Pacific Continental 10-Q 1 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 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	PCBK
Entity Registrant Name	PACIFIC CONTINENTAL CORP
Entity Central Index Key	1,084,717
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		22,772,483

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks	$ 27,748	$ 30,154
Interest-bearing deposits with banks	42,530	36,959
Total cash and cash equivalents	70,278	67,113
Securities available-for-sale	453,660	470,996
Loans, net of deferred fees	1,882,842	1,857,767
Allowance for loan losses	(23,363)	(22,454)
Net loans	1,859,479	1,835,313
Interest receivable	6,502	7,107
Federal Home Loan Bank stock	7,084	5,423
Property and equipment, net of accumulated depreciation	19,302	20,208
Goodwill and intangible assets	68,969	70,382
Deferred tax asset	11,281	12,722
Other real estate owned	9,900	12,068
Bank-owned life insurance	35,840	35,165
Other assets	4,328	4,940
Total assets	2,546,623	2,541,437
Deposits
Noninterest-bearing demand	906,015	858,996
Savings and interest-bearing checking	1,055,648	1,110,224
Core time deposits	54,625	65,847
Total core deposits	2,016,288	2,035,067
Other deposits	81,869	113,036
Total deposits	2,098,157	2,148,103
Securities sold under agreements to repurchase	2,031	1,966
Federal Home Loan Bank borrowings	101,000	65,000
Subordinated debentures	34,167	34,096
Junior subordinated debentures	11,428	11,311
Accrued interest and other payables	9,262	7,206
Total liabilities	2,256,045	2,267,682
Shareholders' equity
Common stock, no par value, shares authorized: 50,000,000; shares issued and outstanding: 22,772,400 at September 30, 2017, and 22,611,535 at December 31, 2016	205,961	205,584
Retained earnings	85,286	70,486
Accumulated other comprehensive loss	(669)	(2,315)
Total shareholders' equity	290,578	273,755
Total liabilities and shareholders' equity	$ 2,546,623	$ 2,541,437

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common stock, no par value
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	22,772,400	22,611,535
Common stock, shares outstanding	22,772,400	22,611,535

Consolidated Statements of Inco

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 and dividend income
Loans	$ 23,916	$ 20,145	$ 71,282	$ 55,810
Taxable securities	2,247	1,995	6,819	5,551
Tax-exempt securities	498	482	1,510	1,435
Interest-bearing deposits with banks	149	40	335	104
Total interest and dividend income	26,810	22,662	79,946	62,900
Interest expense
Deposits	1,216	984	3,597	2,678
Federal Home Loan Bank borrowings	398	286	1,205	758
Subordinated debentures	590	553	1,735	553
Junior subordinated debentures	105	66	293	179
Federal funds purchased		2	1	6
Total interest expense	2,309	1,891	6,831	4,174
Net interest income	24,501	20,771	73,115	58,726
Provision for loan losses	350	1,380	3,725	3,575
Net interest income after provision for loan losses	24,151	19,391	69,390	55,151
Noninterest income
Service charges on deposit accounts	686	717	2,119	2,099
Bankcard income	338	314	968	899
Bank-owned life insurance income	226	172	675	463
Net gain on sale of investment securities				309
Impairment losses on investment securities (OTTI)	(7)	(2)	(9)	(19)
Other noninterest income	645	718	2,797	1,726
Total noninterest income	1,888	1,919	6,550	5,477
Noninterest expense
Salaries and employee benefits	7,554	7,520	25,830	23,084
Property and equipment	1,323	1,202	3,929	3,404
Data processing	1,062	924	3,137	2,682
Legal and professional services	576	569	1,789	2,321
Business development	319	460	1,299	1,492
FDIC insurance assessment	297	273	989	848
Other real estate expense (income)	48	71	20	(32)
Merger related expense	176	1,767	1,429	3,745
Other noninterest expense	1,453	1,039	3,846	3,222
Total noninterest expense	12,808	13,825	42,268	40,766
Income before provision for income taxes	13,231	7,485	33,672	19,862
Provision for income taxes	4,606	2,634	11,370	6,946
Net income	$ 8,625	$ 4,851	$ 22,302	$ 12,916
Earnings per share
Basic	$ 0.38	$ 0.24	$ 0.98	$ 0.65
Diluted	$ 0.38	$ 0.23	$ 0.97	$ 0.64
Weighted average shares outstanding
Basic	22,772,393	20,511,392	22,719,181	19,940,709
Common stock equivalents attributable to stock-based awards	167,018	165,572	162,032	154,813
Diluted	22,939,411	20,676,964	22,881,213	20,095,522

Consolidated Statements of Comp

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	$ 8,625	$ 4,851	$ 22,302	$ 12,916
Available-for-sale securities:
Unrealized gain (loss) arising during the period	17	(1,929)	2,781	5,397
Reclassification adjustment for gains realized in net income				(309)
Other than temporary impairment	7	2	9	19
Income tax effects	(9)	751	(1,088)	(1,991)
Derivative agreements-cash flow hedge
Unrealized gain (loss) arising during the period		160	(14)	(944)
Reclassification adjustment for gains realized in net income			35
Income tax effects		(62)	(77)	368
Total other comprehensive income (loss), net of tax	15	(1,078)	1,646	2,540
Total comprehensive income	$ 8,640	$ 3,773	$ 23,948	$ 15,456

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2015	$ 218,491	$ 156,099	$ 59,693	$ 2,699
Balance, shares at Dec. 31, 2015		19,604,182
Net income	19,776		19,776
Other comprehensive income (loss), net of tax	(5,014)			(5,014)
Comprehensive income	14,762
Stock issuance and related tax benefit	734	$ 734
Stock issuance and related tax benefit, shares		153,991
Stock issued through acquisition	47,794	$ 47,794
Stock issued through acquisition, shares		2,853,362
Share-based compensation expense	1,853	$ 1,853
Vested employee RSUs and SARs surrendered to cover tax consequences	(896)	(896)
Cash dividends	(8,983)		(8,983)
Balance at Dec. 31, 2016	273,755	$ 205,584	70,486	(2,315)
Balance, shares at Dec. 31, 2016		22,611,535
Net income	22,302		22,302
Other comprehensive income (loss), net of tax	1,646			1,646
Comprehensive income	23,948
Stock issuance and related tax benefit	861	$ 861
Stock issuance and related tax benefit, shares		160,865
Share-based compensation expense	1,042	$ 1,042
Vested employee RSUs and SARs surrendered to cover tax consequences	(1,526)	(1,526)
Cash dividends	(7,502)		(7,502)
Balance at Sep. 30, 2017	$ 290,578	$ 205,961	$ 85,286	$ (669)
Balance, shares at Sep. 30, 2017		22,772,400,000

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Cash dividends per share	$ 0.33	$ 0.44
Retained Earnings [Member]
Cash dividends per share	$ 0.33	$ 0.44

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 22,302	$ 12,916
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization, net of accretion	5,947	4,919
Deferred income taxes	(1)	3
Bank-owned life insurance income	(675)	(469)
Share-based compensation	1,192	1,427
Provision for loan losses	3,725	3,575
Gain on sale of investment securities		(309)
Valuation adjustment on foreclosed assets		162
Gain on sale of foreclosed assets	(91)	(302)
Other than temporary impairment on investment securities	9	19
Change in:
Interest receivable	605	698
Deferred loan fees	(169)	381
Accrued interest payable and other liabilities	2,094	(1,991)
Other assets	1,520	(1,073)
Net cash provided by operating activities	36,458	19,956
Cash flows from investing activities:
Proceeds from maturities and sales of available-for-sale investment securities	41,529	135,319
Purchase of available-for-sale investment securities	(25,308)	(160,943)
Net loan principal originations	(27,905)	(133,405)
Proceeds from sale of foreclosed assets	2,442	1,371
Net purchase of property and equipment	(342)	(2,196)
(Purchase) Redemption of Federal Home Loan Bank stock	(1,661)	1,097
Cash consideration received, net of cash acquired in merger		43,855
Net cash used by investing activities	(11,245)	(114,902)
Cash flows from financing activities:
Change in deposits	(49,946)	169,032
Change in repurchase agreements	65	1,036
Change in Federal Home Loan Bank short-term borrowings	36,000	(19,500)
FHLB term advances paid off		(12,500)
Proceeds from stock options exercised	861	620
Excess tax benefit from stock options exercised		41
Proceeds from subordinated debenture issuance		34,072
Dividends paid	(7,502)	(6,497)
Vested employee RSUs and SARs surrendered to cover tax consequences	(1,526)	(861)
Net cash (used)/provided by financing activities	(22,048)	165,443
Net change in cash and cash equivalents	3,165	70,497
Cash and cash equivalents, beginning of period	67,113	36,675
Cash and cash equivalents, end of period	70,278	107,172
Noncash investing and financing activities:
Transfer of loans to other real estate owned	183	958
Change in fair value of securities, net of deferred income taxes	(1,187)	3,116
Change in fair value of cash flow hedge, net of deferred income taxes		(576)
Cash paid during the period for:
Income taxes	9,098	7,667
Interest	$ 6,336	$ 3,653

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	NOTE 1—BASIS OF PRESENTATION The accompanying interim consolidated financial statements include the accounts of Pacific Continental Corporation (the “Company”), a bank holding company, and its wholly owned subsidiary, Pacific Continental Bank (the “Bank”), and the Bank’s wholly owned subsidiaries, PCB Services Corporation and PCB Loan Services Corporation (both of which are presently inactive). All significant intercompany accounts and transactions have been eliminated in consolidation. The accompanying consolidated financial statements have been prepared by the Company without audit and in conformity with generally accepted accounting principles in the United States of America for interim financial information. The consolidated financial statements include all adjustments and normal accruals, which the Company considers necessary for a fair presentation of the results of operations for such interim periods. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, as of the date of the balance sheets and income and expenses for the periods. Material estimates particularly susceptible to material change include allowance for loan losses, goodwill and intangibles and other real estate owned are particularly susceptible to change, and actual results could differ from those estimates. The balance sheet data as of December 31, 2016, was derived from audited consolidated financial statements, but does not include all disclosures contained in the Company’s 2016 Form 10-K. 10-K.

Securities Available-for-Sale

Securities Available-for-Sale	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Securities Available-for-Sale	NOTE 2 – SECURITIES AVAILABLE-FOR-SALE The amortized cost and estimated fair values of securities available-for-sale Amortized Gross Gross Estimated Value Percentage Unrealized Loss Positions Obligations of U.S. government agencies $ 2,000 $ — $ (25 ) $ 1,975 0.44 % Obligations of states and political subdivisions 27,060 — (513 ) 26,547 5.85 % Private-label mortgage-backed securities 10 — — 10 0.00 % Mortgage-backed securities 233,868 — (4,113 ) 229,755 50.64 % SBA pools 19,649 — (298 ) 19,351 4.27 % $ 282,587 $ — $ (4,949 ) $ 277,638 61.20 % Unrealized Gain Positions Obligations of U.S. government agencies $ 23,270 $ 425 $ — $ 23,695 5.22 % Obligations of states and political subdivisions 81,446 2,481 — 83,927 18.50 % Private-label mortgage-backed securities 1,309 199 — 1,508 0.33 % Mortgage-backed securities 48,558 552 — 49,110 10.83 % SBA pools 17,586 196 — 17,782 3.92 % $ 172,169 $ 3,853 $ — $ 176,022 38.80 % $ 454,756 $ 3,853 $ (4,949 ) $ 453,660 100.00 % At September 30, 2017, the Bank held 469 investment securities, of which 167 were in unrealized loss positions. Unrealized losses existed on certain securities classified as obligations of U.S. government agencies, private-label mortgage-backed securities, mortgage-backed securities, SBA pools and obligations of states and political subdivisions. The unrealized losses on all securities are deemed to be temporary, as these securities retain strong credit ratings, continue to perform adequately, and are backed by various government sponsored enterprises. These decreases in fair value are associated with the changes in market interest rates or the widening of market spreads subsequent to the initial purchase of the securities, and not due to concerns regarding the underlying credit of the issuers or the underlying collateral. The decline in value of these securities has resulted from changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at September 30, 2017. The following table presents a summary of securities in a continuous unrealized loss position at September 30, 2017: Securities in Gross in Loss Position for 12 Months Securities in Gross in Loss Position for 12 Months or Longer Obligations of U.S. government agencies $ 1,975 $ (25 ) $ — $ — Obligations of states and political subdivisions 12,204 (152 ) 14,343 (361 ) Private-label mortgage-backed securities 10 — — — Mortgage-backed securities 171,984 (2,580 ) 57,771 (1,533 ) SBA pools 7,949 (102 ) 11,402 (196 ) $ 194,122 $ (2,859 ) $ 83,516 $ (2,090 ) On a monthly basis, management reviews all private-label mortgage-backed securities for the presence of other than temporary impairment (“OTTI”). The Bank recorded $9 and $19 of OTTI during the nine months ended September 30, 2017 and 2016, respectively, with $7 and $2 of additional OTTI booked during the three months ended September 30, 2017 and 2016, respectively. Management’s evaluation included the use of independently-generated third-party credit surveillance reports that analyze the loans underlying each security. These reports include estimates of default rates and severities, life collateral loss rates and static voluntary prepayment assumptions to generate estimated cash flows at the individual security level. Additionally, management considered factors such as downgraded credit ratings, severity and duration of the impairments, the stability of the issuers and any discounts paid when the securities were purchased. Management has considered all available information related to the collectability of the impaired investment securities and believes that the estimated credit loss is appropriate. Following is a tabular roll-forward of the aggregate amount of credit-related OTTI at the beginning and end of the periods presented along with the amounts recognized in earnings during the three months and nine months ended September 30, 2017 and 2016: Three months ended Nine months ended 2017 2016 2017 2016 Balance, beginning of period: $ 272 $ 266 $ 270 $ 249 Additions: Initial OTTI credit loss 7 2 9 19 Balance, end of period: $ 279 $ 268 $ 279 $ 268 At September 30, 2017, nine of the Company’s private-label mortgage-backed securities, with an aggregate amortized cost of $1,055, were classified as substandard as their underlying credit was considered impaired. At December 31, 2016, nine securities with an aggregate amortized cost of $1,338 were classified as substandard. At September 30, 2017 and December 31, 2016, the projected average life of the securities portfolio was 4.51 years and 4.94 years, respectively. The amortized cost and estimated fair values of securities available-for-sale Amortized Gross Gross Estimated Percentage Unrealized Loss Positions Obligations of U.S. government agencies $ 3,995 $ — $ (49 ) $ 3,946 0.84 % Obligations of states and political subdivisions 41,016 — (1,279 ) 39,737 8.44 % Private-label mortgage-backed securities 241 — (23 ) 218 0.05 % Mortgage-backed securities 221,835 — (5,362 ) 216,473 45.96 % SBA pools 26,758 — (493 ) 26,265 5.58 % $ 293,845 $ — $ (7,206 ) $ 286,639 60.86 % Unrealized Gain Positions Obligations of U.S. government agencies $ 21,290 $ 384 $ — $ 21,674 4.60 % Obligations of states and political subdivisions 69,148 1,854 — 71,002 15.07 % Private-label mortgage-backed securities 1,566 153 — 1,719 0.36 % Mortgage-backed securities 72,752 811 — 73,563 15.62 % SBA pools 16,281 118 — 16,399 3.48 % $ 181,037 $ 3,320 $ — $ 184,357 39.14 % $ 474,882 $ 3,320 $ (7,206 ) $ 470,996 100.00 % At December 31, 2016, the Bank held 485 investment securities, of which 179 were in unrealized loss positions. The following table presents a summary of securities in a continuous unrealized loss position at December 31, 2016: Securities in Gross in Loss Position for 12 Months Securities in Gross in Loss Position for 12 Months or Longer Obligations of U.S. government agencies $ 3,946 $ (49 ) $ — $ — Obligations of states and political subdivisions 39,737 (1,279 ) — — Private-label mortgage-backed securities — — 218 (23 ) Mortgage-backed securities 211,721 (5,266 ) 4,752 (96 ) SBA pools 22,076 (458 ) 4,189 (35 ) $ 277,480 $ (7,052 ) $ 9,159 $ (154 ) The amortized cost and estimated fair value of securities at September 30, 2017, by maturity, are shown below. Obligations of U.S. government agencies, states and political subdivisions and corporate securities are shown by contractual maturity. Mortgage-backed securities and SBA variable pools are shown by projected average life. September 30, 2017 Amortized Estimated Value Due in one year or less $ 24,349 $ 24,340 Due after one year through 5 years 237,873 237,754 Due after 5 years through 10 years 156,651 155,892 Due after 10 years 35,883 35,674 $ 454,756 $ 453,660 During the quarter ended September 30, 2017, there were no investment securities sold. During the quarter ended September 30, 2016, 30 investment securities were sold resulting in proceeds of $54,426. The sales generated a gross gain of $552 and a gross loss of $243, totaling a net gain of $309. The following table presents investment securities which were pledged to secure public deposits and repurchase agreements as permitted or required by law: September 30, 2017 December 31, 2016 Amortized Estimated Value Amortized Estimated Value Pledged to secure public deposits $ 23,025 $ 23,630 $ 25,257 $ 25,683 Pledged to secure repurchase agreements 4,973 4,944 3,579 3,573 $ 27,998 $ 28,574 $ 28,836 $ 29,256 At September 30, 2017 and December 31, 2016, there was an outstanding balance for repurchase agreements of $2,031 and $1,966, respectively.

Loans, Allowance for Loan Losse

Loans, Allowance for Loan Losses, and Credit Quality Indicators	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Loans, Allowance for Loan Losses, and Credit Quality Indicators	NOTE 3 - LOANS, ALLOWANCE FOR LOAN LOSSES, AND CREDIT QUALITY INDICATORS Loans are stated at the amount of unpaid principal net of loan premiums or discounts for purchased loans, net of deferred loan origination fees, discounts associated with retained portions of loans sold, and an allowance for loan losses. Interest on loans is calculated using the simple-interest method on daily balances of the principal amount outstanding. Loan origination fees, net of origination costs and discounts, are amortized over the lives of the loans as adjustments to yield. Major classifications of period-end September 30, % of Gross December 31, % of Gross Real estate loans Multi-family residential $ 85,732 4.55 % $ 74,340 4.00 % Residential 1-4 61,379 3.26 % 61,548 3.31 % Owner-occupied commercial 465,536 24.70 % 461,557 24.82 % Nonowner-occupied commercial 453,895 24.08 % 451,893 24.30 % Total permanent real estate loans 1,066,542 56.59 % 1,049,338 56.43 % Construction loans Multi-family residential 19,711 1.05 % 22,252 1.20 % Residential 1-4 48,274 2.56 % 43,532 2.34 % Commercial real estate 96,426 5.12 % 76,301 4.10 % Commercial bare land and acquisition & development 8,635 0.46 % 15,081 0.81 % Residential bare land and acquisition & development 8,836 0.47 % 10,645 0.57 % Total construction real estate loans 181,882 9.66 % 167,811 9.02 % Total real estate loans 1,248,424 66.25 % 1,217,149 65.45 % Commercial loans 619,266 32.85 % 630,491 33.89 % Consumer loans 2,855 0.15 % 2,922 0.16 % Other loans 14,148 0.75 % 9,225 0.50 % Gross loans 1,884,693 100.00 % 1,859,787 100.00 % Deferred loan origination fees (1,851 ) (2,020 ) 1,882,842 1,857,767 Allowance for loan losses (23,363 ) (22,454 ) Total loans, net of allowance for loan losses and net deferred fees $ 1,859,479 $ 1,835,313 At September 30, 2017, outstanding loans to dental professionals totaled $390,333 and represented 20.71% of total outstanding loan principal balances compared to dental professional loans of $377,478, or 20.30% of total outstanding loan principal balance, at December 31, 2016. Additional information about the Company’s dental portfolio can be found in Note 4 to these consolidated financial statements. As of September 30, 2017, there were no other industry concentrations in excess of 10% of the total loan portfolio. However, as of September 30, 2017, 66.25% of the Company’s loan portfolio was collateralized by real estate and is, therefore, susceptible to change based on local market conditions. While appropriate action is taken to manage identified concentration risks, management believes that the loan portfolio is well diversified by geographic location and among industry groups. Purchased Credit Impaired Loans The following table represents the contractually required principal balance of purchased credit impaired loans and the carrying balance at September 30, 2017 and December 31, 2016: September 30, December 31, Contractually required principal payments for purchased credit impaired loans $ 18,883 $ 22,941 Accretable yield (1,173 ) (1,453 ) Nonaccretable yield (582 ) (809 ) Balance of purchased credit impaired loans $ 17,128 $ 20,679 The following tables summarize the changes in the accretable yield for purchased credit impaired loans for the three and nine months ended September 30, 2017 and 2016: Three months ended September 30, 2017 2016 Capital Foundation Total Century Capital Foundation Total Balance, beginning of period $ 682 $ 1,324 $ 2,006 $ — $ 860 $ — $ 860 Additions — — — — — 908 908 Accretion to interest income (45 ) (46 ) (91 ) — (50 ) (22 ) (72 ) Balance, end of period $ 637 $ 1,278 $ 1,915 $ — $ 810 $ 886 $ 1,696 Nine months ended September 30, 2017 2016 Capital Foundation Total Century Capital Foundation Total Balance, beginning of period $ 765 $ 688 $ 1,453 $ 39 $ 1,030 $ — $ 1,069 Additions — 742 742 — — 908 908 Accretion to interest income (128 ) (152 ) (280 ) (39 ) (220 ) (22 ) (281 ) Balance, end of period $ 637 $ 1,278 $ 1,915 $ — $ 810 $ 886 $ 1,696 Allowance for Loan Losses The allowance for loan losses is established as an amount that management considers adequate to absorb possible losses on existing loans within the portfolio. The allowance consists of general, specific and unallocated components. The general component is based upon all loans collectively evaluated for impairment. The specific component is based upon all loans individually evaluated for impairment. The unallocated component represents credit losses inherent in the loan portfolio that may not have been contemplated in the general risk factors or the specific allowance analysis. Loans are charged against the allowance when management believes the collection of principal and interest is unlikely. The Company performs regular credit reviews of the loan portfolio to determine the credit quality and adherence to underwriting standards. When loans are originated, they are assigned a risk rating that is reassessed periodically during the term of the loan through the credit review process. The Company’s internal risk rating methodology assigns risk ratings ranging from one to ten, where a higher rating represents higher risk. The ten-point Estimated credit losses reflect consideration of all significant factors that affect the collectability of the loan portfolio. The historical loss rate for each group of loans with similar risk characteristics is determined based on the Company’s own loss experience in that group. Historical loss experience and recent trends in losses provide a reasonable starting point for analysis; however, they do not by themselves form a sufficient basis to determine the appropriate level for the allowance for loan losses. Qualitative or environmental factors that are likely to cause estimated credit losses to differ from historical losses are also considered, including but not limited to: • Changes in international, regional and local economic and business conditions and developments that affect the collectability of the portfolio, including the condition of various market segments, • Changes in the nature and volume of the portfolio and in the terms of loans, • Changes in the volume and severity of past due loans, the volume of nonaccrual loans and the volume and severity of adversely classified or graded loans, • Changes in the quality of the institution’s loan review system, • Changes in the value of underlying collateral for collateral-dependent loans, • The existence and effect of any concentrations of credit, and changes in the level of such concentrations, • The effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the institution’s existing portfolio, • Changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, • Changes in the current and future U.S. political environment, including debt ceiling negotiations, government shutdown and healthcare reform that may affect national, regional and local economic conditions, taxation, or disruption of national or global financial markets. The adequacy of the allowance for loan losses and the reserve for unfunded commitments is determined using a consistent, systematic methodology and is monitored regularly based on management’s evaluation of numerous factors. For each portfolio segment, these factors include: • The quality of the current loan portfolio, • The trend in the migration of the loan portfolio’s risk ratings, • The velocity of migration of losses and potential losses, • Current economic conditions, • Loan concentrations, • Loan growth rates, • Past-due • Evaluation of specific loss estimates for all significant problem loans, • Recovery experience, and • Peer comparison loss rates. A summary of the activity in the allowance for loan losses by major loan classification follows: For the three months ended September 30, 2017 Commercial Real Estate Construction Consumer Unallocated Total Beginning balance $ 8,693 $ 11,699 $ 2,142 $ 41 $ 876 $ 23,451 Charge-offs (516 ) — — (7 ) — (523 ) Recoveries 30 54 1 — — 85 Provision (reclassification) 481 60 (134 ) 4 (61 ) 350 Ending balance $ 8,688 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,363 For the nine months ended September 30, 2017 Commercial Real Estate Construction Consumer Unallocated Total Beginning balance $ 8,614 $ 10,872 $ 1,781 $ 41 $ 1,146 $ 22,454 Charge-offs (2,844 ) (150 ) — (12 ) — (3,006 ) Recoveries 90 97 2 1 — 190 Provision (reclassification) 2,828 994 226 8 (331 ) 3,725 Ending balance $ 8,688 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,363 At September 30, 2017, the allowance for loan losses on dental loans was $5,373, compared to $4,713 at December 31, 2016. See Note 4 for additional information on the dental loan portfolio. The following table presents the allowance and recorded investment in loans by major loan classification at September 30, 2017 and December 31, 2016: Balances as of September 30, 2017 Commercial Real Estate Construction Consumer Unallocated Total Ending allowance: collectively evaluated for impairment $ 8,679 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,354 Ending allowance: individually evaluated for impairment 9 — — — — 9 Ending allowance: loans acquired with deteriorated credit quality — — — — — — Total ending allowance $ 8,688 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,363 Ending loan balance: collectively evaluated for impairment $ 626,451 $ 1,046,756 $ 181,882 $ 2,855 $ — $ 1,857,944 Ending loan balance: individually evaluated for impairment 2,105 7,516 — — — 9,621 Ending loan balance: loans acquired with deteriorated credit quality 4,858 12,270 — — — 17,128 Total ending loan balance $ 633,414 $ 1,066,542 $ 181,882 $ 2,855 $ — $ 1,884,693 Balances as of December 31, 2016 Commercial Real Estate Construction Consumer Unallocated Total Ending allowance: collectively evaluated for impairment $ 7,881 $ 10,869 $ 1,781 $ 41 $ 1,146 $ 21,718 Ending allowance: individually evaluated for impairment 733 3 — — — 736 Ending allowance: loans acquired with deteriorated credit quality — — — — — — Total ending allowance $ 8,614 $ 10,872 $ 1,781 $ 41 $ 1,146 $ 22,454 Ending loan balance: collectively evaluated for impairment $ 628,773 $ 1,027,354 $ 167,491 $ 2,922 $ — $ 1,826,540 Ending loan balance: individually evaluated for impairment 4,396 7,852 320 — — 12,568 Ending loan balance: loans acquired with deteriorated credit quality 6,547 14,132 — — — 20,679 Total ending loan balance $ 639,716 $ 1,049,338 $ 167,811 $ 2,922 $ — $ 1,859,787 The September 30, 2017, ending allowance includes $9 in specific allowance for $9,621 of impaired loans ($7,260 net of government guarantees). At December 31, 2016, the Company had $12,568 of impaired loans ($10,567 net of government guarantees) with a specific allowance of $736. Management believes that the allowance for loan losses was adequate as of September 30, 2017. However, future loan losses may exceed the levels provided for in the allowance for loan losses and could possibly result in additional charges to the provision for loan losses. Credit Quality Indicators The Company uses the following loan grades, which are also often used by regulators when assessing the credit quality of a loan portfolio. Pass 1-6. Special Mention Substandard Doubtful Management strives to consistently apply these definitions when allocating its loans by loan grade. The loan portfolio is continuously monitored for changes in credit quality and management takes appropriate action to update the loan risk ratings accordingly. Management has not changed the Company’s policy towards its use of credit quality indicators during the periods reported. The following tables present the Company’s loan portfolio information by loan type and credit grade at September 30, 2017 and December 31, 2016: Credit Quality Indicators As of September 30, 2017 Loan Grade Pass Special Mention Substandard Doubtful Totals Real estate loans Multi-family residential $ 85,732 $ — $ — $ — $ 85,732 Residential 1-4 60,094 — 1,285 — 61,379 Owner-occupied commercial 446,902 — 18,634 — 465,536 Nonowner-occupied commercial 449,306 — 4,589 — 453,895 Total real estate loans 1,042,034 — 24,508 — 1,066,542 Construction Multi-family residential 19,711 — — — 19,711 Residential 1-4 48,274 — — — 48,274 Commercial real estate 96,426 — — — 96,426 Commercial bare land and acquisition & development 8,635 — — — 8,635 Residential bare land and acquisition & development 8,286 — 550 — 8,836 Total construction loans 181,332 — 550 — 181,882 Commercial and other 618,016 — 15,398 — 633,414 Consumer 2,855 — — — 2,855 Totals $ 1,844,237 $ — $ 40,456 $ — $ 1,884,693 Percentage of portfolio 97.85 % 0.00 % 2.15 % 0.00 % 100.00 % Credit Quality Indicators As of December 31, 2016 Loan Grade Pass Special Mention Substandard Doubtful Totals Real estate loans Multi-family residential $ 74,340 $ — $ — $ — $ 74,340 Residential 1-4 58,286 — 3,262 — 61,548 Owner-occupied commercial 443,737 — 17,820 — 461,557 Nonowner-occupied commercial 445,283 — 6,610 — 451,893 Total real estate loans 1,021,646 — 27,692 — 1,049,338 Construction Multi-family residential 22,252 — — — 22,252 Residential 1-4 43,532 — — — 43,532 Commercial real estate 76,301 — — — 76,301 Commercial bare land and acquisition & development 15,081 — — — 15,081 Residential bare land and acquisition & development 9,852 — 793 — 10,645 Total construction loans 167,018 — 793 — 167,811 Commercial and other 621,165 — 16,890 1,661 639,716 Consumer 2,922 — — — 2,922 Totals $ 1,812,751 $ — $ 45,375 $ 1,661 $ 1,859,787 Percentage of portfolio 97.47 % 0.00 % 2.44 % 0.09 % 100.00 % At September 30, 2017 and December 31, 2016, the Company had $941 and $1,026, respectively, in unfunded commitments on its classified loans, which amounts are included in the calculation of our classified asset ratio. Past Due and Nonaccrual Loans The Company uses the terms “past due” and “delinquent” interchangeably. Amortizing loans are considered past due or delinquent based upon the number of contractually required payments not made. Delinquency status for all contractually matured loans, commercial and commercial real estate loans with non-monthly The following tables present an aging analysis of past due and nonaccrual loans at September 30, 2017 and December 31, 2016: Age Analysis of Loans Receivable As of September 30, 2017 30-59 Days 60-89 Days Greater Nonaccrual Total Past Total Total Loans Real estate loans Multi-family residential $ — $ — $ — $ — $ — $ 85,732 $ 85,732 Residential 1-4 — — — 185 185 60,478 60,663 Owner-occupied commercial 837 — — 519 1,356 455,671 457,027 Nonowner-occupied commercial — — 1,428 531 1,959 448,893 450,852 Total real estate loans 837 — 1,428 1,235 3,500 1,050,774 1,054,274 Construction Multi-family residential — — — — — 19,711 19,711 Residential 1-4 — — — — — 48,274 48,274 Commercial real estate — — — — — 96,426 96,426 Commercial bare land and acquisition & development 199 — — — 199 8,437 8,636 Residential bare land and acquisition & development — — — — — 8,835 8,835 Total construction loans 199 — — — 199 181,683 181,882 Commercial and other 696 — — 1,479 2,175 626,379 628,554 Consumer 9 2 — — 11 2,844 2,855 Total $ 1,741 $ 2 $ 1,428 $ 2,714 $ 5,885 $ 1,861,680 $ 1,867,565 Age Analysis of Loans Receivable As of December 31, 2016 30-59 60-89 Accruing Greater Still Accruing Nonaccrual Total Past Total Total Loans Real estate loans Multi-family residential $ — $ — $ — $ — $ — $ 74,340 $ 74,340 Residential 1-4 — — — 158 158 59,241 59,399 Owner-occupied commercial — — — — — 452,748 452,748 Nonowner-occupied commercial — — — 601 601 448,118 448,719 Total real estate loans — — — 759 759 1,034,447 1,035,206 Construction Multi-family residential — — — — — 22,252 22,252 Residential 1-4 — — — — — 43,532 43,532 Commercial real estate — — — — — 76,301 76,301 Commercial bare land and acquisition & development — — — — — 15,081 15,081 Residential bare land and acquisition & development — — — — — 10,645 10,645 Total construction loans — — — — — 167,811 167,811 Commercial and other 363 366 — 2,794 3,523 629,646 633,169 Consumer — — — — — 2,922 2,922 Total $ 363 $ 366 $ — $ 3,553 $ 4,282 $ 1,834,826 $ 1,839,108 Impaired Loans Regular credit reviews of the portfolio are performed to identify loans that are considered potentially impaired. Potentially impaired loans are referred to the Asset-Liability Committee (ALCO) for review and are included in the specific calculation of allowance for loan losses. A loan is considered impaired when, based on current information and events, the Company is unlikely to collect all principal and interest due according to the terms of the loan agreement. When the amount of the impairment represents a confirmed loss, it is charged off against the allowance for loan losses. Impaired loans are often reported net of government guarantees to the extent that the guarantees are expected to be collected. Impaired loans generally include all loans classified as nonaccrual and troubled debt restructurings. Accrual of interest is discontinued on impaired loans when management believes that, after considering economic and business conditions and collection efforts, the borrower’s financial condition is such that collection of principal or interest is doubtful. Accrued, but uncollected, interest is generally reversed when loans are placed on nonaccrual status. Interest income is subsequently recognized only to the extent cash payments are received satisfying all delinquent principal and interest amounts, and the prospects for future payments in accordance with the loan agreement appear relatively certain. In accordance with GAAP, payments received on nonaccrual loans are applied to the principal balance and no interest income is recognized. Interest income may be recognized on impaired loans that are not on nonaccrual status. The following tables display an analysis of the Company’s impaired loans at September 30, 2017, and December 31, 2016: Impaired Loan Analysis As of September 30, 2017 Recorded Recorded Total Unpaid Average Related Real estate Multi-family residential $ — $ — $ — $ — $ — $ — Residential 1-4 100 — 100 100 101 — Owner-occupied commercial 5,456 — 5,456 5,456 5,467 — Nonowner-occupied commercial 1,960 — 1,960 1,959 1,999 — Total real estate loans 7,516 — 7,516 7,515 7,567 — Construction Multi-family residential — — — — — — Residential 1-4 — — — — — — Commercial real estate — — — — — — Commercial bare land and acquisition & development — — — — — — Residential bare land and acquisition & development — — — — — — Total construction loans — — — — — — Commercial and other 1,627 478 2,105 3,986 2,596 9 Consumer — — — — — — Total impaired loans $ 9,143 $ 478 $ 9,621 $ 11,501 $ 10,163 $ 9 Impaired Loan Analysis As of December 31, 2016 Recorded Recorded Total Unpaid Average Related Real estate Multi-family residential $ — $ — $ — $ — $ — $ — Residential 1-4 454 300 754 775 644 1 Owner-occupied commercial 4,106 865 4,971 4,971 1,804 2 Nonowner-occupied commercial 2,127 — 2,127 2,189 2,228 — Total real estate loans 6,687 1,165 7,852 7,935 4,676 3 Construction Multi-family residential — — — — — — Residential 1-4 — — — — 37 — Commercial real estate — — — — — — Commercial bare land and acquisition & development — — — — — — Residential bare land and acquisition & development 320 — 320 320 1,556 — Total construction loans 320 — 320 320 1,593 — Commercial and other 2,255 2,141 4,396 4,767 3,518 733 Consumer — — — — — — Total impaired loans $ 9,262 $ 3,306 $ 12,568 $ 13,022 $ 9,787 $ 736 The impaired balances reported above are not adjusted for government guarantees of $2,361 and $2,001 at September 30, 2017 and December 31, 2016, respectively. The recorded investment in impaired loans, net of government guarantees, totaled $7,260 and $10,567 at September 30, 2017, and December 31, 2016, respectively. Troubled Debt Restructurings In the normal course of business, the Company may modify the terms of certain loans, attempting to protect as much of its investment as possible. Management evaluates the circumstances surrounding each modification to determine whether it is a troubled debt restructuring (“TDR”). TDRs exist when 1) the restructuring constitutes a concession, and 2) the debtor is experiencing financial difficulties. The following table displays the Company’s TDRs by class at September 30, 2017 and December 31, 2016: Troubled Debt Restructurings as of September 30, 2017 December 31, 2016 Number of Post-Modification Number of Post-Modification Real estate Multifamily residential — $ — — $ — Residential 1-4 1 100 4 754 Owner-occupied commercial 4 5,215 4 5,447 Non owner-occupied commercial 5 1,959 6 2,127 Total real estate loans 10 7,274 14 8,328 Construction Multifamily residential — — — — Residential 1-4 — — — — Commercial real estate — — — — Commercial bare land and acquisition & development — — — — Residential bare land and acquisition & development — — — — Total construction loans — — — — Commercial and other 15 2,142 16 2,901 Consumer — — — — Total 25 $ 9,416 30 $ 11,229 The recorded investment in TDRs on nonaccrual status totaled $1,630 and $2,250 at September 30, 2017 and December 31, 2016, respectively. The Company’s policy is that loans placed on nonaccrual will typically remain on nonaccrual status until all principal and interest payments are brought current and the prospect for future payment in accordance with the loan agreement appears relatively certain. The Company’s policy generally refers to a minimum of six months of payment performance as sufficient to warrant a return to accrual status. For the nine months ended September 30, 2017, the Company restructured one loan into a TDR for which impairment was previously measured under the Company’s general loan loss allowance methodology. The types of modifications offered can generally be described in the following categories: • Rate Modification - • Term Modification - • Interest-only Modification - • Combination Modification - Below is a table of the newly restructured loans identified in the nine months ended September 30, 2017. Troubled Debt Restructurings Identified During the nine months ended September 30, 2017 Rate Term Interest-only Combination Real estate Multi-family residential $ — $ — $ — $ — Residential 1-4 — — — 50 Owner-occupied commercial — — — — Nonowner-occupied commercial — — — — Total real estate loans — — — 50 Construction Multi-family residential — — — — Residential 1-4 — — — — Commercial real estate — — — — Commercial bare land and acquisition & development — — — — Residential bare land and acquisition & development — — — — Total construction loans — — — — Commercial and other — — — — Consumer — — — — Total $ — $ — $ — $ 50 There were no TDRs identified in the three months ended September 30, 2017. Subsequent to a loan being classified as a TDR, a borrower may become unwilling or unable to abide by the terms of the modified agreement. In such cases of default, the Company takes appropriate action to recover principal and interest payments including the use of foreclosure proceedings. The following table represents loans receivable modified as TDRs that subsequently defaulted within the first twelve months of restructure during the period. Troubled Debt Restructurings that Subsequently 2017 2016 Number of Recorded Number of Recorded Real estate Multi-family residential — $ — — $ — Residential 1-4 — — — — Owner-occupied commercial — — 1 444 Nonowner-occupied commercial — — — — Total real estate loans — — 1 444 Construction Multi-family residential — — — — Residential 1-4 — — — — Commercial real estate — — — — Commercial bare land and acquisition & development — — — — Residential bare land and acquisition & development — — — — Total construction loans — — — — Commercial and other — — — — Consumer — — — — Total — $ — 1 $ 444 At September 30, 2017 and December 31, 2016, the Company had no commitments to lend additional funds on loans restructured as TDRs.

Dental Loan Portfolio

Dental Loan Portfolio	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Dental Loan Portfolio	NOTE 4 – DENTAL LOAN PORTFOLIO Dental lending is not operated as a business segment, and dental loans are made in the normal course of commercial lending activities throughout the Company. However, to assist in understanding the concentrations and risks associated with the Company’s loan portfolio, the following Note has been included to provide additional information relating to the Company’s dental loan portfolio. At September 30, 2017 and December 31, 2016, loans to dental professionals totaled $390,333 and $377,478, respectively, and represented 20.71% and 20.30% in principal amount of total outstanding loans, respectively. As of September 30, 2017 and December 31, 2016, dental loans were supported by government guarantees totaling $4,658 and $5,641, respectively. These guarantees represented 1.19% and 1.49% in principal amount of the outstanding dental loan balances as of such respective dates. The Company defines a “dental loan” as a loan to dental professionals for the purpose of practice expansion, acquisition or other purpose supported by the cash flows of a dental practice. Loan Classification Major classifications of dental loans at September 30, 2017 and December 31, 2016, were as follows: September 30, December 31, Real estate secured loans: Owner-occupied commercial $ 62,376 $ 63,793 Other dental real estate loans 358 806 Total permanent real estate loans 62,734 64,599 Dental construction loans 10,130 4,109 Total real estate loans 72,864 68,708 Commercial loans 317,469 308,770 Gross loans $ 390,333 $ 377,478 Market Area The Bank’s principal “market area” is within the States of Oregon and Washington west of the Cascade Mountain Range. This area is serviced by branch locations in Eugene, Portland and the Puget Sound. The Company also makes national dental loans throughout the United States, and currently has dental loans in 45 states. National loan relationships are maintained and serviced by Bank personnel primarily located in Portland. The following table summarizes the Company’s dental lending by borrower location: September 30, December 31, Local $ 154,061 $ 150,268 National 236,272 227,210 Total $ 390,333 $ 377,478 Allowance The allowance for loan losses identified for the dental loan portfolio is established as an amount that management considers adequate to absorb possible losses on existing loans within the dental portfolio. The allowance related to the dental loan portfolio consists of general and specific components. The general component is based upon all dental loans collectively evaluated for impairment, including qualitative conditions associated with: loan type, out-of-market start-up Three months ended Nine months ended September 30, September 30, 2017 2016 2017 2016 Balance, beginning of period $ 5,257 $ 4,151 $ 4,713 $ 4,022 Provision 120 601 2,924 704 Charge-offs (50 ) (9 ) (2,325 ) (9 ) Recoveries 46 55 61 81 Balance, end of period $ 5,373 $ 4,798 $ 5,373 $ 4,798 Credit Quality Please refer to Note 3 for additional information on the definitions of the credit quality indicators. The following tables present the Company’s dental loan portfolio by market and credit grade at September 30, 2017 and December 31, 2016: As of September 30, 2017 Loan Grade Pass Special Mention Substandard Doubtful Totals Local $ 151,696 $ — $ 2,365 $ — $ 154,061 National 235,090 — 1,182 — 236,272 Total $ 386,786 $ — $ 3,547 $ — $ 390,333 As of December 31, 2016 Loan Grade Pass Special Mention Substandard Doubtful Totals Local $ 148,805 $ — $ 1,463 $ — $ 150,268 National 224,493 — 1,056 1,661 227,210 Total $ 373,298 $ — $ 2,519 $ 1,661 $ 377,478 Past Due and Nonaccrual Loans Please refer to Note 3 for additional information on the definitions of “past due.” The following tables present an aged analysis of the dental loan portfolio by market, including nonaccrual loans, as of September 30, 2017 and December 31, 2016: As of September 30, 2017 30-59 Days 60-89 Days Greater Still Accruing Nonaccrual Total Past Total Total Loans Local $ 74 $ — $ — $ 358 $ 432 $ 153,629 $ 154,061 National — — — 767 767 235,505 236,272 Total $ 74 $ — $ — $ 1,125 $ 1,199 $ 389,134 $ 390,333 As of December 31, 2016 30-59 Days Still Accruing 60-89 Days Greater Than 90 Days Past Due Still Accruing Nonaccrual Total Past Total Total Loans Local $ — $ — $ — $ 407 $ 407 $ 149,861 $ 150,268 National 263 366 — 1,660 2,289 224,921 227,210 Total $ 263 $ 366 $ — $ 2,067 $ 2,696 $ 374,782 $ 377,478

Securities Sold Under Agreement

Securities Sold Under Agreement to Repurchase	9 Months Ended
	Sep. 30, 2017
Brokers and Dealers [Abstract]
Securities Sold Under Agreement to Repurchase	NOTE 5 – SECURITIES SOLD UNDER AGREEMENT TO REPURCHASE The Company sells certain securities under agreements to repurchase with its customers. The agreements transacted with its customers are utilized as an overnight investment product. The amounts received under these agreements represent short-term borrowings and are reflected as a liability in the consolidated balance sheets. The securities underlying these agreements are included in investment securities in the consolidated balance sheets. The Company has no control over the market value of the securities, which fluctuates due to market conditions. However, the Company is obligated to promptly transfer additional securities if the market value of the securities falls below the repurchase agreement price. The Company manages this risk by maintaining an unpledged securities portfolio that it believes is sufficient to cover a decline in the market value of the securities sold under agreements to repurchase. All securities sold under agreements to repurchase had a daily maturity date. See Note 2 in the Notes to Consolidated Financial Statements 10-Q The following table presents information regarding securities sold under agreements to repurchase at September 30, 2017 and December 31, 2016: September 30, December 31, Balance at end of period $ 2,031 $ 1,966 Average balance outstanding for the period 2,134 702 Maximum amount outstanding at any month end during the period 3,100 2,017 Weighted average interest rate for the period 0.08 % 0.06 % Weighted average interest rate at period end 0.07 % 0.08 %

Federal Funds and Overnight Fun

Federal Funds and Overnight Funds Purchased	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Federal Funds and Overnight Funds Purchased	NOTE 6 – FEDERAL FUNDS AND OVERNIGHT FUNDS PURCHASED The Company had unsecured federal funds borrowing lines with various correspondent banks totaling $154,000 at September 30, 2017 and $154,000 at December 31, 2016. The terms of the lines are subject to change with interest payable at the then stated rate. At September 30, 2017 and December 31, 2016, there were no borrowings outstanding on these lines. The Company also had a secured overnight borrowing line available from the Federal Reserve Bank that totaled $87,965 and $80,784 at September 30, 2017 and December 31, 2016, respectively. The Federal Reserve Bank borrowing line is secured through the pledging of $142,321 and $143,679 at September 30, 2017 and December 31, 2016, respectively, of commercial loans under the Company’s Borrower-In-Custody program. At September 30, 2017 and December 31, 2016, there were no outstanding borrowings on this line. The terms of the lines are subject to change with interest payable at the then stated rate.

Federal Home Loan Bank Borrowin

Federal Home Loan Bank Borrowings	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Federal Home Loan Bank Borrowings	NOTE 7 – FEDERAL HOME LOAN BANK BORROWINGS The Company has a borrowing limit with the Federal Home Loan Bank of Des Moines (“FHLB”) equal to 35% of total assets, subject to the value of discounted collateral pledged and stock holdings. At September 30, 2017, the maximum borrowing line was $891,318; however, the FHLB borrowing line was limited by the discounted value of collateral pledged. At September 30, 2017, the Company had pledged $896,580 in real estate loans to the FHLB that had a discounted collateral value of $632,226. There was $101,000 borrowed on this line at September 30, 2017. At December 31, 2016, the maximum borrowing line was $889,503; however, the FHLB borrowing line was limited by the discounted value of collateral pledged. At December 31, 2016, the Company had pledged $867,596 in real estate loans to the FHLB that had a discounted collateral value of $632,202. There was $65,000 borrowed on this line at December 31, 2016. Below is a summary of outstanding FHLB borrowings by maturity. Current September 30, Cash management advance NA $ 96,000 2017 0 — 2018 1.55 3,000 2019 0 — 2020 0 — 2021 0 — Thereafter 3.85 2,000 $ 101,000

Borrowed Funds

Borrowed Funds	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Borrowed Funds	NOTE 8 – BORROWED FUNDS Subordinated Debentures In June 2016, the Company issued $35,000 in aggregate principal amount of fixed-to-floating The Notes are included in Tier 2 capital (with certain limitations applicable) under current regulatory guidelines and interpretations. Junior Subordinated Debentures In November 2005, the Company completed the private placement of $8,000 in aggregate liquidation amount of trust preferred securities (the “TPS”), through its subsidiary, Pacific Continental Capital Trust I. The interest rate on the TPS was 6.265% until January 2011, after which it was converted to a floating rate of three-month LIBOR plus 135 basis points. The TPS mature in 2035, but are callable by the Company at par any time after January 7, 2011. The Company issued $8,248 of junior subordinated debentures (the “Debentures”) to the trust in exchange for ownership of all of the common security of the trust and the proceeds of the preferred securities sold by the trust. In accordance with current accounting guidance, the trust is not consolidated in the Company’s financial statements, but rather the Debentures are shown as a liability. The interest rate on the Debentures was 6.265% until January 2011, after which it was converted to a floating rate of three-month LIBOR plus 135 basis points. The Debentures have the same prepayment provisions as the TPS. On September 6, 2016, the Company completed the acquisition of Foundation Bancorp, Inc. At that time, the Company assumed ownership of Foundation Statutory Trust I, which had previously issued $6,000 in aggregate liquidation amount of trust preferred securities. The interest rate on these trust preferred securities is a floating rate of three-month LIBOR plus 173 basis points. The Company also acquired $6,148 of junior subordinated debentures (the “Foundation Debentures”) issued to the trust in exchange for ownership of all of the common securities of the trust and the proceeds of the preferred securities sold by the trust. In accordance with current accounting guidance, the trust is not consolidated in the Company’s financial statements, but rather the Foundation Debentures are shown as a liability, and acquired at an acquisition date fair value of $3,013. The Debentures and the Foundation Debentures are included in the Company’s Tier I capital (with certain limitations applicable) under current regulatory guidelines and interpretations.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	NOTE 9 – SHARE-BASED COMPENSATION The Company’s 2006 Stock Option and Equity Compensation Plan (the “2006 SOEC Plan”) authorizes the award of up to 1,550,000 shares in stock-based awards. The awards granted under this plan are service-based and are subject to vesting. The Compensation Committee of the Board of Directors may impose any terms or conditions on the vesting of an award that it determines to be appropriate. Awards granted generally vest over four years and have a maximum life of ten years. Awards may be granted at exercise prices of not less than 100.00% of the fair market value of the Company’s common stock at the grant date. Pursuant to the 2006 SOEC Plan, incentive stock options (“ISOs”), nonqualified stock options, restricted stock, restricted stock units (“RSUs”), or stock appreciation rights (“SARs”) may be awarded to attract and retain the best available personnel to the Corporation and its subsidiary. SARs may be settled in common stock or cash as determined at the date of issuance. Liability-based awards (including all cash-settled SARs) have no impact on the number of shares available to be issued within the plan. Additionally, non-qualified The following table identifies the compensation expense recorded and tax benefits received by the Company on its share-based compensation plans for the three and nine months ended September 30, 2017 and 2016: Three months ended September 30, 2017 2016 Compensation Tax Benefit Compensation Tax Benefit Equity-based awards: Employee RSUs $ 315 $ 120 $ 397 $ 151 Liability-based awards: Employee cash SARs — — — — $ 315 $ 120 $ 397 $ 151 Nine months ended September 30, 2017 2016 Compensation Tax Benefit Compensation Tax Benefit Equity-based awards: Director restricted stock $ — $ — $ 240 $ 91 Employee RSUs 1,042 396 1,187 451 Liability-based awards: Employee cash SARs 150 — — — $ 1,192 $ 396 $ 1,427 $ 542 The following table identifies stock options, employee stock settled SARs, and employee cash settled SARs exercised during the three and nine months ended September 30, 2017 and 2016: Three months ended September 30, 2017 Number Weighted Intrinsic Number Net Cash Stock options — — — — NA Employee stock SARs 77 $ 11.30 — 24 NA Employee cash SARs — — NA NA — 77 — 24 — Nine months ended September 30, 2017 Number Weighted Intrinsic Number Net Cash Stock options 137,307 $ 14.90 $ 1,396 79,601 NA Employee stock SARs 46,798 $ 15.84 116 10,614 NA Employee cash SARs 28,150 $ 16.47 NA NA $ 169 212,255 $ 1,512 90,215 $ 169 Three months ended September 30, 2016 Number Weighted Intrinsic Number Net Cash Stock options 30,074 $ 16.54 $ 9 9,832 NA Employee stock SARs 41,237 $ 15.83 5 1,768 NA Employee cash SARs 27,521 $ 15.95 NA NA $ 45 98,832 $ 14 11,600 $ 45 Nine months ended September 30, 2016 Number Weighted Intrinsic Number Net Cash Stock options 65,034 $ 13.86 $ 117 44,792 NA Employee stock SARs 79,806 $ 14.54 26 6,634 NA Employee cash SARs 47,644 $ 15.11 NA NA $ 73 192,484 143 51,426 73 At September 30, 2017, the Company had estimated unrecognized compensation expense of approximately $2,019 for unvested RSUs. This amount is based on a historical forfeiture rate of 13.00% for all RSUs granted to employees. The weighted-average period of time the unrecognized compensation expense will be recognized for the unvested RSUs was approximately 2.26 years as of September 30, 2017.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	NOTE 10 – DERIVATIVE INSTRUMENTS The Bank maintains two interest rate swaps with commercial banking customers tied to loans on the consolidated balance sheet. Those interest rate swaps are simultaneously hedged by offsetting the interest rate swaps that the Bank executes with a third party, such that the Bank minimizes its net rate risk exposure. As of September 30, 2017 and December 31, 2016, the Bank had non-hedge Previously, the Bank entered into a swap with a third party to serve as a hedge to a fixed rate loan. This swap was designated a hedging instrument, hedging a 10-year one-time The following tables present quantitative information pertaining to the commercial loan related interest rate swaps as of September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 Not-Hedge- Hedge- Not-Hedge- Notional amount $ 8,357 $ 1,492 $ 8,540 Weighted average pay rate 4.58 % 5.71 % 4.85 % Weighted average receive rate 4.32 % 3.54 % 3.63 % Weighted average maturity in years 4.70 6.65 5.45 The following table presents the fair values of derivative instruments and their locations in the consolidated balance sheets as of September 30, 2017 and December 31, 2016: Asset Derivatives Liability Derivatives Derivative Balance sheet location September 30, December 31, September 30, December 31, Cash flow hedge - trust preferred Other assets or other payables $ — $ 91 $ — $ — Interest rate swap designated as hedging instrument Other assets or other payables — 45 — 67 Interest rate swap not designated as hedging instrument Other assets or other payables 17 14 17 14 $ 17 $ 150 $ 17 $ 81 The following table presents the income statement impact of the derivative instruments for the three and nine months ended September 30, 2017 and 2016: Derivative Income statement location Three months ended Nine months ended 2017 2016 2017 2016 Interest rate swap designated as hedging instrument Other noninterest income $ — $ (2 ) $ 4 $ (6 ) $ — $ (2 ) $ 4 $ (6 )

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value	NOTE 11 – FAIR VALUE The following disclosures about fair value of financial instruments are made in accordance with provisions of ASC 825 “Financial Instruments.” The use of different assumptions and estimation methods could have a significant effect on fair value amounts. Accordingly, the estimates of fair value herein are not necessarily indicative of the amounts that might be realized in a current market exchange. The following table presents the estimated fair values of the financial instruments at September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 Carrying Fair Value Carrying Fair Value Financial assets: Cash and cash equivalents $ 70,278 $ 70,278 $ 67,113 $ 67,113 Securities available-for-sale 453,660 453,660 470,996 470,996 Loans, net of deferred fees 1,882,842 1,855,447 1,857,767 1,837,673 Accrued interest receivable 6,502 6,502 7,017 7,017 Federal Home Loan Bank stock 7,084 7,084 5,423 5,423 Bank-owned life insurance 35,840 35,840 35,165 35,165 Interest rate swaps 17 17 150 150 Financial liabilities: Deposits $ 2,098,157 2,097,073 $ 2,148,103 $ 2,147,056 Federal Home Loan Bank borrowings 101,000 101,005 65,000 65,043 Subordinated debenture 34,167 34,167 34,096 32,140 Junior subordinated debentures 11,428 7,610 11,311 6,972 Accrued interest payable 672 672 176 176 Interest rate swaps 17 17 81 81 Cash and cash equivalents Securities available-for-sale Loans Federal Home Loan Bank stock Interest receivable and payable Bank-owned life insurance Interest rate swaps – . Deposits Federal Home Loan Bank borrowings Subordinated debentures Junior subordinated debentures Off-balance The Company also adheres to the FASB guidance with regards to ASC 820, “Fair Value Measures.” This guidance defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurements. The statement requires fair value measurement disclosure of all assets and liabilities that are carried at fair value on either a recurring or nonrecurring basis. The Company determines fair value based upon quoted prices when available or through the use of alternative approaches, such as matrix or model pricing, when market quotes are not readily accessible or available. The valuation techniques used are based on observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in active markets. • Level 2 – Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active or model-derived valuations whose inputs are observable or whose significant value drivers are observable. • Level 3 – Unobservable inputs are used to measure fair value to the extent that observable inputs are not available. The Company’s own data used to develop unobservable inputs is adjusted for market consideration when reasonably available. The following table presents information about the level in the fair value hierarchy for the Company’s assets and liabilities not measured and carried at fair value as of September 30, 2017 and December 31, 2016: Carrying Amount Fair Value at September 30, 2017 Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 70,278 $ 70,278 $ — $ — Loans, net of deferred fees 1,882,842 — — 1,855,447 Accrued interest receivable 6,502 6,502 — — Federal Home Loan Bank stock 7,084 7,084 — — Financial liabilities: Deposits $ 2,098,157 $ 1,961,663 $ 135,410 $ — Federal Home Loan Bank borrowings 101,000 — 101,005 — Subordinated debentures 34,167 — 34,167 — Junior subordinated debentures 11,428 — 7,610 — Accrued interest payable 672 672 — — Carrying Amount Fair Value at December 31, 2016 Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 67,113 $ 67,113 $ — $ — Loans 1,857,767 — — 1,837,673 Accrued interest receivable 7,017 7,017 — — Federal Home Loan Bank stock 5,423 5,423 — — Bank-owned life insurance 35,165 35,165 — — Financial liabilities: Deposits $ 2,148,103 $ 1,969,220 $ 177,836 $ — Federal Home Loan Bank borrowings 65,000 — 65,043 — Subordinated debentures 34,096 — 32,140 — Junior subordinated debentures 11,311 — 6,972 — Accrued interest payable 176 176 — — The tables below show assets and liabilities measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016: Carrying Fair Value at September 30, 2017 Value Level 1 Level 2 Level 3 Financial Assets Available-for-sale Obligations of U.S. government agencies $ 25,670 $ — $ 25,670 $ — Obligations of states and political subdivisions 110,474 — 110,474 — Agency mortgage-backed securities 278,865 — 278,865 — Private-label mortgage-backed securities 1,518 — 315 1,203 SBA variable rate pools 37,133 — 37,133 — Interest rate swaps 17 17 — — Total assets measured on a recurring basis $ 453,677 $ 17 $ 452,457 $ 1,203 Financial Liabilities Interest rate swap liabilities measured on a recurring basis $ 17 $ 17 $ — $ — Carrying Fair Value at December 31, 2016 Value Level 1 Level 2 Level 3 Available-for-sale Obligations of U.S. government agencies $ 25,620 $ — $ 25,620 $ — Obligations of states and political subdivisions 110,739 — 110,739 — Agency mortgage-backed securities 290,036 — 290,036 — Private-label mortgage-backed securities 1,937 — 569 1,368 SBA variable rate pools 42,664 — 42,664 — Interest rate swaps 150 150 — — Total assets measured on a recurring basis $ 471,146 $ 150 $ 469,628 $ 1,368 Financial Liabilities Interest rate swap liabilities measured on a recurring basis $ 81 $ 81 $ — $ — No transfers to or from Levels 1 and 2 occurred on assets and liabilities measured at fair value on a recurring basis during the three or nine months ended September 30, 2017 or during the year ended December 31, 2016. The following is a description of the inputs and valuation methodologies used for assets and liabilities recorded at fair value on a recurring basis. Fair value for all classes of available-for-sale The following table provides a reconciliation of private-label mortgage-backed securities measured at fair value on a recurring basis using unobservable inputs (Level 3) for the three and nine months ended September 30, 2017 and 2016: Three months ended Nine months ended September 30, September 30, 2017 2016 2017 2016 Beginning balance $ 1,267 $ 1,399 $ 1,368 $ 1,586 Transfers into level 3 — 70 — 70 Transfers out of Level 3 — — — — Total gains or losses Included in earnings (7 ) (2 ) (9 ) (19 ) Included in other comprehensive income 13 64 70 45 Paydowns (70 ) (77 ) (226 ) (228 ) Purchases, issuances, sales and settlements Purchases — — — — Issuances — — — — Sales — — — — Settlements — — — — Ending balance $ 1,203 $ 1,454 $ 1,203 $ 1,454 Fair value for all classes of available-for-sale The Company utilizes FTN Financial as an independent third-party asset pricing service to estimate fair value on all of its available-for-sale two-sided • Obligations of U.S. government agencies • Obligations of states and political subdivisions • Private-label mortgage-backed securities • Mortgage-backed securities • SBA variable pools Inputs may be prioritized differently on any given day for any security and not all inputs listed are available for use in the evaluation process on any given day for each security evaluation. The valuation methodology used by asset type includes: • Obligations of U.S. government agencies • Obligations of states and political subdivisions • Private-label mortgage-backed securities • Mortgage-backed securities • SBA pools The third-party pricing service follows multiple review processes to assess the available market, credit and deal-level information to support its valuation estimates. If sufficient objectively verifiable information is not available to support a security’s valuation, an alternate independent evaluation source will be used. The Company’s securities portfolio was valued through its independent third-party pricing service using evaluated pricing models and quoted prices based on market data. For further assurance, the Company’s estimate of fair value was compared to an additional independent third-party estimate at June 30, 2016, and the Company obtained key inputs for a sample of securities across sectors and evaluated those inputs for reasonableness. This analysis was performed at the individual security level and no material variances were noted. Due to the pending merger with Columbia and the anticipated timing of the closing, the independent analysis that would have normally been conducted as of June 30, 2017 was not completed. There have been no significant changes in the valuation techniques during the periods reported. The tables below show assets measured at fair value on a nonrecurring basis as of September 30, 2017 and December 31, 2016: Carrying Fair Value September 30, 2017 Value Level 1 Level 2 Level 3 Loans measured for impairment (net of government guarantees and specific reserve) $ 458 $ — $ — $ 458 Carrying Fair Value December 31, 2016 Value Level 1 Level 2 Level 3 Other real estate owned $ 10,936 $ — $ — $ 10,936 The following is a description of the inputs and valuation methodologies used for assets recorded at fair value on a nonrecurring basis. Loans measured for impairment (net of government guarantees and specific reserves) include the estimated fair value of collateral-dependent loans, less collectible government guarantees, as well as certain noncollateral-dependent loans measured for impairment with an allocated specific reserve. When a collateral-dependent loan is identified as impaired, the value of the loan is measured using the current fair value of the collateral less selling costs. The fair value of collateral is generally estimated by obtaining external appraisals which are usually updated every 6 to 12 months based on the nature of the impaired loans. Certain noncollateral-dependent loans measured for impairment with an allocated specific reserve are valued based upon the estimated net realizable value of the loan. If the estimated fair value of the impaired loan, less collectible government guarantees, is less than the recorded investment in the loan, impairment is recognized as a charge-off Other real estate owned represents real estate which the Company has taken control of in partial or full satisfaction of loans. At the time of foreclosure, other real estate owned is recorded at the lower of the carrying amount of the loan or fair value less costs to sell, which becomes the property’s new basis. Any write downs based on the asset’s fair value at the date of acquisition are charged to the allowance for loan losses. After foreclosure, management periodically orders appraisals or performs valuations to ensure that the real estate is carried at the lower of its new cost basis or fair value, net of estimated costs to sell. Appraisals are generally updated every 6 to 12 months on other real estate owned. Fair value adjustments on other real estate owned are recognized within net loss on real estate owned. The loss represents impairments on other real estate owned for fair value adjustments based on the fair value of the real estate. There have been no significant changes in the valuation techniques during the periods reported.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Regulatory Matters	NOTE 12 – REGULATORY MATTERS The Company and the Bank are subject to the regulations of certain federal and state agencies and receive periodic examinations by those regulatory authorities. In addition, they are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory – and possibly additional discretionary – actions by regulators that, if undertaken, could have a direct material effect on the consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of the Bank’s assets, liabilities, and certain off-balance Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios of Total capital, Tier 1 capital, common equity Tier 1 to risk-weighted assets and Tier 1 capital to leverage assets. Management believes that, as of September 30, 2017, the Company and the Bank met all capital adequacy requirements to which they were subject. As of September 30, 2017, and according to Federal Reserve and FDIC guidelines, the Bank was considered to be well-capitalized. To be categorized as well-capitalized, the Bank must maintain minimum Total capital, Tier 1 capital, common equity Tier 1 to risk-weighted assets and Tier 1 capital to leverage assets ratios as set forth in the following table. Actual For Capital To Be Well Amount Ratio Amount Ratio Amount Ratio As of September 30, 2017: Total capital (to risk weighted assets) Bank: $ 291,800 13.41 % $ 174,002 8.00 % $ 217,502 10.00 % Company: $ 295,048 13.56 % NA NA Tier 1 capital (to risk weighted assets) Bank: $ 267,989 12.32 % $ 130,501 6.00 % $ 174,002 8.00 % Company: $ 237,069 10.90 % NA NA Common Equity Tier 1 (to risk weighted assets) Bank: $ 267,989 12.32 % $ 97,876 4.50 % $ 141,376 6.50 % Company: $ 223,696 10.28 % NA NA Tier 1 capital (to leverage assets) Bank: $ 267,989 10.72 % $ 100,002 4.00 % $ 108,751 5.00 % Company: $ 237,069 9.48 % NA NA As of December 31, 2016: Total capital (to risk weighted assets) Bank: $ 267,416 12.19 % $ 175,555 8.00 % $ 219,444 10.00 % Company: $ 278,444 12.69 % NA NA Tier 1 capital (to risk weighted assets) Bank: $ 244,414 11.14 % $ 131,666 6.00 % $ 175,555 8.00 % Company: $ 221,346 10.08 % NA NA Common Equity Tier 1 (to risk weighted assets) Bank: $ 244,414 11.14 % $ 98,750 4.50 % $ 142,638 6.50 % Company: $ 208,873 9.52 % NA NA Tier 1 capital (to leverage assets) Bank: $ 244,414 9.96 % $ 98,181 4.00 % $ 122,726 5.00 % Company: $ 221,346 9.01 % NA NA

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying consolidated financial statements have been prepared by the Company without audit and in conformity with generally accepted accounting principles in the United States of America for interim financial information. The consolidated financial statements include all adjustments and normal accruals, which the Company considers necessary for a fair presentation of the results of operations for such interim periods. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, as of the date of the balance sheets and income and expenses for the periods. Material estimates particularly susceptible to material change include allowance for loan losses, goodwill and intangibles and other real estate owned are particularly susceptible to change, and actual results could differ from those estimates. The balance sheet data as of December 31, 2016, was derived from audited consolidated financial statements, but does not include all disclosures contained in the Company’s 2016 Form 10-K. 10-K.
Loans	Loans are stated at the amount of unpaid principal net of loan premiums or discounts for purchased loans, net of deferred loan origination fees, discounts associated with retained portions of loans sold, and an allowance for loan losses. Interest on loans is calculated using the simple-interest method on daily balances of the principal amount outstanding. Loan origination fees, net of origination costs and discounts, are amortized over the lives of the loans as adjustments to yield.
Allowance for Loan Losses	Allowance for Loan Losses The allowance for loan losses is established as an amount that management considers adequate to absorb possible losses on existing loans within the portfolio. The allowance consists of general, specific and unallocated components. The general component is based upon all loans collectively evaluated for impairment. The specific component is based upon all loans individually evaluated for impairment. The unallocated component represents credit losses inherent in the loan portfolio that may not have been contemplated in the general risk factors or the specific allowance analysis. Loans are charged against the allowance when management believes the collection of principal and interest is unlikely. The Company performs regular credit reviews of the loan portfolio to determine the credit quality and adherence to underwriting standards. When loans are originated, they are assigned a risk rating that is reassessed periodically during the term of the loan through the credit review process. The Company’s internal risk rating methodology assigns risk ratings ranging from one to ten, where a higher rating represents higher risk. The ten-point Estimated credit losses reflect consideration of all significant factors that affect the collectability of the loan portfolio. The historical loss rate for each group of loans with similar risk characteristics is determined based on the Company’s own loss experience in that group. Historical loss experience and recent trends in losses provide a reasonable starting point for analysis; however, they do not by themselves form a sufficient basis to determine the appropriate level for the allowance for loan losses. Qualitative or environmental factors that are likely to cause estimated credit losses to differ from historical losses are also considered, including but not limited to: • Changes in international, regional and local economic and business conditions and developments that affect the collectability of the portfolio, including the condition of various market segments, • Changes in the nature and volume of the portfolio and in the terms of loans, • Changes in the volume and severity of past due loans, the volume of nonaccrual loans and the volume and severity of adversely classified or graded loans, • Changes in the quality of the institution’s loan review system, • Changes in the value of underlying collateral for collateral-dependent loans, • The existence and effect of any concentrations of credit, and changes in the level of such concentrations, • The effect of other external factors such as competition and legal and regulatory requirements on the level of estimated credit losses in the institution’s existing portfolio, • Changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, • Changes in the current and future U.S. political environment, including debt ceiling negotiations, government shutdown and healthcare reform that may affect national, regional and local economic conditions, taxation, or disruption of national or global financial markets. The adequacy of the allowance for loan losses and the reserve for unfunded commitments is determined using a consistent, systematic methodology and is monitored regularly based on management’s evaluation of numerous factors. For each portfolio segment, these factors include: • The quality of the current loan portfolio, • The trend in the migration of the loan portfolio’s risk ratings, • The velocity of migration of losses and potential losses, • Current economic conditions, • Loan concentrations, • Loan growth rates, • Past-due • Evaluation of specific loss estimates for all significant problem loans, • Recovery experience, and • Peer comparison loss rates.

Securities Available-for-Sale (

Securities Available-for-Sale (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses and Estimated Fair Values of Securities Available-for-Sale	The amortized cost and estimated fair values of securities available-for-sale Amortized Gross Gross Estimated Value Percentage Unrealized Loss Positions Obligations of U.S. government agencies $ 2,000 $ — $ (25 ) $ 1,975 0.44 % Obligations of states and political subdivisions 27,060 — (513 ) 26,547 5.85 % Private-label mortgage-backed securities 10 — — 10 0.00 % Mortgage-backed securities 233,868 — (4,113 ) 229,755 50.64 % SBA pools 19,649 — (298 ) 19,351 4.27 % $ 282,587 $ — $ (4,949 ) $ 277,638 61.20 % Unrealized Gain Positions Obligations of U.S. government agencies $ 23,270 $ 425 $ — $ 23,695 5.22 % Obligations of states and political subdivisions 81,446 2,481 — 83,927 18.50 % Private-label mortgage-backed securities 1,309 199 — 1,508 0.33 % Mortgage-backed securities 48,558 552 — 49,110 10.83 % SBA pools 17,586 196 — 17,782 3.92 % $ 172,169 $ 3,853 $ — $ 176,022 38.80 % $ 454,756 $ 3,853 $ (4,949 ) $ 453,660 100.00 % The amortized cost and estimated fair values of securities available-for-sale Amortized Gross Gross Estimated Percentage Unrealized Loss Positions Obligations of U.S. government agencies $ 3,995 $ — $ (49 ) $ 3,946 0.84 % Obligations of states and political subdivisions 41,016 — (1,279 ) 39,737 8.44 % Private-label mortgage-backed securities 241 — (23 ) 218 0.05 % Mortgage-backed securities 221,835 — (5,362 ) 216,473 45.96 % SBA pools 26,758 — (493 ) 26,265 5.58 % $ 293,845 $ — $ (7,206 ) $ 286,639 60.86 % Unrealized Gain Positions Obligations of U.S. government agencies $ 21,290 $ 384 $ — $ 21,674 4.60 % Obligations of states and political subdivisions 69,148 1,854 — 71,002 15.07 % Private-label mortgage-backed securities 1,566 153 — 1,719 0.36 % Mortgage-backed securities 72,752 811 — 73,563 15.62 % SBA pools 16,281 118 — 16,399 3.48 % $ 181,037 $ 3,320 $ — $ 184,357 39.14 % $ 474,882 $ 3,320 $ (7,206 ) $ 470,996 100.00 %
Schedule of Investment Securities in Continuous Unrealized Loss Position	The following table presents a summary of securities in a continuous unrealized loss position at September 30, 2017: Securities in Gross in Loss Position for 12 Months Securities in Gross in Loss Position for 12 Months or Longer Obligations of U.S. government agencies $ 1,975 $ (25 ) $ — $ — Obligations of states and political subdivisions 12,204 (152 ) 14,343 (361 ) Private-label mortgage-backed securities 10 — — — Mortgage-backed securities 171,984 (2,580 ) 57,771 (1,533 ) SBA pools 7,949 (102 ) 11,402 (196 ) $ 194,122 $ (2,859 ) $ 83,516 $ (2,090 ) The following table presents a summary of securities in a continuous unrealized loss position at December 31, 2016: Securities in Gross in Loss Position for 12 Months Securities in Gross in Loss Position for 12 Months or Longer Obligations of U.S. government agencies $ 3,946 $ (49 ) $ — $ — Obligations of states and political subdivisions 39,737 (1,279 ) — — Private-label mortgage-backed securities — — 218 (23 ) Mortgage-backed securities 211,721 (5,266 ) 4,752 (96 ) SBA pools 22,076 (458 ) 4,189 (35 ) $ 277,480 $ (7,052 ) $ 9,159 $ (154 )
Schedule of Roll-Forward Amount of Credit-Related OTTI	Following is a tabular roll-forward of the aggregate amount of credit-related OTTI at the beginning and end of the periods presented along with the amounts recognized in earnings during the three months and nine months ended September 30, 2017 and 2016: Three months ended Nine months ended 2017 2016 2017 2016 Balance, beginning of period: $ 272 $ 266 $ 270 $ 249 Additions: Initial OTTI credit loss 7 2 9 19 Balance, end of period: $ 279 $ 268 $ 279 $ 268
Schedule of Amortized Cost and Fair Value of Securities Available-for-Sale	The amortized cost and estimated fair value of securities at September 30, 2017, by maturity, are shown below. Obligations of U.S. government agencies, states and political subdivisions and corporate securities are shown by contractual maturity. Mortgage-backed securities and SBA variable pools are shown by projected average life. September 30, 2017 Amortized Estimated Value Due in one year or less $ 24,349 $ 24,340 Due after one year through 5 years 237,873 237,754 Due after 5 years through 10 years 156,651 155,892 Due after 10 years 35,883 35,674 $ 454,756 $ 453,660
Schedule of Investment Securities Pledged to Secure Public Deposits and Repurchase Agreements	The following table presents investment securities which were pledged to secure public deposits and repurchase agreements as permitted or required by law: September 30, 2017 December 31, 2016 Amortized Estimated Value Amortized Estimated Value Pledged to secure public deposits $ 23,025 $ 23,630 $ 25,257 $ 25,683 Pledged to secure repurchase agreements 4,973 4,944 3,579 3,573 $ 27,998 $ 28,574 $ 28,836 $ 29,256

Loans, Allowance for Loan Los23

Loans, Allowance for Loan Losses, and Credit Quality Indicators (Tables)	9 Months Ended
	Sep. 30, 2017
Summary of Loan Classifications	Major classifications of period-end September 30, % of Gross December 31, % of Gross Real estate loans Multi-family residential $ 85,732 4.55 % $ 74,340 4.00 % Residential 1-4 61,379 3.26 % 61,548 3.31 % Owner-occupied commercial 465,536 24.70 % 461,557 24.82 % Nonowner-occupied commercial 453,895 24.08 % 451,893 24.30 % Total permanent real estate loans 1,066,542 56.59 % 1,049,338 56.43 % Construction loans Multi-family residential 19,711 1.05 % 22,252 1.20 % Residential 1-4 48,274 2.56 % 43,532 2.34 % Commercial real estate 96,426 5.12 % 76,301 4.10 % Commercial bare land and acquisition & development 8,635 0.46 % 15,081 0.81 % Residential bare land and acquisition & development 8,836 0.47 % 10,645 0.57 % Total construction real estate loans 181,882 9.66 % 167,811 9.02 % Total real estate loans 1,248,424 66.25 % 1,217,149 65.45 % Commercial loans 619,266 32.85 % 630,491 33.89 % Consumer loans 2,855 0.15 % 2,922 0.16 % Other loans 14,148 0.75 % 9,225 0.50 % Gross loans 1,884,693 100.00 % 1,859,787 100.00 % Deferred loan origination fees (1,851 ) (2,020 ) 1,882,842 1,857,767 Allowance for loan losses (23,363 ) (22,454 ) Total loans, net of allowance for loan losses and net deferred fees $ 1,859,479 $ 1,835,313
Summary of Contractually Required Principal Balance of Purchased Credit Impaired Loans and Carrying Value	The following table represents the contractually required principal balance of purchased credit impaired loans and the carrying balance at September 30, 2017 and December 31, 2016: September 30, December 31, Contractually required principal payments for purchased credit impaired loans $ 18,883 $ 22,941 Accretable yield (1,173 ) (1,453 ) Nonaccretable yield (582 ) (809 ) Balance of purchased credit impaired loans $ 17,128 $ 20,679
Summary of Changes in Accretable Yield for Purchased Credit Impaired Loans	The following tables summarize the changes in the accretable yield for purchased credit impaired loans for the three and nine months ended September 30, 2017 and 2016: Three months ended September 30, 2017 2016 Capital Foundation Total Century Capital Foundation Total Balance, beginning of period $ 682 $ 1,324 $ 2,006 $ — $ 860 $ — $ 860 Additions — — — — — 908 908 Accretion to interest income (45 ) (46 ) (91 ) — (50 ) (22 ) (72 ) Balance, end of period $ 637 $ 1,278 $ 1,915 $ — $ 810 $ 886 $ 1,696 Nine months ended September 30, 2017 2016 Capital Foundation Total Century Capital Foundation Total Balance, beginning of period $ 765 $ 688 $ 1,453 $ 39 $ 1,030 $ — $ 1,069 Additions — 742 742 — — 908 908 Accretion to interest income (128 ) (152 ) (280 ) (39 ) (220 ) (22 ) (281 ) Balance, end of period $ 637 $ 1,278 $ 1,915 $ — $ 810 $ 886 $ 1,696
Summary of Allowance for Credit Losses Activity by Loan Segment	A summary of the activity in the allowance for loan losses by major loan classification follows: For the three months ended September 30, 2017 Commercial Real Estate Construction Consumer Unallocated Total Beginning balance $ 8,693 $ 11,699 $ 2,142 $ 41 $ 876 $ 23,451 Charge-offs (516 ) — — (7 ) — (523 ) Recoveries 30 54 1 — — 85 Provision (reclassification) 481 60 (134 ) 4 (61 ) 350 Ending balance $ 8,688 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,363 For the nine months ended September 30, 2017 Commercial Real Estate Construction Consumer Unallocated Total Beginning balance $ 8,614 $ 10,872 $ 1,781 $ 41 $ 1,146 $ 22,454 Charge-offs (2,844 ) (150 ) — (12 ) — (3,006 ) Recoveries 90 97 2 1 — 190 Provision (reclassification) 2,828 994 226 8 (331 ) 3,725 Ending balance $ 8,688 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,363 At September 30, 2017, the allowance for loan losses on dental loans was $5,373, compared to $4,713 at December 31, 2016. See Note 4 for additional information on the dental loan portfolio. The following table presents the allowance and recorded investment in loans by major loan classification at September 30, 2017 and December 31, 2016: Balances as of September 30, 2017 Commercial Real Estate Construction Consumer Unallocated Total Ending allowance: collectively evaluated for impairment $ 8,679 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,354 Ending allowance: individually evaluated for impairment 9 — — — — 9 Ending allowance: loans acquired with deteriorated credit quality — — — — — — Total ending allowance $ 8,688 $ 11,813 $ 2,009 $ 38 $ 815 $ 23,363 Ending loan balance: collectively evaluated for impairment $ 626,451 $ 1,046,756 $ 181,882 $ 2,855 $ — $ 1,857,944 Ending loan balance: individually evaluated for impairment 2,105 7,516 — — — 9,621 Ending loan balance: loans acquired with deteriorated credit quality 4,858 12,270 — — — 17,128 Total ending loan balance $ 633,414 $ 1,066,542 $ 181,882 $ 2,855 $ — $ 1,884,693 Balances as of December 31, 2016 Commercial Real Estate Construction Consumer Unallocated Total Ending allowance: collectively evaluated for impairment $ 7,881 $ 10,869 $ 1,781 $ 41 $ 1,146 $ 21,718 Ending allowance: individually evaluated for impairment 733 3 — — — 736 Ending allowance: loans acquired with deteriorated credit quality — — — — — — Total ending allowance $ 8,614 $ 10,872 $ 1,781 $ 41 $ 1,146 $ 22,454 Ending loan balance: collectively evaluated for impairment $ 628,773 $ 1,027,354 $ 167,491 $ 2,922 $ — $ 1,826,540 Ending loan balance: individually evaluated for impairment 4,396 7,852 320 — — 12,568 Ending loan balance: loans acquired with deteriorated credit quality 6,547 14,132 — — — 20,679 Total ending loan balance $ 639,716 $ 1,049,338 $ 167,811 $ 2,922 $ — $ 1,859,787
Credit Quality Indicators	The following tables present the Company’s loan portfolio information by loan type and credit grade at September 30, 2017 and December 31, 2016: Credit Quality Indicators As of September 30, 2017 Loan Grade Pass Special Mention Substandard Doubtful Totals Real estate loans Multi-family residential $ 85,732 $ — $ — $ — $ 85,732 Residential 1-4 60,094 — 1,285 — 61,379 Owner-occupied commercial 446,902 — 18,634 — 465,536 Nonowner-occupied commercial 449,306 — 4,589 — 453,895 Total real estate loans 1,042,034 — 24,508 — 1,066,542 Construction Multi-family residential 19,711 — — — 19,711 Residential 1-4 48,274 — — — 48,274 Commercial real estate 96,426 — — — 96,426 Commercial bare land and acquisition & development 8,635 — — — 8,635 Residential bare land and acquisition & development 8,286 — 550 — 8,836 Total construction loans 181,332 — 550 — 181,882 Commercial and other 618,016 — 15,398 — 633,414 Consumer 2,855 — — — 2,855 Totals $ 1,844,237 $ — $ 40,456 $ — $ 1,884,693 Percentage of portfolio 97.85 % 0.00 % 2.15 % 0.00 % 100.00 % Credit Quality Indicators As of December 31, 2016 Loan Grade Pass Special Mention Substandard Doubtful Totals Real estate loans Multi-family residential $ 74,340 $ — $ — $ — $ 74,340 Residential 1-4 58,286 — 3,262 — 61,548 Owner-occupied commercial 443,737 — 17,820 — 461,557 Nonowner-occupied commercial 445,283 — 6,610 — 451,893 Total real estate loans 1,021,646 — 27,692 — 1,049,338 Construction Multi-family residential 22,252 — — — 22,252 Residential 1-4 43,532 — — — 43,532 Commercial real estate 76,301 — — — 76,301 Commercial bare land and acquisition & development 15,081 — — — 15,081 Residential bare land and acquisition & development 9,852 — 793 — 10,645 Total construction loans 167,018 — 793 — 167,811 Commercial and other 621,165 — 16,890 1,661 639,716 Consumer 2,922 — — — 2,922 Totals $ 1,812,751 $ — $ 45,375 $ 1,661 $ 1,859,787 Percentage of portfolio 97.47 % 0.00 % 2.44 % 0.09 % 100.00 %
Aged Analysis of Dental Loans Receivable	The following tables present an aging analysis of past due and nonaccrual loans at September 30, 2017 and December 31, 2016: Age Analysis of Loans Receivable As of September 30, 2017 30-59 Days 60-89 Days Greater Nonaccrual Total Past Total Total Loans Real estate loans Multi-family residential $ — $ — $ — $ — $ — $ 85,732 $ 85,732 Residential 1-4 — — — 185 185 60,478 60,663 Owner-occupied commercial 837 — — 519 1,356 455,671 457,027 Nonowner-occupied commercial — — 1,428 531 1,959 448,893 450,852 Total real estate loans 837 — 1,428 1,235 3,500 1,050,774 1,054,274 Construction Multi-family residential — — — — — 19,711 19,711 Residential 1-4 — — — — — 48,274 48,274 Commercial real estate — — — — — 96,426 96,426 Commercial bare land and acquisition & development 199 — — — 199 8,437 8,636 Residential bare land and acquisition & development — — — — — 8,835 8,835 Total construction loans 199 — — — 199 181,683 181,882 Commercial and other 696 — — 1,479 2,175 626,379 628,554 Consumer 9 2 — — 11 2,844 2,855 Total $ 1,741 $ 2 $ 1,428 $ 2,714 $ 5,885 $ 1,861,680 $ 1,867,565 Age Analysis of Loans Receivable As of December 31, 2016 30-59 60-89 Accruing Greater Still Accruing Nonaccrual Total Past Total Total Loans Real estate loans Multi-family residential $ — $ — $ — $ — $ — $ 74,340 $ 74,340 Residential 1-4 — — — 158 158 59,241 59,399 Owner-occupied commercial — — — — — 452,748 452,748 Nonowner-occupied commercial — — — 601 601 448,118 448,719 Total real estate loans — — — 759 759 1,034,447 1,035,206 Construction Multi-family residential — — — — — 22,252 22,252 Residential 1-4 — — — — — 43,532 43,532 Commercial real estate — — — — — 76,301 76,301 Commercial bare land and acquisition & development — — — — — 15,081 15,081 Residential bare land and acquisition & development — — — — — 10,645 10,645 Total construction loans — — — — — 167,811 167,811 Commercial and other 363 366 — 2,794 3,523 629,646 633,169 Consumer — — — — — 2,922 2,922 Total $ 363 $ 366 $ — $ 3,553 $ 4,282 $ 1,834,826 $ 1,839,108
Analysis of Impaired Loans	The following tables display an analysis of the Company’s impaired loans at September 30, 2017, and December 31, 2016: Impaired Loan Analysis As of September 30, 2017 Recorded Recorded Total Unpaid Average Related Real estate Multi-family residential $ — $ — $ — $ — $ — $ — Residential 1-4 100 — 100 100 101 — Owner-occupied commercial 5,456 — 5,456 5,456 5,467 — Nonowner-occupied commercial 1,960 — 1,960 1,959 1,999 — Total real estate loans 7,516 — 7,516 7,515 7,567 — Construction Multi-family residential — — — — — — Residential 1-4 — — — — — — Commercial real estate — — — — — — Commercial bare land and acquisition & development — — — — — — Residential bare land and acquisition & development — — — — — — Total construction loans — — — — — — Commercial and other 1,627 478 2,105 3,986 2,596 9 Consumer — — — — — — Total impaired loans $ 9,143 $ 478 $ 9,621 $ 11,501 $ 10,163 $ 9 Impaired Loan Analysis As of December 31, 2016 Recorded Recorded Total Unpaid Average Related Real estate Multi-family residential $ — $ — $ — $ — $ — $ — Residential 1-4 454 300 754 775 644 1 Owner-occupied commercial 4,106 865 4,971 4,971 1,804 2 Nonowner-occupied commercial 2,127 — 2,127 2,189 2,228 — Total real estate loans 6,687 1,165 7,852 7,935 4,676 3 Construction Multi-family residential — — — — — — Residential 1-4 — — — — 37 — Commercial real estate — — — — — — Commercial bare land and acquisition & development — — — — — — Residential bare land and acquisition & development 320 — 320 320 1,556 — Total construction loans 320 — 320 320 1,593 — Commercial and other 2,255 2,141 4,396 4,767 3,518 733 Consumer — — — — — — Total impaired loans $ 9,262 $ 3,306 $ 12,568 $ 13,022 $ 9,787 $ 736
Schedule of Troubled Debt Restructurings by Class	The following table displays the Company’s TDRs by class at September 30, 2017 and December 31, 2016: Troubled Debt Restructurings as of September 30, 2017 December 31, 2016 Number of Post-Modification Number of Post-Modification Real estate Multifamily residential — $ — — $ — Residential 1-4 1 100 4 754 Owner-occupied commercial 4 5,215 4 5,447 Non owner-occupied commercial 5 1,959 6 2,127 Total real estate loans 10 7,274 14 8,328 Construction Multifamily residential — — — — Residential 1-4 — — — — Commercial real estate — — — — Commercial bare land and acquisition & development — — — — Residential bare land and acquisition & development — — — — Total construction loans — — — — Commercial and other 15 2,142 16 2,901 Consumer — — — — Total 25 $ 9,416 30 $ 11,229
Schedule of Restructured Loans	Below is a table of the newly restructured loans identified in the nine months ended September 30, 2017. Troubled Debt Restructurings Identified During the nine months ended September 30, 2017 Rate Term Interest-only Combination Real estate Multi-family residential $ — $ — $ — $ — Residential 1-4 — — — 50 Owner-occupied commercial — — — — Nonowner-occupied commercial — — — — Total real estate loans — — — 50 Construction Multi-family residential — — — — Residential 1-4 — — — — Commercial real estate — — — — Commercial bare land and acquisition & development — — — — Residential bare land and acquisition & development — — — — Total construction loans — — — — Commercial and other — — — — Consumer — — — — Total $ — $ — $ — $ 50
Schedule of Troubled Debt Restructurings that Subsequently Defaulted	The following table represents loans receivable modified as TDRs that subsequently defaulted within the first twelve months of restructure during the period. Troubled Debt Restructurings that Subsequently 2017 2016 Number of Recorded Number of Recorded Real estate Multi-family residential — $ — — $ — Residential 1-4 — — — — Owner-occupied commercial — — 1 444 Nonowner-occupied commercial — — — — Total real estate loans — — 1 444 Construction Multi-family residential — — — — Residential 1-4 — — — — Commercial real estate — — — — Commercial bare land and acquisition & development — — — — Residential bare land and acquisition & development — — — — Total construction loans — — — — Commercial and other — — — — Consumer — — — — Total — $ — 1 $ 444
Dental Loan [Member]
Credit Quality Indicators	The following tables present the Company’s dental loan portfolio by market and credit grade at September 30, 2017 and December 31, 2016: As of September 30, 2017 Loan Grade Pass Special Mention Substandard Doubtful Totals Local $ 151,696 $ — $ 2,365 $ — $ 154,061 National 235,090 — 1,182 — 236,272 Total $ 386,786 $ — $ 3,547 $ — $ 390,333 As of December 31, 2016 Loan Grade Pass Special Mention Substandard Doubtful Totals Local $ 148,805 $ — $ 1,463 $ — $ 150,268 National 224,493 — 1,056 1,661 227,210 Total $ 373,298 $ — $ 2,519 $ 1,661 $ 377,478
Aged Analysis of Dental Loans Receivable	The following tables present an aged analysis of the dental loan portfolio by market, including nonaccrual loans, as of September 30, 2017 and December 31, 2016: As of September 30, 2017 30-59 Days 60-89 Days Greater Still Accruing Nonaccrual Total Past Total Total Loans Local $ 74 $ — $ — $ 358 $ 432 $ 153,629 $ 154,061 National — — — 767 767 235,505 236,272 Total $ 74 $ — $ — $ 1,125 $ 1,199 $ 389,134 $ 390,333 As of December 31, 2016 30-59 Days Still Accruing 60-89 Days Greater Than 90 Days Past Due Still Accruing Nonaccrual Total Past Total Total Loans Local $ — $ — $ — $ 407 $ 407 $ 149,861 $ 150,268 National 263 366 — 1,660 2,289 224,921 227,210 Total $ 263 $ 366 $ — $ 2,067 $ 2,696 $ 374,782 $ 377,478

Dental Loan Portfolio (Tables)

Dental Loan Portfolio (Tables)	9 Months Ended
	Sep. 30, 2017
Text Block [Abstract]
Major Classifications of Dental Loans	Major classifications of dental loans at September 30, 2017 and December 31, 2016, were as follows: September 30, December 31, Real estate secured loans: Owner-occupied commercial $ 62,376 $ 63,793 Other dental real estate loans 358 806 Total permanent real estate loans 62,734 64,599 Dental construction loans 10,130 4,109 Total real estate loans 72,864 68,708 Commercial loans 317,469 308,770 Gross loans $ 390,333 $ 377,478
Dental Loan Total by Market	The following table summarizes the Company’s dental lending by borrower location: September 30, December 31, Local $ 154,061 $ 150,268 National 236,272 227,210 Total $ 390,333 $ 377,478
Dental Portfolio Allowance Activity	The specific component is based upon dental loans individually evaluated for impairment. Three months ended Nine months ended September 30, September 30, 2017 2016 2017 2016 Balance, beginning of period $ 5,257 $ 4,151 $ 4,713 $ 4,022 Provision 120 601 2,924 704 Charge-offs (50 ) (9 ) (2,325 ) (9 ) Recoveries 46 55 61 81 Balance, end of period $ 5,373 $ 4,798 $ 5,373 $ 4,798

Securities Sold Under Agreeme25

Securities Sold Under Agreement to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2017
Brokers and Dealers [Abstract]
Schedule of Information Regarding Securities Sold Under Agreements Repurchase	The following table presents information regarding securities sold under agreements to repurchase at September 30, 2017 and December 31, 2016: September 30, December 31, Balance at end of period $ 2,031 $ 1,966 Average balance outstanding for the period 2,134 702 Maximum amount outstanding at any month end during the period 3,100 2,017 Weighted average interest rate for the period 0.08 % 0.06 % Weighted average interest rate at period end 0.07 % 0.08 %

Federal Home Loan Bank Borrow26

Federal Home Loan Bank Borrowings (Tables)	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Summary of Outstanding Federal Home Loan Bank Borrowings by Maturity	Below is a summary of outstanding FHLB borrowings by maturity. Current September 30, Cash management advance NA $ 96,000 2017 0 — 2018 1.55 3,000 2019 0 — 2020 0 — 2021 0 — Thereafter 3.85 2,000 $ 101,000

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Options, Employee Stock SARs, and Employee Cash SARs Exercised	The following table identifies the compensation expense recorded and tax benefits received by the Company on its share-based compensation plans for the three and nine months ended September 30, 2017 and 2016: Three months ended September 30, 2017 2016 Compensation Tax Benefit Compensation Tax Benefit Equity-based awards: Employee RSUs $ 315 $ 120 $ 397 $ 151 Liability-based awards: Employee cash SARs — — — — $ 315 $ 120 $ 397 $ 151 Nine months ended September 30, 2017 2016 Compensation Tax Benefit Compensation Tax Benefit Equity-based awards: Director restricted stock $ — $ — $ 240 $ 91 Employee RSUs 1,042 396 1,187 451 Liability-based awards: Employee cash SARs 150 — — — $ 1,192 $ 396 $ 1,427 $ 542
Schedule of Compensation Expense and Tax Benefits	The following table identifies stock options, employee stock settled SARs, and employee cash settled SARs exercised during the three and nine months ended September 30, 2017 and 2016: Three months ended September 30, 2017 Number Weighted Intrinsic Number Net Cash Stock options — — — — NA Employee stock SARs 77 $ 11.30 — 24 NA Employee cash SARs — — NA NA — 77 — 24 — Nine months ended September 30, 2017 Number Weighted Intrinsic Number Net Cash Stock options 137,307 $ 14.90 $ 1,396 79,601 NA Employee stock SARs 46,798 $ 15.84 116 10,614 NA Employee cash SARs 28,150 $ 16.47 NA NA $ 169 212,255 $ 1,512 90,215 $ 169 Three months ended September 30, 2016 Number Weighted Intrinsic Number Net Cash Stock options 30,074 $ 16.54 $ 9 9,832 NA Employee stock SARs 41,237 $ 15.83 5 1,768 NA Employee cash SARs 27,521 $ 15.95 NA NA $ 45 98,832 $ 14 11,600 $ 45 Nine months ended September 30, 2016 Number Weighted Intrinsic Number Net Cash Stock options 65,034 $ 13.86 $ 117 44,792 NA Employee stock SARs 79,806 $ 14.54 26 6,634 NA Employee cash SARs 47,644 $ 15.11 NA NA $ 73 192,484 143 51,426 73

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Quantitative Information Pertaining to Interest Rate Swaps	The following tables present quantitative information pertaining to the commercial loan related interest rate swaps as of September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 Not-Hedge- Hedge- Not-Hedge- Notional amount $ 8,357 $ 1,492 $ 8,540 Weighted average pay rate 4.58 % 5.71 % 4.85 % Weighted average receive rate 4.32 % 3.54 % 3.63 % Weighted average maturity in years 4.70 6.65 5.45
Summary of Interest Rate Swaps	The following table presents the fair values of derivative instruments and their locations in the consolidated balance sheets as of September 30, 2017 and December 31, 2016: Asset Derivatives Liability Derivatives Derivative Balance sheet location September 30, December 31, September 30, December 31, Cash flow hedge - trust preferred Other assets or other payables $ — $ 91 $ — $ — Interest rate swap designated as hedging instrument Other assets or other payables — 45 — 67 Interest rate swap not designated as hedging instrument Other assets or other payables 17 14 17 14 $ 17 $ 150 $ 17 $ 81 The following table presents the income statement impact of the derivative instruments for the three and nine months ended September 30, 2017 and 2016: Derivative Income statement location Three months ended Nine months ended 2017 2016 2017 2016 Interest rate swap designated as hedging instrument Other noninterest income $ — $ (2 ) $ 4 $ (6 ) $ — $ (2 ) $ 4 $ (6 )

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The following table presents the estimated fair values of the financial instruments at September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 Carrying Fair Value Carrying Fair Value Financial assets: Cash and cash equivalents $ 70,278 $ 70,278 $ 67,113 $ 67,113 Securities available-for-sale 453,660 453,660 470,996 470,996 Loans, net of deferred fees 1,882,842 1,855,447 1,857,767 1,837,673 Accrued interest receivable 6,502 6,502 7,017 7,017 Federal Home Loan Bank stock 7,084 7,084 5,423 5,423 Bank-owned life insurance 35,840 35,840 35,165 35,165 Interest rate swaps 17 17 150 150 Financial liabilities: Deposits $ 2,098,157 2,097,073 $ 2,148,103 $ 2,147,056 Federal Home Loan Bank borrowings 101,000 101,005 65,000 65,043 Subordinated debenture 34,167 34,167 34,096 32,140 Junior subordinated debentures 11,428 7,610 11,311 6,972 Accrued interest payable 672 672 176 176 Interest rate swaps 17 17 81 81
Fair Value Hierarchy for Assets and Liabilities Not Measured at Fair Value	The following table presents information about the level in the fair value hierarchy for the Company’s assets and liabilities not measured and carried at fair value as of September 30, 2017 and December 31, 2016: Carrying Amount Fair Value at September 30, 2017 Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 70,278 $ 70,278 $ — $ — Loans, net of deferred fees 1,882,842 — — 1,855,447 Accrued interest receivable 6,502 6,502 — — Federal Home Loan Bank stock 7,084 7,084 — — Financial liabilities: Deposits $ 2,098,157 $ 1,961,663 $ 135,410 $ — Federal Home Loan Bank borrowings 101,000 — 101,005 — Subordinated debentures 34,167 — 34,167 — Junior subordinated debentures 11,428 — 7,610 — Accrued interest payable 672 672 — — Carrying Amount Fair Value at December 31, 2016 Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 67,113 $ 67,113 $ — $ — Loans 1,857,767 — — 1,837,673 Accrued interest receivable 7,017 7,017 — — Federal Home Loan Bank stock 5,423 5,423 — — Bank-owned life insurance 35,165 35,165 — — Financial liabilities: Deposits $ 2,148,103 $ 1,969,220 $ 177,836 $ — Federal Home Loan Bank borrowings 65,000 — 65,043 — Subordinated debentures 34,096 — 32,140 — Junior subordinated debentures 11,311 — 6,972 — Accrued interest payable 176 176 — —
Assets and Liabilities Measured at Fair Value on Recurring Basis	The tables below show assets and liabilities measured at fair value on a recurring basis as of September 30, 2017 and December 31, 2016: Carrying Fair Value at September 30, 2017 Value Level 1 Level 2 Level 3 Financial Assets Available-for-sale Obligations of U.S. government agencies $ 25,670 $ — $ 25,670 $ — Obligations of states and political subdivisions 110,474 — 110,474 — Agency mortgage-backed securities 278,865 — 278,865 — Private-label mortgage-backed securities 1,518 — 315 1,203 SBA variable rate pools 37,133 — 37,133 — Interest rate swaps 17 17 — — Total assets measured on a recurring basis $ 453,677 $ 17 $ 452,457 $ 1,203 Financial Liabilities Interest rate swap liabilities measured on a recurring basis $ 17 $ 17 $ — $ — Carrying Fair Value at December 31, 2016 Value Level 1 Level 2 Level 3 Available-for-sale Obligations of U.S. government agencies $ 25,620 $ — $ 25,620 $ — Obligations of states and political subdivisions 110,739 — 110,739 — Agency mortgage-backed securities 290,036 — 290,036 — Private-label mortgage-backed securities 1,937 — 569 1,368 SBA variable rate pools 42,664 — 42,664 — Interest rate swaps 150 150 — — Total assets measured on a recurring basis $ 471,146 $ 150 $ 469,628 $ 1,368 Financial Liabilities Interest rate swap liabilities measured on a recurring basis $ 81 $ 81 $ — $ —
Reconciliation of Private-Label Mortgage-Backed Securities Measured at Fair Value on Recurring Basis	The following table provides a reconciliation of private-label mortgage-backed securities measured at fair value on a recurring basis using unobservable inputs (Level 3) for the three and nine months ended September 30, 2017 and 2016: Three months ended Nine months ended September 30, September 30, 2017 2016 2017 2016 Beginning balance $ 1,267 $ 1,399 $ 1,368 $ 1,586 Transfers into level 3 — 70 — 70 Transfers out of Level 3 — — — — Total gains or losses Included in earnings (7 ) (2 ) (9 ) (19 ) Included in other comprehensive income 13 64 70 45 Paydowns (70 ) (77 ) (226 ) (228 ) Purchases, issuances, sales and settlements Purchases — — — — Issuances — — — — Sales — — — — Settlements — — — — Ending balance $ 1,203 $ 1,454 $ 1,203 $ 1,454
Assets Measured at Fair Value on Nonrecurring Basis	The tables below show assets measured at fair value on a nonrecurring basis as of September 30, 2017 and December 31, 2016: Carrying Fair Value September 30, 2017 Value Level 1 Level 2 Level 3 Loans measured for impairment (net of government guarantees and specific reserve) $ 458 $ — $ — $ 458 Carrying Fair Value December 31, 2016 Value Level 1 Level 2 Level 3 Other real estate owned $ 10,936 $ — $ — $ 10,936

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2017
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements	To be categorized as well-capitalized, the Bank must maintain minimum Total capital, Tier 1 capital, common equity Tier 1 to risk-weighted assets and Tier 1 capital to leverage assets ratios as set forth in the following table. Actual For Capital To Be Well Amount Ratio Amount Ratio Amount Ratio As of September 30, 2017: Total capital (to risk weighted assets) Bank: $ 291,800 13.41 % $ 174,002 8.00 % $ 217,502 10.00 % Company: $ 295,048 13.56 % NA NA Tier 1 capital (to risk weighted assets) Bank: $ 267,989 12.32 % $ 130,501 6.00 % $ 174,002 8.00 % Company: $ 237,069 10.90 % NA NA Common Equity Tier 1 (to risk weighted assets) Bank: $ 267,989 12.32 % $ 97,876 4.50 % $ 141,376 6.50 % Company: $ 223,696 10.28 % NA NA Tier 1 capital (to leverage assets) Bank: $ 267,989 10.72 % $ 100,002 4.00 % $ 108,751 5.00 % Company: $ 237,069 9.48 % NA NA As of December 31, 2016: Total capital (to risk weighted assets) Bank: $ 267,416 12.19 % $ 175,555 8.00 % $ 219,444 10.00 % Company: $ 278,444 12.69 % NA NA Tier 1 capital (to risk weighted assets) Bank: $ 244,414 11.14 % $ 131,666 6.00 % $ 175,555 8.00 % Company: $ 221,346 10.08 % NA NA Common Equity Tier 1 (to risk weighted assets) Bank: $ 244,414 11.14 % $ 98,750 4.50 % $ 142,638 6.50 % Company: $ 208,873 9.52 % NA NA Tier 1 capital (to leverage assets) Bank: $ 244,414 9.96 % $ 98,181 4.00 % $ 122,726 5.00 % Company: $ 221,346 9.01 % NA NA

Securities Available-for-Sale -

Securities Available-for-Sale - Schedule of Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses and Estimated Fair Values of Securities Available-for-Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 454,756	$ 474,882
Gross Unrealized Gains	3,853	3,320
Gross Unrealized Losses	(4,949)	(7,206)
Estimated Fair Value	$ 453,660	$ 470,996
Percentage of Portfolio	100.00%	100.00%
Unrealized Loss Positions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 282,587	$ 293,845
Gross Unrealized Losses	(4,949)	(7,206)
Estimated Fair Value	$ 277,638	$ 286,639
Percentage of Portfolio	61.20%	60.86%
Unrealized Loss Positions [Member] | Obligations of U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 2,000	$ 3,995
Gross Unrealized Losses	(25)	(49)
Estimated Fair Value	$ 1,975	$ 3,946
Percentage of Portfolio	0.44%	0.84%
Unrealized Loss Positions [Member] | Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 27,060	$ 41,016
Gross Unrealized Losses	(513)	(1,279)
Estimated Fair Value	$ 26,547	$ 39,737
Percentage of Portfolio	5.85%	8.44%
Unrealized Loss Positions [Member] | Private-Label Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 10	$ 241
Gross Unrealized Losses		(23)
Estimated Fair Value	$ 10	$ 218
Percentage of Portfolio	0.00%	0.05%
Unrealized Loss Positions [Member] | Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 233,868	$ 221,835
Gross Unrealized Losses	(4,113)	(5,362)
Estimated Fair Value	$ 229,755	$ 216,473
Percentage of Portfolio	50.64%	45.96%
Unrealized Loss Positions [Member] | SBA Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 19,649	$ 26,758
Gross Unrealized Losses	(298)	(493)
Estimated Fair Value	$ 19,351	$ 26,265
Percentage of Portfolio	4.27%	5.58%
Unrealized Gain Positions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 172,169	$ 181,037
Gross Unrealized Gains	3,853	3,320
Estimated Fair Value	$ 176,022	$ 184,357
Percentage of Portfolio	38.80%	39.14%
Unrealized Gain Positions [Member] | Obligations of U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 23,270	$ 21,290
Gross Unrealized Gains	425	384
Estimated Fair Value	$ 23,695	$ 21,674
Percentage of Portfolio	5.22%	4.60%
Unrealized Gain Positions [Member] | Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 81,446	$ 69,148
Gross Unrealized Gains	2,481	1,854
Estimated Fair Value	$ 83,927	$ 71,002
Percentage of Portfolio	18.50%	15.07%
Unrealized Gain Positions [Member] | Private-Label Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,309	$ 1,566
Gross Unrealized Gains	199	153
Estimated Fair Value	$ 1,508	$ 1,719
Percentage of Portfolio	0.33%	0.36%
Unrealized Gain Positions [Member] | Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 48,558	$ 72,752
Gross Unrealized Gains	552	811
Estimated Fair Value	$ 49,110	$ 73,563
Percentage of Portfolio	10.83%	15.62%
Unrealized Gain Positions [Member] | SBA Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 17,586	$ 16,281
Gross Unrealized Gains	196	118
Estimated Fair Value	$ 17,782	$ 16,399
Percentage of Portfolio	3.92%	3.48%

Securities Available- for-Sale

Securities Available- for-Sale - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)Securities	Sep. 30, 2016USD ($)Securities	Sep. 30, 2017USD ($)Securities	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)Securities
Schedule of Available-for-sale Securities [Line Items]
Investment securities in unrealized loss positions, number of positions | Securities	167		167		179
Available for sale securities number of securities | Securities	469		469		485
Additional other-than-temporary impairment	$ 7	$ 2	$ 9	$ 19
Aggregate amortized Cost	$ 454,756		$ 454,756		$ 474,882
Projected average life of securities portfolio			4 years 6 months 3 days		4 years 11 months 8 days
Number of investment securities sold | Securities	0	30
Proceeds from sale of investment securities		$ 54,426
Gross gain from investment securities sold		552
Gross loss from investment securities sold		243
Net gain from investment securities sold		$ 309
Balance of repurchase agreement	$ 2,031		$ 2,031		$ 1,966
Substandard [Member]
Schedule of Available-for-sale Securities [Line Items]
Aggregate amortized Cost	$ 1,055		$ 1,055		$ 1,338
Private-Label Mortgage-Backed Securities [Member] | Substandard [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of private-label mortgage-backed securities | Securities	9		9		9

Securities Available-for-Sale33

Securities Available-for-Sale - Schedule of Investment Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Securities in Continuous Unrealized Loss Positions for Less Than 12 Months	$ 194,122
Gross Unrealized Loss on Securities in Loss Position for Less Than 12 Months	(2,859)
Securities in Continuous Unrealized Loss Position for 12 Months or Longer	83,516
Gross Unrealized Loss on Securities in Loss Position for 12 Months or Longer	(2,090)
Unrealized Loss Positions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities in Continuous Unrealized Loss Positions for Less Than 12 Months		$ 277,480
Gross Unrealized Loss on Securities in Loss Position for Less Than 12 Months		(7,052)
Securities in Continuous Unrealized Loss Position for 12 Months or Longer		9,159
Gross Unrealized Loss on Securities in Loss Position for 12 Months or Longer		(154)
Unrealized Loss Positions [Member] | Obligations of U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities in Continuous Unrealized Loss Positions for Less Than 12 Months	1,975	3,946
Gross Unrealized Loss on Securities in Loss Position for Less Than 12 Months	(25)	(49)
Unrealized Loss Positions [Member] | Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities in Continuous Unrealized Loss Positions for Less Than 12 Months	12,204	39,737
Gross Unrealized Loss on Securities in Loss Position for Less Than 12 Months	(152)	(1,279)
Securities in Continuous Unrealized Loss Position for 12 Months or Longer	14,343
Gross Unrealized Loss on Securities in Loss Position for 12 Months or Longer	(361)
Unrealized Loss Positions [Member] | Private-Label Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities in Continuous Unrealized Loss Positions for Less Than 12 Months	10
Securities in Continuous Unrealized Loss Position for 12 Months or Longer		218
Gross Unrealized Loss on Securities in Loss Position for 12 Months or Longer		(23)
Unrealized Loss Positions [Member] | Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities in Continuous Unrealized Loss Positions for Less Than 12 Months	171,984	211,721
Gross Unrealized Loss on Securities in Loss Position for Less Than 12 Months	(2,580)	(5,266)
Securities in Continuous Unrealized Loss Position for 12 Months or Longer	57,771	4,752
Gross Unrealized Loss on Securities in Loss Position for 12 Months or Longer	(1,533)	(96)
Unrealized Loss Positions [Member] | SBA Pools [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities in Continuous Unrealized Loss Positions for Less Than 12 Months	7,949	22,076
Gross Unrealized Loss on Securities in Loss Position for Less Than 12 Months	(102)	(458)
Securities in Continuous Unrealized Loss Position for 12 Months or Longer	11,402	4,189
Gross Unrealized Loss on Securities in Loss Position for 12 Months or Longer	$ (196)	$ (35)

Securities Available-for-Sale34

Securities Available-for-Sale - Schedule of Roll-Forward Amount of Credit-Related OTTI (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Balance, beginning of period:	$ 272	$ 266	$ 270	$ 249
Initial OTTI credit loss	7	2	9	19
Balance, end of period:	$ 279	$ 268	$ 279	$ 268

Securities Available-for-Sale35

Securities Available-for-Sale - Schedule of Amortized Cost and Fair Value of Securities Available-for-Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, Amortized Cost	$ 24,349
Due after one year through 5 years, Amortized Cost	237,873
Due after 5 years through 10 years, Amortized Cost	156,651
Due after 10 years, Amortized Cost	35,883
Amortized Cost	454,756	$ 474,882
Due in one year or less, Estimated Fair Value	24,340
Due after one year through 5 years, Estimated Fair Value	237,754
Due after 5 years through 10 years, Estimated Fair Value	155,892
Due after 10 years, Estimated Fair Value	35,674
Estimated Fair Value	$ 453,660	$ 470,996

Securities Available-for-Sale36

Securities Available-for-Sale - Schedule of Investment Securities Pledged to Secure Public Deposits and Repurchase Agreements (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 454,756	$ 474,882
Collateral Pledged [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	27,998	28,836
Estimated Fair Value	28,574	29,256
Collateral Pledged [Member] | Securities Pledged as Collateral [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,025	25,257
Estimated Fair Value	23,630	25,683
Collateral Pledged [Member] | Repurchase Accounts [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,973	3,579
Estimated Fair Value	$ 4,944	$ 3,573

Loans, Allowance for Loan Los37

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Summary of Loan Classifications (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 1,884,693	$ 1,859,787
Deferred loan origination fees	(1,851)	(2,020)
Gross loans, net of deferred income	1,882,842	1,857,767
Allowance for loan losses	(23,363)	(22,454)
Total loans, net of allowance for loan losses and net deferred fees	$ 1,859,479	$ 1,835,313
Percentage of gross loans	100.00%	100.00%
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 619,266	$ 630,491
Percentage of gross loans	32.85%	33.89%
Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 14,148	$ 9,225
Percentage of gross loans	0.75%	0.50%
Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 1,066,542	$ 1,049,338
Real Estate Loans [Member] | Multi-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	85,732	74,340
Real Estate Loans [Member] | Residential 1-4 Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	61,379	61,548
Real Estate Loans [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	465,536	461,557
Real Estate Loans [Member] | Nonowner-Occupied Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	453,895	451,893
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	2,855	2,922
Allowance for loan losses	$ (38)	$ (41)
Percentage of gross loans	0.15%	0.16%
Real Estate Secured Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 1,248,424	$ 1,217,149
Percentage of gross loans	66.25%	65.45%
Real Estate Secured Loans [Member] | Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 1,066,542	$ 1,049,338
Percentage of gross loans	56.59%	56.43%
Real Estate Secured Loans [Member] | Real Estate Loans [Member] | Multi-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 85,732	$ 74,340
Percentage of gross loans	4.55%	4.00%
Real Estate Secured Loans [Member] | Real Estate Loans [Member] | Residential 1-4 Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 61,379	$ 61,548
Percentage of gross loans	3.26%	3.31%
Real Estate Secured Loans [Member] | Real Estate Loans [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 465,536	$ 461,557
Percentage of gross loans	24.70%	24.82%
Real Estate Secured Loans [Member] | Real Estate Loans [Member] | Nonowner-Occupied Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 453,895	$ 451,893
Percentage of gross loans	24.08%	24.30%
Real Estate Secured Loans [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 181,882	$ 167,811
Percentage of gross loans	9.66%	9.02%
Real Estate Secured Loans [Member] | Construction Loans [Member] | Multi-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 19,711	$ 22,252
Percentage of gross loans	1.05%	1.20%
Real Estate Secured Loans [Member] | Construction Loans [Member] | Residential 1-4 Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 48,274	$ 43,532
Percentage of gross loans	2.56%	2.34%
Real Estate Secured Loans [Member] | Construction Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 96,426	$ 76,301
Percentage of gross loans	5.12%	4.10%
Real Estate Secured Loans [Member] | Construction Loans [Member] | Commercial Bare Land and Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 8,635	$ 15,081
Percentage of gross loans	0.46%	0.81%
Real Estate Secured Loans [Member] | Construction Loans [Member] | Residential Bare Land and Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross loans	$ 8,836	$ 10,645
Percentage of gross loans	0.47%	0.57%

Loans, Allowance for Loan Los38

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Additional Information (Detail)	Sep. 30, 2017USD ($)RiskRating	Dec. 31, 2016USD ($)	Sep. 30, 2017USD ($)RiskRating	Sep. 30, 2017USD ($)RiskRatingContract	Dec. 31, 2016USD ($)Contract	Jun. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Guarantor Obligations [Line Items]
Outstanding loans to dental professionals	$ 1,859,479,000	$ 1,835,313,000	$ 1,859,479,000	$ 1,859,479,000	$ 1,835,313,000
Percentage of total outstanding loans to dental dental professionals	20.71%	20.30%
Percentage of total loan portfolio					10.00%
Percentage of loan portfolio collateralized by real estate				66.25%
Allowance for loan losses	$ 23,363,000	$ 22,454,000	23,363,000	$ 23,363,000	$ 22,454,000	$ 23,451,000
Valuation allowance for impaired loans	9,000	736,000	9,000	9,000	736,000
Recorded investment in impaired loans, net of government guarantees	7,260,000	10,567,000	7,260,000	7,260,000	10,567,000
Loan unfunded commitments on classified loans	941,000	1,026,000	941,000	941,000	1,026,000
Interest income recognized in the period				0
Government guarantees	2,361,000	2,001,000	2,361,000	$ 2,361,000	$ 2,001,000
Identified TDRs newly considered for impairment | Contract				1
Troubled debt restructuring identified during the period | Contract				25	30
Commitments to lend additional funds on loans restructured as TDRs	0	0	0	$ 0	$ 0
Troubled Debt Restructurings [Member]
Guarantor Obligations [Line Items]
Recorded investment in nonaccrual status	1,630,000	2,250,000	$ 1,630,000	1,630,000	2,250,000
Troubled debt restructuring identified during the period			0
Allowance for Loan Losses [Member]
Guarantor Obligations [Line Items]
Valuation allowance for impaired loans	9,621,000	12,568,000	$ 9,621,000	9,621,000	12,568,000
Dental Loan [Member]
Guarantor Obligations [Line Items]
Outstanding loans to dental professionals	390,333,000	$ 377,478,000	390,333,000	$ 390,333,000	377,478,000
Percentage of total outstanding loans to dental dental professionals		20.30%		20.71%
Allowance for loan losses	$ 5,373,000	$ 4,713,000	$ 5,373,000	$ 5,373,000	$ 4,713,000	$ 5,257,000	$ 4,798,000	$ 4,151,000	$ 4,022,000
Minimum [Member]
Guarantor Obligations [Line Items]
Internal risk rating | RiskRating	1		1	1
Maximum [Member]
Guarantor Obligations [Line Items]
Internal risk rating | RiskRating	10		10	10

Loans, Allowance for Loan Los39

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Summary of Contractually Required Principal Balance of Purchased Credit Impaired Loans and Carrying Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Receivables [Abstract]
Contractually required principal payments for purchased credit impaired loans	$ 18,883	$ 22,941
Accretable yield	(1,173)	(1,453)
Nonaccretable yield	(582)	(809)
Balance of purchased credit impaired loans	$ 17,128	$ 20,679

Loans, Allowance for Loan Los40

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Summary of Changes in Accretable Yield for Purchased Credit Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Impaired Loans By Type [Line Items]
Balance, beginning of period	$ 2,006	$ 860	$ 1,453	$ 1,069
Additions		908	742	908
Accretion to interest income	(91)	(72)	(280)	(281)
Balance, end of period	1,915	1,696	1,915	1,696
Century [Member]
Impaired Loans By Type [Line Items]
Balance, beginning of period				39
Accretion to interest income				(39)
Capital Pacific Bank [Member]
Impaired Loans By Type [Line Items]
Balance, beginning of period	682	860	765	1,030
Accretion to interest income	(45)	(50)	(128)	(220)
Balance, end of period	637	810	637	810
Foundation Bancorp Inc [Member]
Impaired Loans By Type [Line Items]
Balance, beginning of period	1,324		688
Additions		908	742	908
Accretion to interest income	(46)	(22)	(152)	(22)
Balance, end of period	$ 1,278	$ 886	$ 1,278	$ 886

Loans, Allowance for Loan Los41

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Summary of Allowance for Credit Losses Activity by Loan Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 23,451		$ 22,454
Charge-offs	(523)		(3,006)
Recoveries	85		190
Provision (reclassification)	350	$ 1,380	3,725	$ 3,575
Balance, end of period	23,363		23,363
Ending allowance: collectively evaluated for impairment	23,354		23,354		$ 21,718
Ending allowance: individually evaluated for impairment	9		9		736
Total ending allowance	23,363		23,363		22,454
Ending loan balance: collectively evaluated for impairment	1,857,944		1,857,944		1,826,540
Ending loan balance: individually evaluated for impairment	9,621		9,621		12,568
Total ending loan balance	1,884,693		1,884,693		1,859,787
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending loan balance: loans acquired with deteriorated credit quality	17,128		17,128		20,679
Commercial and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	8,693		8,614
Charge-offs	(516)		(2,844)
Recoveries	30		90
Provision (reclassification)	481		2,828
Balance, end of period	8,688		8,688
Ending allowance: collectively evaluated for impairment	8,679		8,679		7,881
Ending allowance: individually evaluated for impairment	9		9		733
Total ending allowance	8,688		8,688		8,614
Ending loan balance: collectively evaluated for impairment	626,451		626,451		628,773
Ending loan balance: individually evaluated for impairment	2,105		2,105		4,396
Total ending loan balance	633,414		633,414		639,716
Commercial and Other [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending loan balance: loans acquired with deteriorated credit quality	4,858		4,858		6,547
Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	11,699		10,872
Charge-offs			(150)
Recoveries	54		97
Provision (reclassification)	60		994
Balance, end of period	11,813		11,813
Ending allowance: collectively evaluated for impairment	11,813		11,813		10,869
Ending allowance: individually evaluated for impairment					3
Total ending allowance	11,813		11,813		10,872
Ending loan balance: collectively evaluated for impairment	1,046,756		1,046,756		1,027,354
Ending loan balance: individually evaluated for impairment	7,516		7,516		7,852
Total ending loan balance	1,066,542		1,066,542		1,049,338
Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending loan balance: loans acquired with deteriorated credit quality	12,270		12,270		14,132
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	2,142		1,781
Recoveries	1		2
Provision (reclassification)	(134)		226
Balance, end of period	2,009		2,009
Ending allowance: collectively evaluated for impairment	2,009		2,009		1,781
Total ending allowance	2,009		2,009		1,781
Ending loan balance: collectively evaluated for impairment	181,882		181,882		167,491
Ending loan balance: individually evaluated for impairment					320
Total ending loan balance	181,882		181,882		167,811
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	41		41
Charge-offs	(7)		(12)
Recoveries			1
Provision (reclassification)	4		8
Balance, end of period	38		38
Ending allowance: collectively evaluated for impairment	38		38		41
Total ending allowance	38		38		41
Ending loan balance: collectively evaluated for impairment	2,855		2,855		2,922
Total ending loan balance	2,855		2,855		2,922
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	876		1,146
Provision (reclassification)	(61)		(331)
Balance, end of period	815		815
Ending allowance: collectively evaluated for impairment	815		815		1,146
Total ending allowance	$ 815		$ 815		$ 1,146

Loans, Allowance for Loan Los42

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Credit Quality Indicators (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Percentage of portfolio	100.00%	100.00%
Loan Grade	$ 1,884,693	$ 1,859,787
Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	1,066,542	1,049,338
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	181,882	167,811
Commercial and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	633,414	639,716
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	2,855	2,922
Multi-Family Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	85,732	74,340
Multi-Family Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	19,711	22,252
Residential 1-4 Family [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	61,379	61,548
Residential 1-4 Family [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	48,274	43,532
Owner-Occupied Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	465,536	461,557
Nonowner-Occupied Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	453,895	451,893
Commercial Real Estate [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	96,426	76,301
Commercial Bare Land and Acquisition & Development [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	8,635	15,081
Residential Bare Land and Acquisition & Development [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	$ 8,836	$ 10,645
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of portfolio	97.85%	97.47%
Loan Grade	$ 1,844,237	$ 1,812,751
Pass [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	1,042,034	1,021,646
Pass [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	181,332	167,018
Pass [Member] | Commercial and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	618,016	621,165
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	2,855	2,922
Pass [Member] | Multi-Family Residential [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	85,732	74,340
Pass [Member] | Multi-Family Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	19,711	22,252
Pass [Member] | Residential 1-4 Family [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	60,094	58,286
Pass [Member] | Residential 1-4 Family [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	48,274	43,532
Pass [Member] | Owner-Occupied Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	446,902	443,737
Pass [Member] | Nonowner-Occupied Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	449,306	445,283
Pass [Member] | Commercial Real Estate [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	96,426	76,301
Pass [Member] | Commercial Bare Land and Acquisition & Development [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	8,635	15,081
Pass [Member] | Residential Bare Land and Acquisition & Development [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	$ 8,286	$ 9,852
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of portfolio	0.00%	0.00%
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of portfolio	2.15%	2.44%
Loan Grade	$ 40,456	$ 45,375
Substandard [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	24,508	27,692
Substandard [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	550	793
Substandard [Member] | Commercial and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	15,398	16,890
Substandard [Member] | Residential 1-4 Family [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	1,285	3,262
Substandard [Member] | Owner-Occupied Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	18,634	17,820
Substandard [Member] | Nonowner-Occupied Commercial [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	4,589	6,610
Substandard [Member] | Residential Bare Land and Acquisition & Development [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade	$ 550	$ 793
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Percentage of portfolio	0.00%	0.09%
Loan Grade		$ 1,661
Doubtful [Member] | Commercial and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Grade		$ 1,661

Loans, Allowance for Loan Los43

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Aged Analysis of Dental Loans Receivable (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	$ 1,884,693	$ 1,859,787
Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	1,066,542	1,049,338
Real Estate Loans [Member] | Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	85,732	74,340
Real Estate Loans [Member] | Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	61,379	61,548
Real Estate Loans [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	465,536	461,557
Real Estate Loans [Member] | Nonowner-Occupied Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	453,895	451,893
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	181,882	167,811
Construction [Member] | Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	19,711	22,252
Construction [Member] | Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	48,274	43,532
Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	96,426	76,301
Construction [Member] | Commercial Bare Land and Acquisition & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	8,635	15,081
Construction [Member] | Residential Bare Land and Acquisition & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	8,836	10,645
Commercial and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	633,414	639,716
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total ending loan balance	2,855	2,922
Age Analysis of Loans Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	2,714	3,553
Total Past Due and Nonaccrual	5,885	4,282
Total Current	1,861,680	1,834,826
Total ending loan balance	1,867,565	1,839,108
Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,235	759
Total Past Due and Nonaccrual	3,500	759
Total Current	1,050,774	1,034,447
Total ending loan balance	1,054,274	1,035,206
Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member] | Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	85,732	74,340
Total ending loan balance	85,732	74,340
Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member] | Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	185	158
Total Past Due and Nonaccrual	185	158
Total Current	60,478	59,241
Total ending loan balance	60,663	59,399
Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	519
Total Past Due and Nonaccrual	1,356
Total Current	455,671	452,748
Total ending loan balance	457,027	452,748
Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member] | Nonowner-Occupied Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	531	601
Total Past Due and Nonaccrual	1,959	601
Total Current	448,893	448,118
Total ending loan balance	450,852	448,719
Age Analysis of Loans Receivable [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Nonaccrual	199
Total Current	181,683	167,811
Total ending loan balance	181,882	167,811
Age Analysis of Loans Receivable [Member] | Construction [Member] | Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	19,711	22,252
Total ending loan balance	19,711	22,252
Age Analysis of Loans Receivable [Member] | Construction [Member] | Residential 1-4 Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	48,274	43,532
Total ending loan balance	48,274	43,532
Age Analysis of Loans Receivable [Member] | Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	96,426	76,301
Total ending loan balance	96,426	76,301
Age Analysis of Loans Receivable [Member] | Construction [Member] | Commercial Bare Land and Acquisition & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Nonaccrual	199
Total Current	8,437	15,081
Total ending loan balance	8,636	15,081
Age Analysis of Loans Receivable [Member] | Construction [Member] | Residential Bare Land and Acquisition & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current	8,835	10,645
Total ending loan balance	8,835	10,645
Age Analysis of Loans Receivable [Member] | Commercial and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,479	2,794
Total Past Due and Nonaccrual	2,175	3,523
Total Current	626,379	629,646
Total ending loan balance	628,554	633,169
Age Analysis of Loans Receivable [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due and Nonaccrual	11
Total Current	2,844	2,922
Total ending loan balance	2,855	2,922
30 to 59 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	1,741	363
30 to 59 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	837
30 to 59 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	837
30 to 59 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	199
30 to 59 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Construction [Member] | Commercial Bare Land and Acquisition & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	199
30 to 59 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Commercial and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	696	363
30 to 59 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	9
60 to 89 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	2	366
60 to 89 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Commercial and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing		$ 366
60 to 89 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	2
Grater Than 90 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	1,428
Grater Than 90 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	1,428
Grater Than 90 Days Past Due Still Accruing [Member] | Age Analysis of Loans Receivable [Member] | Real Estate Loans [Member] | Nonowner-Occupied Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past Due Loans Still Accruing	$ 1,428

Loans, Allowance for Loan Los44

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Analysis of Impaired Loans (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation	$ 9,143	$ 9,262
Recorded Investment With Specific Allowance Valuation	478	3,306
Total Recorded Investment	9,621	12,568
Unpaid Principal Balance	11,501	13,022
Average Recorded Investment	10,163	9,787
Related Specific Allowance Valuation	9	736
Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation	7,516	6,687
Recorded Investment With Specific Allowance Valuation		1,165
Total Recorded Investment	7,516	7,852
Unpaid Principal Balance	7,515	7,935
Average Recorded Investment	7,567	4,676
Related Specific Allowance Valuation		3
Real Estate [Member] | Residential 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation	100	454
Recorded Investment With Specific Allowance Valuation		300
Total Recorded Investment	100	754
Unpaid Principal Balance	100	775
Average Recorded Investment	101	644
Related Specific Allowance Valuation		1
Real Estate [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation	5,456	4,106
Recorded Investment With Specific Allowance Valuation		865
Total Recorded Investment	5,456	4,971
Unpaid Principal Balance	5,456	4,971
Average Recorded Investment	5,467	1,804
Related Specific Allowance Valuation		2
Real Estate [Member] | Nonowner-Occupied Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation	1,960	2,127
Total Recorded Investment	1,960	2,127
Unpaid Principal Balance	1,959	2,189
Average Recorded Investment	1,999	2,228
Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation		320
Total Recorded Investment		320
Unpaid Principal Balance		320
Average Recorded Investment		1,593
Construction [Member] | Residential 1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment		37
Construction [Member] | Residential Bare Land and Acquisition & Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation		320
Total Recorded Investment		320
Unpaid Principal Balance		320
Average Recorded Investment		1,556
Commercial and Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Allowance Valuation	1,627	2,255
Recorded Investment With Specific Allowance Valuation	478	2,141
Total Recorded Investment	2,105	4,396
Unpaid Principal Balance	3,986	4,767
Average Recorded Investment	2,596	3,518
Related Specific Allowance Valuation	$ 9	$ 733

Loans, Allowance for Loan Los45

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Schedule of Troubled Debt Restructurings by Class (Detail) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	25	30
Outstanding Recorded Investment | $	$ 9,416	$ 11,229
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	10	14
Outstanding Recorded Investment | $	$ 7,274	$ 8,328
Real Estate [Member] | Residential 1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	4
Outstanding Recorded Investment | $	$ 100	$ 754
Real Estate [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	4	4
Outstanding Recorded Investment | $	$ 5,215	$ 5,447
Real Estate [Member] | Nonowner-Occupied Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	5	6
Outstanding Recorded Investment | $	$ 1,959	$ 2,127
Commercial and Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	15	16
Outstanding Recorded Investment | $	$ 2,142	$ 2,901

Loans, Allowance for Loan Los46

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Schedule of Restructured Loans (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Combination Modification	$ 9,416	$ 11,229
Combination Modification[Member]
Financing Receivable, Modifications [Line Items]
Combination Modification	50
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Combination Modification	7,274	8,328
Real Estate [Member] | Residential 1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
Combination Modification	100	$ 754
Real Estate [Member] | Combination Modification[Member]
Financing Receivable, Modifications [Line Items]
Combination Modification	50
Real Estate [Member] | Combination Modification[Member] | Residential 1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
Combination Modification	$ 50

Loans, Allowance for Loan Los47

Loans, Allowance for Loan Losses, and Credit Quality Indicators - Schedule of Troubled Debt Restructurings that Subsequently Defaulted (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1
Recorded Investment | $	$ 444
Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1
Recorded Investment | $	$ 444
Real Estate [Member] | Owner-Occupied Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1
Recorded Investment | $	$ 444

Dental Loan Portfolio - Additio

Dental Loan Portfolio - Additional Information (Detail) $ in Thousands	Sep. 30, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2017USD ($)State
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable	$ 1,859,479	$ 1,835,313	$ 1,859,479
Percentage of total outstanding loans	20.71%	20.30%
Government guarantees	$ 4,658	$ 5,641	$ 4,658
Percentage of outstanding dental loan	1.19%	1.49%
Number of national loan states | State			45
Dental Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable	$ 390,333	$ 377,478	$ 390,333
Percentage of total outstanding loans		20.30%	20.71%

Dental Loan Portfolio - Major C

Dental Loan Portfolio - Major Classifications of Dental Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	$ 1,859,479	$ 1,835,313
Dental Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	390,333	377,478
Residential Portfolio Segment [Member] | Dental Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	72,864	68,708
Residential Portfolio Segment [Member] | Dental Loan [Member] | Other Dental Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	358	806
Residential Portfolio Segment [Member] | Dental Loan [Member] | Owner-Occupied Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	62,376	63,793
Residential Portfolio Segment [Member] | Dental Loan [Member] | Dental Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	10,130	4,109
Real Estate Loans [Member] | Dental Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	62,734	64,599
Commercial and Other [Member] | Dental Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	$ 317,469	$ 308,770

Dental Loan Portfolio - Dental

Dental Loan Portfolio - Dental Loan Total by Market (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable	$ 1,859,479	$ 1,835,313
Dental Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable	390,333	377,478
Dental Loan [Member] | Local [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable	154,061	150,268
Dental Loan [Member] | National [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable	$ 236,272	$ 227,210

Dental Loan Portfolio - Denta51

Dental Loan Portfolio - Dental Portfolio Allowance Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 23,451		$ 22,454
Charge-offs	(523)		(3,006)
Recoveries	85		190
Balance, end of period	23,363		23,363
Dental Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	5,257	$ 4,151	4,713	$ 4,022
Provision	120	601	2,924	704
Charge-offs	(50)	(9)	(2,325)	(9)
Recoveries	46	55	61	81
Balance, end of period	$ 5,373	$ 4,798	$ 5,373	$ 4,798

Dental Loan Portfolio - Credit

Dental Loan Portfolio - Credit Quality Indicators (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	$ 1,859,479	$ 1,835,313
Dental Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	390,333	377,478
Dental Loan [Member] | Local [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	154,061	150,268
Dental Loan [Member] | National [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	236,272	227,210
Pass [Member] | Dental Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	386,786	373,298
Pass [Member] | Dental Loan [Member] | Local [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	151,696	148,805
Pass [Member] | Dental Loan [Member] | National [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	235,090	224,493
Substandard [Member] | Dental Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	3,547	2,519
Substandard [Member] | Dental Loan [Member] | Local [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	2,365	1,463
Substandard [Member] | Dental Loan [Member] | National [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable	$ 1,182	1,056
Doubtful [Member] | Dental Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable		1,661
Doubtful [Member] | Dental Loan [Member] | National [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans Receivable		$ 1,661

Dental Loan Portfolio - Aged An

Dental Loan Portfolio - Aged Analysis of Dental Loans Receivable (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net loans	$ 1,859,479	$ 1,835,313
Dental Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due Still Accruing	74	263
60-89 Days Past Due Still Accruing		366
Greater Than 90 Days Still Accruing	0	0
Nonaccrual	1,125	2,067
Total Past Due and Nonaccrual	1,199	2,696
Total Current	389,134	374,782
Net loans	390,333	377,478
Dental Loan [Member] | Local [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due Still Accruing	74
Greater Than 90 Days Still Accruing	0	0
Nonaccrual	358	407
Total Past Due and Nonaccrual	432	407
Total Current	153,629	149,861
Net loans	154,061	150,268
Dental Loan [Member] | National [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due Still Accruing		263
60-89 Days Past Due Still Accruing		366
Greater Than 90 Days Still Accruing	0	0
Nonaccrual	767	1,660
Total Past Due and Nonaccrual	767	2,289
Total Current	235,505	224,921
Net loans	$ 236,272	$ 227,210

Securities Sold Under Agreeme54

Securities Sold Under Agreement to Repurchase - Schedule of Information Regarding Securities Sold Under Agreements Repurchase (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Disclosure of Repurchase Agreements [Abstract]
Securities sold under agreements to repurchase	$ 2,031,000	$ 1,966,000
Average balance outstanding for the period	2,134,000	702,000
Maximum amount outstanding at any month end during the period	$ 3,100,000	$ 2,017,000
Weighted average interest rate for the period	0.08%	0.06%
Weighted average interest rate at period end	0.07%	0.08%

Federal Funds and Overnight F55

Federal Funds and Overnight Funds Purchased - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Federal Home Loan Banks [Abstract]
Unsecured federal funds borrowing lines	$ 154,000,000	$ 154,000,000
Unsecured federal funds borrowing lines outstanding	0	0
Secured overnight borrowing line from Federal Reserve Bank	87,965,000	80,784,000
Commercial loans pledged for Federal Reserve Bank borrowing line	142,321,000	143,679,000
Outstanding borrowings	$ 0	$ 0

Federal Home Loan Bank Borrow56

Federal Home Loan Bank Borrowings - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Percentage of federal home loan bank borrowings	35.00%
FHLB maximum borrowing line	$ 891,318,000	$ 889,503,000
Pledged real estate loans and securities	896,580,000	867,596,000
Discounted value on pledged real estate loans and securities	632,226,000	632,202,000
Federal Home Loan Bank borrowings	$ 101,000,000	$ 65,000,000

Federal Home Loan Bank Borrow57

Federal Home Loan Bank Borrowings - Summary of Outstanding Federal Home Loan Bank Borrowings by Maturity (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank borrowings	$ 101,000	$ 65,000
Cash Management Advance [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal Home Loan Bank borrowings	$ 96,000
2017 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB borrowings, maturity date	2,017
Current Rates	0.00%
2018 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB borrowings, maturity date	2,018
Current Rates	1.55%
Federal Home Loan Bank borrowings	$ 3,000
2019 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB borrowings, maturity date	2,019
Current Rates	0.00%
2020 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB borrowings, maturity date	2,020
Current Rates	0.00%
2021 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB borrowings, maturity date	2,021
Current Rates	0.00%
Thereafter [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Current Rates	3.85%
Federal Home Loan Bank borrowings	$ 2,000

Borrowed Funds - Additional Inf

Borrowed Funds - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 06, 2016	Sep. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Debt Instrument [Line Items]
Junior subordinated debentures		$ 11,428	$ 11,311
Subordinated Debentures [Member]
Debt Instrument [Line Items]
Fair value of debentures		$ 34,167	34,096
Subordinated Debentures [Member] | Public Offering [Member]
Debt Instrument [Line Items]
Debentures, principal amount				$ 35,000
Debentures, callable description		The Notes are callable at par after five years.
Debentures, maturity date		Sep. 30, 2026
Debenture interest accrued and paid		5.875%
Debentures, interest rate terms		Bear interest at a fixed annual rate of 5.875% per year, from and including June 27, 2016, but excluding September 30, 2021. From and including September 30, 2021 to the maturity date or early redemption date, the interest rate will reset quarterly to an annual interest rate equal to the then-current three-month LIBOR plus 471.5 basis points.
Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Debenture interest accrued and paid		6.265%
Junior subordinated debentures		$ 8,248
Variable rate of securities		LIBOR plus 135 basis points
Fair value of debentures		$ 11,428	$ 11,311
Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Trust preferred securities, liquidation amount		$ 8,000
Trust preferred securities, interest rate		6.265%
Trust preferred securities, interest rate terms		The interest rate on the TPS was 6.265% until January 2011, after which it was converted to a floating rate of three-month LIBOR plus 135 basis points.
Trust preferred securities, maturity year		2,035
Trust preferred securities, callable date		Jan. 7, 2011
London Interbank Offered Rate (LIBOR) [Member] | Subordinated Debentures [Member] | Public Offering [Member]
Debt Instrument [Line Items]
Variable rate of securities		4.715%
London Interbank Offered Rate (LIBOR) [Member] | Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Variable rate of securities		1.35%
London Interbank Offered Rate (LIBOR) [Member] | Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Trust preferred securities, variable rate		1.35%
Foundation Bancorp Inc [Member]
Debt Instrument [Line Items]
Acquisition date		Sep. 6, 2016
Foundation Bancorp Inc [Member] | Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Debentures, interest rate terms		The interest rate on these trust preferred securities is a floating rate of three-month LIBOR plus 173 basis points.
Junior subordinated debentures	$ 6,148
Fair value of debentures	3,013
Foundation Bancorp Inc [Member] | Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Trust preferred securities, liquidation amount	$ 6,000
Foundation Bancorp Inc [Member] | London Interbank Offered Rate (LIBOR) [Member] | Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Variable rate of securities	1.73%

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) $ in Thousands	Sep. 30, 2017USD ($)shares	Sep. 30, 2017USD ($)shares
2006 SOEC Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, authorized shares | shares	1,550,000	1,550,000
Maximum percentage of awards to be granted at exercise prices		100.00%
Stock Options [Member] | Minimum [Member] | 2006 SOEC Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award vesting period		4 years
Stock Options [Member] | Maximum [Member] | 2006 SOEC Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, award vesting period		10 years
Employee RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense | $	$ 2,019	$ 2,019
Forfeiture rate	13.00%
Weighted-average period of time	2 years 3 months 4 days

Share-Based Compensation - Sche

Share-Based Compensation - Schedule of Compensation Expense and Tax Benefits (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	$ 315	$ 397	$ 1,192	$ 1,427
Tax Benefit	120	151	396	542
Director Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense				240
Tax Benefit				91
Employee RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	315	397	1,042	1,187
Tax Benefit	$ 120	$ 151	396	$ 451
Employee Cash SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense			$ 150

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Stock Options, Employee Stock SARs, and Employee Cash SARs Exercised (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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised	77	98,832	212,255	192,484
Intrinsic Value		$ 14	$ 1,512	$ 143
Number of Shares Issued	24	11,600	90,215	51,426
Net Cash Payment to Employees		$ 45	$ 169	$ 73
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised		30,074	137,307	65,034
Weighted Average Exercise Price		$ 16.54	$ 14.90	$ 13.86
Intrinsic Value		$ 9	$ 1,396	$ 117
Number of Shares Issued		9,832	79,601	44,792
Employee Stock SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised	77	41,237	46,798	79,806
Weighted Average Exercise Price	$ 11.30	$ 15.83	$ 15.84	$ 14.54
Intrinsic Value		$ 5	$ 116	$ 26
Number of Shares Issued	24	1,768	10,614	6,634
Employee Cash SARs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Exercised		27,521	28,150	47,644
Weighted Average Exercise Price		$ 15.95	$ 16.47	$ 15.11
Net Cash Payment to Employees		$ 45	$ 169	$ 73

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)Interest_Rate_Swaps	Dec. 31, 2016USD ($)
Derivatives, Fair Value [Line Items]
Collateral posting	$ 250	$ 250
Fixed Rate Note [Member]
Derivatives, Fair Value [Line Items]
Debt instrument term	10 years
Debt instrument interest rate	5.71%
Debt instrument maturity date	Aug. 31, 2023
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 8,357	8,540
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative notional amount		1,492
Interest Rate Swap Agreement [Member]
Derivatives, Fair Value [Line Items]
Number of derivative instruments | Interest_Rate_Swaps	2
Interest Rate Swap Agreement [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 8,357	$ 8,540
Interest Rate Swap Agreement [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
One-time termination fee	$ 71

Derivative Instruments - Summar

Derivative Instruments - Summary of Quantitative Information Pertaining to Interest Rate Swaps (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amount	$ 8,357	$ 8,540
Weighted average maturity in years	4 years 8 months 12 days	5 years 5 months 12 days
Not Designated as Hedging Instrument [Member] | Pay Rate [Member]
Derivatives, Fair Value [Line Items]
Weighted average pay rate	4.58%	4.85%
Not Designated as Hedging Instrument [Member] | Receive Rate [Member]
Derivatives, Fair Value [Line Items]
Weighted average pay rate	4.32%	3.63%
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional amount		$ 1,492
Weighted average maturity in years		6 years 7 months 24 days
Designated as Hedging Instrument [Member] | Pay Rate [Member]
Derivatives, Fair Value [Line Items]
Weighted average pay rate		5.71%
Designated as Hedging Instrument [Member] | Receive Rate [Member]
Derivatives, Fair Value [Line Items]
Weighted average pay rate		3.54%

Derivative Instruments - Summ64

Derivative Instruments - Summary of Derivative Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Income statement impact of interest rate swaps	$ (2)	$ 4	$ (6)
Designated as Hedging Instrument [Member] | Other Noninterest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Income statement impact of interest rate swaps	$ (2)	4	$ (6)
Other Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives		17		$ 150
Other Assets [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives				45
Other Assets [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives		17		14
Other Payables [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives		17		81
Other Payables [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives				67
Other Payables [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Swap Agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives		$ 17		14
Cash Flow Hedge-Trust Preferred [Member] | Other Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives				$ 91

Fair Value - Estimated Fair Val

Fair Value - Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets:
Cash and cash equivalents	$ 70,278	$ 67,113
Loans, net of deferred fees	1,882,842	1,857,767
Accrued interest receivable	6,502	7,017
Federal Home Loan Bank stock	7,084	5,423
Bank-owned life insurance	35,840	35,165
Financial liabilities:
Deposits	2,098,157	2,148,103
Federal Home Loan Bank borrowings	101,000	65,000
Subordinated debenture	34,167	34,096
Accrued interest payable	672	176
Junior Subordinated Debentures [Member]
Financial liabilities:
Junior subordinated debentures	11,428	11,311
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	70,278	67,113
Securities available-for-sale	453,660	470,996
Loans, net of deferred fees	1,882,842	1,857,767
Accrued interest receivable	6,502	7,017
Federal Home Loan Bank stock	7,084	5,423
Bank-owned life insurance	35,840	35,165
Interest rate swaps	17	150
Financial liabilities:
Deposits	2,098,157	2,148,103
Federal Home Loan Bank borrowings	101,000	65,000
Subordinated debenture	34,167	34,096
Accrued interest payable	672	176
Interest rate swaps	17	81
Carrying Amount [Member] | Junior Subordinated Debentures [Member]
Financial liabilities:
Junior subordinated debentures	11,428	11,311
Fair Value [Member]
Financial assets:
Cash and cash equivalents	70,278	67,113
Securities available-for-sale	453,660	470,996
Loans, net of deferred fees	1,855,447	1,837,673
Accrued interest receivable	6,502	7,017
Federal Home Loan Bank stock	7,084	5,423
Bank-owned life insurance	35,840	35,165
Interest rate swaps	17	150
Financial liabilities:
Deposits	2,097,073	2,147,056
Federal Home Loan Bank borrowings	101,005	65,043
Subordinated debenture	34,167	32,140
Accrued interest payable	672	176
Interest rate swaps	17	81
Fair Value [Member] | Junior Subordinated Debentures [Member]
Financial liabilities:
Junior subordinated debentures	$ 7,610	$ 6,972

Fair Value - Fair Value Hierarc

Fair Value - Fair Value Hierarchy for Assets and Liabilities Not Measured at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets:
Cash and cash equivalents	$ 70,278	$ 67,113
Loans	1,882,842	1,857,767
Accrued interest receivable	6,502	7,017
Federal Home Loan Bank stock	7,084	5,423
Bank-owned life insurance		35,165
Financial liabilities:
Deposits	2,098,157	2,148,103
Federal Home Loan Bank borrowings	101,000	65,000
Accrued interest payable	672	176
Subordinated Debentures [Member]
Financial liabilities:
Debentures	34,167	34,096
Junior Subordinated Debentures [Member]
Financial liabilities:
Debentures	11,428	11,311
Level 1 [Member]
Financial assets:
Cash and cash equivalents	70,278	67,113
Accrued interest receivable	6,502	7,017
Federal Home Loan Bank stock	7,084	5,423
Bank-owned life insurance		35,165
Financial liabilities:
Deposits	1,961,663	1,969,220
Accrued interest payable	672	176
Level 2 [Member]
Financial liabilities:
Deposits	135,410	177,836
Federal Home Loan Bank borrowings	101,005	65,043
Level 2 [Member] | Subordinated Debentures [Member]
Financial liabilities:
Debentures	34,167	32,140
Level 2 [Member] | Junior Subordinated Debentures [Member]
Financial liabilities:
Debentures	7,610	6,972
Level 3 [Member]
Financial assets:
Loans	$ 1,855,447	$ 1,837,673

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured on a recurring basis	$ 453,677	$ 471,146
Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	25,670	25,620
Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	110,474	110,739
Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	278,865	290,036
Private-Label Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,518	1,937
SBA Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	37,133	42,664
Interest Rate Swap Agreement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	17	150
Interest rate swap liabilities measured on a recurring basis	17	81
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured on a recurring basis	17	150
Level 1 [Member] | Interest Rate Swap Agreement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	17	150
Interest rate swap liabilities measured on a recurring basis	17	81
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured on a recurring basis	452,457	469,628
Level 2 [Member] | Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	25,670	25,620
Level 2 [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	110,474	110,739
Level 2 [Member] | Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	278,865	290,036
Level 2 [Member] | Private-Label Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	315	569
Level 2 [Member] | SBA Pools [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	37,133	42,664
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured on a recurring basis	1,203	1,368
Level 3 [Member] | Private-Label Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 1,203	$ 1,368

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfer of security from level 1 to level 2	$ 0	$ 0
Carrying value of loans fully charged off	$ 0
Other Real Estate Owned [Member] | Impaired Loans [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term period for external appraisals	6 months
Other Real Estate Owned [Member] | Impaired Loans [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term period for external appraisals	12 months

Fair Value - Reconciliation of

Fair Value - Reconciliation of Private-Label Mortgage-Backed Securities Measured at Fair Value on Recurring Basis (Detail) - Private-Label Mortgage-Backed Securities [Member] - Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 1,267	$ 1,399	$ 1,368	$ 1,586
Transfers into level 3		70		70
Transfers out of Level 3	0	0	0	0
Included in earnings	(7)	(2)	(9)	(19)
Included in other comprehensive income	13	64	70	45
Paydowns	(70)	(77)	(226)	(228)
Purchases, issuances, sales and settlements
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Ending balance	$ 1,203	$ 1,454	$ 1,203	$ 1,454

Fair Value - Assets Measured at

Fair Value - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment (net of government guarantees and specific reserve)	$ 458
Other real estate owned		$ 10,936
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment (net of government guarantees and specific reserve)	$ 458
Other real estate owned		$ 10,936

Regulatory Matters - Schedule o

Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk weighted assets), Actual Amount	$ 295,048	$ 278,444
Total capital (to risk weighted assets), Actual Ratio	13.56%	12.69%
Tier 1 capital (to risk weighted assets), Actual Amount	$ 237,069	$ 221,346
Tier 1 capital (to risk weighted assets), Actual Ratio	10.90%	10.08%
Common Equity Tier 1 (to risk weighted assets),Actual Amount	$ 223,696	$ 208,873
Common Equity Tier 1 (to risk weighted assets),Actual Ratio	10.28%	9.52%
Tier 1 capital (to leverage assets), Actual Amount	$ 237,069	$ 221,346
Tier 1 capital (to leverage assets), Actual Ratio	9.48%	9.01%
Pacific Continental Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk weighted assets), Actual Amount	$ 291,800	$ 267,416
Total capital (to risk weighted assets), Actual Ratio	13.41%	12.19%
Tier 1 capital (to risk weighted assets), Actual Amount	$ 267,989	$ 244,414
Tier 1 capital (to risk weighted assets), Actual Ratio	12.32%	11.14%
Common Equity Tier 1 (to risk weighted assets),Actual Amount	$ 267,989	$ 244,414
Common Equity Tier 1 (to risk weighted assets),Actual Ratio	12.32%	11.14%
Tier 1 capital (to leverage assets), Actual Amount	$ 267,989	$ 244,414
Tier 1 capital (to leverage assets), Actual Ratio	10.72%	9.96%
Total capital (to risk weighted assets), For Capital Adequacy Purposes Amount	$ 174,002	$ 175,555
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Amount	130,501	131,666
Common Equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Amount	97,876	98,750
Tier 1 capital (to leverage assets), For Capital Adequacy Purposes Amount	$ 100,002	$ 98,181
Total capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets), For Capital Adequacy Purposes Ratio	6.00%	6.00%
Common Equity Tier 1 (to risk weighted assets), For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 capital (to leverage assets), For Capital Adequacy Purposes Ratio	4.00%	4.00%
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 217,502	$ 219,444
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	174,002	175,555
Common Equity Tier 1 (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	141,376	142,638
Tier 1 capital (to leverage assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 108,751	$ 122,726
Total capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%	8.00%
Common Equity Tier 1 (to risk weighted assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier 1 capital (to leverage assets), To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%