fair Value	11,791	12,585
Residential Mortgage-backed Securities, Private Label [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Amortized Cost, Total	628	639
Debt Securities, Gross Unrealized Gains	97	76
Debt Securities, Gross Unrealized Losses		(4)
Debt Securities, Fair Value	725	711
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Securities, Amortized Cost, Total	2,089	2,094
Debt Securities, Gross Unrealized Gains	44
Debt Securities, Gross Unrealized Losses		(63)
Debt Securities, Fair Value	$ 2,133	$ 2,031

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporarily impaired debt securities	0	0
Equity securities, at fair value	$ 14,776,000		$ 13,437,000
Federal Reserve Bank Discount Window Borrowings [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities with fair value, pledged as collateral	296,000
Federal Home Loan Bank of Boston Borrowings [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities with fair value, pledged as collateral	$ 2,400,000

Securities - Amortized Cost a_2

Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, After One Year Through Five Years	$ 954
Fair Value, After One Year Through Five Years	960
Amortized Cost, After Five Years	15,288
Fair Value, After Five Years	15,540
Debt Securities, Amortized Cost, Total	16,242	$ 17,351
Fair Value, Total	16,500	17,159
Government-sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, After Five Years	1,810
Fair Value, After Five Years	1,851
Debt Securities, Amortized Cost, Total	1,810	1,869
Fair Value, Total	1,851	1,832
Residential Mortgage-backed Securities, Government - sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, After One Year Through Five Years	677
Fair Value, After One Year Through Five Years	675
Amortized Cost, After Five Years	11,038
Fair Value, After Five Years	11,116
Debt Securities, Amortized Cost, Total	11,715	12,749
Fair Value, Total	11,791	12,585
Residential Mortgage-backed Securities, Private Label [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, After Five Years	628
Fair Value, After Five Years	725
Debt Securities, Amortized Cost, Total	628	639
Fair Value, Total	725	711
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, After One Year Through Five Years	277
Fair Value, After One Year Through Five Years	285
Amortized Cost, After Five Years	1,812
Fair Value, After Five Years	1,848
Debt Securities, Amortized Cost, Total	2,089	2,094
Fair Value, Total	$ 2,133	$ 2,031

Securities - Schedule of Inform

Securities - Schedule of Information Pertaining to Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]
Debt securities, gross unrealized losses, less than twelve months		$ 321
Debt securities, fair value, less than twelve months		11,741
Debt securities, gross unrealized losses, over twelve months	$ 78	37
Debt securities, fair value, over twelve months	4,778	923
Government-sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt securities, gross unrealized losses, less than twelve months		42
Debt securities, fair value, less than twelve months		1,832
Residential Mortgage-backed Securities, Government - sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt securities, gross unrealized losses, less than twelve months		247
Debt securities, fair value, less than twelve months		8,479
Debt securities, gross unrealized losses, over twelve months	78	2
Debt securities, fair value, over twelve months	$ 4,778	159
Residential Mortgage-backed Securities, Private Label [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt securities, gross unrealized losses, less than twelve months		4
Debt securities, fair value, less than twelve months		163
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt securities, gross unrealized losses, less than twelve months		28
Debt securities, fair value, less than twelve months		1,267
Debt securities, gross unrealized losses, over twelve months		35
Debt securities, fair value, over twelve months		$ 764

Securities - Unrealized and Rea

Securities - Unrealized and Realized Gains and Losses Recognized in Net Income on Marketable Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Investments Debt And Equity Securities [Abstract]
Net realized (losses) gains on marketable equity securities sold during the period	$ (155)		$ (155)	$ 154
Net unrealized gains (losses) recognized during the reporting period on marketable equity securities still held at the reporting date	378	$ 388	1,704	(303)
Net gains (losses) recognized during the period on marketable equity securities	$ 223	$ 388	$ 1,549	$ (149)

Loans - Summary of Loans (Detai

Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 5,825,529		$ 5,652,873
Total loans, Percent	100.00%		100.00%
Allowance for loan losses	$ (53,865)	$ (53,997)	$ (53,231)	$ (49,401)	$ (47,488)	$ (45,185)
Net deferred loan origination fees	(6,292)		(6,239)
Loans, net	5,765,372		5,593,403
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 627,718		$ 625,018
Total loans, Percent	10.80%		11.10%
Allowance for loan losses	$ (6,238)	(6,353)	$ (6,236)	(6,367)	(5,978)	(6,084)
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 748,457		$ 686,948
Total loans, Percent	12.90%		12.10%
Allowance for loan losses	$ (10,254)	(10,020)	$ (9,755)	(9,164)	(9,581)	(10,166)
Total Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 5,186,366		$ 5,016,902
Total loans, Percent	89.00%		88.70%
Residential Portfolio Segment [Member] | Multi-Family Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 1,061,839		$ 1,010,521
Total loans, Percent	18.20%		17.90%
Allowance for loan losses	$ (8,593)	(8,382)	$ (8,240)	(7,408)	(6,989)	(6,263)
Residential Portfolio Segment [Member] | One-to Four-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 668,997		$ 647,367
Total loans, Percent	11.50%		11.40%
Allowance for loan losses	$ (835)	(897)	$ (1,033)	(1,016)	(925)	(1,001)
Residential Portfolio Segment [Member] | Home Equity Lines of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 60,040		$ 50,087
Total loans, Percent	1.00%		0.90%
Allowance for loan losses	$ (66)	(61)	$ (70)	(63)	(62)	(62)
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 2,647,033		$ 2,621,979
Total loans, Percent	45.40%		46.40%
Allowance for loan losses	$ (27,786)	(28,194)	$ (27,785)	(25,293)	(23,873)	(21,513)
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, Amount	$ 11,445		$ 10,953
Total loans, Percent	0.20%		0.20%
Allowance for loan losses	$ (93)	$ (90)	$ (112)	$ (90)	$ (80)	$ (96)

Loans - Additional Information

Loans - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)SecurityLoan	Dec. 31, 2018USD ($)SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Servicing loans for participants	$ 202.8	$ 197.9
Number of accruing loans | SecurityLoan	0	0
Loans modified as TDRs on non-accrual status, minimum period	6 months
Loans modified as TDRs qualify for return to accrual status if demonstrated performance with modified terms of loan agreement, minimum period	6 months
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value of loan pledged	$ 857.8
Multi-Family Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value of loan pledged	$ 306.4

Loans - Allowance for Loan Loss

Loans - Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 53,997	$ 47,488	$ 53,231	$ 45,185
Provision (credit) for loan losses	78	1,870	921	4,059
Charge-offs	(246)	(79)	(333)	(159)
Recoveries	36	122	46	316
Ending balance	53,865	49,401	53,865	49,401
Amount of allowance for loan losses for loans deemed to be impaired	35		35		$ 110
Amount of allowance for loan losses for loans not deemed to be impaired	53,830		53,830		53,121
Loans deemed to be impaired	3,967		3,967		4,793
Loans not deemed to be impaired	5,821,562		5,821,562		5,648,080
Total, Amount of allowance impaired	5,825,529		5,825,529		5,652,873
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	28,194	23,873	27,785	21,513
Provision (credit) for loan losses	(413)	1,415	(4)	3,770
Recoveries	5	5	5	10
Ending balance	27,786	25,293	27,786	25,293
Amount of allowance for loan losses for loans not deemed to be impaired	27,786		27,786		27,785
Loans deemed to be impaired	751		751		784
Loans not deemed to be impaired	2,646,282		2,646,282		2,621,195
Total, Amount of allowance impaired	2,647,033		2,647,033		2,621,979
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	90	80	112	96
Provision (credit) for loan losses	33	41	79	92
Charge-offs	(60)	(79)	(137)	(159)
Recoveries	30	48	39	61
Ending balance	93	90	93	90
Amount of allowance for loan losses for loans not deemed to be impaired	93		93		112
Loans not deemed to be impaired	11,445		11,445		10,953
Total, Amount of allowance impaired	11,445		11,445		10,953
Multi-Family Residential Real Estate [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	8,382	6,989	8,240	6,263
Provision (credit) for loan losses	211	419	353	1,145
Ending balance	8,593	7,408	8,593	7,408
Amount of allowance for loan losses for loans deemed to be impaired					65
Amount of allowance for loan losses for loans not deemed to be impaired	8,593		8,593		8,175
Loans deemed to be impaired	930		930		1,271
Loans not deemed to be impaired	1,060,909		1,060,909		1,009,250
Total, Amount of allowance impaired	1,061,839		1,061,839		1,010,521
One-to Four-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Amount of allowance for loan losses for loans deemed to be impaired	35		35		45
One-to Four-Family [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	897	925	1,033	1,001
Provision (credit) for loan losses	(62)	23	(198)	(53)
Recoveries		68		68
Ending balance	835	1,016	835	1,016
Amount of allowance for loan losses for loans deemed to be impaired	35		35		45
Amount of allowance for loan losses for loans not deemed to be impaired	800		800		988
Loans deemed to be impaired	1,136		1,136		1,190
Loans not deemed to be impaired	667,861		667,861		646,177
Total, Amount of allowance impaired	668,997		668,997		647,367
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	61	62	70	62
Provision (credit) for loan losses	4		(6)	(1)
Recoveries	1	1	2	2
Ending balance	66	63	66	63
Amount of allowance for loan losses for loans not deemed to be impaired	66		66		70
Loans not deemed to be impaired	60,040		60,040		50,087
Total, Amount of allowance impaired	60,040		60,040		50,087
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	10,020	9,581	9,755	10,166
Provision (credit) for loan losses	234	(417)	499	(1,177)
Recoveries				175
Ending balance	10,254	9,164	10,254	9,164
Amount of allowance for loan losses for loans not deemed to be impaired	10,254		10,254		9,755
Loans not deemed to be impaired	748,457		748,457		686,948
Total, Amount of allowance impaired	748,457		748,457		686,948
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	6,353	5,978	6,236	6,084
Provision (credit) for loan losses	71	389	198	283
Charge-offs	(186)		(196)
Ending balance	6,238	$ 6,367	6,238	$ 6,367
Amount of allowance for loan losses for loans not deemed to be impaired	6,238		6,238		6,236
Loans deemed to be impaired	1,150		1,150		1,548
Loans not deemed to be impaired	626,568		626,568		623,470
Total, Amount of allowance impaired	$ 627,718		$ 627,718		$ 625,018

Loans - Past Due and Non Accrua

Loans - Past Due and Non Accrual (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 4,295	$ 6,952
Loans on Non-accrual	6,046	6,906
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	350	729
Loans on Non-accrual	350	676
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	2,444	4,748
Loans on Non-accrual	5,696	6,230
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		251
Loans on Non-accrual	318	342
Multi Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		176
One-to Four-Family [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	2,444	3,797
Loans on Non-accrual	5,378	5,888
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		524
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,501	1,475
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,130	2,678
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		214
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	285	1,577
Financing Receivables, 30 to 59 Days Past Due [Member] | Multi Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		176
Financing Receivables, 30 to 59 Days Past Due [Member] | One-to Four-Family [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	285	877
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		524
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	845	887
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	775	1,140
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	119	552
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		90
Financing Receivables, 60 to 89 Days Past Due [Member] | One-to Four-Family [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	119	462
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	656	588
Financing Receivables, 90 Days or Greater Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	2,390	3,134
Financing Receivables, 90 Days or Greater Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	350	515
Financing Receivables, 90 Days or Greater Past Due [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	2,040	2,619
Financing Receivables, 90 Days or Greater Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		161
Financing Receivables, 90 Days or Greater Past Due [Member] | One-to Four-Family [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 2,040	$ 2,458

Loans - Impaired Loans of Compa

Loans - Impaired Loans of Company (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Impaired Loans Without Valuation Allowance, Recorded Investment	$ 3,605		$ 3,605		$ 3,029
Impaired Loans Without Valuation Allowance, Unpaid Principal Balance	4,457		4,457		3,688
Impaired Loans With Valuation Allowance, Recorded Investment	362		362		1,764
Impaired Loans With Valuation Allowance, Unpaid Principal Balance	362		362		1,764
Impaired Loans With Valuation Allowance, Related Allowance	35		35		110
Recorded Investment, Total	3,967		3,967		4,793
Unpaid Principal Balance, Total	4,819		4,819		5,452
Average Recorded Investment	4,518	$ 4,982	4,654	$ 5,019
Interest Income Recognized	54	49	104	101
Interest Income Recognized on Cash Basis	12	14	19	32
One-to Four-Family [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans Without Valuation Allowance, Recorded Investment	774		774		653
Impaired Loans Without Valuation Allowance, Unpaid Principal Balance	1,110		1,110		982
Impaired Loans With Valuation Allowance, Recorded Investment	362		362		537
Impaired Loans With Valuation Allowance, Unpaid Principal Balance	362		362		537
Impaired Loans With Valuation Allowance, Related Allowance	35		35		45
Average Recorded Investment	1,297	1,374	1,304	1,379
Interest Income Recognized	13	13	21	27
Interest Income Recognized on Cash Basis	8	10	12	22
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans Without Valuation Allowance, Recorded Investment	1,150		1,150		1,548
Impaired Loans Without Valuation Allowance, Unpaid Principal Balance	1,666		1,666		1,878
Recorded Investment, Total	1,150		1,150		1,548
Average Recorded Investment	1,351	1,486	1,416	1,505
Interest Income Recognized	16	14	32	29
Residential Portfolio Segment [Member] | One-to Four-Family [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans With Valuation Allowance, Related Allowance	35		35		45
Recorded Investment, Total	1,136		1,136		1,190
Residential Portfolio Segment [Member] | Multi-Family Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans Without Valuation Allowance, Recorded Investment	930		930		44
Impaired Loans Without Valuation Allowance, Unpaid Principal Balance	930		930		44
Impaired Loans With Valuation Allowance, Recorded Investment					1,227
Impaired Loans With Valuation Allowance, Unpaid Principal Balance					1,227
Impaired Loans With Valuation Allowance, Related Allowance					65
Recorded Investment, Total	930		930		1,271
Average Recorded Investment	1,112	1,298	1,168	1,304
Interest Income Recognized	16	13	34	26
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans Without Valuation Allowance, Recorded Investment	751		751		784
Impaired Loans Without Valuation Allowance, Unpaid Principal Balance	751		751		784
Recorded Investment, Total	751		751		$ 784
Average Recorded Investment	758	824	766	831
Interest Income Recognized	9	9	17	19
Interest Income Recognized on Cash Basis	$ 4	$ 4	$ 7	$ 10

Loans - Summary of Troubled Deb

Loans - Summary of Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Modifications [Line Items]
Total TDRs on accrual status	$ 3,048	$ 12,341
Total TDRs on non-accrual status	722	770
Total TDRs	3,770	13,111
One-to Four-Family [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs on accrual status	2,118	2,152
Total TDRs on non-accrual status	722	770
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs on accrual status		8,906
Multi-Family Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs on accrual status	$ 930	1,271
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs on accrual status		$ 12

Loans - Risk Rated Loans by Cla

Loans - Risk Rated Loans by Class (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Multi-Family Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	$ 1,061,839	$ 1,010,521
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	2,647,033	2,621,979
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	748,457	686,948
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	627,718	625,018
Loans rated 1 - 6 [Member] | Multi-Family Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	1,058,471	1,006,295
Loans rated 1 - 6 [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	2,627,998	2,604,771
Loans rated 1 - 6 [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	748,457	686,948
Loans rated 1 - 6 [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	589,908	587,658
Loans Rated 7 [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	18,283	16,424
Loans Rated 7 [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	10,825	10,100
Loans Rated 8 [Member] | Multi-Family Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	3,368	4,226
Loans Rated 8 [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	752	784
Loans Rated 8 [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable Credit Quality Rating	$ 26,985	$ 27,260

Deposits - Summary of Deposit B

Deposits - Summary of Deposit Balances, by Type (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Banking And Thrift [Abstract]
Noninterest-bearing demand deposits	$ 505,679	$ 483,777
Interest-bearing demand deposits	1,161,835	1,190,346
Money market deposits	675,452	729,174
Regular savings and other deposits	986,112	794,813
Total non-certificate accounts	3,329,078	3,198,110
Term certificates less than $250,000	1,302,415	1,267,935
Term certificates $250,000 and greater	386,811	418,139
Total certificate accounts	1,689,226	1,686,074
Total deposits	$ 5,018,304	$ 4,884,184

Deposits - Summary of Term Cert

Deposits - Summary of Term Certificates, by Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Banking And Thrift [Abstract]
Within 1 year, Amount	$ 1,232,000	$ 1,043,283
Over 1 year to 2 years, Amount	395,466	485,028
Over 2 years to 3 years, Amount	23,263	96,591
Over 3 years to 4 years, Amount	30,778	47,926
Over 4 years to 5 years, Amount	7,719	13,246
Total certificate accounts	$ 1,689,226	$ 1,686,074
Within 1 year, Weighted Average Rate	2.18%	1.98%
Over 1 year to 2 years, Weighted Average Rate	2.09%	2.18%
Over 2 year to 3 years, Weighted Average Rate	1.74%	2.01%
Over 3 year to 4 years, Weighted Average Rate	2.61%	2.37%
Over 4 years to 5 years, Weighted Average Rate	1.77%	2.21%
Weighted average rate on term certificates	2.16%	2.05%

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Banking And Thrift [Abstract]
Brokered certificate of deposit included in term certificates	$ 479.5	$ 413.8
Weighted average rate of deposit included in term certificates	2.26%	2.20%
Brokered certificate of deposit included in term certificates	$ 35.4	$ 54.8
Weighted average rate of deposit included in term certificates	2.58%	2.37%
Brokered interest-bearing demand deposits	$ 150.4	$ 150.2
Brokered savings accounts	$ 60

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Debt Disclosure [Line Items]
Short-term borrowings with original maturity of less than one year consisted of FHLB advance		$ 50,000,000
Interest rate on FHLB advance		2.66%
Short-term borrowings	$ 0	$ 50,000,000
Available line of credit with the FHLB	9,400,000
Available borrowings under Federal Reserve Bank discount window	296,000
Amounts drawn on the line of credit	0	0
Outstanding borrowings under Federal Reserve Bank discount window	0	0
FHLB, total advances callable prior to maturity	600,088,000	536,880,000
Multi-Family Residential Real Estate [Member]
Debt Disclosure [Line Items]
Carrying value of commercial real estate loans pledged	306,400,000
Commercial Real Estate Portfolio Segment [Member]
Debt Disclosure [Line Items]
Carrying value of commercial real estate loans pledged	857,800,000
FHLB Callable [Member]
Debt Disclosure [Line Items]
FHLB, total advances callable prior to maturity	360,000,000
Variable Interest Rate [Member]
Debt Disclosure [Line Items]
FHLB, total advances callable prior to maturity	20,000,000	$ 240,000,000
Variable Interest Rate [Member] | FHLB Callable [Member]
Debt Disclosure [Line Items]
FHLB, total advances callable prior to maturity	$ 20,000,000
Weighted Average [Member]
Debt Disclosure [Line Items]
FHLB advances, weighted average rate	2.55%	1.69%
Weighted Average [Member] | FHLB Callable [Member]
Debt Disclosure [Line Items]
FHLB advances, weighted average rate	2.80%
Weighted Average [Member] | Variable Interest Rate [Member]
Debt Disclosure [Line Items]
FHLB advances, weighted average rate	1.60%	1.22%
Weighted Average [Member] | Variable Interest Rate [Member] | FHLB Callable [Member]
Debt Disclosure [Line Items]
FHLB advances, weighted average rate	1.60%

Borrowings - Long-term Debt, FH

Borrowings - Long-term Debt, FHLB Advances (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
2019		$ 50,000
Total advances	$ 600,088	$ 536,880
Weighted Average Rate, 2019		2.66%
Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Rate	2.55%	1.69%
Fixed Interest Rate [Member]
Debt Instrument [Line Items]
2019	$ 3,104	$ 4,160
2020	136,359	67,095
2021	25,000	25,000
2022	110,625	105,625
2023	275,000	75,000
2024	20,000
Thereafter	10,000	20,000
Total advances	$ 580,088	$ 296,880
Weighted Average Rate, 2019	2.06%	1.86%
Weighted Average Rate, 2020	2.29%	2.38%
Weighted Average Rate, 2021	1.70%	1.70%
Weighted Average Rate, 2022	1.97%	1.79%
Weighted Average Rate, 2023	3.10%	2.50%
Weighted Average Rate, 2024	2.61%
Weighted Average Rate, Thereafter	1.21%	1.36%
Weighted Average Rate	2.58%	2.07%
Variable Interest Rate [Member]
Debt Instrument [Line Items]
2023	$ 20,000	$ 220,000
Thereafter		20,000
Total advances	$ 20,000	$ 240,000
Weighted Average Rate, 2023	1.60%	1.17%
Weighted Average Rate, Thereafter		1.75%
Variable Interest Rate [Member] | Weighted Average [Member]
Debt Instrument [Line Items]
Weighted Average Rate	1.60%	1.22%

Borrowings - Variable Rate Adva

Borrowings - Variable Rate Advances Adjustment (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Total variable rate advances	$ 20,000	$ 240,000
First Year [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances	20,000	220,000
First Two Years [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances		20,000
3 Month Libor Less 100bp [Member] | First Year [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances	$ 20,000	45,000
Period of LIBOR measurement	3 months
LIBOR, Basis points	1.00%
3 Month Libor Less 100bp [Member] | First Two Years [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances		20,000
Period of LIBOR measurement	3 months
LIBOR, Basis points	1.00%
3 Month Libor Less 125bp [Member] | First Year [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances		25,000
Period of LIBOR measurement	3 months
LIBOR, Basis points	1.25%
3 Month Libor Less 130bp [Member] | First Year [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances		85,000
Period of LIBOR measurement	3 months
LIBOR, Basis points	1.30%
3 Month Libor Less 200bp [Member] | First Year [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances		50,000
Period of LIBOR measurement	3 months
LIBOR, Basis points	2.00%
3 Month Libor Less 230bp [Member] | First Year [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
FHLB advances		$ 15,000
Period of LIBOR measurement	3 months
LIBOR, Basis points	2.30%

Commitments and Contingencies_3

Commitments and Contingencies and Derivatives - Loan Commitments Outstanding (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Total loan commitments outstanding	$ 1,175,886	$ 1,220,007
Construction [Member] | Unadvanced Portion of Existing Loans [Member]
Loss Contingencies [Line Items]
Total loan commitments outstanding	496,507	559,139
Construction [Member] | Unfunded Loan Commitment [Member]
Loss Contingencies [Line Items]
Total loan commitments outstanding	153,051	182,207
Home Equity Lines of Credit [Member] | Unadvanced Portion of Existing Loans [Member]
Loss Contingencies [Line Items]
Total loan commitments outstanding	72,108	56,323
One-to Four-Family [Member] | Unfunded Loan Commitment [Member]
Loss Contingencies [Line Items]
Total loan commitments outstanding	30,769	20,226
Commercial Real Estate Portfolio Segment [Member] | Unfunded Loan Commitment [Member]
Loss Contingencies [Line Items]
Total loan commitments outstanding	51,239	82,810
Other Lines and Letters of Credit [Member] | Unadvanced Portion of Existing Loans [Member]
Loss Contingencies [Line Items]
Total loan commitments outstanding	359,857	311,842
Commercial and Industrial [Member] | Unfunded Loan Commitment [Member]
Loss Contingencies [Line Items]
Total loan commitments outstanding	$ 12,355	$ 7,460

Commitments and Contingencies_4

Commitments and Contingencies and Derivatives - Additional Information (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Cash pledged for collateral interest rate swap	$ 4,200,000	$ 0
Core Data Processing Provider [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other outstanding commitments	$ 10,800,000

Commitments and Contingencies_5

Commitments and Contingencies and Derivatives - Summary Information Regarding the Derivatives (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Customer Interest Rate Swap Maturing on 06/07/32 [Member]
Loss Contingencies [Line Items]
Notional amount	$ 63,219,000	$ 64,004,000
Fair value asset (liability)	$ 3,117,000	(1,310,000)
Maturity	Jun. 7, 2032
Interest rate paid	1 Mo. Libor + 200bp
Interest rate received	Fixed (4.40%)
Fixed interest rate received	4.40%
Customer Interest Rate Swap Maturing on 06/07/32 [Member] | LIBOR [Member]
Loss Contingencies [Line Items]
Variable interest rate paid	2.00%
Third Party Interest Rate Swap Maturing on 06/07/32 [Member]
Loss Contingencies [Line Items]
Notional amount	$ 63,219,000	64,004,000
Fair value asset (liability)	$ (3,117,000)	1,310,000
Maturity	Jun. 7, 2032
Interest rate paid	Fixed (4.40%)
Fixed interest rate paid	4.40%
Interest rate received	1 Mo. Libor + 200bp
Third Party Interest Rate Swap Maturing on 06/07/32 [Member] | LIBOR [Member]
Loss Contingencies [Line Items]
Variable interest rate received	2.00%
Customer Interest Rate Swap Maturing on 10/17/33 [Member]
Loss Contingencies [Line Items]
Notional amount	$ 10,316,000	10,458,000
Fair value asset (liability)	$ 908,000	471,000
Maturity	Oct. 17, 2033
Interest rate paid	1 Mo. Libor + 175bp
Interest rate received	Fixed (4.1052%)
Fixed interest rate received	4.1052%
Customer Interest Rate Swap Maturing on 10/17/33 [Member] | LIBOR [Member]
Loss Contingencies [Line Items]
Variable interest rate paid	1.75%
Third Party Interest Rate Swap Maturing on 10/17/33 [Member]
Loss Contingencies [Line Items]
Notional amount	$ 10,316,000	10,458,000
Fair value asset (liability)	$ (908,000)	(471,000)
Maturity	Oct. 17, 2033
Interest rate paid	Fixed (4.1052%)
Fixed interest rate paid	4.1052%
Interest rate received	1 Mo. Libor + 175bp
Third Party Interest Rate Swap Maturing on 10/17/33 [Member] | LIBOR [Member]
Loss Contingencies [Line Items]
Variable interest rate received	1.75%
Customer Interest Rate Swap Maturing on 12/13/26 [Member]
Loss Contingencies [Line Items]
Notional amount	$ 2,644,000	2,725,000
Fair value asset (liability)	$ 9,000	(109,000)
Maturity	Dec. 13, 2026
Interest rate paid	1 Mo. Libor + 205bp
Interest rate received	Fixed (3.82%)
Fixed interest rate received	3.82%
Customer Interest Rate Swap Maturing on 12/13/26 [Member] | LIBOR [Member]
Loss Contingencies [Line Items]
Variable interest rate paid	2.05%
Third Party Interest Rate Swap Maturing on 12/13/26 [Member]
Loss Contingencies [Line Items]
Notional amount	$ 2,644,000	2,725,000
Fair value asset (liability)	$ (9,000)	$ 109,000
Maturity	Dec. 13, 2026
Interest rate paid	Fixed (3.82%)
Fixed interest rate paid	3.82%
Interest rate received	1 Mo. Libor + 205bp
Third Party Interest Rate Swap Maturing on 12/13/26 [Member] | LIBOR [Member]
Loss Contingencies [Line Items]
Variable interest rate received	2.05%

Fair Values of Assets and Lia_3

Fair Values of Assets and Liabilities - Additional Information (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value	$ 4,034,000	$ 1,890,000
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans measured at fair value	1,700,000	2,100,000
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value	0
Impaired loans measured at fair value	$ 35,310,000	$ 32,486,000

Fair Values of Assets and Lia_4

Fair Values of Assets and Liabilities - Assets Measured at Fair Value on a Recurring Basis (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	$ 16,500,000	$ 17,159,000
Marketable equity securities	14,776,000	13,437,000
Total liabilities	4,034,000	1,890,000
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	35,310,000	32,486,000
Total liabilities	0
Loan Level Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan level interest rate swaps	4,034,000	1,890,000
Loan Level Interest Rate Swaps [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan level interest rate swaps	4,034,000	1,890,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable equity securities	14,776,000	13,437,000
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	14,776,000	13,437,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities	16,500,000	17,159,000
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	16,500,000	17,159,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities	4,034,000	1,890,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	4,034,000	1,890,000
Fair Value, Inputs, Level 3 [Member] | Loan Level Interest Rate Swaps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan level interest rate swaps	4,034,000	1,890,000
Fair Value, Inputs, Level 3 [Member] | Loan Level Interest Rate Swaps [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loan level interest rate swaps	$ 4,034,000	$ 1,890,000

Fair Values of Assets and Lia_5

Fair Values of Assets and Liabilities - Summary of Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financial assets:
Securities available for sale, at fair value	$ 16,500	$ 17,159
Marketable equity securities	14,776	13,437
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Marketable equity securities	14,776	13,437
Carrying Amount [Member]
Financial assets:
Cash and due from banks	361,050	371,995
Certificates of deposit	5,247	5,247
Securities available for sale, at fair value	16,500	17,159
Marketable equity securities	14,776	13,437
Federal Home Loan Bank stock	27,469	29,187
Loans and loans held for sale, net	5,767,477	5,593,812
Accrued interest receivable	15,436	14,267
Financial liabilities:
Deposits	5,018,304	4,884,184
Borrowings	600,088	586,880
Accrued interest payable	4,581	3,388
Carrying Amount [Member] | Interest Rate Swaps [Member]
Financial assets:
Loan level interest rate swaps	4,034	1,890
Financial liabilities:
Loan level interest rate swaps	4,034	1,890
Fair Value [Member]
Financial assets:
Cash and due from banks	361,050	371,995
Certificates of deposit	5,249	5,303
Securities available for sale, at fair value	16,500	17,159
Marketable equity securities	14,776	13,437
Federal Home Loan Bank stock	27,469	29,187
Loans and loans held for sale, net	5,730,926	5,489,521
Accrued interest receivable	15,436	14,267
Financial liabilities:
Deposits	5,061,528	4,714,313
Borrowings	610,462	582,861
Accrued interest payable	4,581	3,388
Fair Value [Member] | Interest Rate Swaps [Member]
Financial assets:
Loan level interest rate swaps	4,034	1,890
Financial liabilities:
Loan level interest rate swaps	4,034	1,890
Fair Value [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and due from banks	361,050	371,995
Marketable equity securities	14,776	13,437
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets:
Certificates of deposit	5,249	5,303
Securities available for sale, at fair value	16,500	17,159
Financial liabilities:
Borrowings	610,462	582,861
Fair Value [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets:
Federal Home Loan Bank stock	27,469	29,187
Loans and loans held for sale, net	5,730,926	5,489,521
Accrued interest receivable	15,436	14,267
Financial liabilities:
Deposits	5,061,528	4,714,313
Accrued interest payable	4,581	3,388
Fair Value [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Swaps [Member]
Financial assets:
Loan level interest rate swaps	4,034	1,890
Financial liabilities:
Loan level interest rate swaps	$ 4,034	$ 1,890