Sunshine Bancorp (SBCP) 10-Q 9 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 08, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	SBCP
Entity Registrant Name	SUNSHINE BANCORP, INC.
Entity Central Index Key	1,599,891
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		8,026,354

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 32,656	$ 16,562
Interest-earning deposits with banks	10,328	21,386
Federal funds sold	19,020	12,325
Cash and cash equivalents	62,004	50,273
Time deposits with banks	590	2,794
Securities available for sale	99,104	109,668
Loans held for sale	533	443
Loans, net of allowance for loan losses of $3,698 and $3,274	701,406	683,784
Premises and equipment, net	25,180	25,920
Federal Home Loan Bank stock, at cost	2,877	3,478
Cash surrender value of bank-owned life insurance	22,946	22,462
Deferred income tax asset	4,641	6,660
Goodwill and other intangibles	22,056	22,308
Accrued interest receivable	2,080	2,077
Other real estate owned		32
Other assets	216	1,536
Total assets	943,633	931,435
Liabilities:
Noninterest-bearing demand accounts	234,351	217,418
Interest-bearing demand and savings accounts	371,121	354,327
Time deposits	143,578	158,204
Total deposits	749,050	729,949
Other borrowings	56,884	71,867
Subordinated Notes	11,000	11,000
Other liabilities	8,425	6,518
Total liabilities	825,359	819,334
Stockholders' equity:
Preferred stock, $0.01 par value, 5,000,000 authorized; none issued or outstanding
Common stock, $0.01 par value, 50,000,000 shares authorized; issued and outstanding of 8,026,354 at September 30, 2017 and 7,986,074 shares at December 31, 2016	80	80
Additional paid in capital	95,086	94,302
Retained income	26,810	21,803
Unearned employee stock ownership plan ("ESOP") shares	(3,047)	(3,047)
Accumulated other comprehensive loss	(655)	(1,037)
Total stockholders' equity	118,274	112,101
Total liabilities and stockholders' equity	$ 943,633	$ 931,435

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 3,698	$ 3,274
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	8,026,354	7,986,074
Common stock, shares outstanding	8,026,354	7,986,074

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income:
Loans	$ 8,602	$ 4,582	$ 24,817	$ 12,678
Securities	446	222	1,320	684
Other	127	43	357	164
Total interest income	9,175	4,847	26,494	13,526
Interest Expense:
Deposits	665	349	1,785	962
Borrowed funds	262	192	759	372
Total interest expense	927	541	2,544	1,334
Net interest income	8,248	4,306	23,950	12,192
Provision for loan losses				350
Net interest income after provision for loan losses	8,248	4,306	23,950	11,842
Noninterest income:
Fees and service charges on deposit accounts	579	314	1,587	952
Gain on sale of loans held for sale	65	42	245	112
Gain on sale of securities		77		208
Gain on sale of premise				563
Income from bank-owned life insurance	195	97	565	289
Other	97	139	762	361
Total noninterest income	936	669	3,159	2,485
Noninterest expenses:
Salaries and employee benefits	3,876	2,423	11,201	7,440
Occupancy and equipment	691	544	2,120	1,706
Data and item processing services	649	440	1,750	1,177
Professional fees	161	246	628	665
Advertising and promotion	9	13	23	80
Stationery and supplies	18	64	123	165
FDIC Deposit insurance	68	96	245	298
Merger Related	295	207	295	302
Other	909	569	2,842	1,809
Total noninterest expenses	6,676	4,602	19,227	13,642
Income before income taxes	2,508	373	7,882	685
Income taxes	932	129	2,875	214
Net income	$ 1,576	$ 244	$ 5,007	$ 471
Basic earnings per share	$ 0.20	$ 0.05	$ 0.65	$ 0.10
Diluted earnings per share	$ 0.20	$ 0.05	$ 0.63	$ 0.09

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 1,576	$ 244	$ 5,007	$ 471
Change in unrealized loss on securities:
Unrealized gain arising during the period	9	96	612	542
Reclassification adjustment for realized gains		(77)		(208)
Net change in unrealized loss	9	19	612	334
Deferred income taxes on above change	(3)	(7)	(230)	(126)
Total other comprehensive income	6	12	382	208
Comprehensive income	$ 1,582	$ 256	$ 5,389	$ 679

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Income [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2015	$ 71,394	$ 53	$ 52,763	$ 21,846	$ (3,160)	$ (108)
Beginning Balance, Shares at Dec. 31, 2015		5,259,321
Net income(unaudited)	471			471
Issuance of common stock under share-based awards plan, net, Shares (unaudited)		931
Stock based compensation (unaudited)	637		637
Net change in unrealized loss on securities available for sale, net of taxes(unaudited)	208					208
Ending Balance at Sep. 30, 2016	72,710	$ 53	53,400	22,317	(3,160)	100
Ending Balance, Shares at Sep. 30, 2016		5,260,252
Beginning Balance at Dec. 31, 2016	112,101	$ 80	94,302	21,803	(3,047)	(1,037)
Beginning Balance, Shares at Dec. 31, 2016		7,986,074
Net income(unaudited)	5,007			5,007
Issuance of common stock under share-based awards plan, net (unaudited)	283		283
Issuance of common stock under share-based awards plan, net, Shares (unaudited)		40,280
Stock based compensation (unaudited)	501		501
Net change in unrealized loss on securities available for sale, net of taxes(unaudited)	382					382
Ending Balance at Sep. 30, 2017	$ 118,274	$ 80	$ 95,086	$ 26,810	$ (3,047)	$ (655)
Ending Balance, Shares at Sep. 30, 2017		8,026,354

Condensed Statements of Cash Fl

Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 5,007	$ 471
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, Amortization, Accretion, net	1,593	1,136
Provision for loan losses		350
Gain on sale of loans held for sale	(245)	(112)
Proceeds from the sale of loans held for sale	12,030	902
Gain on sale of premise		(563)
Loans originated as held for sale	(11,875)
Income from bank-owned life insurance, net	(484)	(244)
Gain on sale of securities available for sale		(208)
Increase in accrued interest receivable	(3)	(62)
Decrease in deferred tax asset	1,789	192
Stock based compensation	501	637
Other, net	3,822	(2,082)
Net cash provided by operating activities	12,135	417
Cash flows from investing activities:
Maturities of time deposits with banks	2,204	1,715
Proceeds from sale of securities available for sale		22,158
Calls, repayments, and maturities of securities available for sale	19,800	18,527
Purchases of securities available for sale	(9,317)	(35,870)
Net increase in loans	(17,606)	(70,034)
Purchases of premises and equipment, net	(487)	(771)
Proceeds from the sale of premise & equipment		1,600
Redemption (purchase) of Federal Home Loan Bank stock	601	(347)
Net cash used in investing activities	(4,805)	(63,022)
Cash flows from financing activities:
Net increase in deposits	19,101	39,656
Net (decrease) increase in other borrowings	(14,983)	7,876
Proceeds of issuance of common stock	283
Issuance of subordinated notes		11,000
Net cash provided by financing activities	4,401	58,532
Increase (decrease) in cash and cash equivalents	11,731	(4,073)
Cash and cash equivalents at beginning of period	50,273	59,344
Cash and cash equivalents at end of period	62,004	55,271
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	2,432	1,133
Noncash transactions-
Accumulated other comprehensive loss, net change in unrealized loss on securities available for sale, net of taxes	$ 382	208
Transfer from loans to other real estate owned		$ 20

Organization and Significant Ac

Organization and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Significant Accounting Policies	(1) Organization and Significant Accounting Policies Organization mutual-to-stock Sunshine Bank is a federal stock savings bank. It was first organized in 1954 as a federal mutual savings and loan association under the name First Federal Savings and Loan Association of Plant City. In 1975, the Bank changed its name to Sunshine State Federal Savings and Loan Association. In 2014, the Bank changed its name to Sunshine Bank. The Bank through its eighteen full service banking offices provides a variety of retail community banking services to individuals and businesses primarily in Hillsborough, Polk, Manatee, Sarasota, Pasco, Orange, Brevard, Osceola, and Seminole Our accounting and reporting policies conform to Accounting Principles Generally Accepted in the United States of America (“GAAP”) and general practices within the banking industry and are described in note 1 to the audited consolidated financial statements in our 2016 Annual Report on Form 10-K, 10-Q. 10-Q, In the opinion of management, the accompanying condensed consolidated financial statements of the Company contain all adjustments (consisting principally of normal recurring accruals) necessary to present fairly the financial position at September 30, 2017, and the results of operations for the three and nine month periods ended September 30, 2017 and 2016. The results of operations for the three and nine month periods ended September 30, 2017, are not necessarily indicative of the results to be expected for the full year or any other period. The preparation of financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the reported amounts in the condensed consolidated financial statements and notes. While management believes the sources utilized to arrive at the estimates are reliable, different sources or methods could have yielded different estimates. Such different value estimates could affect future earnings through different values being utilized for the disposition or amortization of the underlying assets and liabilities acquired. Material estimates that are particularly susceptible to significant changes include the allowance for loan losses, the valuation of goodwill and other intangibles, deferred income taxes, and purchase accounting related adjustments. Principles of Consolidation Share-based Compensation Comprehensive Income available-for-sale Recent Accounting Standards Update. During August 2017, the Financial Accounting Standards Board (“FASB”) issued ASU 2017-12, During July 2017, the FASB issued ASU 2017-11, During May 2017, the FASB issued new guidance related to Stock Compensation, Scope of Modification Accounting During March 2017, the FASB issued new guidance related to Premium Amortization on Purchased Callable Debt Securities During January 2017, the FASB issued new guidance related to, Simplifying the Test for Goodwill Impairment. During June 2016, the FASB issued new guidance related to Credit Losses. be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. Additionally, the guidance amends the accounting for credit losses on available-for-sale During March 2016, the FASB issued new guidance related to Compensation-Stock Compensation. During February 2016, the FASB issued new guidance related to Leases During January 2016, the FASB issued new guidance related to Financial Instruments The Company has elected to use the applicable extensions of time grant to emerging growth companies for all recently issued pronouncements from the FASB. Reclassifications

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Business Combinations	(2) Business Combinations Merger with CenterState Bank Corporation Under the terms and subject to the conditions of the Merger Agreement, each outstanding share of the Company’s common stock is entitled to receive 0.89 of a share of CenterState common stock. The transaction is expected to close early in the first quarter of 2018 subject to customary conditions, including, among others, the approval of the Merger Agreement by the stockholders of the Company, the absence of any order or other legal restriction prohibiting the closing of the Merger, and the receipt of required regulatory approvals. On October 25, 2017, the Office of the Comptroller of the Currency approved the merger of the Bank with and into CenterState Bank. In addition, CenterState had previously obtained a waiver from the Federal Reserve Bank of Atlanta from the requirement to file an application under the Bank Holding Company Act for CenterState to acquire the Company. Pending the approval by the stockholders of the Company of the Merger Agreement, as well as satisfaction of other customary closing conditions described in the Merger Agreement, the Company expects that the CS Merger will be completed in early January 2018. The Merger Agreement provides certain termination rights for both the Company and CenterState and further provides that a termination fee of $7.07 million will be payable by the Company to CenterState, as applicable, upon termination of the Merger Agreement under certain circumstances. The Company may also terminate the Merger Agreement in the event of a decline in CenterState’s stock price from the date of the Merger Agreement and as measured against a bank index over the period from the date of the Merger Agreement to the later to occur of the Company stockholders’ approval or receipt of the last regulatory approval required for the Merger provided that CenterState determines not to increase the merger consideration to be received by the Company’s stockholders as provided for in the Merger Agreement. Acquisition of Florida Bank of Commerce. I-4 Results of operations for FBC prior to the acquisition date are not included in the Condensed Consolidated Statements of Income for the three and nine month periods ended September 30, 2016. The table presents unaudited pro forma information as if the acquisition of FBC occurred on January 1, 2016. The tables below have been prepared for comparative purposes only and are not necessarily indicative of the actual results that would have been attained had the acquisition occurred as of the beginning of the periods presented. (in thousands, except per share amounts) Three months ended Net interest income $ 7,502 Net income $ 1,400 Basic and Diluted Pro forma Earnings per share $ 0.18 Nine months ended Net interest income $ 21,638 Net income $ 3,658 Basic and Diluted Pro forma Earnings per share $ 0.47

Securities

Securities	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Securities	(3) Securities Securities have been classified according to management intent. The amortized cost and fair values of securities are as follows (in thousands) Amortized Gross Unrealized Gross Unrealized Fair Securities Available for Sale: September 30, 2017: U.S. Government enterprise and agency obligations $ 12,481 17 (69 ) $ 12,429 Agency Mortgage-backed securities 87,673 17 (1,015 ) 86,675 Total $ 100,154 34 (1,084 ) $ 99,104 December 31, 2016: Federal Home Loan Bank obligations $ 3,000 2 — $ 3,002 U.S. Government enterprise and agency obligations 15,347 5 (99 ) 15,253 Agency Mortgage-backed securities 92,983 12 (1,582 ) 91,413 Total $ 111,330 19 (1,681 ) $ 109,668 The amortized cost and fair value of securities at September 30, 2017 by contractual maturity, are shown below. Actual maturities may differ from contractual maturities due to call or prepayment rights. Securities not due at a single maturity date, primarily mortgage backed securities, are shown separately. (in thousands) Securities Available for sale Amortized Cost Fair Value Due in one year or less $ 2,000 $ 1,999 Due from one year to five years 10,481 10,430 Agency Mortgage-backed securities 87,673 86,675 $ 100,154 $ 99,104 Securities with unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows (in thousands) Less Than Twelve Months Twelve Months or Greater Gross Unrealized Loss Fair Value Gross Unrealized Loss Fair Value Securities Available for sale: At September 30, 2017 US Government enterprise and agency obligations $ (69 ) $ 7,415 $ — $ — Agency Mortgage-backed securities (822 ) 71,393 (193 ) 7,817 Totals $ (891 ) $ 78,808 $ (193 ) $ 7,817 Less Than Twelve Months More than Twelve Months Gross Unrealized Loss Fair Value Gross Unrealized Loss Fair Value Securities Available for sale: At December 31, 2016 US Government enterprise and agency obligations $ (99 ) $ 9,387 $ — $ — Agency Mortgage-backed securities (1,582 ) 77,800 — $ — Totals $ (1,681 ) $ 87,187 $ — $ — At September 30, 2017 and December 31, 2016 there were thirty-four and thirty-two The Company pledged securities with a fair market value of approximately $34.9 million at September 30, 2017 and $22.1 million at December 31, 2016 to secure public funds and other borrowings. Securities available for sale sold, are summarized as follows (in thousands) For the three months ended For the nine months ended September 30, September 30, September 30, September 30, Proceeds received from sale $ — $ 9,238 $ — $ 22,158 Gross Gains on sale $ — $ 77 $ — $ 208

Loans

Loans	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Loans	(4) Loans The loan portfolio segments and classes are as follows (in thousands) At September 30, 2017 At December 31, Real estate loans: One-to-four-family $ 131,628 $ 155,262 Commercial and multi-family 367,008 356,788 Construction and land 64,849 51,520 Home equity 21,693 21,902 Total real estate loans 585,178 585,472 Commercial loans 119,225 100,239 Consumer loans 1,054 1,478 Total loans 705,457 687,189 Deduct: Deferred loan fees, net (353 ) (131 ) Allowance for loan losses (3,698 ) (3,274 ) Loans, net $ 701,406 $ 683,784 The Company has divided the loan portfolio into three portfolio segments, each with different risk characteristics and methodologies for assessing risk. All loans are underwritten in accordance with policies set forth and approved by the Company’s Board of Directors. The portfolio segments identified by the Company are as follows: Real Estate Loans. one-to-four-family One-to-four-family Commercial and multifamily real estate loans are secured by the subject property and are underwritten based on loan to value limits, cash flow coverage and general creditworthiness of the obligors. These loans are generally considered to have more credit risk than traditional one-to-four-family Construction and Land loans are to finance the construction of owner-occupied and lease properties. These loans are categorized as construction loans during the construction period, later converting to commercial or one-to- on-site pre-construction Home equity loans consists of either revolving line of credit, term, or second mortgage loans secured by one-to-four one-to-four Commercial Loans. Consumer Loans. An analysis of the change in the allowance for loan losses follows (in thousands) Real Estate Commercial Consumer Unallocated Total Three Months Ended September 30, 2017: Beginning balance $ 2,993 660 4 13 $ 3,670 (Credit) Provision for loan losses (169 ) 55 7 107 — Charge-offs — — — — — Recoveries 11 16 1 — 28 Ending balance $ 2,835 731 12 120 $ 3,698 Three Months Ended September 30, 2016: Beginning balance $ 2,240 606 35 14 $ 2,895 (Credit) Provision for loan losses (234 ) 190 (9 ) 53 — Charge-offs (73 ) (1 ) — — (74 ) Recoveries 8 17 — — 25 Ending balance $ 1,941 812 26 67 $ 2,846 Nine months Ended September 30, 2017: Beginning balance $ 2,473 469 6 326 $ 3,274 (Credit) Provision for loan losses (10 ) 202 14 (206 ) — Charge-offs — — (10 ) — (10 ) Recoveries 372 60 2 — 434 Ending balance $ 2,835 731 12 120 $ 3,698 Nine months Ended September 30, 2016: Beginning balance $ 1,354 583 23 551 $ 2,511 Provision (Credit) for loan losses 647 184 3 (484 ) 350 Charge-offs (95 ) (12 ) (3 ) — (110 ) Recoveries 35 57 3 — 95 Ending balance $ 1,941 812 26 67 $ 2,846 At September 30, 2017: Individually evaluated for impairment: Recorded investment $ 1,480 323 — — $ 1,803 Balance in allowance for loan losses $ 15 — — — $ 15 Collectively evaluated for impairment: Recorded investment $ 330,992 87,864 445 — $ 419,301 Balance in allowance for loan losses $ 2,285 671 12 120 $ 3,088 Recorded investment in acquired ASC 310-20 Loan Receivables $ 249,514 31,038 609 — $ 281,161 Balance in allowance for loan losses $ 535 60 — — $ 595 Recorded investment in acquired ASC 310-30 $ 3,192 — — — $ 3,192 Balance in allowance for loan losses $ — — — — $ — At December 31, 2016: Individually evaluated for impairment: Recorded investment $ 1,035 500 36 — $ 1,571 Balance in allowance for loan losses $ 21 9 1 — $ 31 Collectively evaluated for impairment: Recorded investment $ 274,513 59,586 608 — $ 334,707 Balance in allowance for loan losses $ 1,687 378 4 326 $ 2,395 Recorded investment in acquired ASC 310-20 Loan Receivables $ 307,605 40,153 834 — $ 348,592 Balance in allowance for loan losses $ 765 82 1 — $ 848 Recorded investment in acquired ASC 310-30 $ 2,319 — — — $ 2,319 Balance in allowance for loan losses $ — — — — $ — The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. Loans classified as substandard or special mention are reviewed quarterly by the Company for further deterioration or improvement to determine if they are appropriately classified and whether there is any impairment. All loans are graded upon initial issuance. Further, commercial, multi-family and commercial real estate loans are generally reviewed periodically to determine the appropriate loan grading. In addition, during the renewal process of any loan, as well as if a loan becomes past due, the Company will determine the appropriate loan grade. Loans excluded from the review process above are generally classified as pass credits until: (a) they become past due; (b) management becomes aware of a deterioration in the credit worthiness of the borrower; or (c) the borrower contacts the Company for a modification. In these circumstances, the loan is specifically evaluated for potential classification as to special mention, substandard or even charged-off. Pass Special Mention Substandard Doubtful Loss The following summarizes the loan credit quality (in thousands) Real Estate Loans One-to Four-Family Commercial Construction Home Commercial Consumer Total Credit Risk Profile by Internally Assigned Grade: At September 30, 2017: Grade: Pass $ 129,643 $ 363,591 $ 64,337 $ 21,371 $ 118,178 $ 1,054 $ 698,174 Special mention 406 1,419 246 30 970 — 3,071 Substandard 1,579 1,998 266 292 77 — 4,212 Total $ 131,628 $ 367,008 $ 64,849 $ 21,693 $ 119,225 $ 1,054 $ 705,457 At December 31, 2016: Grade: Pass $ 153,965 $ 351,096 $ 49,901 $ 21,902 $ 98,714 $ 1,442 $ 677,020 Special mention 490 730 543 — 79 — 1,842 Substandard 807 4,962 1,076 — 1,446 36 8,327 Total $ 155,262 $ 356,788 $ 51,520 $ 21,902 $ 100,239 $ 1,478 $ 687,189 Age analysis of past-due (in thousands) Accruing Loans 30-59 60-89 90 Days Or Total Current Nonaccrual Total At September 30, 2017: Real estate mortgage loans: One-to-four $ 172 $ 16 $ — $ 188 $ 130,656 $ 784 $ 131,628 Commercial and Multifamily 756 — — 756 366,112 140 367,008 Construction and Land 12 496 — 508 64,161 180 64,849 Home Equity — — — — 21,690 3 21,693 Commercial loans 2,145 21 — 2,166 117,059 — 119,225 Consumer loans 61 — — 61 993 — 1,054 Total $ 3,146 $ 533 $ — $ 3,679 $ 700,671 $ 1,107 $ 705,457 At December 31, 2016: Real estate mortgage loans: One-to-four $ 501 $ 274 $ — $ 775 $ 154,487 $ — $ 155,262 Commercial and Multifamily 778 — — 778 355,755 255 356,788 Construction and Land 1,519 — — 1,519 50,001 — 51,520 Home Equity 22 — — 22 21,880 — 21,902 Commercial loans 217 — — 217 100,022 — 100,239 Consumer loans 10 — — 10 1,432 36 1,478 Total $ 3,047 $ 274 $ — $ 3,321 $ 683,577 $ 291 $ 687,189 The following summarizes the amount of impaired loans (in thousands) With No Related With an Allowance Recorded Total Recorded Unpaid Recorded Unpaid Related Recorded Unpaid Related September 30, 2017 Real estate mortgage loans: One-to- $ 784 $ 784 $ 309 $ 309 $ 15 $ 1,093 $ 1,093 $ 15 Commercial and Multifamily 204 626 — — — 204 626 — Construction and Land 180 180 — — — 180 180 — Home Equity 3 3 — — — 3 3 — Commercial loans 323 358 — — — 323 358 — $ 527 $ 984 $ 309 $ 309 $ 15 $ 1,803 $ 2,260 $ 15 December 31, 2016: Real estate mortgage loans: One-to- $ — $ — $ 448 $ 448 $ 21 $ 448 $ 448 $ 21 Commercial and Multifamily 587 1,568 — — — 587 1,568 — Commercial loans 427 457 73 77 9 500 534 9 Consumer Loans — — 36 36 1 36 36 1 $ 1,014 $ 2,025 $ 557 $ 561 $ 31 $ 1,571 $ 2,586 $ 31 The average net investment in impaired loans and interest income recognized and received on impaired loans are as follows (in thousands) Three Months Ended September 30, 2017 2016 Average Interest Interest Average Interest Interest Real estate mortgage loans: One-to-four-family $ 309 $ 4 $ 5 $ 453 $ 6 $ 6 Commercial and Multifamily 209 9 10 902 8 19 Construction and Land — — — 73 — 6 Commercial loans 327 6 8 518 9 10 Total $ 845 $ 19 $ 23 $ 1,946 $ 23 $ 41 Nine months Ended September 30, 2017 2016 Average Interest Interest Average Interest Interest Real estate mortgage loans: One-to-four-family $ 312 $ 14 $ 13 $ 455 $ 20 $ 18 Commercial and Multifamily 229 28 27 918 36 66 Construction and Land — — — 167 — 8 Commercial loans 390 21 23 525 27 28 Total $ 931 $ 63 $ 63 $ 2,065 $ 83 $ 120 During the nine months ended September 30, 2017 and 2016, the Company did not enter into any debt restructurings and the Company had no loans restructured as troubled debt restructurings (“TDRs”) that subsequently defaulted that had been modified in the previous twelve month period. As of September 30, 2017 the Company had remaining approximately $405,000 in accruing TDRs and $71,000 of non-accruing At September 30, 2017 the contractually required principal of Purchased Credit Impaired (“PCI”) loans acquired was $3.2 million. The recorded investment of PCI loans was $2.8 million. There were no additional losses generated during the nine months ended September 30, 2017 from these loans.

Other Borrowings

Other Borrowings	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Other Borrowings	(5) Other Borrowings The Company is a member of the Federal Home Loan Bank of Atlanta (“FHLB”). The FHLB requires members to purchase stock in the FHLB, the required amount changes based upon their level of borrowings. FHLB stock is non-marketable At September 30, 2017, the Company had a maximum borrowing capacity of approximately $238.8 million with the FHLB. Advances are secured by a blanket lien on loans and the Company’s FHLB stock. Pursuant to the collateral agreement, borrowing availability is determined by the amount of qualifying collateral pledged. As of September 30, 2017 the Company had $136.2 million in loans pledged and total credit availability of approximately $88.2 million. As of September 30, 2017, the Company had the following FHLB advances ($ in thousands). At September 30, 2017 Maturing in the year ending Advance type Interest rate Amount 2017 Fixed Rate 1.29 % $ 5,000 2017 Fixed Rate 1.28 % 5,000 2017 Fixed Rate 1.20 % 8,000 2017 Fixed Rate 1.17 % 20,000 2018 Fixed Rate 1.27 % 10,000 $48,000 The Company enters into sweep agreements with customers that sweep funds from deposit accounts into investment accounts. These investment accounts are not federally insured and are treated as borrowings. At September 30, 2017 the outstanding balance of such borrowings totaled $8.9 million. The Company pledged securities with a market value of $11.7 million as collateral for these agreements. There were $6.9 million in sweep agreements at December 31, 2016.

Subordinated notes

Subordinated notes	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Subordinated notes	(6) Subordinated notes On March 30, 2016, the Company accepted subscriptions for and sold, at 100% of their principal amount, an aggregate of $11.0 million of subordinated notes (the “Notes”), on a private placement basis, to two accredited investors. The investors included a corporation owned and controlled by George Parmer, who is a director of the Company, which purchased $7.0 million in principal amount of the Notes. The Notes bear interest at a fixed interest rate of 5.0% per year. The Notes have a term of five years, and have a maturity date of April 1, 2021. The Notes are redeemable at the option of the Company, in whole or in part, at any time, without penalty or premium, subject to any required regulatory approvals. The Company contributed the proceeds from the Notes to the Bank as equity capital to support the Bank’s continued growth, including ongoing lending activities.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	(7) Fair Value of Financial Instruments The estimated fair values of the Company’s financial instruments are as follows (in thousands) At September 30, 2017 At December 31, 2016 Carrying Fair Carrying Fair Financial assets: Cash and cash equivalents (Level 1) $ 62,004 $ 62,004 $ 50,273 $ 50,273 Time deposits with banks (Level 1) 590 590 2,794 2,794 Securities available for sale (Level 2) 99,104 99,104 109,668 109,668 Loans held for sale (Level 3) 533 544 443 450 Loans (Level 3) 701,406 703,861 683,784 718,111 Federal Home Loan Bank stock (Level 3) 2,877 2,877 3,478 3,478 Accrued interest receivable (Level 3) 2,080 2,080 2,077 2,077 Financial liabilities: Deposits (Level 3) 749,050 748,226 729,949 729,553 FHLB Advances (Level 3) 48,000 47,910 65,000 64,975 Other borrowings (Level 3) 8,884 8,884 6,867 6,867 Subordinated notes (Level 3) 11,000 10,857 11,000 10,860 Off-balance-sheet — — — — Discussion regarding the assumptions used to compute the estimated fair values of instruments can be found in Note 1 to the consolidated financial statements included in the Company’s Annual Report on Form 10-K 10-K”).

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	(8) Fair Value Measurements Securities available for sale measured at fair value on a recurring basis are summarized below (in thousands) At September 30, 2017: Fair Value Level 1 Level 2 Level 3 U.S. Government enterprise and agency obligations $ 12,429 — $ 12,429 — Agency Mortgage-backed securities 86,675 — 86,675 — Total $ 99,104 — $ 99,104 — At December 31, 2016: Fair Value Level 1 Level 2 Level 3 Federal Home Loan Bank obligations $ 3,002 — $ 3,002 — U.S. Government enterprise and agency obligations 15,253 — 15,253 — Agency Mortgage-backed securities 91,413 — 91,413 — Total $ 109,668 — $ 109,668 — During the three and the nine month periods ended September 30, 2017 and 2016 no securities were transferred in or out of Levels 1, 2, or 3. Impaired collateral-dependent loans are carried at fair value when the current collateral value is lower than the carrying value of the loan. Those impaired collateral-dependent loans which are measured at fair value on a nonrecurring basis, excluding purchased credit impaired loans are as follows (in thousands) At Period End Total Losses Losses Recorded During the Period Fair Value Level 1 Level 2 Level 3 At September 30, 2017: One-to-four-family $ 309 — — $ 309 $ 15 — Commercial and Multifamily 204 — — 204 422 — Commercial 323 — — 323 35 — Total $ 836 — — $ 836 $ 472 — At December 31, 2016: Commercial and Multifamily $ 587 — — $ 587 $ 718 $ 73 Commercial 427 — — 427 72 — Total $ 1,014 — — $ 1,014 $ 790 $ 73 Other real estate owned which is measured at fair value on a nonrecurring basis is summarized below (in thousands) At Period End Total Losses Fair Level 1 Level 2 Level 3 At September 30, 2017 Other real estate owned $ — — — $ — — — At December 31, 2016 Other real estate owned $ 32 — — $ 32 — —

Employee Stock Ownership Plan (

Employee Stock Ownership Plan ("ESOP")	9 Months Ended
	Sep. 30, 2017
Employee Stock Ownership Plan [Member]
Employee Stock Ownership Plan ("ESOP")	(9) Employee Stock Ownership Plan (“ESOP”) The Holding Company has established an ESOP which acquired 338,560 shares in exchange for a $3,385,600 indirect note payable from the Employee Stock Ownership Plan Trust to the Holding Company. The note bears interest at a variable rate based on Prime and is payable in thirty annual installments. As of September 30, 2017 33,855 shares held by the Employee Stock Ownership Plan Trust have been released and allocated to employees. ESOP shares were as follows ($ in thousands, except per share amounts): At September 30, At December 31, Allocated shares 33,855 33,855 Unallocated shares 304,705 304,705 Total ESOP shares 338,560 338,560 Fair value of unallocated shares $ 7,081 $ 5,223

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	(10) Stock-Based Compensation The Company’s 2015 Equity Incentive Plan (the “Plan”), provides for the grant of stock-based awards to officers, employees and directors of the Company. Generally the grants vest over a five year period. On September 28, 2016, stockholders approved an amendment to the Plan, increasing the total number of shares available for issuance from 592,480 shares to 742,480 shares and the corresponding increase in the maximum number of shares issuable pursuant to the exercise of stock options. Awards of the Company granted as replacements for awards granted by an acquired company do not reduce the total available for issuance. Stock-based compensation is accounted for in accordance with FASB ASC Topic 718 for Compensation — Stock Compensation Stock Options Weighted Average Outstanding at January 1, 2017 800,190 $ 13.04 Granted — — Forfeited (11,300 ) $ 14.28 Exercised or Expired (76,964 ) $ 11.95 Outstanding at September 30, 2017 711,926 $ 13.15 Exercisable at September 30, 2017 321,010 $ 12.63 Unvested awards at September 30, 2017 390,916 $ 14.18 Restricted Stock Weighted Average Grant Non-vested 82,874 $ 13.97 Granted — — Forfeited (1,500 ) $ 13.96 Unvested awards at September 30, 2017 81,374 $ 13.97 The weighted average remaining contractual term was approximately 7.9 years and the aggregate intrinsic value was $7.2 million for options outstanding as of September 30, 2017. As of September 30, 2017, exercisable options had a weighted average remaining contractual term of approximately 7.4 years, and an aggregate intrinsic value of $3.6 million. As of September 30, 2017, there was approximately $ 849,000 of total unrecognized compensation cost related to options and approximately $853,000 in unrecognized compensation cost related to non-vested year-to-date non-exercisable

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Regulatory Matters	(11) Regulatory Matters Effective January 1, 2015, the Bank became subject to new capital requirements set forth by federal banking regulations. These changes were designed to ensure capital positions remain strong during the events of economic downturns or unforeseen losses. The Company is exempt from consolidated capital requirements as the Federal Reserve Board amended its “small bank holding company” policy statement to generally exempt savings and loan holding companies with less than $1.0 billion in assets from capital requirements. These new requirements create a new capital ratio for common equity Tier 1 capital and increase the Tier 1 capital ratio requirements. Under the new capital regulation for the Bank, the minimum capital ratios consist of a common equity tier 1 ratio of 4.5% of risk-weighted assets, a tier 1 capital ratio of 6.0% of risk-weighted assets, a total capital ratio of 8.0% of risk weighted assets, and a leverage ratio of 4.0%. Common equity tier 1 generally comprises of common stock, additional paid in capital, and retained income. There were changes in the risk weighting of certain assets to better reflect the risk associated with those assets, such as the risk weighting for nonperforming loans and certain high volatility commercial real estate acquisitions, development and construction loans. The changes also include additional limitations on the inclusion of deferred tax assets in capital. The Bank made a one-time The following table shows the Bank’s capital amounts and ratios and regulatory thresholds at September 30, 2017 and December 31, 2016. As of September 30, 2017 the Bank was “Well Capitalized” under all capital ratios. ($ in thousands) Actual Minimum for Capital Minimum to be Well Amount % Amount % Amount % September 30, 2017 Common Equity Tier 1 to Risk-Weighted Assets $ 98,802 13.18 % $ 33,736 4.50 % $ 48,729 6.50 % Tier I Capital to Risk-Weighted Assets 98,802 13.18 % 44,981 6.00 % 59,974 8.00 % Total Capital to Risk-Weighted Assets 102,500 13.67 % 59,974 8.00 % 74,968 10.00 % Tier I Capital to Total Assets 98,802 10.70 % 36,925 4.00 % 46,157 5.00 % December 31, 2016 Common Equity Tier 1 to Risk-Weighted Assets $ 93,083 12.93 % $ 32,387 4.50 % $ 46,781 6.50 % Tier I Capital to Risk-Weighted Assets 93,083 12.93 % 43,183 6.00 % 57,577 8.00 % Total Capital to Risk-Weighted Assets 96,357 13.39 % 57,577 8.00 % 71,971 10.00 % Tier I Capital to Total Assets 93,083 12.10 % 30,771 4.00 % 38,464 5.00 %

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings per Share	(12) Earnings per Share Basic earnings per share has been computed on the basis of the weighted-average number of shares of common stock outstanding. For the three and the nine months ended September 30, 2017 outstanding stock options are considered dilutive securities for the purposes of calculating diluted earnings per share which was computed using the treasury method. The shares purchased by the Employee Stock Ownership Plan are included in the weighted-average shares when they are committed to be released. ($ in thousands, except per share amounts) Three months Ended September 30, 2017 Three months Ended September 30, 2016 Net Income Available to Common Stockholders $ 1,576 $ 244 Weighted Average Shares 7,719,405 4,944,262 Basic income per share: $ 0.20 $ 0.05 Weighted Average Diluted Shares 7,978,532 4,955,143 Diluted income per share $ 0.20 $ 0.05 Nine months Ended September 30, 2017 Nine months Ended September 30, 2016 Net Income Available to Common Stockholders $ 5,007 $ 471 Weighted Average Shares 7,714,526 4,947,549 Basic income per share: $ 0.65 $ 0.10 Weighted Average Diluted Shares 7,934,401 4,960,023 Diluted income per share $ 0.63 $ 0.09

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Event	(13) Subsequent Event On October 9, 2017, The Company received notice that a putative class action lawsuit was filed in the Circuit Court of the Thirteenth Judicial Circuit in Hillsborough, Florida against the Company, each of the members of its board of directors and CenterState, captioned Stephen Bushansky, On Behalf of Himself and All Others Similarly Situated v. Sunshine Bancorp, Inc., Ray H. Rollyson, Jr., D. William Morrow, Joe E. Newsome, Will Weatherford, William E. Pommerening, Marion M. Smith, W.D. McGinnes, Jr., George Parmer, Kenneth H. Compton, Malcolm Robert Kirschenbaum, James T. Swann, Sal A. Nunziata, John C. Reich, Andrew S. Samuel, Dana S. Kilborne and CenterState Bank Corporation The outcome of the pending and any additional future litigation is uncertain. If this case is not resolved, this lawsuit could prevent or delay completion of the CS Merger and result in substantial costs to the Company and CenterState, including any costs associated with the indemnification of directors and officers. One of the conditions to the closing of the CS Merger is that no order, injunction or decree or other legal restraint or prohibition that prevents consummating the merger, the bank merger or any of the other transactions contemplated by the Merger Agreement will be in effect. As such, if the plaintiff is successful in obtaining an injunction prohibiting the completion of the CS Merger on the agreed-upon terms, then such injunction may prevent the CS Merger from being completed, or from being completed within the expected timeframe. The defense or settlement of any lawsuit or claim that remains unresolved at the time the CS Merger is completed may adversely affect CenterState’s business, financial condition, results of operations and cash flows. The defendants strongly believe that the lawsuit is without merit and intend to vigorously defend against the pending claims.

Organization and Significant 21

Organization and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization mutual-to-stock Sunshine Bank is a federal stock savings bank. It was first organized in 1954 as a federal mutual savings and loan association under the name First Federal Savings and Loan Association of Plant City. In 1975, the Bank changed its name to Sunshine State Federal Savings and Loan Association. In 2014, the Bank changed its name to Sunshine Bank. The Bank through its eighteen full service banking offices provides a variety of retail community banking services to individuals and businesses primarily in Hillsborough, Polk, Manatee, Sarasota, Pasco, Orange, Brevard, Osceola, and Seminole Counties, Florida. Our accounting and reporting policies conform to Accounting Principles Generally Accepted in the United States of America (“GAAP”) and general practices within the banking industry and are described in note 1 to the audited consolidated financial statements in our 2016 Annual Report on Form 10-K, 10-Q. 10-Q, In the opinion of management, the accompanying condensed consolidated financial statements of the Company contain all adjustments (consisting principally of normal recurring accruals) necessary to present fairly the financial position at September 30, 2017, and the results of operations for the three and nine month periods ended September 30, 2017 and 2016. The results of operations for the three and nine month periods ended September 30, 2017, are not necessarily indicative of the results to be expected for the full year or any other period. The preparation of financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the reported amounts in the condensed consolidated financial statements and notes. While management believes the sources utilized to arrive at the estimates are reliable, different sources or methods could have yielded different estimates. Such different value estimates could affect future earnings through different values being utilized for the disposition or amortization of the underlying assets and liabilities acquired. Material estimates that are particularly susceptible to significant changes include the allowance for loan losses, the valuation of goodwill and other intangibles, deferred income taxes, and purchase accounting related adjustments.
Principles of Consolidation	Principles of Consolidation
Share-based Compensation	Share-based Compensation
Comprehensive Income	Comprehensive Income available-for-sale
Recent Accounting Standards Update	Recent Accounting Standards Update. During August 2017, the Financial Accounting Standards Board (“FASB”) issued ASU 2017-12, During July 2017, the FASB issued ASU 2017-11, During May 2017, the FASB issued new guidance related to Stock Compensation, Scope of Modification Accounting During March 2017, the FASB issued new guidance related to Premium Amortization on Purchased Callable Debt Securities During January 2017, the FASB issued new guidance related to, Simplifying the Test for Goodwill Impairment. During June 2016, the FASB issued new guidance related to Credit Losses. be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. Additionally, the guidance amends the accounting for credit losses on available-for-sale During March 2016, the FASB issued new guidance related to Compensation-Stock Compensation. During February 2016, the FASB issued new guidance related to Leases During January 2016, the FASB issued new guidance related to Financial Instruments The Company has elected to use the applicable extensions of time grant to emerging growth companies for all recently issued pronouncements from the FASB.
Reclassifications	Reclassifications

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Schedule of Unaudited Pro Forma Information	The tables below have been prepared for comparative purposes only and are not necessarily indicative of the actual results that would have been attained had the acquisition occurred as of the beginning of the periods presented. (in thousands, except per share amounts) Three months ended Net interest income $ 7,502 Net income $ 1,400 Basic and Diluted Pro forma Earnings per share $ 0.18 Nine months ended Net interest income $ 21,638 Net income $ 3,658 Basic and Diluted Pro forma Earnings per share $ 0.47

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Value of Securities	The amortized cost and fair values of securities are as follows (in thousands) Amortized Gross Unrealized Gross Unrealized Fair Securities Available for Sale: September 30, 2017: U.S. Government enterprise and agency obligations $ 12,481 17 (69 ) $ 12,429 Agency Mortgage-backed securities 87,673 17 (1,015 ) 86,675 Total $ 100,154 34 (1,084 ) $ 99,104 December 31, 2016: Federal Home Loan Bank obligations $ 3,000 2 — $ 3,002 U.S. Government enterprise and agency obligations 15,347 5 (99 ) 15,253 Agency Mortgage-backed securities 92,983 12 (1,582 ) 91,413 Total $ 111,330 19 (1,681 ) $ 109,668
Scheduled Maturities of Securities	Securities not due at a single maturity date, primarily mortgage backed securities, are shown separately. (in thousands) Securities Available for sale Amortized Cost Fair Value Due in one year or less $ 2,000 $ 1,999 Due from one year to five years 10,481 10,430 Agency Mortgage-backed securities 87,673 86,675 $ 100,154 $ 99,104
Schedule of Securities Unrealized Loss Position	Securities with unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows (in thousands) Less Than Twelve Months Twelve Months or Greater Gross Unrealized Loss Fair Value Gross Unrealized Loss Fair Value Securities Available for sale: At September 30, 2017 US Government enterprise and agency obligations $ (69 ) $ 7,415 $ — $ — Agency Mortgage-backed securities (822 ) 71,393 (193 ) 7,817 Totals $ (891 ) $ 78,808 $ (193 ) $ 7,817 Less Than Twelve Months More than Twelve Months Gross Unrealized Loss Fair Value Gross Unrealized Loss Fair Value Securities Available for sale: At December 31, 2016 US Government enterprise and agency obligations $ (99 ) $ 9,387 $ — $ — Agency Mortgage-backed securities (1,582 ) 77,800 — $ — Totals $ (1,681 ) $ 87,187 $ — $ —
Summary of Securities Available for Sale Sold	Securities available for sale sold, are summarized as follows (in thousands) For the three months ended For the nine months ended September 30, September 30, September 30, September 30, Proceeds received from sale $ — $ 9,238 $ — $ 22,158 Gross Gains on sale $ — $ 77 $ — $ 208

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Schedule of Loan Portfolio Segments and Classes	The loan portfolio segments and classes are as follows (in thousands) At September 30, 2017 At December 31, Real estate loans: One-to-four-family $ 131,628 $ 155,262 Commercial and multi-family 367,008 356,788 Construction and land 64,849 51,520 Home equity 21,693 21,902 Total real estate loans 585,178 585,472 Commercial loans 119,225 100,239 Consumer loans 1,054 1,478 Total loans 705,457 687,189 Deduct: Deferred loan fees, net (353 ) (131 ) Allowance for loan losses (3,698 ) (3,274 ) Loans, net $ 701,406 $ 683,784
Schedule of Change in Allowance for Loan Losses	An analysis of the change in the allowance for loan losses follows (in thousands) Real Estate Commercial Consumer Unallocated Total Three Months Ended September 30, 2017: Beginning balance $ 2,993 660 4 13 $ 3,670 (Credit) Provision for loan losses (169 ) 55 7 107 — Charge-offs — — — — — Recoveries 11 16 1 — 28 Ending balance $ 2,835 731 12 120 $ 3,698 Three Months Ended September 30, 2016: Beginning balance $ 2,240 606 35 14 $ 2,895 (Credit) Provision for loan losses (234 ) 190 (9 ) 53 — Charge-offs (73 ) (1 ) — — (74 ) Recoveries 8 17 — — 25 Ending balance $ 1,941 812 26 67 $ 2,846 Nine months Ended September 30, 2017: Beginning balance $ 2,473 469 6 326 $ 3,274 (Credit) Provision for loan losses (10 ) 202 14 (206 ) — Charge-offs — — (10 ) — (10 ) Recoveries 372 60 2 — 434 Ending balance $ 2,835 731 12 120 $ 3,698 Nine months Ended September 30, 2016: Beginning balance $ 1,354 583 23 551 $ 2,511 Provision (Credit) for loan losses 647 184 3 (484 ) 350 Charge-offs (95 ) (12 ) (3 ) — (110 ) Recoveries 35 57 3 — 95 Ending balance $ 1,941 812 26 67 $ 2,846 At September 30, 2017: Individually evaluated for impairment: Recorded investment $ 1,480 323 — — $ 1,803 Balance in allowance for loan losses $ 15 — — — $ 15 Collectively evaluated for impairment: Recorded investment $ 330,992 87,864 445 — $ 419,301 Balance in allowance for loan losses $ 2,285 671 12 120 $ 3,088 Recorded investment in acquired loans accounted for under ASC 310-20 Loan Receivables $ 249,514 31,038 609 — $ 281,161 Balance in allowance for loan losses $ 535 60 — — $ 595 Recorded investment in acquired loans accounted for under ASC 310-30 $ 3,192 — — — $ 3,192 Balance in allowance for loan losses $ — — — — $ — At December 31, 2016: Individually evaluated for impairment: Recorded investment $ 1,035 500 36 — $ 1,571 Balance in allowance for loan losses $ 21 9 1 — $ 31 Collectively evaluated for impairment: Recorded investment $ 274,513 59,586 608 — $ 334,707 Balance in allowance for loan losses $ 1,687 378 4 326 $ 2,395 Recorded investment in acquired loans accounted for under ASC 310-20 Loan Receivables $ 307,605 40,153 834 — $ 348,592 Balance in allowance for loan losses $ 765 82 1 — $ 848 Recorded investment in acquired loans accounted for under ASC 310-30 $ 2,319 — — — $ 2,319 Balance in allowance for loan losses $ — — — — $ —
Summary of Loan Credit Quality	The following summarizes the loan credit quality (in thousands) Real Estate Loans One-to Four-Family Commercial Construction Home Commercial Consumer Total Credit Risk Profile by Internally Assigned Grade: At September 30, 2017: Grade: Pass $ 129,643 $ 363,591 $ 64,337 $ 21,371 $ 118,178 $ 1,054 $ 698,174 Special mention 406 1,419 246 30 970 — 3,071 Substandard 1,579 1,998 266 292 77 — 4,212 Total $ 131,628 $ 367,008 $ 64,849 $ 21,693 $ 119,225 $ 1,054 $ 705,457 At December 31, 2016: Grade: Pass $ 153,965 $ 351,096 $ 49,901 $ 21,902 $ 98,714 $ 1,442 $ 677,020 Special mention 490 730 543 — 79 — 1,842 Substandard 807 4,962 1,076 — 1,446 36 8,327 Total $ 155,262 $ 356,788 $ 51,520 $ 21,902 $ 100,239 $ 1,478 $ 687,189
Age Analysis of Past Due Loans	Age analysis of past-due (in thousands) Accruing Loans 30-59 60-89 90 Days Or Total Current Nonaccrual Total At September 30, 2017: Real estate mortgage loans: One-to-four $ 172 $ 16 $ — $ 188 $ 130,656 $ 784 $ 131,628 Commercial and Multifamily 756 — — 756 366,112 140 367,008 Construction and Land 12 496 — 508 64,161 180 64,849 Home Equity — — — — 21,690 3 21,693 Commercial loans 2,145 21 — 2,166 117,059 — 119,225 Consumer loans 61 — — 61 993 — 1,054 Total $ 3,146 $ 533 $ — $ 3,679 $ 700,671 $ 1,107 $ 705,457 At December 31, 2016: Real estate mortgage loans: One-to-four $ 501 $ 274 $ — $ 775 $ 154,487 $ — $ 155,262 Commercial and Multifamily 778 — — 778 355,755 255 356,788 Construction and Land 1,519 — — 1,519 50,001 — 51,520 Home Equity 22 — — 22 21,880 — 21,902 Commercial loans 217 — — 217 100,022 — 100,239 Consumer loans 10 — — 10 1,432 36 1,478 Total $ 3,047 $ 274 $ — $ 3,321 $ 683,577 $ 291 $ 687,189
Summary of Impaired Loans	The following summarizes the amount of impaired loans (in thousands) With No Related With an Allowance Recorded Total Recorded Unpaid Recorded Unpaid Related Recorded Unpaid Related September 30, 2017 Real estate mortgage loans: One-to- $ 784 $ 784 $ 309 $ 309 $ 15 $ 1,093 $ 1,093 $ 15 Commercial and Multifamily 204 626 — — — 204 626 — Construction and Land 180 180 — — — 180 180 — Home Equity 3 3 — — — 3 3 — Commercial loans 323 358 — — — 323 358 — $ 527 $ 984 $ 309 $ 309 $ 15 $ 1,803 $ 2,260 $ 15 December 31, 2016: Real estate mortgage loans: One-to- $ — $ — $ 448 $ 448 $ 21 $ 448 $ 448 $ 21 Commercial and Multifamily 587 1,568 — — — 587 1,568 — Commercial loans 427 457 73 77 9 500 534 9 Consumer Loans — — 36 36 1 36 36 1 $ 1,014 $ 2,025 $ 557 $ 561 $ 31 $ 1,571 $ 2,586 $ 31 The average net investment in impaired loans and interest income recognized and received on impaired loans are as follows (in thousands) Three Months Ended September 30, 2017 2016 Average Interest Interest Average Interest Interest Real estate mortgage loans: One-to-four-family $ 309 $ 4 $ 5 $ 453 $ 6 $ 6 Commercial and Multifamily 209 9 10 902 8 19 Construction and Land — — — 73 — 6 Commercial loans 327 6 8 518 9 10 Total $ 845 $ 19 $ 23 $ 1,946 $ 23 $ 41 Nine months Ended September 30, 2017 2016 Average Interest Interest Average Interest Interest Real estate mortgage loans: One-to-four-family $ 312 $ 14 $ 13 $ 455 $ 20 $ 18 Commercial and Multifamily 229 28 27 918 36 66 Construction and Land — — — 167 — 8 Commercial loans 390 21 23 525 27 28 Total $ 931 $ 63 $ 63 $ 2,065 $ 83 $ 120

Other Borrowings (Tables)

Other Borrowings (Tables)	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Summary of Federal Home Loan Bank Advances Classified as Short Term	As of September 30, 2017, the Company had the following FHLB advances ($ in thousands). At September 30, 2017 Maturing in the year ending Advance type Interest rate Amount 2017 Fixed Rate 1.29 % $ 5,000 2017 Fixed Rate 1.28 % 5,000 2017 Fixed Rate 1.20 % 8,000 2017 Fixed Rate 1.17 % 20,000 2018 Fixed Rate 1.27 % 10,000 $48,000

Fair Value of Financial Instr26

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Estimated Fair Value of Financial Instruments	The estimated fair values of the Company’s financial instruments are as follows (in thousands) At September 30, 2017 At December 31, 2016 Carrying Fair Carrying Fair Financial assets: Cash and cash equivalents (Level 1) $ 62,004 $ 62,004 $ 50,273 $ 50,273 Time deposits with banks (Level 1) 590 590 2,794 2,794 Securities available for sale (Level 2) 99,104 99,104 109,668 109,668 Loans held for sale (Level 3) 533 544 443 450 Loans (Level 3) 701,406 703,861 683,784 718,111 Federal Home Loan Bank stock (Level 3) 2,877 2,877 3,478 3,478 Accrued interest receivable (Level 3) 2,080 2,080 2,077 2,077 Financial liabilities: Deposits (Level 3) 749,050 748,226 729,949 729,553 FHLB Advances (Level 3) 48,000 47,910 65,000 64,975 Other borrowings (Level 3) 8,884 8,884 6,867 6,867 Subordinated notes (Level 3) 11,000 10,857 11,000 10,860 Off-balance-sheet — — — —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Summary of Securities Measured at Fair Value on a Recurring Basis	Securities available for sale measured at fair value on a recurring basis are summarized below (in thousands) At September 30, 2017: Fair Value Level 1 Level 2 Level 3 U.S. Government enterprise and agency obligations $ 12,429 — $ 12,429 — Agency Mortgage-backed securities 86,675 — 86,675 — Total $ 99,104 — $ 99,104 — At December 31, 2016: Fair Value Level 1 Level 2 Level 3 Federal Home Loan Bank obligations $ 3,002 — $ 3,002 — U.S. Government enterprise and agency obligations 15,253 — 15,253 — Agency Mortgage-backed securities 91,413 — 91,413 — Total $ 109,668 — $ 109,668 —
Impaired Collateral-Dependent Loans and Other Real Estate Owned Measured at Fair Value on a Nonrecurring Basis	Impaired collateral-dependent loans are carried at fair value when the current collateral value is lower than the carrying value of the loan. Those impaired collateral-dependent loans which are measured at fair value on a nonrecurring basis, excluding purchased credit impaired loans are as follows (in thousands) At Period End Total Losses Losses Recorded During the Period Fair Value Level 1 Level 2 Level 3 At September 30, 2017: One-to-four-family $ 309 — — $ 309 $ 15 — Commercial and Multifamily 204 — — 204 422 — Commercial 323 — — 323 35 — Total $ 836 — — $ 836 $ 472 — At December 31, 2016: Commercial and Multifamily $ 587 — — $ 587 $ 718 $ 73 Commercial 427 — — 427 72 — Total $ 1,014 — — $ 1,014 $ 790 $ 73 Other real estate owned which is measured at fair value on a nonrecurring basis is summarized below (in thousands) At Period End Total Losses Fair Level 1 Level 2 Level 3 At September 30, 2017 Other real estate owned $ — — — $ — — — At December 31, 2016 Other real estate owned $ 32 — — $ 32 — —

Employee Stock Ownership Plan28

Employee Stock Ownership Plan ("ESOP") (Tables)	9 Months Ended
	Sep. 30, 2017
Postemployment Benefits [Abstract]
Schedule of Employee Stock Ownership Plan	ESOP shares were as follows ($ in thousands, except per share amounts): At September 30, At December 31, Allocated shares 33,855 33,855 Unallocated shares 304,705 304,705 Total ESOP shares 338,560 338,560 Fair value of unallocated shares $ 7,081 $ 5,223

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Outstanding Stock Options and Restricted Stock	The following table summarizes the outstanding stock options and restricted stock: Stock Options Weighted Average Outstanding at January 1, 2017 800,190 $ 13.04 Granted — — Forfeited (11,300 ) $ 14.28 Exercised or Expired (76,964 ) $ 11.95 Outstanding at September 30, 2017 711,926 $ 13.15 Exercisable at September 30, 2017 321,010 $ 12.63 Unvested awards at September 30, 2017 390,916 $ 14.18 Restricted Stock Weighted Average Grant Non-vested 82,874 $ 13.97 Granted — — Forfeited (1,500 ) $ 13.96 Unvested awards at September 30, 2017 81,374 $ 13.97

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Summary of Bank's Capital Amount and Ratios and Regulatory Thresholds	The following table shows the Bank’s capital amounts and ratios and regulatory thresholds at September 30, 2017 and December 31, 2016. As of September 30, 2017 the Bank was “Well Capitalized” under all capital ratios. ($ in thousands) Actual Minimum for Capital Minimum to be Well Amount % Amount % Amount % September 30, 2017 Common Equity Tier 1 to Risk-Weighted Assets $ 98,802 13.18 % $ 33,736 4.50 % $ 48,729 6.50 % Tier I Capital to Risk-Weighted Assets 98,802 13.18 % 44,981 6.00 % 59,974 8.00 % Total Capital to Risk-Weighted Assets 102,500 13.67 % 59,974 8.00 % 74,968 10.00 % Tier I Capital to Total Assets 98,802 10.70 % 36,925 4.00 % 46,157 5.00 % December 31, 2016 Common Equity Tier 1 to Risk-Weighted Assets $ 93,083 12.93 % $ 32,387 4.50 % $ 46,781 6.50 % Tier I Capital to Risk-Weighted Assets 93,083 12.93 % 43,183 6.00 % 57,577 8.00 % Total Capital to Risk-Weighted Assets 96,357 13.39 % 57,577 8.00 % 71,971 10.00 % Tier I Capital to Total Assets 93,083 12.10 % 30,771 4.00 % 38,464 5.00 %

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Summary of Earnings Per Share	The shares purchased by the Employee Stock Ownership Plan are included in the weighted-average shares when they are committed to be released. ($ in thousands, except per share amounts) Three months Ended September 30, 2017 Three months Ended September 30, 2016 Net Income Available to Common Stockholders $ 1,576 $ 244 Weighted Average Shares 7,719,405 4,944,262 Basic income per share: $ 0.20 $ 0.05 Weighted Average Diluted Shares 7,978,532 4,955,143 Diluted income per share $ 0.20 $ 0.05 Nine months Ended September 30, 2017 Nine months Ended September 30, 2016 Net Income Available to Common Stockholders $ 5,007 $ 471 Weighted Average Shares 7,714,526 4,947,549 Basic income per share: $ 0.65 $ 0.10 Weighted Average Diluted Shares 7,934,401 4,960,023 Diluted income per share $ 0.63 $ 0.09

Organization and Significant 32

Organization and Significant Accounting Policies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017Office
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of banking offices	18

Business Combinations - Acquisi

Business Combinations - Acquisition of Florida Bank of Commerce - Additional Information (Detail) - USD ($) $ in Thousands	Oct. 31, 2016	Sep. 30, 2017
Florida Bank of Commerce [Member]
Business Acquisition [Line Items]
Business combination share exchange ratio	88.00%
CenterState Bank Corporation [Member]
Business Acquisition [Line Items]
Business combination share exchange ratio		89.00%
Termination fee payable		$ 7,070

Business Combinations - Schedul

Business Combinations - Schedule of Unaudited Pro Forma Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Business Acquisition, Pro Forma Information [Abstract]
Net interest income	$ 7,502	$ 21,638
Net income	$ 1,400	$ 3,658
Basic and Diluted Pro forma Earnings per share	$ 0.18	$ 0.47

Securities - Schedule of Securi

Securities - Schedule of Securities Classified as Available for Sale Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized cost	$ 100,154	$ 111,330
Gross Unrealized Gains	34	19
Gross Unrealized Losses	(1,084)	(1,681)
Available for sale securities, fair value	99,104	109,668
Federal Home Loan Bank Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized cost		3,000
Gross Unrealized Gains		2
Available for sale securities, fair value		3,002
US Government Enterprise and Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized cost	12,481	15,347
Gross Unrealized Gains	17	5
Gross Unrealized Losses	(69)	(99)
Available for sale securities, fair value	12,429	15,253
Agency Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Amortized cost	87,673	92,983
Gross Unrealized Gains	17	12
Gross Unrealized Losses	(1,015)	(1,582)
Available for sale securities, fair value	$ 86,675	$ 91,413

Securities - Scheduled Maturiti

Securities - Scheduled Maturities of Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available for sale securities, Due in one year or less at Amortized Cost	$ 2,000
Available for sale securities, Due from one year to five years at Amortized Cost	10,481
Available for sale securities, Amortized cost	100,154	$ 111,330
Available for sale securities, Due in one year or less at Fair Value	1,999
Available for sale securities, Due from after one year to five years at Fair Value	10,430
Available for sale securities, Fair Value	99,104	109,668
Agency Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Agency Mortgage-backed securities, Amortized Cost	87,673
Available for sale securities, Amortized cost	87,673	92,983
Agency Mortgage-backed securities, Fair Value	86,675
Available for sale securities, Fair Value	$ 86,675	$ 91,413

Securities - Schedule of Secu37

Securities - Schedule of Securities Gross Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Loss, Less Than Twelve Months	$ (891)
Fair Value, Less Than Twelve Months	78,808
Gross Unrealized Loss, Twelve Months or Greater	(193)
Fair Value, Twelve Months or Greater	7,817
Gross Unrealized Loss, Less Than Twelve Months		$ (1,681)
Fair Value, Less Than Twelve Months		87,187
Gross Unrealized Loss, Twelve Months or Greater		0
Fair Value, Twelve Months or Greater		0
US Government Enterprise and Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Loss, Less Than Twelve Months	(69)
Fair Value, Less Than Twelve Months	7,415
Gross Unrealized Loss, Less Than Twelve Months		(99)
Fair Value, Less Than Twelve Months		9,387
Gross Unrealized Loss, Twelve Months or Greater		0
Fair Value, Twelve Months or Greater		0
Agency Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Loss, Less Than Twelve Months	(822)
Fair Value, Less Than Twelve Months	71,393
Gross Unrealized Loss, Twelve Months or Greater	(193)
Fair Value, Twelve Months or Greater	$ 7,817
Gross Unrealized Loss, Less Than Twelve Months		(1,582)
Fair Value, Less Than Twelve Months		77,800
Gross Unrealized Loss, Twelve Months or Greater		0
Fair Value, Twelve Months or Greater		$ 0

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Millions	Sep. 30, 2017USD ($)Investmentsecurities	Dec. 31, 2016USD ($)Investmentsecurities
Investments, Debt and Equity Securities [Abstract]
Number of investment securities in a loss position	34	32
Number of investment securities in a loss position for greater than twelve months	3	0
Fair market value of pledged securities | $	$ 34.9	$ 22.1

Securities - Summary of Securit

Securities - Summary of Securities Available for Sale Sold (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Available-for-sale Securities [Abstract]
Proceeds received from sale	$ 9,238	$ 22,158
Gross Gains on sale	$ 77	$ 208

Loans - Schedule of Loan Portfo

Loans - Schedule of Loan Portfolio Segments and Classes (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Real estate loans:
Total loans	$ 705,457		$ 687,189
Deduct:
Deferred loan fees, net	(353)		(131)
Allowance for loan losses	(3,698)	$ (3,670)	(3,274)	$ (2,846)	$ (2,895)	$ (2,511)
Loans, net	701,406		683,784
Real Estate Mortgage Loans [Member]
Real estate loans:
Total loans	585,178		585,472
Deduct:
Allowance for loan losses	(2,835)	(2,993)	(2,473)	(1,941)	(2,240)	(1,354)
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member]
Real estate loans:
Total loans	131,628		155,262
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member]
Real estate loans:
Total loans	367,008		356,788
Real Estate Mortgage Loans [Member] | Construction and Land [Member]
Real estate loans:
Total loans	64,849		51,520
Real Estate Mortgage Loans [Member] | Home Equity [Member]
Real estate loans:
Total loans	21,693		21,902
Commercial Loans [Member]
Real estate loans:
Total loans	119,225		100,239
Deduct:
Allowance for loan losses	(731)	(660)	(469)	(812)	(606)	(583)
Consumer Loans [Member]
Real estate loans:
Total loans	1,054		1,478
Deduct:
Allowance for loan losses	$ (12)	$ (4)	$ (6)	$ (26)	$ (35)	$ (23)

Loans - Additional Information

Loans - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017USD ($)LoansPortfolios	Sep. 30, 2016Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of portfolio segments | Portfolios	3
Loan grading description	Commercial, multi-family and commercial real estate loans are generally reviewed periodically to determine the appropriate loan grading.
Troubled debt restructurings | Loans	0	0
Troubled debt restructurings that subsequently defaulted which were restructured | Loans	0	0
Total carrying amount of PCI loans	$ 3,200,000
Recorded investment of PCI loans	2,800,000
Accrual [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding TDRs	405,000
Non Accrual [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding TDRs	$ 71,000
Maximum [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term of loan repayment	10 years

Loans - Schedule of Change in A

Loans - Schedule of Change in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 3,670	$ 2,895	$ 3,274	$ 2,511	$ 2,511
Recorded investment in acquired loans accounted for under ASC 310-30 Loans Acquired with Deteriorated Credit Quality						$ 2,800
(Credit) Provision for loan losses				350
Balance in allowance for loan losses	3,670	2,895	3,698	2,846	2,511	3,698	$ 3,274
Charge-offs		(74)	(10)	(110)
Recoveries	28	25	434	95
Ending balance	3,698	2,846	3,698	2,846	3,274
Recorded investment						1,803	1,571
Balance in allowance for loan losses						15	31
Recorded investment						419,301	334,707
Balance in allowance for loan losses						3,088	2,395
Loans Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment in acquired loans accounted for under ASC 310-20 Loan Receivables						281,161	348,592
Balance in allowance for loan losses						595	848
Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment in acquired loans accounted for under ASC 310-30 Loans Acquired with Deteriorated Credit Quality						3,192	2,319
Real Estate Mortgage Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,993	2,240	2,473	1,354	1,354
(Credit) Provision for loan losses	(169)	(234)	(10)	647
Balance in allowance for loan losses	2,993	2,240	2,835	1,941	1,354	2,835	2,473
Charge-offs		(73)		(95)
Recoveries	11	8	372	35
Ending balance	2,835	1,941	2,835	1,941	2,473
Recorded investment						1,480	1,035
Balance in allowance for loan losses						15	21
Recorded investment						330,992	274,513
Balance in allowance for loan losses						2,285	1,687
Real Estate Mortgage Loans [Member] | Loans Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment in acquired loans accounted for under ASC 310-20 Loan Receivables						249,514	307,605
Balance in allowance for loan losses						535	765
Real Estate Mortgage Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment in acquired loans accounted for under ASC 310-30 Loans Acquired with Deteriorated Credit Quality						3,192	2,319
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	660	606	469	583	583
(Credit) Provision for loan losses	55	190	202	184
Balance in allowance for loan losses	660	606	731	812	583	731	469
Charge-offs		(1)		(12)
Recoveries	16	17	60	57
Ending balance	731	812	731	812	469
Recorded investment						323	500
Balance in allowance for loan losses							9
Recorded investment						87,864	59,586
Balance in allowance for loan losses						671	378
Commercial Loans [Member] | Loans Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment in acquired loans accounted for under ASC 310-20 Loan Receivables						31,038	40,153
Balance in allowance for loan losses						60	82
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	4	35	6	23	23
(Credit) Provision for loan losses	7	(9)	14	3
Balance in allowance for loan losses	4	35	12	26	23	12	6
Charge-offs			(10)	(3)
Recoveries	1		2	3
Ending balance	12	26	12	26	6
Recorded investment							36
Balance in allowance for loan losses							1
Recorded investment						445	608
Balance in allowance for loan losses						12	4
Consumer Loans [Member] | Loans Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Recorded investment in acquired loans accounted for under ASC 310-20 Loan Receivables						609	834
Balance in allowance for loan losses							1
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	13	14	326	551	551
(Credit) Provision for loan losses	107	53	(206)	(484)
Balance in allowance for loan losses	13	14	120	67	551	120	326
Ending balance	$ 120	$ 67	$ 120	$ 67	$ 326
Balance in allowance for loan losses						$ 120	$ 326

Loans - Summary of Loan Credit

Loans - Summary of Loan Credit Quality (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total	$ 705,457	$ 687,189
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	698,174	677,020
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,071	1,842
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,212	8,327
Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	585,178	585,472
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	131,628	155,262
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	129,643	153,965
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	406	490
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,579	807
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	367,008	356,788
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	363,591	351,096
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,419	730
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,998	4,962
Real Estate Mortgage Loans [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	64,849	51,520
Real Estate Mortgage Loans [Member] | Construction and Land [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	64,337	49,901
Real Estate Mortgage Loans [Member] | Construction and Land [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	246	543
Real Estate Mortgage Loans [Member] | Construction and Land [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	266	1,076
Real Estate Mortgage Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	21,693	21,902
Real Estate Mortgage Loans [Member] | Home Equity [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	21,371	21,902
Real Estate Mortgage Loans [Member] | Home Equity [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	30
Real Estate Mortgage Loans [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	292
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	119,225	100,239
Commercial Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	118,178	98,714
Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	970	79
Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	77	1,446
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,054	1,478
Consumer Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,054	1,442
Consumer Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		$ 36

Loans - Age Analysis of Past Du

Loans - Age Analysis of Past Due Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 3,679	$ 3,321
Current	700,671	683,577
Nonaccrual Loans	1,107	291
Total loans	705,457	687,189
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,146	3,047
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	533	274
Real Estate Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	585,178	585,472
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	188	775
Current	130,656	154,487
Nonaccrual Loans	784
Total loans	131,628	155,262
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	172	501
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	16	274
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	756	778
Current	366,112	355,755
Nonaccrual Loans	140	255
Total loans	367,008	356,788
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	756	778
Real Estate Mortgage Loans [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	508	1,519
Current	64,161	50,001
Nonaccrual Loans	180
Total loans	64,849	51,520
Real Estate Mortgage Loans [Member] | Construction and Land [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	12	1,519
Real Estate Mortgage Loans [Member] | Construction and Land [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	496
Real Estate Mortgage Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		22
Current	21,690	21,880
Nonaccrual Loans	3
Total loans	21,693	21,902
Real Estate Mortgage Loans [Member] | Home Equity [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		22
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,166	217
Current	117,059	100,022
Total loans	119,225	100,239
Commercial Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,145	217
Commercial Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	21
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	61	10
Current	993	1,432
Nonaccrual Loans		36
Total loans	1,054	1,478
Consumer Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 61	$ 10

Loans - Summary of Impaired Loa

Loans - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
With No Related Allowance Recorded, Recorded Investment	$ 527	$ 1,014
With No Related Allowance Recorded, Unpaid Principal Balance	984	2,025
With an Allowance Recorded, Recorded Investment	309	557
With an Allowance Recorded, Unpaid Principal Balance	309	561
With an Allowance Recorded, Related Allowance	15	31
Total Recorded Investment	1,803	1,571
Total Unpaid Principal Balance	2,260	2,586
With an Allowance Recorded, Related Allowance	15	31
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowance Recorded, Recorded Investment	784
With No Related Allowance Recorded, Unpaid Principal Balance	784
With an Allowance Recorded, Recorded Investment	309	448
With an Allowance Recorded, Unpaid Principal Balance	309	448
With an Allowance Recorded, Related Allowance	15	21
Total Recorded Investment	1,093	448
Total Unpaid Principal Balance	1,093	448
With an Allowance Recorded, Related Allowance	15	21
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowance Recorded, Recorded Investment	204	587
With No Related Allowance Recorded, Unpaid Principal Balance	626	1,568
Total Recorded Investment	204	587
Total Unpaid Principal Balance	626	1,568
Real Estate Mortgage Loans [Member] | Construction and Land [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowance Recorded, Recorded Investment	180
With No Related Allowance Recorded, Unpaid Principal Balance	180
Total Recorded Investment	180
Total Unpaid Principal Balance	180
Real Estate Mortgage Loans [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowance Recorded, Recorded Investment	3
With No Related Allowance Recorded, Unpaid Principal Balance	3
Total Recorded Investment	3
Total Unpaid Principal Balance	3
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
With No Related Allowance Recorded, Recorded Investment	323	427
With No Related Allowance Recorded, Unpaid Principal Balance	358	457
With an Allowance Recorded, Recorded Investment		73
With an Allowance Recorded, Unpaid Principal Balance		77
With an Allowance Recorded, Related Allowance		9
Total Recorded Investment	323	500
Total Unpaid Principal Balance	$ 358	534
With an Allowance Recorded, Related Allowance		9
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
With an Allowance Recorded, Recorded Investment		36
With an Allowance Recorded, Unpaid Principal Balance		36
With an Allowance Recorded, Related Allowance		1
Total Recorded Investment		36
Total Unpaid Principal Balance		36
With an Allowance Recorded, Related Allowance		$ 1

Loans - Summary of Average Net

Loans - Summary of Average Net Investment in Impaired Loans and Interest Income Recognized and Received on Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 845	$ 1,946	$ 931	$ 2,065
Interest Income Recognized	19	23	63	83
Interest Income Received	23	41	63	120
Construction and Land [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		73		167
Interest Income Received		6		8
Real Estate Mortgage Loans [Member] | One-to-Four Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	309	453	312	455
Interest Income Recognized	4	6	14	20
Interest Income Received	5	6	13	18
Real Estate Mortgage Loans [Member] | Commercial and Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	209	902	229	918
Interest Income Recognized	9	8	28	36
Interest Income Received	10	19	27	66
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	327	518	390	525
Interest Income Recognized	6	9	21	27
Interest Income Received	$ 8	$ 10	$ 23	$ 28

Other Borrowings - Additional I

Other Borrowings - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Other Borrowings [Abstract]
Federal Home Loan Bank stock	$ 2,877,000	$ 3,478,000
FHLB maximum borrowing capacity	238,800,000
FHLB, advances secured through collateral agreement	136,200,000
Total credit availability under FHLB	88,200,000
Sweep agreements with customers	8,900,000	$ 6,900,000
Pledged securities as collateral	$ 11,700,000

Other Borrowings - Summary of F

Other Borrowings - Summary of Federal Home Loan Bank Advances Classified as Short Term (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Federal Home Loan Bank, Advances [Line Items]
FHLB advances fixed rate	$ 48,000
1.29% Fixed Rate Advances Due 2017 [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances Maturity Year	2,017
FHLB advances fixed rate	$ 5,000
FHLB advances fixed interest rate	1.29%
1.28% Fixed Rate Advances Due 2017 [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances Maturity Year	2,017
FHLB advances fixed rate	$ 5,000
FHLB advances fixed interest rate	1.28%
1.20% Fixed Rate Advances Due 2017 [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances Maturity Year	2,017
FHLB advances fixed rate	$ 8,000
FHLB advances fixed interest rate	1.20%
1.17% Fixed Rate Advances Due 2017 [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances Maturity Year	2,017
FHLB advances fixed rate	$ 20,000
FHLB advances fixed interest rate	1.17%
1.27% Fixed Rate Advances Due 2018 [Member]
Federal Home Loan Bank, Advances [Line Items]
Federal Home Loan Bank Advances Maturity Year	2,018
FHLB advances fixed rate	$ 10,000
FHLB advances fixed interest rate	1.27%

Subordinated Notes - Additional

Subordinated Notes - Additional Information (Detail) $ in Thousands	Mar. 30, 2016USD ($)Investor	Sep. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Subordinated notes, principal amount		$ 11,000	$ 11,000
Subordinated Notes [Member]
Debt Instrument [Line Items]
Percentage of subordinated notes sold	100.00%
Subordinated notes, principal amount	$ 11,000
Number of accredited investors to whom notes sold | Investor	2
Subordinated notes, fixed interest rate	5.00%
Subordinated notes, maturity date	Apr. 1, 2021
Subordinated notes, term	5 years
Subordinated Notes [Member] | Director [Member]
Debt Instrument [Line Items]
Principal amount of notes purchased by director	$ 7,000

Fair Value of Financial Instr50

Fair Value of Financial Instruments - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Financial assets:
Cash and cash equivalents	$ 62,004	$ 50,273	$ 55,271	$ 59,344
Time deposits with banks	590	2,794
Securities available for sale	99,104	109,668
Loans held for sale	533	443
Loans	701,406	683,784
Federal Home Loan Bank stock	2,877	3,478
Accrued interest receivable	2,080	2,077
Financial liabilities:
Deposits	749,050	729,949
FHLB Advances	48,000
Other borrowings	56,884	71,867
Subordinated Notes	11,000	11,000
Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and cash equivalents	62,004	50,273
Time deposits with banks	590	2,794
Fair Value [Member] | Level 2 [Member]
Financial assets:
Securities available for sale	99,104	109,668
Fair Value [Member] | Level 3 [Member]
Financial assets:
Loans held for sale	544	450
Loans	703,861	718,111
Federal Home Loan Bank stock	2,877	3,478
Accrued interest receivable	2,080	2,077
Financial liabilities:
Deposits	748,226	729,553
FHLB Advances	47,910	64,975
Other borrowings	8,884	6,867
Subordinated notes	10,857	10,860
Off-balance-sheet financial instruments	0	0
Carrying Amount [Member] | Level 1 [Member]
Financial assets:
Cash and cash equivalents	62,004	50,273
Time deposits with banks	590	2,794
Carrying Amount [Member] | Level 2 [Member]
Financial assets:
Securities available for sale	99,104	109,668
Carrying Amount [Member] | Level 3 [Member]
Financial assets:
Loans held for sale	533	443
Loans	701,406	683,784
Federal Home Loan Bank stock	2,877	3,478
Accrued interest receivable	2,080	2,077
Financial liabilities:
Deposits	749,050	729,949
FHLB Advances	48,000	65,000
Other borrowings	8,884	6,867
Subordinated Notes	11,000	11,000
Off-balance-sheet financial instruments	$ 0	$ 0

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Securities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value	$ 99,104	$ 109,668
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value	99,104	109,668
Fair Value, Measurements, Recurring [Member] | Federal Home Loan Bank Obligations [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value		3,002
Fair Value, Measurements, Recurring [Member] | US Government Enterprise and Agency Obligations [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value	12,429	15,253
Fair Value, Measurements, Recurring [Member] | Agency Mortgage Backed Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value	86,675	91,413
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value	99,104	109,668
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Federal Home Loan Bank Obligations [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value		3,002
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | US Government Enterprise and Agency Obligations [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value	12,429	15,253
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Agency Mortgage Backed Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Available for sale securities, fair value	$ 86,675	$ 91,413

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair value measurement transfers between levels	$ 0	$ 0	$ 0	$ 0

Fair Value Measurements - Impai

Fair Value Measurements - Impaired Collateral-Dependent Loans and Other Real Estate Owned Measured at Fair Value on a Nonrecurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned amount				$ 32
Losses Recorded During the Year	$ 74	$ 10	$ 110
Real Estate Mortgage Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Losses Recorded During the Year	$ 73		$ 95
Fair Value on a Nonrecurring Basis [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		836		1,014
Other real estate owned amount				32
Total Losses		472		790
Losses Recorded During the Year				73
Fair Value on a Nonrecurring Basis [Member] | Real Estate Mortgage Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		323		427
Total Losses		35		72
Fair Value on a Nonrecurring Basis [Member] | One-to-Four Family Residential [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		309
Total Losses		15
Fair Value on a Nonrecurring Basis [Member] | Commercial and Multi-Family [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		204		587
Total Losses		422		718
Losses Recorded During the Year				73
Fair Value on a Nonrecurring Basis [Member] | Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		836		1,014
Other real estate owned amount				32
Fair Value on a Nonrecurring Basis [Member] | Level 3 [Member] | Real Estate Mortgage Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		323		427
Fair Value on a Nonrecurring Basis [Member] | Level 3 [Member] | One-to-Four Family Residential [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		309
Fair Value on a Nonrecurring Basis [Member] | Level 3 [Member] | Commercial and Multi-Family [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value of Loan		$ 204		$ 587

Employee Stock Ownership Plan54

Employee Stock Ownership Plan ("ESOP") - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017USD ($)Installmentshares	Dec. 31, 2016shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares acquired by ESOP on conversion	338,560	338,560
Exchange of note payable | $	$ 3,385,600
Notes payable, number of installments | Installment	30
ESOP Allocated shares	33,855	33,855

Employee Stock Ownership Plan55

Employee Stock Ownership Plan ("ESOP") - Schedule of Employee Stock Ownership Plan (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Postemployment Benefits [Abstract]
Allocated shares	33,855	33,855
Unallocated shares	304,705	304,705
Total ESOP shares	338,560	338,560
Fair value of unallocated shares	$ 7,081	$ 5,223

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2014	Sep. 28, 2016	Sep. 27, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining contractual term	7 years 10 months 25 days
Aggregate intrinsic value	$ 7,200,000
Weighted average remaining contractual term	7 years 4 months 24 days
Aggregate intrinsic value	$ 3,600,000
Unrecognized compensation cost related to options	849,000
Unrecognized compensation cost related to non-vested stock awards granted	853,000
Compensation cost	501,000	$ 637,000
Implied tax benefit	125,000
Aggregate intrinsic value, non- exercisable options	3,600,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	223,000
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 278,000
2015 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award, vesting period			5 years
Shares authorized under equity incentive plan				592,480	742,480

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Outstanding Stock Options and Restricted Stock (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Options Outstanding, Beginning Balance	800,190
Stock Options, Granted	0
Stock Options, Forfeited	(11,300)
Stock Options, Exercised or Expired	(76,964)
Stock Options Outstanding, Ending Balance	711,926
Stock Options, Exercisable		321,010
Restricted Stock Awards, Unvested awards		390,916
Weighted Average Exercise Price, Stock Options Outstanding, Beginning Balance	$ 13.04
Weighted Average Exercise Price, Stock Options, Granted	0
Weighted Average Exercise Price, Stock Options, Forfeited	$ 14.28
Weighted Average Exercise Price, Stock Options, Exercised or Expired	11.95
Weighted Average Exercise Price, Stock Options Outstanding, Ending Balance	$ 13.15
Weighted Average Exercise Price, Stock Options, Exercisable		$ 12.63
Weighted Average Exercise Price, Stock Options, Unvested awards		$ 14.18
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Awards Non-vested, Beginning Balance	82,874
Restricted Stock Awards, Granted	0
Restricted Stock Awards, Forfeited	(1,500)
Restricted Stock Awards, Unvested awards		81,374
Weighted Average Grant Date Fair Value, Restricted Stock Awards Non-vested, Beginning Balance	$ 13.97
Weighted Average Grant Date Fair Value, Restricted Stock Awards, Granted	0
Weighted Average Grant Date Fair Value, Restricted Stock Awards, Forfeited	13.96
Weighted Average Grant Date Fair Value, Restricted Stock Awards, Unvested awards	$ 13.97	$ 13.97

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Maximum asset value required to be exempted from consolidated capital requirements	$ 1,000,000,000
Common equity tier 1 ratio of risk- weighted assets	13.18%	12.93%
Tier 1 capital ratio of risk-weighted assets	13.18%	12.93%
Total capital ratio of risk-weighted assets	13.67%	13.39%
Leverage ratio	10.70%	12.10%
Capital conservation buffer	5.67%
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 ratio of risk- weighted assets	4.50%
Tier 1 capital ratio of risk-weighted assets	6.00%
Total capital ratio of risk-weighted assets	8.00%
Leverage ratio	4.00%
Capital conservation buffer	1.25%

Regulatory Matters - Summary of

Regulatory Matters - Summary of Bank's Capital Amount and Ratios and Regulatory Thresholds (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Amount	$ 98,802	$ 93,083
Tier I Capital to Risk-Weighted Assets, Actual Amount	98,802	93,083
Total Capital to Risk-Weighted Assets, Actual Amount	102,500	96,357
Tier I Capital to Total Assets, Actual Amount	$ 98,802	$ 93,083
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Ratio	13.18%	12.93%
Tier I Capital to Risk-Weighted Assets, Actual Ratio	13.18%	12.93%
Total Capital to Risk-Weighted Assets, Actual Ratio	13.67%	13.39%
Tier I Capital to Total Assets, Actual Ratio	10.70%	12.10%
Common Equity Tier I Capital to Risk-Weighted Assets, Minimum for Capital Adequacy Purposes Amount	$ 33,736	$ 32,387
Tier I Capital to Risk-Weighted Assets, Minimum for Capital Adequacy Purposes Amount	44,981	43,183
Total Capital to Risk-Weighted Assets, Minimum for Capital Adequacy Purposes Amount	59,974	57,577
Tier I Capital to Total Assets, Minimum for Capital Adequacy Purposes Amount	$ 36,925	$ 30,771
Common Equity Tier I Capital to Risk-Weighted Assets, Minimum for Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier I Capital to Risk-Weighted Assets, Minimum for Capital Adequacy Purposes Ratio	6.00%	6.00%
Total Capital to Risk-Weighted Assets, Minimum for Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier I Capital to Total Assets, Minimum for Capital Adequacy Purposes Ratio	4.00%	4.00%
Common Equity Tier I Capital to Risk-Weighted Assets, Minimum to be Well Capitalized Amount	$ 48,729	$ 46,781
Tier I Capital to Risk-Weighted Assets, Minimum to be Well Capitalized Amount	59,974	57,577
Total Capital to Risk-Weighted Assets, Minimum to be Well Capitalized Amount	74,968	71,971
Tier I Capital to Total Assets	$ 46,157	$ 38,464
Common Equity Tier I Capital to Risk-Weighted Assets, Minimum to be Well Capitalized Ratio	6.50%	6.50%
Tier I Capital to Risk-Weighted Assets, Minimum to be Well Capitalized Ratio	8.00%	8.00%
Total Capital to Risk-Weighted Assets, Minimum to be Well Capitalized Ratio	10.00%	10.00%
Tier I Capital to Total Assets, Minimum to be Well Capitalized Ratio	5.00%	5.00%

Earnings per Share - Summary of

Earnings per Share - Summary of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Income Available to Common Stockholders	$ 1,576	$ 244	$ 5,007	$ 471
Weighted Average Shares	7,719,405	4,944,262	7,714,526	4,947,549
Basic income per share:	$ 0.20	$ 0.05	$ 0.65	$ 0.10
Weighted Average Diluted Shares	7,978,532	4,955,143	7,934,401	4,960,023
Diluted income per share	$ 0.20	$ 0.05	$ 0.63	$ 0.09