TriCo Bancshares (TCBK) 10-Q 8 Nov 19 2019 Q3 Quarterly report Financial data

Cover Page Document

Cover Page Document - shares	9 Months Ended
	Sep. 30, 2019	Nov. 04, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	000-10661
Entity Registrant Name	TriCo Bancshares
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	94-2792841
Entity Address, Address Line One	63 Constitution Drive
Entity Address, City or Town	Chico
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95973
City Area Code	530
Local Phone Number	898-0300
Title of 12(b) Security	Common Stock
Trading Symbol	TCBK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		30,520,725
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000356171
Current Fiscal Year End Date	--12-31

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets:
Cash and due from banks	$ 118,960	$ 119,781
Cash at Federal Reserve and other banks	140,087	107,752
Cash and cash equivalents	259,047	227,533
Investment securities:
Marketable equity securities	2,974	2,874
Available for sale debt securities	984,080	1,115,036
Held to maturity debt securities	393,449	444,936
Restricted equity securities	17,250	17,250
Loans held for sale	7,604	3,687
Loans	4,182,348	4,022,014
Allowance for loan losses	(31,537)	(32,582)
Total loans, net	4,150,811	3,989,432
Premises and equipment, net	87,424	89,347
Cash value of life insurance	117,088	117,318
Accrued interest receivable	18,205	19,412
Goodwill	220,872	220,972
Other intangible assets, net	24,988	29,280
Operating leases, right-of-use	28,957
Other assets	72,134	75,364
Total assets	6,384,883	6,352,441
Deposits:
Noninterest-bearing demand	1,777,357	1,760,580
Interest-bearing	3,518,050	3,605,886
Total deposits	5,295,407	5,366,466
Accrued interest payable	2,847	1,997
Operating lease liability	28,494
Other liabilities	87,867	83,724
Other borrowings	16,423	15,839
Junior subordinated debt	57,180	57,042
Total liabilities	5,488,218	5,525,068
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, no par value: 1,000,000 shares authorized, zero issued and outstanding at September 30, 2019 and December 31, 2018	0	0
Common stock, no par value: 50,000,000 shares authorized; 30,512,187 and 30,417,223 issued and outstanding at September 30, 2019 and December 31, 2018, respectively	543,415	541,762
Retained earnings	351,751	303,490
Accumulated other comprehensive income (loss), net of tax	1,499	(17,879)
Total shareholders’ equity	896,665	827,373
Total liabilities and shareholders’ equity	$ 6,384,883	$ 6,352,441
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	30,512,187	30,417,223
Common Stock, Shares, Outstanding (in shares)	30,512,187	30,417,223

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Interest and dividend income:
Loans, including fees	$ 56,999	$ 53,102	$ 166,888	$ 130,455
Investments:
Taxable securities	9,864	9,189	30,876	23,949
Tax exempt securities	961	1,189	3,095	3,272
Dividends	308	459	973	1,093
Interest bearing cash at Federal Reserve and other banks	757	615	2,694	1,384
Total interest and dividend income	68,889	64,554	204,526	160,153
Interest expense:
Deposits	3,050	2,072	8,768	4,402
Other borrowings	334	1,178	384	2,106
Junior subordinated debt	817	815	2,501	2,301
Total interest expense	4,201	4,065	11,653	8,809
Net interest income	64,688	60,489	192,873	151,344
Provision for (benefit from reversal of) loan losses	(329)	2,651	(1,392)	1,777
Net interest income after provision for (benefit from reversal of) loan losses	65,017	57,838	194,265	149,567
Non-interest income:
Service charges and fees	10,590	9,743	29,788	28,327
Gain on sale of loans	1,236	539	2,223	1,831
Gain on sale of investment securities	107	207	107	207
Asset management and commission income	721	728	2,102	2,414
Increase in cash value of life insurance	773	732	2,294	1,996
Other	681	387	2,820	1,691
Total non-interest income	14,108	12,336	39,334	36,466
Non-interest expense:
Salaries and related benefits	26,899	25,823	78,746	68,928
Other	19,445	21,705	59,747	54,298
Total non-interest expense	46,344	47,528	138,493	123,226
Income before provision for income taxes	32,781	22,646	95,106	62,807
Provision for income taxes	9,386	6,476	25,924	17,698
Net income	$ 23,395	$ 16,170	$ 69,182	$ 45,109
Earnings per share:
Earnings Per Share, Basic (in USD per share)	$ 0.77	$ 0.54	$ 2.27	$ 1.78
Earnings Per Share, Diluted (in USD per share)	$ 0.76	$ 0.53	$ 2.25	$ 1.76

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 23,395	$ 16,170	$ 69,182	$ 45,109
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available for sale securities arising during the period	3,697	(5,917)	19,378	(20,941)
Change in minimum pension liability	0	81	0	241
Other comprehensive income (loss)	3,697	(5,836)	19,378	(20,700)
Comprehensive income	$ 27,092	$ 10,334	$ 88,560	$ 24,409

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at June 30, 2019 at Dec. 31, 2017	$ 505,808	$ 255,836	$ 255,200	$ (5,228)
Balance at June 30, 2019 (in shares) at Dec. 31, 2017		22,955,963
Net Income (Loss) Attributable to Parent	45,109		45,109
Adoption ASU | ASU 2016-01			(62)	62
Adoption ASU | ASU 2018-02			1,093	(1,093)
Other comprehensive income (loss)	(20,700)			(20,700)
Stock option vesting	75	$ 75
Stock options exercised	475	$ 475
Stock options exercised (in shares)		27,400
RSU vesting	1,019	$ 1,019
PSU vesting	0	$ 0
RSUs released (in shares)		58,028
PSUs released (in shares)		0
Repurchase of common stock	(1,124)	$ (323)	(801)
Repurchase of common stock (in shares)		(28,850)
Dividends paid	(12,984)		(12,984)
Balance at September 30, 2019 at Sep. 30, 2018	802,115	$ 541,519	$ 287,555	(26,959)
Balance at September 30, 2019 (in shares) at Sep. 30, 2018		30,417,818
Common Stock, Dividends, Per Share, Cash Paid			$ 0.51
Balance at June 30, 2019 at Jun. 30, 2018	512,344	$ 256,590	$ 276,877	(21,123)
Balance at June 30, 2019 (in shares) at Jun. 30, 2018		23,004,153
Net Income (Loss) Attributable to Parent	16,170		16,170
Other comprehensive income (loss)	(5,836)			(5,836)
Stock option vesting	21	$ 21
Stock options exercised	252	$ 252
Stock options exercised (in shares)		12,900
RSU vesting	274	$ 274
PSU vesting	77	$ 77
RSUs released (in shares)		7,118
PSUs released (in shares)		0
Issuance of common stock (in shares)		7,405,277
Issuance of common stock	284,437	$ 284,437
Repurchase of common stock	(453)	$ (132)	(321)
Repurchase of common stock (in shares)		(11,630)
Dividends paid	(5,171)		(5,171)
Balance at September 30, 2019 at Sep. 30, 2018	802,115	$ 541,519	$ 287,555	(26,959)
Balance at September 30, 2019 (in shares) at Sep. 30, 2018		30,417,818
Common Stock, Dividends, Per Share, Cash Paid			$ 0.17
Balance at June 30, 2019 at Dec. 31, 2018	$ 827,373	$ 541,762	$ 303,490	(17,879)
Balance at June 30, 2019 (in shares) at Dec. 31, 2018	30,417,223	30,417,223
Net Income (Loss) Attributable to Parent	$ 69,182		69,182
Other comprehensive income (loss)	19,378			19,378
Stock option vesting	0
Stock options exercised	$ 2,646	$ 2,646
Stock options exercised (in shares)	166,000	166,000
RSU vesting	$ 863	$ 863
PSU vesting	350	$ 350
RSUs released (in shares)		30,461
RSUs released	0
PSUs released (in shares)		22,237
PSUs released	0
Repurchase of common stock	(4,842)	$ (2,206)	(2,636)
Repurchase of common stock (in shares)		(123,734)
Dividends paid	(18,285)		(18,285)
Balance at September 30, 2019 at Sep. 30, 2019	$ 896,665	$ 543,415	$ 351,751	1,499
Balance at September 30, 2019 (in shares) at Sep. 30, 2019	30,512,187	30,512,187
Common Stock, Dividends, Per Share, Cash Paid			$ 0.60
Balance at June 30, 2019 at Jun. 30, 2019	$ 875,886	$ 542,939	$ 335,145	(2,198)
Balance at June 30, 2019 (in shares) at Jun. 30, 2019		30,502,757
Net Income (Loss) Attributable to Parent	23,395		23,395
Other comprehensive income (loss)	3,697			3,697
Stock option vesting	0
Stock options exercised	146	$ 146
Stock options exercised (in shares)		9,000
RSU vesting	296	$ 296
PSU vesting	102	$ 102
RSUs released (in shares)		4,250
RSUs released	0
PSUs released (in shares)		0
PSUs released	0
Repurchase of common stock	(147)	$ (68)	(79)
Repurchase of common stock (in shares)		(3,820)
Dividends paid	(6,710)		(6,710)
Balance at September 30, 2019 at Sep. 30, 2019	$ 896,665	$ 543,415	$ 351,751	$ 1,499
Balance at September 30, 2019 (in shares) at Sep. 30, 2019	30,512,187	30,512,187
Common Stock, Dividends, Per Share, Cash Paid			$ 0.22

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Retained Earnings
Dividends paid, per share	$ 0.22	$ 0.17	$ 0.60	$ 0.51

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 69,182	$ 45,109
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	5,273	4,914
Amortization of intangible assets	4,293	2,068
(Reversal of) provision for loan losses	(1,392)	1,777
Amortization of investment securities premium, net	2,050	1,953
Gain on sale of investment securities	(107)	(207)
Originations of loans for resale	(92,002)	(63,912)
Proceeds from sale of loans originated for resale	89,506	66,138
Gain on sale of loans	(2,223)	(1,831)
Change in market value of mortgage servicing rights	1,652	(38)
Provision for losses on foreclosed assets	56	89
Gain on transfer of loans to foreclosed assets	(151)	0
Loss Gain On Sale Of Foreclosed Assets	(246)	(390)
Loss on disposal of fixed assets	82	206
Increase in cash value of life insurance	(2,294)	(1,996)
Gain on life insurance death benefit	(831)	0
(Gain) loss on marketable equity securities	(100)	92
Equity compensation vesting expense	1,213	1,094
Change in:
Interest receivable	1,207	(5,820)
Interest payable	850	799
Amortization of operating lease ROUA	(463)
Other assets and liabilities, net	711	9,860
Net cash from operating activities	76,266	59,905
Investing activities:
Cash acquired in acquisition, net of consideration paid	0	30,613
Proceeds from maturities of securities available for sale	69,278	54,510
Proceeds from maturities of securities held to maturity	50,738	54,203
Proceeds from sale of available for sale securities	125,247	293,279
Purchases of securities available for sale	(37,253)	(370,843)
Net redemption of restricted equity securities	0	7,429
Loan origination and principal collections, net	(159,991)	(178,596)
Proceeds from sale of other real estate owned	1,255	2,206
Proceeds from sale of premises and equipment	0	62
Purchases of premises and equipment	(3,070)	(5,736)
Net cash from (used by) investing activities	46,204	(112,873)
Financing activities:
Net change in deposits	(71,059)	92,051
Net change in other borrowings	584	(4,335)
Repurchase of common stock	(2,196)	(834)
Dividends paid	(18,285)	(12,984)
Exercise of stock options	0	185
Net cash used by (from) financing activities	(90,956)	74,083
Net change in cash and cash equivalents	31,514	21,115
Cash and cash equivalents, beginning of period	227,533	205,428
Cash and cash equivalents, end of period	259,047	226,543
Supplemental disclosure of noncash activities:
Unrealized gain (loss) on securities available for sale	27,511	(29,704)
Loans transferred to foreclosed assets	331	511
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	4,842	1,124
Obligations incurred in conjunction with leased assets	156	0
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	10,803	8,010
Cash paid for income taxes	$ 25,950	11,625
Assets acquired in acquisition		1,456,505
Liabilities assumed in acquisition		$ 1,172,068

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1 -Summary of Significant Accounting Policies Description of Business and Basis of Presentation TriCo Bancshares (the “Company” or “we”) is a California corporation organized to act as a bank holding company for Tri Counties Bank (the “Bank”). The Company and the Bank are headquartered in Chico, California. The Bank is a California-chartered bank that is engaged in the general commercial banking business in 29 California counties. The Company has five capital subsidiary business trusts (collectively, the “Capital Trusts”) that issued trust preferred securities, including two organized by the Company and three acquired with the acquisition of North Valley Bancorp. The consolidated financial statements are prepared in accordance with accounting policies generally accepted in the United States of America and general practices in the banking industry. All adjustments necessary for a fair presentation of these consolidated financial statements have been included and are of a normal and recurring nature. The financial statements include the accounts of the Company. All inter-company accounts and transactions have been eliminated in consolidation. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,717,000 are accounted for under the equity method and, accordingly, are not consolidated and are included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the Capital Trusts are reflected as debt on the Company’s consolidated balance sheet. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (the “2018 Annual Report”). The Company believes that the disclosures made are adequate to make the information not misleading. Segment and Significant Group Concentration of Credit Risk The Company grants agribusiness, commercial, consumer, and residential loans to customers located throughout northern and central California. The Company has a diversified loan portfolio within the business segments located in this geographical area. The Company currently classifies all its operation into one business segment that it denotes as community banking. Geographical Descriptions For the purpose of describing the geographical location of the Company’s operations, the Company has defined northern California as that area of California north of, and including, Stockton to the east and San Jose to the west; central California as that area of the state south of Stockton and San Jose, to and including, Bakersfield to the east and San Luis Obispo to the west; and southern California as that area of the state south of Bakersfield and San Luis Obispo. Reclassification Some items in the prior year consolidated financial statements were reclassified to conform to the current presentation. Reclassifications had no effect on prior year net income or shareholders’ equity. Cash and Cash Equivalents Net cash flows are reported for loan and deposit transactions and other borrowings. For purposes of the consolidated statement of cash flows, cash, due from banks with original maturities less than 90 days, interest-earning deposits in other banks, and Federal funds sold are considered to be cash equivalents. Accounting Standards Adopted in 2019 The Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-2, Leases (Topic 842) . ASU 2016-2, which among other things, requires lessees to recognize most leases on-balance sheet, increasing reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. The FASB has issued incremental guidance to Topic 842 standard through ASU No. 2018-11, 2018-20, and 2019-1. The Company has elected to use the transition relief approach as provided in ASU 2018-11, which permits the Company to use January 1, 2019 as both the application date and the adoption date, rather than the modified retrospective approach which would have required an application date of January 1, 2017 and adoption date of January 1, 2019. The Company also elected certain relief options offered within the new standard, which include the package of practical expedients, the option not to recognize a right-of-use asset (ROUA) and lease liability that arise from short-term leases (i.e. leases with terms of 12 months or less), and the option of hindsight when determining lease term. Substantially all of the Company’s lease agreements are considered operating leases and were not previously recognized on the Company’s balance sheets. As of January 1, 2019, the Company recorded a ROUA and corresponding lease liability for all applicable operating leases. While the guidance increased the Company’s gross assets and liabilities, the adoption of ASU 2016-2 did not have a material impact on the consolidated statements of income or the consolidated statements of cash flows. See Note 6 for more information. Accounting Standards Pending Adoption The FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326) . ASU 2016-13 is the final guidance on the new current expected credit loss (‘‘CECL’’) model. ASU 2016-13, among other things, requires the incurred loss impairment methodology in current GAAP be replaced with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to estimate future credit loss estimates. As CECL encompasses all financial assets carried at amortized cost, the requirement that reserves be established based on an organization’s reasonable and supportable estimate of expected credit losses extends to held to maturity (‘‘HTM’’) debt securities. ASU 2016-13 amends the accounting for credit losses on available-for-sale securities (‘‘AFS’’), whereby credit losses will be presented as an allowance as opposed to a write- down. In addition, CECL will modify the accounting for purchased loans with credit deterioration since origination, so that reserves are established at the date of acquisition for purchased loans. Lastly, ASU 2016-13 requires enhanced disclosures on the significant estimates and judgments used to estimate credit losses, as well as on the credit quality and underwriting standards of an organization’s portfolio. These disclosures require organizations to present the currently required credit quality disclosures disaggregated by the year of origination or vintage. ASU 2016-13 allows for a modified retrospective approach with a cumulative effect adjustment to the balance sheet upon adoption (charge to retained earnings instead of the income statement). ASU 2016-13 will be effective for the Company on January 1, 2020, and early adoption is permitted. While the Company is currently evaluating the provisions of ASU 2016-13 to determine the potential impact the new standard will have on the Company’s consolidated financial statements, it has taken steps to prepare for the implementation when it becomes effective, such as forming an internal task force, gathering pertinent data, consulting with outside professionals, and evaluating its current IT systems. While detailed modeling efforts are ongoing, the validation of expected credit loss estimates will likely not be available until late in 2019. Management expects to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the first reporting period in which the new standard is effective, but cannot yet estimate the magnitude of the one- time adjustment or the overall impact of the new guidance on the Company’s financial position, results of operations or cash flows. FASB issued ASU No. 2017-4, Intangibles-Goodwill and Other: Simplifying the Test for Goodwill Impairment (Topic 350): ASU 2017-4 eliminates step two of the goodwill impairment test (the hypothetical purchase price allocation used to determine the implied fair value of goodwill) when step one (determining if the carrying value of a reporting unit exceeds its fair value) is failed. Instead, entities simply will compare the fair value of a reporting unit to its carrying amount and record goodwill impairment for the amount by which the reporting unit’s carrying amount exceeds its fair value. ASU 2017-4 will be effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. As ASU No. 2018-13 only revises disclosure requirements, it will not have a significant impact on the Company’s consolidated financial statements.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Business Combinations	Note 2 - Business Combinations Merger with FNB Bancorp On July 6, 2018, the Company completed the acquisition of FNB Bancorp (“FNBB”) for an aggregate transaction value of $291,132,000. FNBB was merged into the Company, and the Company issued 7,405,277 shares of common stock to the former shareholders of FNBB. FNBB’s subsidiary, First National Bank of Northern California, merged into the Bank on the same day. The Company also paid $6.7 million to settle and retire all FNBB stock options outstanding as of the acquisition date. Upon the consummation of the merger, the Company added 12 branches within San Mateo, San Francisco, and Santa Clara counties. In accordance with accounting for business combinations, the Company recorded $156,661,000 of goodwill and $27,605,000 of core deposit intangibles on the acquisition date. Subsequently, the Company revised its estimate of other liabilities acquired in connection with the business combination and reduced the amount of goodwill by $100,000 to $156,561,000. The core deposit intangibles will be amortized over the weighted average remaining life of 6.2 years with no significant residual value. For tax purposes, purchase price accounting adjustments including goodwill are all non-taxable and /or non-deductible. Acquisition related costs of $601,000 and $1,077,000 are included in the consolidated statements of income for the three and nine months ended September 30, 2018. There have been no acquisition costs incurred during the nine months ended September 30, 2019. The acquisition was consistent with the Company’s strategy to expand into the Bay Area market. The acquisition offers the Company the opportunity to increase profitability by introducing existing products and services to the acquired customer base as well as add new customers in the expanded region. Goodwill arising from the acquisition consisted largely of the estimated cost savings resulting from the combined operations. The following table summarizes the consideration paid for FNBB and the amounts of assets acquired and liabilities assumed that were recorded at the acquisition date (in thousands). FNB Bancorp Fair value of consideration transferred: Fair value of shares issued $ 284,437 Cash consideration 6,695 Total fair value of consideration transferred 291,132 Assets acquired: Cash and cash equivalents 37,308 Securities available for sale 335,667 Restricted equity securities 7,723 Loans 834,683 Premises and equipment 30,522 Cash value of life insurance 16,817 Core deposit intangible 27,605 Other assets 16,214 Total assets acquired 1,306,539 Liabilities assumed: Deposits 991,935 Other liabilities 15,033 Short-term borrowings - Federal Home Loan Bank 165,000 Total liabilities assumed 1,171,968 Total net assets acquired 134,571 Goodwill recognized $ 156,561 A summary of the estimated fair value adjustments resulting in the goodwill recorded in the FNB Bancorp acquisition are presented below (in thousands): FNB Bancorp Value of stock consideration paid to FNB Bancorp Shareholders $ 284,437 Cash consideration 6,695 Less: Cost basis net assets acquired 114,030 Fair value adjustments: Investments (1,081) Loans (22,390) Premises and equipment 21,590 Core deposit intangible 27,327 Deferred income taxes (6,394) Other 1,489 Goodwill $ 156,561 The fair value of net assets acquired includes fair value adjustments to certain loans that were not considered impaired (PNCI loans) as of the acquisition date. The fair value adjustments were determined using discounted contractual cash flows. As such, these loans were not considered impaired at the acquisition date and were not subject to the guidance relating to purchased credit impaired loans (PCI loans), which have shown evidence of credit deterioration since origination. The gross contractual amounts receivable and fair value for PNCI loans as of the acquisition date was $866,189,000 and $833,381,000, respectively. The gross contractual amounts receivable and fair value for PCI loans as of the acquisition date was $1,683,000 and $1,302,000, respectively. At the acquisition date, the Company was unable to estimate the expected contractual cash flows to be collected from the purchased credit impaired loans.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2019
Investments Schedule [Abstract]
Investment Securities	Note 3 - Investment Securities The amortized cost and estimated fair values of investments in debt securities are summarized in the following tables: September 30, 2019 Amortized Gross Gross Estimated (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 488,080 $ 8,004 $ (447) $ 495,637 Obligations of states and political subdivisions 108,360 3,550 — 111,910 Corporate bonds 4,420 108 — 4,528 Asset backed securities 376,683 192 (4,870) 372,005 Total debt securities available for sale $ 977,543 $ 11,854 $ (5,317) $ 984,080 Debt Securities Held to Maturity Obligations of U.S. government agencies $ 379,634 $ 6,382 $ (482) $ 385,534 Obligations of states and political subdivisions 13,815 350 — 14,165 Total debt securities held to maturity $ 393,449 $ 6,732 $ (482) $ 399,699 December 31, 2018 Amortized Gross Gross Estimated (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 647,288 $ 771 $ (18,078) $ 629,981 Obligations of states and political subdivisions 128,890 294 (3,112) 126,072 Corporate bonds 4,381 97 — 4,478 Asset backed securities 355,451 73 (1,019) 354,505 Total debt securities available for sale $ 1,136,010 $ 1,235 $ (22,209) $ 1,115,036 Debt Securities Held to Maturity Obligations of U.S. government agencies 430,343 327 (7,745) 422,925 Obligations of states and political subdivisions 14,593 82 (230) 14,445 Total debt securities held to maturity $ 444,936 $ 409 $ (7,975) $ 437,370 Proceeds from the sales of investment securities totaled $125,247,000 and $293,279,000 during the nine months ended September 30, 2019 and 2018, respectively. Gross realized gains from the sale of investment securities totaled $335,000 and $207,000 during the three and nine months ended September 30, 2019 and 2018, respectively. Gross realized losses from the sale of investment securities totaled $228,000 during the three and nine months ended September 30, 2019. There were no realized losses from the sale of investment securities during the three and nine months ended September 30, 2018. Investment securities with an aggregate carrying value of $504,475,000 and $597,591,000 at September 30, 2019 and December 31, 2018, respectively, were pledged as collateral for specific borrowings, lines of credit or local agency deposits. The amortized cost and estimated fair value of debt securities at September 30, 2019 by contractual maturity are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. At September 30, 2019, obligations of U.S. government corporations and agencies with a cost basis totaling $867,714,000 consist almost entirely of residential real estate mortgage-backed securities whose contractual maturity, or principal repayment, will follow the repayment of the underlying mortgages. For purposes of the following table, the entire outstanding balance of these mortgage-backed securities issued by U.S. government corporations and agencies is categorized based on final maturity date. At September 30, 2019, the Company estimates the average remaining life of these mortgage-backed securities issued by U.S. government corporations and agencies to be approximately 4.7 years. Average remaining life is defined as the time span after which the principal balance has been reduced by half. Debt Securities Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Due in one year $ 2,607 $ 2,613 $ 1,263 $ 1,274 Due after one year through five years 14,986 15,401 — — Due after five years through ten years 46,263 47,273 20,747 21,035 Due after ten years 913,687 918,793 371,439 377,390 Totals $ 977,543 $ 984,080 $ 393,449 $ 399,699 Gross unrealized losses on debt securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: Less than 12 months 12 months or more Total September 30, 2019: Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 38,295 $ (374) $ 25,171 $ (73) $ 63,466 $ (447) Asset backed securities 293,500 (4,432) 45,981 (438) 339,481 (4,870) Total debt securities available for sale $ 331,795 $ (4,806) $ 71,152 $ (511) $ 402,947 $ (5,317) Debt Securities Held to Maturity Obligations of U.S. government agencies $ 19,749 $ (94) $ 78,604 $ (388) $ 98,353 $ (482) Less than 12 months 12 months or more Total December 31, 2018: Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 171,309 $ (3,588) $ 394,630 $ (14,490) $ 565,939 $ (18,078) Obligations of states and political subdivisions 63,738 (1,541) 20,719 (1,571) 84,457 (3,112) Asset backed securities 101,386 (1,019) — — 101,386 (1,019) Total debt securities available for sale $ 336,433 $ (6,148) $ 415,349 $ (16,061) $ 751,782 $ (22,209) Debt Securities Held to Maturity Obligations of U.S. government agencies 223,810 (2,619) 158,648 (5,126) 382,458 (7,745) Obligations of states and political subdivisions 5,786 (114) 4,042 (116) 9,828 (230) Total debt securities held to maturity $ 229,596 $ (2,733) $ 162,690 $ (5,242) $ 392,286 $ (7,975) Obligations of U.S. government agencies: Unrealized losses on investments in obligations of U.S. government agencies are caused by interest rate increases. The contractual cash flows of these securities are guaranteed by U.S. Government Sponsored Entities (principally Fannie Mae and Freddie Mac). It is expected that the securities would not be settled at a price less than the amortized cost of the investment. Because the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell and more likely than not will not be required to sell, these investments are not considered other-than-temporarily impaired. At September 30, 2019, 19 debt securities representing obligations of U.S. government agencies had unrealized losses with aggregate depreciation of 0.59% from the Company’s amortized cost basis. Asset backed securities: The unrealized losses on investments in asset backed securities were caused by increases in required yields by investors in these types of securities. At the time of purchase, each of these securities was rated AA or AAA and through September 30, 2019 has not experienced any deterioration in credit rating. The Company continues to monitor these securities for changes in credit rating or other indications of credit deterioration. Because management believes the decline in fair value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell and more likely than not will not be required to sell, these investments are not considered other-than-temporarily impaired. At September 30, 2019, 25 asset backed securities had unrealized losses with aggregate depreciation of 1.49% from the Company’s amortized cost basis.

Loans

Loans	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loans	Note 4 – Loans A summary of loan balances follows: September 30, 2019 (in thousands) Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 family $ 355,646 $ 148,731 $ 1,417 $ 505,794 Commercial 2,109,309 626,924 5,129 2,741,362 Total mortgage loans on real estate 2,464,955 775,655 6,546 3,247,156 Consumer: Home equity lines of credit 294,411 36,635 826 331,872 Home equity loans 27,034 2,915 421 30,370 Other 64,153 16,142 2 80,297 Total consumer loans 385,598 55,692 1,249 442,539 Commercial 256,379 19,569 2,510 278,458 Construction: Residential 158,907 10,127 — 169,034 Commercial 44,704 457 — 45,161 Total construction loans 203,611 10,584 — 214,195 Total loans, net of deferred loan fees and discounts $ 3,310,543 $ 861,500 $ 10,305 $ 4,182,348 Total principal balance of loans owed, net of charge-offs $ 3,319,052 $ 892,608 $ 16,274 $ 4,227,934 Unamortized net deferred loan fees (8,509) — — (8,509) Discounts to principal balance of loans owed, net of charge-offs — (31,108) (5,969) (37,077) Total loans, net of unamortized deferred loan fees and discounts $ 3,310,543 $ 861,500 $ 10,305 $ 4,182,348 Allowance for loan losses $ (31,112) $ (419) $ (6) $ (31,537) December 31, 2018 (in thousands) Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 family $ 343,796 $ 169,792 $ 1,674 $ 515,262 Commercial 1,910,981 708,401 8,456 2,627,838 Total mortgage loans on real estate 2,254,777 878,193 10,130 3,143,100 Consumer: Home equity lines of credit 284,453 40,957 1,167 326,577 Home equity loans 32,660 3,585 439 36,684 Other 34,020 21,659 42 55,721 Total consumer loans 351,133 66,201 1,648 418,982 Commercial 228,635 45,468 2,445 276,548 Construction: Residential 90,703 30,593 — 121,296 Commercial 56,208 5,880 — 62,088 Total construction loans 146,911 36,473 — 183,384 Total loans, net of deferred loan fees and discounts $ 2,981,456 $ 1,026,335 $ 14,223 $ 4,022,014 Total principal balance of loans owed, net of charge-offs $ 2,991,324 $ 1,062,655 $ 21,265 $ 4,075,244 Unamortized net deferred loan fees (9,868) — — (9,868) Discounts to principal balance of loans owed, net of charge-offs — (36,320) (7,042) (43,362) Total loans, net of unamortized deferred loan fees and discounts $ 2,981,456 $ 1,026,335 $ 14,223 $ 4,022,014 Allowance for loan losses $ (31,793) $ (667) $ (122) $ (32,582) The following is a summary of the change in accretable yield for PCI during the periods indicated (in thousands): Three months ended September 30, Nine months ended September 30, 2019 2018 2019 2018 Change in accretable yield: Balance at beginning of period $ 5,318 $ 5,871 $ 6,059 $ 6,137 Accretion to interest income (292) (253) (702) (769) Reclassification from (to) nonaccretable difference 71 (47) (260) 203 Balance at end of period $ 5,097 $ 5,571 $ 5,097 $ 5,571

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
Allowance For Loan And Lease Losses [Abstract]
Allowance for Loan Losses	Note 5 – Allowance for Loan Losses The following tables summarize the activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated. Allowance for Loan Losses – Three Months Ended September 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,576 $ — $ 48 $ (218) $ 2,406 Commercial 12,099 (746) 126 462 11,941 Total mortgage loans on real estate 14,675 (746) 174 244 14,347 Consumer: Home equity lines of credit 5,859 — 27 (152) 5,734 Home equity loans 1,242 (3) 156 (133) 1,262 Other 1,451 (188) 79 211 1,553 Total consumer loans 8,552 (191) 262 (74) 8,549 Commercial 6,745 (585) 84 (557) 5,687 Construction: Residential 2,538 — — 119 2,657 Commercial 358 — — (61) 297 Total construction loans 2,896 — — 58 2,954 Total $ 32,868 $ (1,522) $ 520 $ (329) $ 31,537 Allowance for Loan Losses – Nine months ended September 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,676 $ (2) $ 53 $ (321) $ 2,406 Commercial 12,944 (746) 1,517 (1,774) 11,941 Total mortgage loans on real estate 15,620 (748) 1,570 (2,095) 14,347 Consumer: Home equity lines of credit 6,042 — 305 (613) 5,734 Home equity loans 1,540 (3) 414 (689) 1,262 Other 793 (548) 262 1,046 1,553 Total consumer loans 8,375 (551) 981 (256) 8,549 Commercial 6,090 (1,242) 337 502 5,687 Construction: Residential 1,834 — — 823 2,657 Commercial 663 — — (366) 297 Total construction loans 2,497 — — 457 2,954 Total $ 32,582 $ (2,541) $ 2,888 $ (1,392) $ 31,537 Allowance for Loan Losses – As of September 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 family $ 2,315 $ 91 $ — $ 2,406 Commercial 11,915 26 — 11,941 Total mortgage loans on real estate 14,230 117 — 14,347 Consumer: Home equity lines of credit 5,644 84 6 5,734 Home equity loans 1,216 46 — 1,262 Other 1,535 18 — 1,553 Total consumer loans 8,395 148 6 8,549 Commercial 4,428 1,259 — 5,687 Construction: Residential 2,657 — — 2,657 Commercial 297 — — 297 Total construction loans 2,954 — — 2,954 Total $ 30,007 $ 1,524 $ 6 $ 31,537 Loans, Net of Unearned fees – As of September 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 family $ 499,620 $ 4,757 $ 1,417 $ 505,794 Commercial 2,727,228 9,005 5,129 2,741,362 Total mortgage loans on real estate 3,226,848 13,762 6,546 3,247,156 Consumer: Home equity lines of credit 329,129 1,917 826 331,872 Home equity loans 27,793 2,156 421 30,370 Other 80,146 149 2 80,297 Total consumer loans 437,068 4,222 1,249 442,539 Commercial 271,447 4,501 2,510 278,458 Construction: Residential 169,034 — — 169,034 Commercial 45,161 — — 45,161 Total construction loans 214,195 — — 214,195 Total $ 4,149,558 $ 22,485 $ 10,305 $ 4,182,348 Allowance for Loan Loses – Year Ended December 31, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,317 $ (77) $ — $ 436 $ 2,676 Commercial 11,441 (15) 68 1,450 12,944 Total mortgage loans on real estate 13,758 (92) 68 1,886 15,620 Consumer: Home equity lines of credit 5,800 (277) 846 (327) 6,042 Home equity loans 1,841 (24) 297 (574) 1,540 Other 586 (783) 288 702 793 Total consumer loans 8,227 (1,084) 1,431 (199) 8,375 Commercial 6,512 (1,188) 541 225 6,090 Construction: Residential 1,184 — — 650 1,834 Commercial 642 — — 21 663 Total construction loans 1,826 — — 671 2,497 Total $ 30,323 $ (2,364) $ 2,040 $ 2,583 $ 32,582 Allowance for Loan Losses – As of December 31, 2018 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 family $ 2,620 $ 56 $ — $ 2,676 Commercial 12,737 91 116 12,944 Total mortgage loans on real estate 15,357 147 116 15,620 Consumer: Home equity lines of credit 5,838 198 6 6,042 Home equity loans 1,486 54 — 1,540 Other 779 14 — 793 Total consumer loans 8,103 266 6 8,375 Commercial 4,309 1,781 — 6,090 Construction: Residential 1,834 — — 1,834 Commercial 663 — — 663 Total construction loans 2,497 — — 2,497 Total $ 30,266 $ 2,194 $ 122 $ 32,582 Loans , Net of Unearned fees - As of December 31, 2018 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 family $ 509,267 $ 4,321 $ 1,674 $ 515,262 Commercial 2,606,819 12,563 8,456 2,627,838 Total mortgage loans on real estate 3,116,086 16,884 10,130 3,143,100 Consumer: Home equity lines of credit 322,764 2,646 1,167 326,577 Home equity loans 33,142 3,103 439 36,684 Other 55,483 196 42 55,721 Total consumer loans 411,389 5,945 1,648 418,982 Commercial 268,885 5,218 2,445 276,548 Construction: Residential 121,296 — — 121,296 Commercial 62,088 — — 62,088 Total construction loans 183,384 — — 183,384 Total $ 3,979,744 $ 28,047 $ 14,223 $ 4,022,014 Allowance for Loan Losses – Three Months Ended September 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 1,991 $ (25) $ — $ 434 $ 2,400 Commercial 11,607 — 15 1,257 12,879 Total mortgage loans on real estate 13,598 (25) 15 1,691 15,279 Consumer: Home equity lines of credit 5,048 (172) 151 194 5,221 Home equity loans 1,532 (23) 139 (55) 1,593 Other 557 (229) 63 309 700 Total consumer loans 7,137 (424) 353 448 7,514 Commercial 6,378 (693) 202 337 6,224 Construction: Residential 1,434 — — 192 1,626 Commercial 977 — — (17) 960 Total construction loans 2,411 — — 175 2,586 Total $ 29,524 $ (1,142) $ 570 $ 2,651 $ 31,603 Allowance for Loan Losses – Nine months ended September 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,317 $ (77) $ — $ 160 $ 2,400 Commercial 11,441 (15) 51 1,402 12,879 Total mortgage loans on real estate 13,758 (92) 51 1,562 15,279 Consumer: Home equity lines of credit 5,800 (276) 677 (980) 5,221 Home equity loans 1,841 (23) 176 (401) 1,593 Other 586 (597) 208 503 700 Total consumer loans 8,227 (896) 1,061 (878) 7,514 Commercial 6,512 (952) 331 333 6,224 Construction: Residential 1,184 — — 442 1,626 Commercial 642 — — 318 960 Total construction loans 1,826 — — 760 2,586 Total $ 30,323 $ (1,940) $ 1,443 $ 1,777 $ 31,603 Allowance for Loan Losses – As of September 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 family $ 2,313 $ 57 $ 30 $ 2,400 Commercial 12,552 268 59 12,879 Total mortgage loans on real estate 14,865 325 89 15,279 Consumer: Home equity lines of credit 5,046 168 7 5,221 Home equity loans 1,418 175 — 1,593 Other 597 103 — 700 Total consumer loans 7,061 446 7 7,514 Commercial 4,353 1,857 14 6,224 Construction: Residential 1,626 — — 1,626 Commercial 960 — — 960 Total construction loans 2,586 — — 2,586 Total $ 28,865 $ 2,628 $ 110 $ 31,603 Loans, Net of Unearned fees – As of September 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 family $ 517,935 $ 4,781 $ 1,698 $ 524,414 Commercial 2,586,659 13,244 7,885 2,607,788 Total mortgage loans on real estate 3,104,594 18,025 9,583 3,132,202 Consumer: Home equity lines of credit 327,649 2,188 1,299 331,136 Home equity loans 37,840 2,406 447 40,693 Other 49,171 243 42 49,456 Total consumer loans 414,660 4,837 1,788 421,285 Commercial 282,588 4,632 2,427 289,647 Construction: Residential 114,574 — — 114,574 Commercial 69,728 — — 69,728 Total construction loans 184,302 — — 184,302 Total $ 3,986,144 $ 27,494 $ 13,798 $ 4,027,436 As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including, but not limited to, trends relating to (i) the level of criticized and classified loans, (ii) net charge-offs, (iii) non-performing loans, and (iv) delinquency within the portfolio. The Company utilizes a risk grading system to assign a risk grade to each of its loans. Loans are graded on a scale ranging from Pass to Loss. A description of the general characteristics of the risk grades is as follows: • Pass – This grade represents loans ranging from acceptable to very little or no credit risk. These loans typically meet most if not all policy standards in regard to: loan amount as a percentage of collateral value, debt service coverage, profitability, leverage, and working capital. • Special Mention – This grade represents “Other Assets Especially Mentioned” in accordance with regulatory guidelines and includes loans that display some potential weaknesses which, if left unaddressed, may result in deterioration of the repayment prospects for the asset or may inadequately protect the Company’s position in the future. These loans warrant more than normal supervision and attention. • Substandard – This grade represents “Substandard” loans in accordance with regulatory guidelines. Loans within this rating typically exhibit weaknesses that are well defined to the point that repayment is jeopardized. Loss potential is, however, not necessarily evident. The underlying collateral supporting the credit appears to have sufficient value to protect the Company from loss of principal and accrued interest, or the loan has been written down to the point where this is true. There is a definite need for a well-defined workout/rehabilitation program. • Doubtful – This grade represents “Doubtful” loans in accordance with regulatory guidelines. An asset classified as Doubtful has all the weaknesses inherent in a loan classified Substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral, and financing plans. • Loss – This grade represents “Loss” loans in accordance with regulatory guidelines. A loan classified as Loss is considered uncollectible and of such little value that its continuance as a bankable asset is not warranted. This classification does not mean that the loan has absolutely no recovery or salvage value, but rather that it is not practical or desirable to defer writing off the loan, even though some recovery may be affected in the future. The portion of the loan that is graded loss should be charged off no later than the end of the quarter in which the loss is identified. The following tables present ending loan balances by loan category and risk grade for the periods indicated: Credit Quality Indicators Originated Loans – As of September 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total Originated Mortgage loans on real estate: Residential 1-4 family $ 348,668 $ 2,743 $ 4,235 $ — $ 355,646 Commercial 2,063,991 38,150 7,168 — 2,109,309 Total mortgage loans on real estate 2,412,659 40,893 11,403 — 2,464,955 Consumer: Home equity lines of credit 288,554 3,378 2,479 — 294,411 Home equity loans 23,819 1,184 2,031 — 27,034 Other 63,648 452 53 — 64,153 Total consumer loans 376,021 5,014 4,563 — 385,598 Commercial 242,308 8,968 5,103 256,379 Construction: Residential 158,657 — 250 — 158,907 Commercial 44,380 324 — — 44,704 Total construction loans 203,037 324 250 — 203,611 Total loans $ 3,234,025 $ 55,199 $ 21,319 $ — $ 3,310,543 Credit Quality Indicators PNCI Loans – As of September 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total PNCI Mortgage loans on real estate: Residential 1-4 family $ 145,141 $ 1,617 $ 1,973 $ — $ 148,731 Commercial 618,372 2,674 5,878 — 626,924 Total mortgage loans on real estate 763,513 4,291 7,851 — 775,655 Consumer: Home equity lines of credit 34,660 891 1,084 — 36,635 Home equity loans 2,841 — 74 — 2,915 Other 15,792 341 9 — 16,142 Total consumer loans 53,293 1,232 1,167 — 55,692 Commercial 19,399 1 169 19,569 Construction: Residential 5,980 4,147 — — 10,127 Commercial 457 — — — 457 Total construction loans 6,437 4,147 — — 10,584 Total loans $ 842,642 $ 9,671 $ 9,187 $ — $ 861,500 Credit Quality Indicators Originated Loans – As of December 31, 2018 (in thousands) Pass Special Substandard Doubtful / Loss Total Originated Mortgage loans on real estate: Residential 1-4 family $ 337,189 $ 1,724 $ 4,883 $ — $ 343,796 Commercial 1,861,627 33,483 15,871 — 1,910,981 Total mortgage loans on real estate 2,198,816 35,207 20,754 — 2,254,777 Consumer: Home equity lines of credit 279,491 2,309 2,653 — 284,453 Home equity loans 29,289 1,054 2,317 — 32,660 Other 33,606 341 73 — 34,020 Total consumer loans 342,386 3,704 5,043 — 351,133 Commercial 217,126 6,127 5,382 — 228,635 Construction: Residential 90,412 32 259 — 90,703 Commercial 55,863 345 — — 56,208 Total construction loans 146,275 377 259 — 146,911 Total loans $ 2,904,603 $ 45,415 $ 31,438 $ — $ 2,981,456 Credit Quality Indicators PNCI Loans – As of December 31, 2018 (in thousands) Pass Special Substandard Doubtful / Loss Total PNCI Mortgage loans on real estate: Residential 1-4 family $ 167,908 $ 1,086 $ 798 $ — $ 169,792 Commercial 701,868 3,085 3,448 — 708,401 Total mortgage loans on real estate 869,776 4,171 4,246 — 878,193 Consumer: Home equity lines of credit 38,780 1,124 1,053 — 40,957 Home equity loans 3,413 74 98 — 3,585 Other 21,481 173 5 — 21,659 Total consumer loans 63,674 1,371 1,156 — 66,201 Commercial 45,027 321 120 — 45,468 Construction: Residential 30,593 — — — 30,593 Commercial 5,880 — — — 5,880 Total construction loans 36,473 — — — 36,473 Total $ 1,014,950 $ 5,863 $ 5,522 $ — $ 1,026,335 Consumer loans, whether unsecured or secured by real estate, automobiles, or other personal property, are susceptible to three primary risks; non-payment due to income loss, over-extension of credit and, when the borrower is unable to pay, shortfall in collateral value. Typically, payment performance will follow general economic trends in the marketplace driven primarily by rises in the unemployment rate; non-payment is likely due to loss of employment. Loss of collateral value can be due to market demand shifts, damage to collateral itself or a combination of the two. Problem consumer loans are generally identified by payment history and current performance of the borrower (delinquency). The Bank manages its consumer loan portfolios by monitoring delinquency and contacting borrowers to encourage repayment, suggesting modifications if appropriate, and, when continued scheduled payments become unrealistic, initiating repossession or foreclosure through appropriate channels. Commercial real estate loans generally fall into two categories, owner-occupied and non-owner occupied. Loans secured by owner occupied real estate are primarily susceptible to changes in the business conditions of the related business. This may be driven by, among other things, industry changes, geographic business changes, changes in the individual fortunes of the business owner, and general economic conditions and changes in business cycles. These same risks apply to commercial loans whether secured by equipment or other personal property or unsecured. Losses on loans secured by owner occupied real estate, equipment, or other personal property generally are dictated by the value of underlying collateral at the time of default and liquidation of the collateral. When default is driven by issues related specifically to the business owner, collateral values tend to provide better repayment support and may result in little or no loss. Alternatively, when default is driven by more general economic conditions, underlying collateral generally has devalued more and results in larger losses due to default. Loans secured by non-owner occupied real estate are primarily susceptible to risks associated with swings in occupancy or vacancy and related shifts in lease rates, rental rates or room rates. Most often these shifts are a result of changes in general economic or market conditions or overbuilding and resultant over-supply. Losses are dependent on value of underlying collateral at the time of default. Values are generally driven by these same factors and influenced by interest rates and required rates of return as well as changes in occupancy costs. Construction loans, whether owner occupied or non-owner occupied commercial real estate loans or residential development loans, are not only susceptible to the related risks described above but the added risks of construction itself including cost over-runs, mismanagement of the project, or lack of demand or market changes experienced at time of completion. Again, losses are primarily related to underlying collateral value and changes therein as described above. Problem commercial loans are generally identified by periodic review of financial information which may include financial statements, tax returns, rent rolls and payment history of the borrower (delinquency). Based on this information the Bank may decide to take any of several courses of action including demand for repayment, additional collateral or guarantors, and, when repayment becomes unlikely through borrower’s income and cash flow, repossession or foreclosure of the underlying collateral. Collateral values may be determined by appraisals obtained through Bank approved, licensed appraisers, qualified independent third parties, public value information (blue book values for autos), sales invoices, or other appropriate means. Appropriate valuations or revaluations are obtained at initiation of the credit and periodically, but not less than every twelve months depending on collateral type, once repayment is questionable and the loan has been classified. Once a loan becomes delinquent and repayment becomes questionable, a Bank collection officer will address collateral shortfalls with the borrower and attempt to obtain additional collateral. If this is not forthcoming and payment in full is unlikely, the Bank will estimate its probable loss, using a recent valuation as appropriate to the underlying collateral less estimated costs of sale, and charge the loan down to the estimated net realizable amount. Depending on the length of time until ultimate collection, the Bank may revalue the underlying collateral and take additional charge-offs as warranted. Revaluations may occur as often as every 3-12 months depending on the underlying collateral and volatility of values. Final charge-offs or recoveries are taken when collateral is liquidated and actual loss is known. Unpaid balances on loans after or during collection and liquidation may also be pursued through lawsuit and attachment of wages or judgment liens on borrower’s other assets. The following table shows the ending balance of current and past due originated loans by loan category as of the date indicated: Analysis of Originated Past Due Loans - As of September 30, 2019 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ 289 $ 66 $ 1,187 $ 1,542 $ 354,104 $ 355,646 $ — Commercial 117 48 — 165 2,109,144 2,109,309 — Total mortgage loans on real estate 406 114 1,187 1,707 2,463,248 2,464,955 — Consumer: Home equity lines of credit 890 282 624 1,796 292,615 294,411 — Home equity loans 253 105 137 495 26,539 27,034 6 Other 134 138 4 276 63,877 64,153 — Total consumer loans 1,277 525 765 2,567 383,031 385,598 6 Commercial 955 227 272 1,454 254,925 256,379 30 Construction: Residential — — — — 158,907 158,907 — Commercial — — — — 44,704 44,704 — Total construction loans — — — — 203,611 203,611 — Total originated loans $ 2,638 $ 866 $ 2,224 $ 5,728 $ 3,304,815 $ 3,310,543 $ 36 The following table shows the ending balance of current and past due PNCI loans by loan category as of the date indicated: Analysis of PNCI Past Due Loans - As of September 30, 2019 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ — $ 52 $ 243 $ 295 $ 148,436 $ 148,731 $ — Commercial — — 949 949 625,975 626,924 — Total mortgage loans on real estate — 52 1,192 1,244 774,411 775,655 — Consumer: Home equity lines of credit 182 122 — 304 36,331 36,635 — Home equity loans — 14 232 246 2,669 2,915 — Other 54 7 — 61 16,081 16,142 — Total consumer loans 236 143 232 611 55,081 55,692 — Commercial — — 174 174 19,395 19,569 — Construction: Residential — — — — 10,127 10,127 — Commercial — — — — 457 457 — Total construction loans — — — — 10,584 10,584 — Total PNCI loans $ 236 $ 195 $ 1,598 $ 2,029 $ 859,471 $ 861,500 $ — The following table shows the ending balance of current and past due originated loans by loan category as of the date indicated: Analysis of Originated Past Due Loans - As of December 31, 2018 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ 1,675 $ 132 $ 478 $ 2,285 $ 341,511 $ 343,796 $ — Commercial 431 1,200 296 1,927 1,909,054 1,910,981 — Total mortgage loans on real estate 2,106 1,332 774 4,212 2,250,565 2,254,777 — Consumer: Home equity lines of credit 908 47 609 1,564 282,889 284,453 — Home equity loans 1,043 24 214 1,281 31,379 32,660 — Other 298 17 — 315 33,705 34,020 — Total consumer loans 2,249 88 823 3,160 347,973 351,133 — Commercial 1,053 579 1,247 2,879 225,756 228,635 — Construction: Residential 209 — — 209 90,494 90,703 — Commercial — — — — 56,208 56,208 — Total construction loans 209 — — 209 146,702 146,911 — Total loans $ 5,617 $ 1,999 $ 2,844 $ 10,460 $ 2,970,996 $ 2,981,456 $ — The following table shows the ending balance of current and past due PNCI loans by loan category as of the date indicated: Analysis of PNCI Past Due Loans - As of December 31, 2018 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ 1,009 $ 133 $ 156 $ 1,298 $ 168,494 $ 169,792 $ — Commercial 1,646 1,136 1,082 3,864 704,537 708,401 — Total mortgage loans on real estate 2,655 1,269 1,238 5,162 873,031 878,193 — Consumer: Home equity lines of credit 304 35 237 576 40,381 40,957 — Home equity loans 74 — — 74 3,511 3,585 — Other 160 — — 160 21,499 21,659 — Total consumer loans 538 35 237 810 65,391 66,201 — Commercial 678 145 113 936 44,532 45,468 — Construction: Residential — — — — 30,593 30,593 — Commercial — — — — 5,880 5,880 — Total construction loans — — — — 36,473 36,473 — Total loans $ 3,871 $ 1,449 $ 1,588 $ 6,908 $ 1,019,427 $ 1,026,335 $ — Interest income on originated nonaccrual loans that would have been recognized during the three months ended September 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $124,000 and $338,000, respectively. Interest income actually recognized on these originated loans during the three months ended September 30, 2019 and 2018 was $59,000 and $59,000, respectively. Interest income on PNCI nonaccrual loans that would have been recognized during the three months ended September 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $201,000 and $39,000, respectively. Interest income actually recognized on these PNCI loans during the three months ended September 30, 2019 and 2018 was $92,000 and $12,000. Interest income on originated nonaccrual loans that would have been recognized during the nine months ended September 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $692,000 and $964,000, respectively. Interest income actually recognized on these originated loans during the nine months ended September 30, 2019 and 2018 was $145,000 and $133,000, respectively. Interest income on PNCI nonaccrual loans that would have been recognized during the nine months ended September 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $322,000 and $93,000, respectively. Interest income actually recognized on these PNCI loans during the nine months ended September 30, 2019 and 2018 was $152,000 and $23,000. The following table shows the ending balance of nonaccrual originated and PNCI loans by loan category as of the date indicated: Non Accrual Loans As of September 30, 2019 As of December 31, 2018 (in thousands) Originated PNCI Total Originated PNCI Total Mortgage loans on real estate: Residential 1-4 family $ 2,820 $ 908 $ 3,728 $ 3,244 $ 334 $ 3,578 Commercial 2,532 3,253 5,785 9,263 1,468 10,731 Total mortgage loans on real estate 5,352 4,161 9,513 12,507 1,802 14,309 Consumer: Home equity lines of credit 1,188 426 1,614 1,429 885 2,314 Home equity loans 1,405 263 1,668 1,722 47 1,769 Other 90 3 93 3 4 7 Total consumer loans 2,683 692 3,375 3,154 936 4,090 Commercial 3,225 174 3,399 3,755 120 3,875 Construction: Residential — — — — — — Commercial — — — — — — Total construction — — — — — — Total non accrual loans $ 11,260 $ 5,027 $ 16,287 $ 19,416 $ 2,858 $ 22,274 Impaired originated loans are those where management has concluded that it is probable that the borrower will be unable to pay all amounts due in accordance with the original contractual terms of the loan agreement. The following tables show the recorded investment (financial statement balance), unpaid principal balance, average recorded investment, and interest income recognized for impaired Originated and PNCI loans, segregated by those with no related allowance recorded and those with an allowance recorded for the periods indicated. The average recorded investment in impaired loans and interest income recognized on impaired loans during the three months ended September 30, 2019 and 2018 was not considered significant for financial reporting purposes. Impaired Originated Loans – As of, or for the Nine months ended September 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 4,461 $ 3,053 $ 796 $ 3,849 $ 91 $ 4,214 $ 32 Commercial 6,006 4,423 1,329 5,752 26 9,096 59 Total mortgage loans on real estate 10,467 7,476 2,125 9,601 117 13,310 91 Consumer: Home equity lines of credit 1,279 1,232 — 1,232 — 1,662 26 Home equity loans 2,157 1,542 238 1,780 46 1,973 5 Other 74 3 51 54 14 46 1 Total consumer loans 3,510 2,777 289 3,066 60 3,681 32 Commercial 4,760 611 3,716 4,327 1,199 4,769 22 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 18,737 $ 10,864 $ 6,130 $ 16,994 $ 1,376 $ 21,760 $ 145 Impaired PNCI Loans – As of, or for the Nine months ended September 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 959 $ 908 $ — $ 908 $ — $ 621 $ 9 Commercial 3,255 3,253 — 3,253 — 2,360 134 Total mortgage loans on real estate 4,214 4,161 — 4,161 — 2,981 143 Consumer: Home equity lines of credit 741 444 241 685 84 844 — Home equity loans 395 376 — 376 — 308 9 Other 95 72 23 95 4 103 — Total consumer loans 1,231 892 264 1,156 88 1,255 9 Commercial 181 113 60 173 60 147 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 5,626 $ 5,166 $ 324 $ 5,490 $ 148 $ 4,383 $ 152 Impaired Originated Loans – As of, or for the Twelve Months Ended, December 31, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 4,594 $ 3,663 $ 308 $ 3,971 $ 56 $ 3,517 $ 90 Commercial 13,081 10,676 1,765 12,441 42 13,115 137 Total mortgage loans on real estate 17,675 14,339 2,073 16,412 98 16,632 227 Consumer: Home equity lines of credit 1,900 1,749 111 1,860 71 1,885 43 Home equity loans 2,374 1,892 65 1,957 2 1,520 23 Other 3 — 3 3 3 17 2 Total consumer loans 4,277 3,641 179 3,820 76 3,422 68 Commercial 5,433 2,924 2,287 5,211 1,774 4,654 91 Construction: Residential — — — — — 5 — Commercial — — — — — — — Total construction loans — — — — — 5 — Total $ 27,385 $ 20,904 $ 4,539 $ 25,443 $ 1,948 $ 24,713 $ 386 Impaired PNCI Loans – As of, or for the Twelve Months Ended, December 31, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 375 $ 334 $ — $ 334 $ — $ 529 $ 5 Commercial 3,110 1,468 — 1,468 — 1,713 183 Total mortgage loans on real estate 3,485 1,802 — 1,802 — 2,242 188 Consumer: Home equity lines of credit 1,027 587 367 954 127 1,120 18 Home equity loans 252 47 197 244 101 155 — Other 106 21 85 106 11 114 — Total consumer loans 1,385 655 649 1,304 239 1,389 18 Commercial 120 113 7 120 7 60 1 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 4,990 $ 2,570 $ 656 $ 3,226 $ 246 $ 3,691 $ 207 Impaired Originated Loans – As of, or for the Nine months ended September 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 4,185 $ 3,251 $ 311 $ 3,562 $ 57 $ 3,883 $ 67 Commercial 12,553 9,619 2,370 11,989 268 11,549 208 Total mortgage loans on real estate 16,738 12,870 2,681 15,551 325 15,432 275 Consumer: Home equity lines of credit 1,444 1,346 59 1,405 19 1,410 32 Home equity loans 2,554 1,960 157 2,117 30 1,753 24 Other 3 — 3 3 3 3 — Total consumer loans 4,001 3,306 219 3,525 52 3,166 56 Commercial 4,868 2,135 2,497 4,632 1,857 4,626 78 Construction: Residential — — — — — 68 — Commercial — — — — — — — Total construction loans — — — — — 68 — Total $ 25,607 $ 18,311 $ 5,397 $ 23,708 $ 2,234 $ 23,292 $ 409 Impaired PNCI Loans – As of, or for the Nine months ended September 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 1,302 $ 1,219 $ — $ 1,219 $ — $ 1,275 $ — Commercial 1,255 1,255 — 1,255 — 627 58 Total mortgage loans on real estate 2,557 2,474 — 2,474 — 1,902 58 Consumer: Home equity lines of credit 852 625 158 783 149 909 13 Home equity loans 296 50 239 289 145 287 9 Other 240 — 240 240 100 257 7 Total consumer loans 1,388 675 637 1,312 394 1,453 29 Commercial — — — — — — — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 3,945 $ 3,149 $ 637 $ 3,786 $ 394 $ 3,355 $ 87 Originated loans classified as TDRs and impaired were $8,556,000, $10,253,000, and $8,845,000 at September 30, 2019, December 31, 2018, and September 30, 2018, respectively. PNCI loans classified as TDRs and impaired were $738,000, $615,000, and $840,000 at September 30, 2019, December 31, 2018 and September 30, 2018, respectively. The Company had no significant obligations to lend additional funds on Originated or PNCI TDRs as of September 30, 2019, December 31, 2018, or September 30, 2018. The following tables show certain information regarding TDRs that occurred during the periods indicated: TDR Information for the three months ended September 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 family 2 $ 496 $ 500 $ 30 — $ — $ — Commercial 2 60 67 — — — — Total mortgage loans on real estate 4 556 567 30 — — — Consumer: Home equity lines of credit — — — — — — — Home equity loans — — — — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial 4 150 148 (2) — — — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total 4 $ 706 $ 715 $ 28 — $ — $ — TDR Information for the nine months ended September 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 family 3 $ 659 $ 662 $ 30 $ — $ — $ — Commercial 2 60 67 — — — — Total mortgage loans on real estate 5 719 729 30 — — — Consumer: Home equity lines of credit 1 65 68 — — — — Home equity loans 2 149 147 29 — — — Other — — — — — — — Total consumer loans 3 214 215 29 — — — Commercial 10 1,918 1,885 — 1 7 — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total 18 $ 2,851 $ 2,829 $ 59 $ 1 $ 7 $ — TDR Information for the three months ended September 30, 2018 (dollars in thousands) Number Pre-mod Post-mod Fin

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Note 6 - Leases The Company adopted ASU 2016-2 “Leases” (Topic 842) as of January 1, 2019, which requires the Company to record a right-of-use asset (“ROUA”) on the consolidated balance sheets for those leases that convey rights to control use of identified assets for a period of time in exchange for consideration. The Company is also required to record a lease liability on the consolidated balance sheets for the present value of future payment commitments. All of the Company’s leases are comprised of operating leases in which the Company is lessee of real estate property for branches, ATM locations, and general administration and operations. The Company elected not to include short-term leases (i.e. leases with initial terms of twelve months or less) within the ROUA and lease liability. Known or determinable adjustments to the required minimum future lease payments were included in the calculation of the Company’s ROUA and lease liability. Adjustments to the required minimum future lease payments that are variable and will not be determinable until a future period, such as changes in the consumer price index, are included as variable lease costs. Additionally, expected variable payments for common area maintenance, taxes and insurance were unknown and not determinable at lease commencement and therefore, were not included in the determination of the Company’s ROUA or lease liability. The value of the ROUA and lease liability is impacted by the amount of the periodic payment required, length of the lease term, and the discount rate used to calculate the present value of the minimum lease payments. The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. For operating leases existing prior to January 1, 2019, the rate for the remaining lease term as of January 1, 2019 was used. The lease liability is reduced based on the discounted present value of remaining payments as of each reporting period. The ROUA value is measured using the amount of lease liability and adjusted for prepaid or accrued lease payments, remaining lease incentives, unamortized direct costs (if any), and impairment (if any). The following table presents the components of lease expense for the three and nine months ended September 30, 2019: (in thousands) Three months ended Nine months ended Operating lease cost $ 1,306 $ 3,924 Short-term lease cost 65 194 Variable lease cost (13) (33) Sublease income (32) (98) Total lease cost $ 1,326 $ 3,987 Prior to the adoption of ASU 2016-2, rent expense under operating leases was $1,161,000 and $2,937,000 during the three and nine months ended September 30, 2018, respectively. Rent expense was offset by rent income of $10,000 and $31,000 during the three and nine months ended September 30, 2018, respectively. The following table presents supplemental cash flow information related to leases for the nine months ended September 30, 2019: (in thousands) Three months ended Nine months ended Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,236 $ 3,683 ROUA obtained in exchange for operating lease liabilities $ — $ 32,162 The following table presents the weighted average operating lease term and discount rate at September 30, 2019: Weighted-average remaining lease term 9.4 years Weighted-average discount rate 3.19 % At September 30, 2019, future expected operating lease payments are as follows: (in thousands) Periods ending December 31, 2019 $ 1,180 2020 4,389 2021 4,235 2022 3,896 2023 3,216 Thereafter 16,682 33,598 Discount for present value of expected cash flows (5,104) Lease liability at September 30, 2019 $ 28,494

Deposits

Deposits	9 Months Ended
	Sep. 30, 2019
Deposits [Abstract]
Deposits	Note 7 - Deposits A summary of the balances of deposits follows (in thousands): September 30, December 31, Noninterest-bearing demand $ 1,777,357 $ 1,760,580 Interest-bearing demand 1,222,955 1,252,366 Savings 1,843,873 1,921,324 Time certificates, $250,000 or more 148,449 132,429 Other time certificates 302,773 299,767 Total deposits $ 5,295,407 $ 5,366,466 Certificate of deposit balances of $50,000,000 and $60,000,000 from the State of California were included in time certificates, over $250,000, at September 30, 2019 and December 31, 2018, respectively. The Company participates in a deposit program offered by the State of California whereby the State may make deposits at the Company’s request subject to collateral and credit worthiness constraints. The negotiated rates on these State deposits are generally more favorable than other wholesale funding sources available to the Company. Overdrawn deposit balances of $1,431,000 and $1,469,000 were classified as consumer loans at September 30, 2019 and December 31, 2018, respectively

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 8 - Commitments and Contingencies The following table presents a summary of the Bank’s commitments and contingent liabilities: (in thousands) September 30, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 325,681 $ 306,191 Consumer loans 512,345 496,575 Real estate mortgage loans 189,700 140,292 Real estate construction loans 182,701 248,996 Standby letters of credit 12,368 11,346 Deposit account overdraft privilege 111,187 111,956

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Shareholders' Equity	Note 9 - Shareholders’ Equity Dividends Paid The Bank paid to the Company cash dividends in the aggregate amounts of $7,011,000 and $13,507,000 during the three months ended September 30, 2019 and 2018, respectively and $25,361,000 and $22,649,000 during the nine months ended September 30, 2019 and 2018, respectively. The Bank is regulated by the Federal Deposit Insurance Corporation (FDIC) and the State of California Department of Business Oversight (DBO). Absent approval from the Commissioner of the DBO, California banking laws generally limit the Bank’s ability to pay dividends to the lesser of (1) retained earnings or (2) net income for the last three fiscal years, less cash distributions paid during such period. Stock Repurchase Plan On August 21, 2007, the Board of Directors adopted a plan to repurchase, as conditions warrant, up to 500,000 shares of the Company’s common stock on the open market. The timing of purchases and the exact number of shares to be purchased will depend on market conditions. This stock repurchase plan has no expiration date. As of September 30, 2019, the Company had repurchased 196,566 shares under this plan. During the nine month periods ended September 30, 2019 and 2018, there were no shares of common stock repurchased under this plan. Stock Repurchased Under Equity Compensation Plans During the three months ended September 30, 2019 and 2018, employees tendered 3,820 and 11,630 shares, respectively, of the Company’s common stock with market value of $147,000, and $453,000, respectively, in lieu of cash to exercise options to purchase shares of the Company’s stock and to pay income taxes related to equity compensation plan instruments as permitted by the Company’s shareholder-approved equity compensation plans. During the nine months ended September 30, 2019 and 2018, employees tendered 123,734 and 28,850 shares, respectively, of the Company’s common stock with market value of $4,842,000, and $1,124,000, respectively, in lieu of cash to exercise options to purchase shares of the Company’s stock and to pay income taxes related to equity compensation plan instruments as permitted by the Company’s shareholder-approved equity compensation plans. The tendered shares were retired. The market value of tendered shares is based on the last market trade price at closing on the day an option is exercised. Stock repurchased under equity incentive plans are not included in the total of stock repurchased under the stock repurchase plan announced on August 21, 2007.

Stock Options and Other Equity-

Stock Options and Other Equity-Based Incentive Instruments	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock Options and Other Equity-Based Incentive Instruments	Note 10 - Stock Options and Other Equity-Based Incentive Instruments The Company’s 2009 Equity Incentive Plan (2009 Plan) expired on March 26, 2019. While no new awards can be granted under the 2009 Plan, existing grants continue to be governed by the terms, conditions and procedures set forth in any applicable award agreement. On April 16, 2019, the Board of Directors adopted the 2019 Equity Incentive Plan (2019 Plan) which was approved by shareholders on May 21, 2019. The 2019 Plan allows for up to 1,500,000 shares to be issued in connection with equity-based incentives. All grants of equity awards made during the nine months ended September 30, 2019 were made from the 2019 Plan. Stock option activity during the nine months ended September 30, 2019 is summarized in the following table: Number Option Price Weighted Outstanding at December 31, 2018 343,000 $12.63 to $23.21 $ 16.67 Options granted — — to — — Options exercised (166,000) $12.63 to $19.46 15.93 Options forfeited — — to — — Outstanding at September 30, 2019 177,000 $14.54 to $23.21 $ 17.52 The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of September 30, 2019: Currently Currently Not Total Number of options 176,625 375 177,000 Weighted average exercise price $ 17.50 $ 23.21 $ 17.52 Intrinsic value (in thousands) $ 3,321 $ 5 $ 3,326 Weighted average remaining contractual term (yrs.) 2.9 5.0 2.9 The 375 options that are currently not exercisable as of September 30, 2019 are expected to vest, on a weighted-average basis, over the next three months. The Company did not modify any option grants during 2018 or the nine months ended September 30, 2019. Service Market Plus Outstanding at December 31, 2018 66,947 45,536 RSUs granted 35,272 22,898 RSUs added through dividend and performance credits 946 7,414 RSUs released (30,461) (22,237) RSUs forfeited/expired (1,876) (2,299) Outstanding at September 30, 2019 70,828 51,312 The 70,828 of service condition vesting RSUs outstanding as of September 30, 2019 include a feature whereby each RSU outstanding is credited with a dividend amount equal to any common stock cash dividend declared and paid, and the credited amount is divided by the closing price of the Company’s stock on the dividend payable date to arrive at an additional amount of RSUs outstanding under the original grant. The dividend credits follow the same vesting requirements as the RSU awards and are not considered participating securities. The 70,828 of service condition vesting RSUs outstanding as of September 30, 2019 are expected to vest, and be released, on a weighted-average basis, over the next 1.2 years. The Company expects to recognize $2,135,210 of pre-tax compensation costs related to these service condition vesting RSUs between September 30, 2019 and their vesting dates. The Company did not modify any service condition vesting RSUs during 2018 or during the nine months ended September 30, 2019. The 51,312 of market plus service condition vesting RSUs outstanding as of September 30, 2019 are expected to vest, and be released, on a weighted-average basis, over the next 1.9 years. The Company expects to recognize $1,045,845 of pre-tax compensation costs related to these RSUs between September 30, 2019 and their vesting dates. As of September 30, 2019, the number of market plus service condition vesting RSUs outstanding that will actually vest, and be released, may be reduced to zero or increased to 76,968 depending on the total return of the Company’s common stock versus the total return of an index of bank stocks from the grant date to the vesting date. The Company did not modify any market plus service condition vesting RSUs during 2018 or during the nine months ended September 30, 2019.

Noninterest Income and Expense

Noninterest Income and Expense	9 Months Ended
	Sep. 30, 2019
Other Income and Expenses [Abstract]
Noninterest Income and Expense	Note 11 - Non-interest Income and Expense The following table summarizes the Company’s non-interest income for the periods indicated: Three months ended Nine months ended September 30, (dollars in thousands) 2019 2018 2019 2018 ATM and interchange fees $ 5,427 $ 4,590 $ 15,412 $ 13,335 Service charges on deposit accounts 4,327 4,015 12,389 11,407 Other service fees 808 676 2,198 2,020 Mortgage banking service fees 483 499 1,441 1,527 Change in value of mortgage servicing rights (455) (37) (1,652) 38 Total service charges and fees 10,590 9,743 29,788 28,327 Increase in cash value of life insurance 773 732 2,294 1,996 Asset management and commission income 721 728 2,102 2,414 Gain on sale of loans 1,236 539 2,223 1,831 Lease brokerage income 172 186 631 514 Sale of customer checks 126 88 401 327 Gain on sale of investment securities 107 207 107 207 Gain (loss) on marketable equity securities 22 (22) 100 (92) Other 361 135 1,688 942 Total other non-interest income 3,518 2,593 9,546 8,139 Total non-interest income $ 14,108 $ 12,336 $ 39,334 $ 36,466 The components of non-interest expense were as follows (in thousands): Three months ended Nine months ended September 30, 2019 2018 2019 2018 Base salaries, net of deferred loan origination costs $ 17,656 $ 15,685 $ 51,624 $ 44,076 Incentive compensation 3,791 4,515 10,064 9,126 Benefits and other compensation costs 5,452 5,623 17,058 15,726 Total salaries and benefits expense 26,899 25,823 78,746 68,928 Occupancy 3,711 3,173 11,223 8,574 Data processing and software 3,411 2,786 10,114 7,979 Equipment 1,679 1,750 5,298 4,938 Intangible amortization 1,431 1,390 4,293 2,068 Advertising 1,358 1,341 4,222 3,214 ATM and POS network charges 1,343 1,197 3,936 3,860 Professional fees 999 1,352 2,895 2,898 Telecommunications 867 819 2,437 2,201 Regulatory assessments and insurance 94 537 1,095 1,384 Merger and acquisition expense — 4,150 — 5,227 Postage 438 275 1,063 934 Operational losses 228 217 679 763 Courier service 357 278 1,039 769 Gain on sale of foreclosed assets (50) (2) (246) (390) Loss on disposal of fixed assets 2 152 82 206 Other miscellaneous expense 3,577 2,290 11,617 9,673 Total other non-interest expense 19,445 21,705 59,747 54,298 Total non-interest expense $ 46,344 $ 47,528 $ 138,493 $ 123,226

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Note 12 - Earnings Per Share Basic earnings per share represent income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustments to income that would result from assumed issuance. Potential common shares that may be issued by the Company relate to outstanding stock options and restricted stock units (RSUs), and are determined using the treasury stock method. Earnings per share have been computed based on the following: Three months ended (in thousands) 2019 2018 Net income $ 23,395 $ 16,170 Average number of common shares outstanding 30,509 30,011 Effect of dilutive stock options and restricted stock 120 280 Average number of common shares outstanding used to calculate diluted earnings 30,629 30,291 Options excluded from diluted earnings per share because the effect of these 42 10 Nine months ended (in thousands) 2019 2018 Net income $ 69,182 $ 45,109 Average number of common shares outstanding 30,464 25,317 Effect of dilutive stock options and restricted stock 179 300 Average number of common shares outstanding used to calculate diluted earnings 30,643 25,617 Options excluded from diluted earnings per share because the effect of these 42 10

Comprehensive Income

Comprehensive Income	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Comprehensive Income	Comprehensive Income Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available-for-sale securities, are reported as a separate component of the equity section of the balance sheet, such items, along with net income, are components of other comprehensive income. The components of other comprehensive income (loss) and related tax effects are as follows: Three months ended September 30, Nine months ended September 30, (in thousands) 2019 2018 2019 2018 Unrealized holding gains (losses) on available for sale securities before reclassifications $ 5,355 $ (8,193) $ 27,618 $ (29,134) Amounts reclassified out of accumulated other comprehensive income: Realized (gain) loss on debt securities (107) (207) (107) (207) Adoption ASU 2016-01 — — — 62 Adoption ASU 2018-02 — — — (425) Total amounts reclassified out of accumulated other comprehensive income (loss) (107) (207) (107) (570) Unrealized holding gains (losses) on available for sale securities after reclassifications 5,248 (8,400) 27,511 (29,704) Tax effect (1,551) 2,483 (8,133) 8,763 Unrealized holding gains (losses) on available for sale securities, net of tax 3,697 (5,917) 19,378 (20,941) Change in unfunded status of the supplemental retirement plans before reclassifications (89) — (266) 668 Amounts reclassified out of accumulated other comprehensive income (loss): Amortization of prior service cost (13) (13) (40) (40) Amortization of actuarial losses 102 128 306 382 Adoption ASU 2018-02 — — — (668) Total amounts reclassified out of accumulated other comprehensive income (loss) 89 115 266 (326) Change in unfunded status of the supplemental retirement plans after reclassifications — 115 — 342 Tax effect — (34) — (101) Change in unfunded status of the supplemental retirement plans, net of tax — 81 — 241 Total other comprehensive income (loss) $ 3,697 $ (5,836) $ 19,378 $ (20,700) The components of accumulated other comprehensive income (loss), included in shareholders’ equity, are as follows: (in thousands) September 30, December 31, Net unrealized gain (loss) on available for sale securities $ 6,537 $ (20,974) Tax effect (1,932) 6,201 Unrealized holding gain (loss) on available for sale securities, net of tax 4,605 (14,773) Unfunded status of the supplemental retirement plans (4,802) (4,802) Tax effect 1,420 1,420 Unfunded status of the supplemental retirement plans, net of tax (3,382) (3,382) Joint beneficiary agreement liability 276 276 Tax effect — — Joint beneficiary agreement liability, net of tax 276 276 Accumulated other comprehensive gain (loss) $ 1,499 $ (17,879)

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurement	Note 14 - Fair Value Measurement The Company utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, income approach, and/or the cost approach. Inputs to valuation techniques include the assumptions that market participants would use in pricing an asset or liability including assumptions about the risk inherent in a particular valuation technique, the effect of a restriction on the sale or use of an asset and the risk of nonperformance. Marketable equity securities, debt securities available-for-sale, loans held for sale, and mortgage servicing rights are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other assets on a nonrecurring basis, such loans held for investment and certain other assets. These nonrecurring fair value adjustments typically involve application impairment write-downs of individual assets. The Company groups assets and liabilities at fair value in three levels, based on the markets in which the assets and liabilities are traded and the observable nature of the assumptions used to determine fair value. These levels are: Level 1 - Valuation is based upon quoted prices for identical instruments traded in active markets. Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. Level 3 - Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques. Marketable equity securities and debt securities available for sale - Marketable equity securities and debt securities available for sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss assumptions. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Level 2 securities include mortgage-backed securities issued by government sponsored entities, municipal bonds and corporate debt securities. The Company had no securities classified as Level 3 during any of the periods covered in these financial statements. Loans held for sale - Loans held for sale are carried at the lower of cost or fair value. The fair value of loans held for sale is based on what secondary markets are currently offering for loans with similar characteristics. As such, we classify those loans subjected to recurring fair value adjustments as Level 2. Impaired originated and PNCI loans - Originated and PNCI loans are not recorded at fair value on a recurring basis. However, from time to time, an originated or PNCI loan is considered impaired and an allowance for loan losses is established. Originated and PNCI loans for which it is probable that payment of interest and principal will not be made in accordance with the original contractual terms of the loan agreement are considered impaired. The fair value of an impaired originated or PNCI loan is estimated using one of several methods, including collateral value, fair value of similar debt, enterprise value, liquidation value and discounted cash flows. Those impaired originated and PNCI loans not requiring an allowance represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans. Impaired originated and PNCI loans where an allowance is established based on the fair value of collateral require classification in the fair value hierarchy. When the fair value of the collateral is based on an observable market price or a current appraised value which uses substantially observable data, the Company records the impaired originated or PNCI loan as nonrecurring Level 2. When an appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value, or the appraised value contains a significant unobservable assumption, such as deviations from comparable sales, and there is no observable market price, the Company records the impaired originated or PNCI loan as nonrecurring Level 3. Foreclosed assets - Foreclosed assets include assets acquired through, or in lieu of, loan foreclosure. Foreclosed assets are held for sale and are initially recorded at fair value at the date of foreclosure, establishing a new cost basis. Subsequent to foreclosure, management periodically performs valuations and the assets are carried at the lower of carrying amount or fair value less cost to sell. When the fair value of foreclosed assets is based on an observable market price or a current appraised value which uses substantially observable data, the Company records the impaired originated loan as nonrecurring Level 2. When an appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value, or the appraised value contains a significant unobservable assumption, such as deviations from comparable sales, and there is no observable market price, the Company records the foreclosed asset as nonrecurring Level 3. Revenue and expenses from operations and changes in the valuation allowance are included in other non-interest expense. Mortgage servicing rights - Mortgage servicing rights are carried at fair value. A valuation model, which utilizes a discounted cash flow analysis using a discount rate and prepayment speed assumptions is used in the computation of the fair value measurement. While the prepayment speed assumption is currently quoted for comparable instruments, the discount rate assumption currently requires a significant degree of management judgment and is therefore considered an unobservable input. As such, the Company classifies mortgage servicing rights subjected to recurring fair value adjustments as Level 3. The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis (in thousands): Fair value at September 30, 2019 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,974 $ 2,974 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 495,637 — 495,637 — Obligations of states and political subdivisions 111,910 — 111,910 — Corporate bonds 4,528 — 4,528 — Asset backed securities 372,005 — 372,005 — Loans held for sale 7,604 — 7,604 — Mortgage servicing rights 6,072 — — 6,072 Total assets measured at fair value $ 1,000,730 $ 2,974 $ 991,684 $ 6,072 Fair value at December 31, 2018 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,874 $ 2,874 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 629,981 — 629,981 — Obligations of states and political subdivisions 126,072 — 126,072 — Corporate bonds 4,478 — 4,478 — Asset backed securities 354,505 — 354,505 — Loans held for sale 3,687 — 3,687 — Mortgage servicing rights 7,098 — — 7,098 Total assets measured at fair value $ 1,128,695 $ 2,874 $ 1,118,723 $ 7,098 Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally corresponds with the Company’s quarterly valuation process. There were no transfers between any levels during the nine months ended September 30, 2019 or the year ended December 31, 2018. The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the time periods indicated. Had there been any transfer into or out of Level 3 during the time periods indicated, the amount included in the “Transfers into (out of) Level 3” column would represent the beginning balance of an item in the period (interim quarter) during which it was transferred (in thousands): Three months ended September 30, Beginning Transfers Change Issuances Ending 2019: Mortgage servicing rights $ 6,229 — $ (455) $ 298 $ 6,072 2018: Mortgage servicing rights $ 7,021 — $ (37) $ 138 $ 7,122 Nine months ended September 30, Beginning Transfers Change Issuances Ending 2019: Mortgage servicing rights $ 7,098 — $ (1,652) $ 626 $ 6,072 2018: Mortgage servicing rights $ 6,687 — $ 38 $ 397 $ 7,122 The key unobservable inputs used in determining the fair value of mortgage servicing rights are mortgage prepayment speeds and the discount rate used to discount cash projected cash flows. Generally, any significant increases in the mortgage prepayment speed and discount rate utilized in the fair value measurement of the mortgage servicing rights will result in a negative fair value adjustments (and decrease in the fair value measurement). Conversely, a decrease in the mortgage prepayment speed and discount rate will result in a positive fair value adjustment (and increase in the fair value measurement). The following table presents quantitative information about recurring Level 3 fair value measurements at September 30, 2019 and December 31, 2018: As of September 30, 2019: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 6,072 Discounted cash flow Constant prepayment rate 7% - 42%; 11% Discount rate 10% - 14%; 12% As of December 31, 2018: Mortgage Servicing Rights $ 7,098 Discounted cash flow Constant prepayment rate 5% - 27.3%; 7.6% Discount rate 12% - 13%; 12% The tables below present the recorded investment in assets and liabilities measured at fair value on a nonrecurring basis, as of the dates indicated (in thousands): September 30, 2019 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 1,055 — — $ 1,055 $ (652) Foreclosed assets 417 — — 417 (27) Total assets measured at fair value $ 1,472 — — $ 1,472 $ (679) December 31, 2018 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 281 — — $ 281 $ (294) Foreclosed assets 1,311 — — 1,311 (8) Total assets measured at fair value $ 1,592 — — $ 1,592 $ (302) September 30, 2018 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 445 — — $ 445 $ (808) Foreclosed assets 863 — — 863 (23) Total assets measured at fair value $ 1,308 — — $ 1,308 $ (831) The impaired originated and PNCI loan amount above represents impaired, collateral dependent loans that have been adjusted to fair value. When the Company identifies a collateral dependent loan as impaired, the Company measures the impairment using the current fair value of the collateral, less selling costs. Depending on the characteristics of a loan, the fair value of collateral is generally estimated by obtaining external appraisals. If the Company determines that the value of the impaired loan is less than the recorded investment in the loan, the Company recognizes this impairment and adjust the carrying value of the loan to fair value through the allowance for loan and lease losses. The loss represents charge-offs or impairments on collateral dependent loans for fair value adjustments based on the fair value of collateral. The carrying value of loans fully charged-off is zero. The foreclosed assets amount above represents impaired real estate that has been adjusted to fair value. Foreclosed assets represent 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 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 and lease losses. After foreclosure, management periodically performs valuations such that the real estate is carried at the lower of its new cost basis or fair value, net of estimated costs to sell. Fair value adjustments on other real estate owned are recognized within net loss on real estate owned. The loss represents impairments on real estate owned for fair value adjustments based on the fair value of the real estate. The Company’s property appraisals are primarily based on the sales comparison approach and income approach methodologies, which consider recent sales of comparable properties, including their income generating characteristics, and then make adjustments to reflect the general assumptions that a market participant would make when analyzing the property for purchase. These adjustments may increase or decrease an appraised value and can vary significantly depending on the location, physical characteristics and income producing potential of each property. Additionally, the quality and volume of market information available at the time of the appraisal can vary from period to period and cause significant changes to the nature and magnitude of comparable sale adjustments. Given these variations, comparable sale adjustments are generally not a reliable indicator for how fair value will increase or decrease from period to period. Under certain circumstances, management discounts are applied based on specific characteristics of an individual property. The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at September 30, 2019: September 30, 2019 Fair Value Valuation Unobservable Inputs Range, Impaired Originated & PNCI loans $ 1,055 Sales comparison Adjustment for differences between Not meaningful Foreclosed assets (Residential real estate) $ 417 Sales comparison Adjustment for differences between Not meaningful The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at December 31, 2018: December 31, 2018 Fair Value Valuation Unobservable Inputs Range, Impaired Originated & PNCI loans $ 281 Sales comparison Adjustment for differences between (16.30)% - 35.14%; 10.45% N/A Foreclosed assets (Residential real estate) $ 693 Sales comparison Adjustment for differences between (21.83)% - 7.25%; (3.75)% Foreclosed assets (Commercial real estate) $ 618 Sales comparison Adjustment for differences between (65)% - 20%; (45)% Fair values for financial instruments are management’s estimates of the values at which the instruments could be exchanged in a transaction between willing parties. The Company uses the exit price notion when measuring the fair value of financial instruments. These estimates are subjective and may vary significantly from amounts that would be realized in actual transactions. In addition, other significant assets are not considered financial assets including, any mortgage banking operations, deferred tax assets, and premises and equipment. Further, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on the fair value estimates and have not been considered in any of these estimates. September 30, 2019 December 31, 2018 (in thousands) Carrying Fair Carrying Fair Financial assets: Level 1 inputs: Cash and due from banks $ 118,960 $ 118,960 $ 119,781 $ 119,781 Cash at Federal Reserve and other banks 140,087 140,087 107,752 107,752 Level 2 inputs: Securities held to maturity 393,449 399,699 444,936 437,370 Restricted equity securities 17,250 N/A 17,250 N/A Loans held for sale 7,604 7,604 3,687 4,616 Level 3 inputs: Loans, net 4,150,811 4,137,528 3,989,432 4,006,986 Financial liabilities: Level 2 inputs: Deposits 5,295,407 5,294,348 5,366,466 5,362,173 Other borrowings 16,423 16,423 15,839 15,839 Level 3 inputs: Junior subordinated debt 57,180 56,209 57,042 62,610 (in thouands) Contract Fair Contract Fair Off-balance sheet: Level 3 inputs: Commitments $ 1,210,427 $ 12,104 $ 1,192,054 $ 11,921 Standby letters of credit 12,368 124 11,346 113 Overdraft privilege commitments 111,187 1,112 111,956 1,120

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Regulatory Matters	Note 15 - Regulatory Matters The Company is 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 Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company to maintain minimum amounts and ratios (set forth in the table below) of total, Tier 1, and common equity Tier 1 capital to risk-weighted assets, and of Tier 1 capital to average assets. The following tables present actual and required capital ratios as of September 30, 2019 and December 31, 2018 for the Company and the Bank under applicable Basel III Capital Rules. The minimum capital amounts presented include the minimum required capital levels as of September 30, 2019 and December 31, 2018 based on the then phased-in provisions of the Basel III Capital Rules. As of January 1, 2019, the minimum required capital levels of the Basel III Capital Rules have been fully phased-in. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required to be As of September 30, 2019: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 735,884 15.23 % $ 507,335 10.50 % N/A N/A Tri Counties Bank $ 731,359 15.14 % $ 507,152 10.50 % $ 483,002 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 701,703 14.52 % $ 410,700 8.50 % N/A N/A Tri Counties Bank $ 697,178 14.43 % $ 410,551 8.50 % $ 386,401 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 646,240 13.37 % $ 338,224 7.00 % N/A N/A Tri Counties Bank $ 697,178 14.43 % $ 338,101 7.00 % $ 313,951 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 701,703 11.31 % $ 248,073 4.00 % N/A N/A Tri Counties Bank $ 697,178 11.24 % $ 248,068 4.00 % $ 310,085 5.00 % Actual Minimum Capital Minimum Capital Required to be As of December 31, 2018: Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 682,419 14.40 % $ 467,874 9.875 % $ 497,486 10.50 % N/A N/A Tri Counties Bank $ 680,624 14.37 % $ 467,704 9.875 % $ 497,305 10.50 % $ 473,624 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 647,262 13.66 % $ 373,115 7.875 % $ 402,727 8.50 % N/A N/A Tri Counties Bank $ 645,467 13.63 % $ 372,979 7.875 % $ 402,581 8.50 % $ 378,899 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 591,933 12.49 % $ 302,045 6.375 % $ 331,658 7.00 % N/A N/A Tri Counties Bank $ 645,467 13.63 % $ 301,935 6.375 % $ 331,537 7.00 % $ 307,856 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 647,262 10.68 % $ 242,452 4.000 % $ 242,452 4.00 % N/A N/A Tri Counties Bank $ 645,467 10.65 % $ 242,447 4.000 % $ 242,447 4.00 % $ 303,059 5.00 % As of September 30, 2019 and December 31, 2018, capital levels at the Company and the Bank exceed all capital adequacy requirements under the Basel III Capital Rules. Also, at September 30, 2019 and December 31, 2018, the Bank’s capital levels exceeded the minimum amounts necessary to be considered well capitalized under the current regulatory framework for prompt corrective action. The Basel III Capital Rules require for all banking organizations to maintain a capital conservation buffer above the minimum risk-based capital requirements in order to avoid certain limitations on capital distributions, stock repurchases and discretionary bonus payments to executive officers. The capital conservation buffer is exclusively composed of common equity tier 1 capital, and it applies to each of the risk-based capital ratios but not the leverage ratio. At September 30, 2019, the Company and the Bank are in compliance with the capital conservation buffer requirement.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation TriCo Bancshares (the “Company” or “we”) is a California corporation organized to act as a bank holding company for Tri Counties Bank (the “Bank”). The Company and the Bank are headquartered in Chico, California. The Bank is a California-chartered bank that is engaged in the general commercial banking business in 29 California counties. The Company has five capital subsidiary business trusts (collectively, the “Capital Trusts”) that issued trust preferred securities, including two organized by the Company and three acquired with the acquisition of North Valley Bancorp. The consolidated financial statements are prepared in accordance with accounting policies generally accepted in the United States of America and general practices in the banking industry. All adjustments necessary for a fair presentation of these consolidated financial statements have been included and are of a normal and recurring nature. The financial statements include the accounts of the Company. All inter-company accounts and transactions have been eliminated in consolidation. For financial reporting purposes, the Company’s investments in the Capital Trusts of $1,717,000 are accounted for under the equity method and, accordingly, are not consolidated and are included in other assets on the consolidated balance sheet. The subordinated debentures issued and guaranteed by the Company and held by the Capital Trusts are reflected as debt on the Company’s consolidated balance sheet.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (the “2018 Annual Report”). The Company believes that the disclosures made are adequate to make the information not misleading.
Segment and Significant Group Concentration of Credit Risk	Segment and Significant Group Concentration of Credit Risk The Company grants agribusiness, commercial, consumer, and residential loans to customers located throughout northern and central California. The Company has a diversified loan portfolio within the business segments located in this geographical area. The Company currently classifies all its operation into one business segment that it denotes as community banking.
Geographical Descriptions	Geographical Descriptions For the purpose of describing the geographical location of the Company’s operations, the Company has defined northern California as that area of California north of, and including, Stockton to the east and San Jose to the west; central California as that area of the state south of Stockton and San Jose, to and including, Bakersfield to the east and San Luis Obispo to the west; and southern California as that area of the state south of Bakersfield and San Luis Obispo.
Cash and Cash Equivalents	Cash and Cash Equivalents Net cash flows are reported for loan and deposit transactions and other borrowings. For purposes of the consolidated statement of cash flows, cash, due from banks with original maturities less than 90 days, interest-earning deposits in other banks, and Federal funds sold are considered to be cash equivalents.
Accounting Standards Adopted in 2019	Accounting Standards Adopted in 2019 The Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-2, Leases (Topic 842) . ASU 2016-2, which among other things, requires lessees to recognize most leases on-balance sheet, increasing reported assets and liabilities. Lessor accounting remains substantially similar to current U.S. GAAP. The FASB has issued incremental guidance to Topic 842 standard through ASU No. 2018-11, 2018-20, and 2019-1. The Company has elected to use the transition relief approach as provided in ASU 2018-11, which permits the Company to use January 1, 2019 as both the application date and the adoption date, rather than the modified retrospective approach which would have required an application date of January 1, 2017 and adoption date of January 1, 2019. The Company also elected certain relief options offered within the new standard, which include the package of practical expedients, the option not to recognize a right-of-use asset (ROUA) and lease liability that arise from short-term leases (i.e. leases with terms of 12 months or less), and the option of hindsight when determining lease term. Substantially all of the Company’s lease agreements are considered operating leases and were not previously recognized on the Company’s balance sheets. As of January 1, 2019, the Company recorded a ROUA and corresponding lease liability for all applicable operating leases. While the guidance increased the Company’s gross assets and liabilities, the adoption of ASU 2016-2 did not have a material impact on the consolidated statements of income or the consolidated statements of cash flows. See Note 6 for more information.
Accounting Standards Pending Adoption	ccounting Standards Pending Adoption The FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326) . ASU 2016-13 is the final guidance on the new current expected credit loss (‘‘CECL’’) model. ASU 2016-13, among other things, requires the incurred loss impairment methodology in current GAAP be replaced with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to estimate future credit loss estimates. As CECL encompasses all financial assets carried at amortized cost, the requirement that reserves be established based on an organization’s reasonable and supportable estimate of expected credit losses extends to held to maturity (‘‘HTM’’) debt securities. ASU 2016-13 amends the accounting for credit losses on available-for-sale securities (‘‘AFS’’), whereby credit losses will be presented as an allowance as opposed to a write- down. In addition, CECL will modify the accounting for purchased loans with credit deterioration since origination, so that reserves are established at the date of acquisition for purchased loans. Lastly, ASU 2016-13 requires enhanced disclosures on the significant estimates and judgments used to estimate credit losses, as well as on the credit quality and underwriting standards of an organization’s portfolio. These disclosures require organizations to present the currently required credit quality disclosures disaggregated by the year of origination or vintage. ASU 2016-13 allows for a modified retrospective approach with a cumulative effect adjustment to the balance sheet upon adoption (charge to retained earnings instead of the income statement). ASU 2016-13 will be effective for the Company on January 1, 2020, and early adoption is permitted. While the Company is currently evaluating the provisions of ASU 2016-13 to determine the potential impact the new standard will have on the Company’s consolidated financial statements, it has taken steps to prepare for the implementation when it becomes effective, such as forming an internal task force, gathering pertinent data, consulting with outside professionals, and evaluating its current IT systems. While detailed modeling efforts are ongoing, the validation of expected credit loss estimates will likely not be available until late in 2019. Management expects to recognize a one-time cumulative effect adjustment to the allowance for loan losses as of the first reporting period in which the new standard is effective, but cannot yet estimate the magnitude of the one- time adjustment or the overall impact of the new guidance on the Company’s financial position, results of operations or cash flows. FASB issued ASU No. 2017-4, Intangibles-Goodwill and Other: Simplifying the Test for Goodwill Impairment (Topic 350): ASU 2017-4 eliminates step two of the goodwill impairment test (the hypothetical purchase price allocation used to determine the implied fair value of goodwill) when step one (determining if the carrying value of a reporting unit exceeds its fair value) is failed. Instead, entities simply will compare the fair value of a reporting unit to its carrying amount and record goodwill impairment for the amount by which the reporting unit’s carrying amount exceeds its fair value. ASU 2017-4 will be effective for the Company on January 1, 2020 and is not expected to have a significant impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. As ASU No. 2018-13 only revises disclosure requirements, it will not have a significant impact on the Company’s consolidated financial statements.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Schedule of Fair Value of Consideration Transferred, Identifiable Net Assets Acquired and Resulting Goodwill	The following table summarizes the consideration paid for FNBB and the amounts of assets acquired and liabilities assumed that were recorded at the acquisition date (in thousands). FNB Bancorp Fair value of consideration transferred: Fair value of shares issued $ 284,437 Cash consideration 6,695 Total fair value of consideration transferred 291,132 Assets acquired: Cash and cash equivalents 37,308 Securities available for sale 335,667 Restricted equity securities 7,723 Loans 834,683 Premises and equipment 30,522 Cash value of life insurance 16,817 Core deposit intangible 27,605 Other assets 16,214 Total assets acquired 1,306,539 Liabilities assumed: Deposits 991,935 Other liabilities 15,033 Short-term borrowings - Federal Home Loan Bank 165,000 Total liabilities assumed 1,171,968 Total net assets acquired 134,571 Goodwill recognized $ 156,561
Summary of Estimated Fair Value Adjustments Resulting in Goodwill	A summary of the estimated fair value adjustments resulting in the goodwill recorded in the FNB Bancorp acquisition are presented below (in thousands): FNB Bancorp Value of stock consideration paid to FNB Bancorp Shareholders $ 284,437 Cash consideration 6,695 Less: Cost basis net assets acquired 114,030 Fair value adjustments: Investments (1,081) Loans (22,390) Premises and equipment 21,590 Core deposit intangible 27,327 Deferred income taxes (6,394) Other 1,489 Goodwill $ 156,561

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Investments Schedule [Abstract]
Amortized Cost and Estimated Fair Values of Investments Securities	The amortized cost and estimated fair values of investments in debt securities are summarized in the following tables: September 30, 2019 Amortized Gross Gross Estimated (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 488,080 $ 8,004 $ (447) $ 495,637 Obligations of states and political subdivisions 108,360 3,550 — 111,910 Corporate bonds 4,420 108 — 4,528 Asset backed securities 376,683 192 (4,870) 372,005 Total debt securities available for sale $ 977,543 $ 11,854 $ (5,317) $ 984,080 Debt Securities Held to Maturity Obligations of U.S. government agencies $ 379,634 $ 6,382 $ (482) $ 385,534 Obligations of states and political subdivisions 13,815 350 — 14,165 Total debt securities held to maturity $ 393,449 $ 6,732 $ (482) $ 399,699 December 31, 2018 Amortized Gross Gross Estimated (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 647,288 $ 771 $ (18,078) $ 629,981 Obligations of states and political subdivisions 128,890 294 (3,112) 126,072 Corporate bonds 4,381 97 — 4,478 Asset backed securities 355,451 73 (1,019) 354,505 Total debt securities available for sale $ 1,136,010 $ 1,235 $ (22,209) $ 1,115,036 Debt Securities Held to Maturity Obligations of U.S. government agencies 430,343 327 (7,745) 422,925 Obligations of states and political subdivisions 14,593 82 (230) 14,445 Total debt securities held to maturity $ 444,936 $ 409 $ (7,975) $ 437,370
Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity	The amortized cost and estimated fair value of debt securities at September 30, 2019 by contractual maturity are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. At September 30, 2019, obligations of U.S. government corporations and agencies with a cost basis totaling $867,714,000 consist almost entirely of residential real estate mortgage-backed securities whose contractual maturity, or principal repayment, will follow the repayment of the underlying mortgages. For purposes of the following table, the entire outstanding balance of these mortgage-backed securities issued by U.S. government corporations and agencies is categorized based on final maturity date. At September 30, 2019, the Company estimates the average remaining life of these mortgage-backed securities issued by U.S. government corporations and agencies to be approximately 4.7 years. Average remaining life is defined as the time span after which the principal balance has been reduced by half. Debt Securities Available for Sale Held to Maturity (in thousands) Amortized Estimated Amortized Estimated Due in one year $ 2,607 $ 2,613 $ 1,263 $ 1,274 Due after one year through five years 14,986 15,401 — — Due after five years through ten years 46,263 47,273 20,747 21,035 Due after ten years 913,687 918,793 371,439 377,390 Totals $ 977,543 $ 984,080 $ 393,449 $ 399,699
Gross Unrealized Losses on Investment Securities	Gross unrealized losses on debt securities and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: Less than 12 months 12 months or more Total September 30, 2019: Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 38,295 $ (374) $ 25,171 $ (73) $ 63,466 $ (447) Asset backed securities 293,500 (4,432) 45,981 (438) 339,481 (4,870) Total debt securities available for sale $ 331,795 $ (4,806) $ 71,152 $ (511) $ 402,947 $ (5,317) Debt Securities Held to Maturity Obligations of U.S. government agencies $ 19,749 $ (94) $ 78,604 $ (388) $ 98,353 $ (482) Less than 12 months 12 months or more Total December 31, 2018: Fair Unrealized Fair Unrealized Fair Unrealized (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 171,309 $ (3,588) $ 394,630 $ (14,490) $ 565,939 $ (18,078) Obligations of states and political subdivisions 63,738 (1,541) 20,719 (1,571) 84,457 (3,112) Asset backed securities 101,386 (1,019) — — 101,386 (1,019) Total debt securities available for sale $ 336,433 $ (6,148) $ 415,349 $ (16,061) $ 751,782 $ (22,209) Debt Securities Held to Maturity Obligations of U.S. government agencies 223,810 (2,619) 158,648 (5,126) 382,458 (7,745) Obligations of states and political subdivisions 5,786 (114) 4,042 (116) 9,828 (230) Total debt securities held to maturity $ 229,596 $ (2,733) $ 162,690 $ (5,242) $ 392,286 $ (7,975)

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Summary of Loan Balances	A summary of loan balances follows: September 30, 2019 (in thousands) Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 family $ 355,646 $ 148,731 $ 1,417 $ 505,794 Commercial 2,109,309 626,924 5,129 2,741,362 Total mortgage loans on real estate 2,464,955 775,655 6,546 3,247,156 Consumer: Home equity lines of credit 294,411 36,635 826 331,872 Home equity loans 27,034 2,915 421 30,370 Other 64,153 16,142 2 80,297 Total consumer loans 385,598 55,692 1,249 442,539 Commercial 256,379 19,569 2,510 278,458 Construction: Residential 158,907 10,127 — 169,034 Commercial 44,704 457 — 45,161 Total construction loans 203,611 10,584 — 214,195 Total loans, net of deferred loan fees and discounts $ 3,310,543 $ 861,500 $ 10,305 $ 4,182,348 Total principal balance of loans owed, net of charge-offs $ 3,319,052 $ 892,608 $ 16,274 $ 4,227,934 Unamortized net deferred loan fees (8,509) — — (8,509) Discounts to principal balance of loans owed, net of charge-offs — (31,108) (5,969) (37,077) Total loans, net of unamortized deferred loan fees and discounts $ 3,310,543 $ 861,500 $ 10,305 $ 4,182,348 Allowance for loan losses $ (31,112) $ (419) $ (6) $ (31,537) December 31, 2018 (in thousands) Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 family $ 343,796 $ 169,792 $ 1,674 $ 515,262 Commercial 1,910,981 708,401 8,456 2,627,838 Total mortgage loans on real estate 2,254,777 878,193 10,130 3,143,100 Consumer: Home equity lines of credit 284,453 40,957 1,167 326,577 Home equity loans 32,660 3,585 439 36,684 Other 34,020 21,659 42 55,721 Total consumer loans 351,133 66,201 1,648 418,982 Commercial 228,635 45,468 2,445 276,548 Construction: Residential 90,703 30,593 — 121,296 Commercial 56,208 5,880 — 62,088 Total construction loans 146,911 36,473 — 183,384 Total loans, net of deferred loan fees and discounts $ 2,981,456 $ 1,026,335 $ 14,223 $ 4,022,014 Total principal balance of loans owed, net of charge-offs $ 2,991,324 $ 1,062,655 $ 21,265 $ 4,075,244 Unamortized net deferred loan fees (9,868) — — (9,868) Discounts to principal balance of loans owed, net of charge-offs — (36,320) (7,042) (43,362) Total loans, net of unamortized deferred loan fees and discounts $ 2,981,456 $ 1,026,335 $ 14,223 $ 4,022,014 Allowance for loan losses $ (31,793) $ (667) $ (122) $ (32,582)
Change in Accretable Yield for PCI	The following is a summary of the change in accretable yield for PCI during the periods indicated (in thousands): Three months ended September 30, Nine months ended September 30, 2019 2018 2019 2018 Change in accretable yield: Balance at beginning of period $ 5,318 $ 5,871 $ 6,059 $ 6,137 Accretion to interest income (292) (253) (702) (769) Reclassification from (to) nonaccretable difference 71 (47) (260) 203 Balance at end of period $ 5,097 $ 5,571 $ 5,097 $ 5,571

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Allowance For Loan And Lease Losses [Abstract]
Summary of Activity in Allowance for Loan Losses, and Ending Balance of Loans, Net of Unearned Fees for Periods Indicated	The following tables summarize the activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated. Allowance for Loan Losses – Three Months Ended September 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,576 $ — $ 48 $ (218) $ 2,406 Commercial 12,099 (746) 126 462 11,941 Total mortgage loans on real estate 14,675 (746) 174 244 14,347 Consumer: Home equity lines of credit 5,859 — 27 (152) 5,734 Home equity loans 1,242 (3) 156 (133) 1,262 Other 1,451 (188) 79 211 1,553 Total consumer loans 8,552 (191) 262 (74) 8,549 Commercial 6,745 (585) 84 (557) 5,687 Construction: Residential 2,538 — — 119 2,657 Commercial 358 — — (61) 297 Total construction loans 2,896 — — 58 2,954 Total $ 32,868 $ (1,522) $ 520 $ (329) $ 31,537 Allowance for Loan Losses – Nine months ended September 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,676 $ (2) $ 53 $ (321) $ 2,406 Commercial 12,944 (746) 1,517 (1,774) 11,941 Total mortgage loans on real estate 15,620 (748) 1,570 (2,095) 14,347 Consumer: Home equity lines of credit 6,042 — 305 (613) 5,734 Home equity loans 1,540 (3) 414 (689) 1,262 Other 793 (548) 262 1,046 1,553 Total consumer loans 8,375 (551) 981 (256) 8,549 Commercial 6,090 (1,242) 337 502 5,687 Construction: Residential 1,834 — — 823 2,657 Commercial 663 — — (366) 297 Total construction loans 2,497 — — 457 2,954 Total $ 32,582 $ (2,541) $ 2,888 $ (1,392) $ 31,537 Allowance for Loan Losses – As of September 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 family $ 2,315 $ 91 $ — $ 2,406 Commercial 11,915 26 — 11,941 Total mortgage loans on real estate 14,230 117 — 14,347 Consumer: Home equity lines of credit 5,644 84 6 5,734 Home equity loans 1,216 46 — 1,262 Other 1,535 18 — 1,553 Total consumer loans 8,395 148 6 8,549 Commercial 4,428 1,259 — 5,687 Construction: Residential 2,657 — — 2,657 Commercial 297 — — 297 Total construction loans 2,954 — — 2,954 Total $ 30,007 $ 1,524 $ 6 $ 31,537 Loans, Net of Unearned fees – As of September 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 family $ 499,620 $ 4,757 $ 1,417 $ 505,794 Commercial 2,727,228 9,005 5,129 2,741,362 Total mortgage loans on real estate 3,226,848 13,762 6,546 3,247,156 Consumer: Home equity lines of credit 329,129 1,917 826 331,872 Home equity loans 27,793 2,156 421 30,370 Other 80,146 149 2 80,297 Total consumer loans 437,068 4,222 1,249 442,539 Commercial 271,447 4,501 2,510 278,458 Construction: Residential 169,034 — — 169,034 Commercial 45,161 — — 45,161 Total construction loans 214,195 — — 214,195 Total $ 4,149,558 $ 22,485 $ 10,305 $ 4,182,348 Allowance for Loan Loses – Year Ended December 31, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,317 $ (77) $ — $ 436 $ 2,676 Commercial 11,441 (15) 68 1,450 12,944 Total mortgage loans on real estate 13,758 (92) 68 1,886 15,620 Consumer: Home equity lines of credit 5,800 (277) 846 (327) 6,042 Home equity loans 1,841 (24) 297 (574) 1,540 Other 586 (783) 288 702 793 Total consumer loans 8,227 (1,084) 1,431 (199) 8,375 Commercial 6,512 (1,188) 541 225 6,090 Construction: Residential 1,184 — — 650 1,834 Commercial 642 — — 21 663 Total construction loans 1,826 — — 671 2,497 Total $ 30,323 $ (2,364) $ 2,040 $ 2,583 $ 32,582 Allowance for Loan Losses – As of December 31, 2018 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 family $ 2,620 $ 56 $ — $ 2,676 Commercial 12,737 91 116 12,944 Total mortgage loans on real estate 15,357 147 116 15,620 Consumer: Home equity lines of credit 5,838 198 6 6,042 Home equity loans 1,486 54 — 1,540 Other 779 14 — 793 Total consumer loans 8,103 266 6 8,375 Commercial 4,309 1,781 — 6,090 Construction: Residential 1,834 — — 1,834 Commercial 663 — — 663 Total construction loans 2,497 — — 2,497 Total $ 30,266 $ 2,194 $ 122 $ 32,582 Loans , Net of Unearned fees - As of December 31, 2018 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 family $ 509,267 $ 4,321 $ 1,674 $ 515,262 Commercial 2,606,819 12,563 8,456 2,627,838 Total mortgage loans on real estate 3,116,086 16,884 10,130 3,143,100 Consumer: Home equity lines of credit 322,764 2,646 1,167 326,577 Home equity loans 33,142 3,103 439 36,684 Other 55,483 196 42 55,721 Total consumer loans 411,389 5,945 1,648 418,982 Commercial 268,885 5,218 2,445 276,548 Construction: Residential 121,296 — — 121,296 Commercial 62,088 — — 62,088 Total construction loans 183,384 — — 183,384 Total $ 3,979,744 $ 28,047 $ 14,223 $ 4,022,014 Allowance for Loan Losses – Three Months Ended September 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 1,991 $ (25) $ — $ 434 $ 2,400 Commercial 11,607 — 15 1,257 12,879 Total mortgage loans on real estate 13,598 (25) 15 1,691 15,279 Consumer: Home equity lines of credit 5,048 (172) 151 194 5,221 Home equity loans 1,532 (23) 139 (55) 1,593 Other 557 (229) 63 309 700 Total consumer loans 7,137 (424) 353 448 7,514 Commercial 6,378 (693) 202 337 6,224 Construction: Residential 1,434 — — 192 1,626 Commercial 977 — — (17) 960 Total construction loans 2,411 — — 175 2,586 Total $ 29,524 $ (1,142) $ 570 $ 2,651 $ 31,603 Allowance for Loan Losses – Nine months ended September 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 family $ 2,317 $ (77) $ — $ 160 $ 2,400 Commercial 11,441 (15) 51 1,402 12,879 Total mortgage loans on real estate 13,758 (92) 51 1,562 15,279 Consumer: Home equity lines of credit 5,800 (276) 677 (980) 5,221 Home equity loans 1,841 (23) 176 (401) 1,593 Other 586 (597) 208 503 700 Total consumer loans 8,227 (896) 1,061 (878) 7,514 Commercial 6,512 (952) 331 333 6,224 Construction: Residential 1,184 — — 442 1,626 Commercial 642 — — 318 960 Total construction loans 1,826 — — 760 2,586 Total $ 30,323 $ (1,940) $ 1,443 $ 1,777 $ 31,603 Allowance for Loan Losses – As of September 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 family $ 2,313 $ 57 $ 30 $ 2,400 Commercial 12,552 268 59 12,879 Total mortgage loans on real estate 14,865 325 89 15,279 Consumer: Home equity lines of credit 5,046 168 7 5,221 Home equity loans 1,418 175 — 1,593 Other 597 103 — 700 Total consumer loans 7,061 446 7 7,514 Commercial 4,353 1,857 14 6,224 Construction: Residential 1,626 — — 1,626 Commercial 960 — — 960 Total construction loans 2,586 — — 2,586 Total $ 28,865 $ 2,628 $ 110 $ 31,603 Loans, Net of Unearned fees – As of September 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 family $ 517,935 $ 4,781 $ 1,698 $ 524,414 Commercial 2,586,659 13,244 7,885 2,607,788 Total mortgage loans on real estate 3,104,594 18,025 9,583 3,132,202 Consumer: Home equity lines of credit 327,649 2,188 1,299 331,136 Home equity loans 37,840 2,406 447 40,693 Other 49,171 243 42 49,456 Total consumer loans 414,660 4,837 1,788 421,285 Commercial 282,588 4,632 2,427 289,647 Construction: Residential 114,574 — — 114,574 Commercial 69,728 — — 69,728 Total construction loans 184,302 — — 184,302 Total $ 3,986,144 $ 27,494 $ 13,798 $ 4,027,436
Schedule Credit Quality Indicators	The following tables present ending loan balances by loan category and risk grade for the periods indicated: Credit Quality Indicators Originated Loans – As of September 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total Originated Mortgage loans on real estate: Residential 1-4 family $ 348,668 $ 2,743 $ 4,235 $ — $ 355,646 Commercial 2,063,991 38,150 7,168 — 2,109,309 Total mortgage loans on real estate 2,412,659 40,893 11,403 — 2,464,955 Consumer: Home equity lines of credit 288,554 3,378 2,479 — 294,411 Home equity loans 23,819 1,184 2,031 — 27,034 Other 63,648 452 53 — 64,153 Total consumer loans 376,021 5,014 4,563 — 385,598 Commercial 242,308 8,968 5,103 256,379 Construction: Residential 158,657 — 250 — 158,907 Commercial 44,380 324 — — 44,704 Total construction loans 203,037 324 250 — 203,611 Total loans $ 3,234,025 $ 55,199 $ 21,319 $ — $ 3,310,543 Credit Quality Indicators PNCI Loans – As of September 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total PNCI Mortgage loans on real estate: Residential 1-4 family $ 145,141 $ 1,617 $ 1,973 $ — $ 148,731 Commercial 618,372 2,674 5,878 — 626,924 Total mortgage loans on real estate 763,513 4,291 7,851 — 775,655 Consumer: Home equity lines of credit 34,660 891 1,084 — 36,635 Home equity loans 2,841 — 74 — 2,915 Other 15,792 341 9 — 16,142 Total consumer loans 53,293 1,232 1,167 — 55,692 Commercial 19,399 1 169 19,569 Construction: Residential 5,980 4,147 — — 10,127 Commercial 457 — — — 457 Total construction loans 6,437 4,147 — — 10,584 Total loans $ 842,642 $ 9,671 $ 9,187 $ — $ 861,500 Credit Quality Indicators Originated Loans – As of December 31, 2018 (in thousands) Pass Special Substandard Doubtful / Loss Total Originated Mortgage loans on real estate: Residential 1-4 family $ 337,189 $ 1,724 $ 4,883 $ — $ 343,796 Commercial 1,861,627 33,483 15,871 — 1,910,981 Total mortgage loans on real estate 2,198,816 35,207 20,754 — 2,254,777 Consumer: Home equity lines of credit 279,491 2,309 2,653 — 284,453 Home equity loans 29,289 1,054 2,317 — 32,660 Other 33,606 341 73 — 34,020 Total consumer loans 342,386 3,704 5,043 — 351,133 Commercial 217,126 6,127 5,382 — 228,635 Construction: Residential 90,412 32 259 — 90,703 Commercial 55,863 345 — — 56,208 Total construction loans 146,275 377 259 — 146,911 Total loans $ 2,904,603 $ 45,415 $ 31,438 $ — $ 2,981,456 Credit Quality Indicators PNCI Loans – As of December 31, 2018 (in thousands) Pass Special Substandard Doubtful / Loss Total PNCI Mortgage loans on real estate: Residential 1-4 family $ 167,908 $ 1,086 $ 798 $ — $ 169,792 Commercial 701,868 3,085 3,448 — 708,401 Total mortgage loans on real estate 869,776 4,171 4,246 — 878,193 Consumer: Home equity lines of credit 38,780 1,124 1,053 — 40,957 Home equity loans 3,413 74 98 — 3,585 Other 21,481 173 5 — 21,659 Total consumer loans 63,674 1,371 1,156 — 66,201 Commercial 45,027 321 120 — 45,468 Construction: Residential 30,593 — — — 30,593 Commercial 5,880 — — — 5,880 Total construction loans 36,473 — — — 36,473 Total $ 1,014,950 $ 5,863 $ 5,522 $ — $ 1,026,335
Analysis of Past Due Loans	The following table shows the ending balance of current and past due originated loans by loan category as of the date indicated: Analysis of Originated Past Due Loans - As of September 30, 2019 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ 289 $ 66 $ 1,187 $ 1,542 $ 354,104 $ 355,646 $ — Commercial 117 48 — 165 2,109,144 2,109,309 — Total mortgage loans on real estate 406 114 1,187 1,707 2,463,248 2,464,955 — Consumer: Home equity lines of credit 890 282 624 1,796 292,615 294,411 — Home equity loans 253 105 137 495 26,539 27,034 6 Other 134 138 4 276 63,877 64,153 — Total consumer loans 1,277 525 765 2,567 383,031 385,598 6 Commercial 955 227 272 1,454 254,925 256,379 30 Construction: Residential — — — — 158,907 158,907 — Commercial — — — — 44,704 44,704 — Total construction loans — — — — 203,611 203,611 — Total originated loans $ 2,638 $ 866 $ 2,224 $ 5,728 $ 3,304,815 $ 3,310,543 $ 36 The following table shows the ending balance of current and past due PNCI loans by loan category as of the date indicated: Analysis of PNCI Past Due Loans - As of September 30, 2019 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ — $ 52 $ 243 $ 295 $ 148,436 $ 148,731 $ — Commercial — — 949 949 625,975 626,924 — Total mortgage loans on real estate — 52 1,192 1,244 774,411 775,655 — Consumer: Home equity lines of credit 182 122 — 304 36,331 36,635 — Home equity loans — 14 232 246 2,669 2,915 — Other 54 7 — 61 16,081 16,142 — Total consumer loans 236 143 232 611 55,081 55,692 — Commercial — — 174 174 19,395 19,569 — Construction: Residential — — — — 10,127 10,127 — Commercial — — — — 457 457 — Total construction loans — — — — 10,584 10,584 — Total PNCI loans $ 236 $ 195 $ 1,598 $ 2,029 $ 859,471 $ 861,500 $ — The following table shows the ending balance of current and past due originated loans by loan category as of the date indicated: Analysis of Originated Past Due Loans - As of December 31, 2018 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ 1,675 $ 132 $ 478 $ 2,285 $ 341,511 $ 343,796 $ — Commercial 431 1,200 296 1,927 1,909,054 1,910,981 — Total mortgage loans on real estate 2,106 1,332 774 4,212 2,250,565 2,254,777 — Consumer: Home equity lines of credit 908 47 609 1,564 282,889 284,453 — Home equity loans 1,043 24 214 1,281 31,379 32,660 — Other 298 17 — 315 33,705 34,020 — Total consumer loans 2,249 88 823 3,160 347,973 351,133 — Commercial 1,053 579 1,247 2,879 225,756 228,635 — Construction: Residential 209 — — 209 90,494 90,703 — Commercial — — — — 56,208 56,208 — Total construction loans 209 — — 209 146,702 146,911 — Total loans $ 5,617 $ 1,999 $ 2,844 $ 10,460 $ 2,970,996 $ 2,981,456 $ — The following table shows the ending balance of current and past due PNCI loans by loan category as of the date indicated: Analysis of PNCI Past Due Loans - As of December 31, 2018 (in thousands) 30-59 days 60-89 days > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 family $ 1,009 $ 133 $ 156 $ 1,298 $ 168,494 $ 169,792 $ — Commercial 1,646 1,136 1,082 3,864 704,537 708,401 — Total mortgage loans on real estate 2,655 1,269 1,238 5,162 873,031 878,193 — Consumer: Home equity lines of credit 304 35 237 576 40,381 40,957 — Home equity loans 74 — — 74 3,511 3,585 — Other 160 — — 160 21,499 21,659 — Total consumer loans 538 35 237 810 65,391 66,201 — Commercial 678 145 113 936 44,532 45,468 — Construction: Residential — — — — 30,593 30,593 — Commercial — — — — 5,880 5,880 — Total construction loans — — — — 36,473 36,473 — Total loans $ 3,871 $ 1,449 $ 1,588 $ 6,908 $ 1,019,427 $ 1,026,335 $ —
Schedule of Non Accrual Loans	Interest income on originated nonaccrual loans that would have been recognized during the nine months ended September 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $692,000 and $964,000, respectively. Interest income actually recognized on these originated loans during the nine months ended September 30, 2019 and 2018 was $145,000 and $133,000, respectively. Interest income on PNCI nonaccrual loans that would have been recognized during the nine months ended September 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $322,000 and $93,000, respectively. Interest income actually recognized on these PNCI loans during the nine months ended September 30, 2019 and 2018 was $152,000 and $23,000. The following table shows the ending balance of nonaccrual originated and PNCI loans by loan category as of the date indicated: Non Accrual Loans As of September 30, 2019 As of December 31, 2018 (in thousands) Originated PNCI Total Originated PNCI Total Mortgage loans on real estate: Residential 1-4 family $ 2,820 $ 908 $ 3,728 $ 3,244 $ 334 $ 3,578 Commercial 2,532 3,253 5,785 9,263 1,468 10,731 Total mortgage loans on real estate 5,352 4,161 9,513 12,507 1,802 14,309 Consumer: Home equity lines of credit 1,188 426 1,614 1,429 885 2,314 Home equity loans 1,405 263 1,668 1,722 47 1,769 Other 90 3 93 3 4 7 Total consumer loans 2,683 692 3,375 3,154 936 4,090 Commercial 3,225 174 3,399 3,755 120 3,875 Construction: Residential — — — — — — Commercial — — — — — — Total construction — — — — — — Total non accrual loans $ 11,260 $ 5,027 $ 16,287 $ 19,416 $ 2,858 $ 22,274
Impaired Loans	Impaired Originated Loans – As of, or for the Nine months ended September 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 4,461 $ 3,053 $ 796 $ 3,849 $ 91 $ 4,214 $ 32 Commercial 6,006 4,423 1,329 5,752 26 9,096 59 Total mortgage loans on real estate 10,467 7,476 2,125 9,601 117 13,310 91 Consumer: Home equity lines of credit 1,279 1,232 — 1,232 — 1,662 26 Home equity loans 2,157 1,542 238 1,780 46 1,973 5 Other 74 3 51 54 14 46 1 Total consumer loans 3,510 2,777 289 3,066 60 3,681 32 Commercial 4,760 611 3,716 4,327 1,199 4,769 22 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 18,737 $ 10,864 $ 6,130 $ 16,994 $ 1,376 $ 21,760 $ 145 Impaired PNCI Loans – As of, or for the Nine months ended September 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 959 $ 908 $ — $ 908 $ — $ 621 $ 9 Commercial 3,255 3,253 — 3,253 — 2,360 134 Total mortgage loans on real estate 4,214 4,161 — 4,161 — 2,981 143 Consumer: Home equity lines of credit 741 444 241 685 84 844 — Home equity loans 395 376 — 376 — 308 9 Other 95 72 23 95 4 103 — Total consumer loans 1,231 892 264 1,156 88 1,255 9 Commercial 181 113 60 173 60 147 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 5,626 $ 5,166 $ 324 $ 5,490 $ 148 $ 4,383 $ 152 Impaired Originated Loans – As of, or for the Twelve Months Ended, December 31, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 4,594 $ 3,663 $ 308 $ 3,971 $ 56 $ 3,517 $ 90 Commercial 13,081 10,676 1,765 12,441 42 13,115 137 Total mortgage loans on real estate 17,675 14,339 2,073 16,412 98 16,632 227 Consumer: Home equity lines of credit 1,900 1,749 111 1,860 71 1,885 43 Home equity loans 2,374 1,892 65 1,957 2 1,520 23 Other 3 — 3 3 3 17 2 Total consumer loans 4,277 3,641 179 3,820 76 3,422 68 Commercial 5,433 2,924 2,287 5,211 1,774 4,654 91 Construction: Residential — — — — — 5 — Commercial — — — — — — — Total construction loans — — — — — 5 — Total $ 27,385 $ 20,904 $ 4,539 $ 25,443 $ 1,948 $ 24,713 $ 386 Impaired PNCI Loans – As of, or for the Twelve Months Ended, December 31, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 375 $ 334 $ — $ 334 $ — $ 529 $ 5 Commercial 3,110 1,468 — 1,468 — 1,713 183 Total mortgage loans on real estate 3,485 1,802 — 1,802 — 2,242 188 Consumer: Home equity lines of credit 1,027 587 367 954 127 1,120 18 Home equity loans 252 47 197 244 101 155 — Other 106 21 85 106 11 114 — Total consumer loans 1,385 655 649 1,304 239 1,389 18 Commercial 120 113 7 120 7 60 1 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 4,990 $ 2,570 $ 656 $ 3,226 $ 246 $ 3,691 $ 207 Impaired Originated Loans – As of, or for the Nine months ended September 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 4,185 $ 3,251 $ 311 $ 3,562 $ 57 $ 3,883 $ 67 Commercial 12,553 9,619 2,370 11,989 268 11,549 208 Total mortgage loans on real estate 16,738 12,870 2,681 15,551 325 15,432 275 Consumer: Home equity lines of credit 1,444 1,346 59 1,405 19 1,410 32 Home equity loans 2,554 1,960 157 2,117 30 1,753 24 Other 3 — 3 3 3 3 — Total consumer loans 4,001 3,306 219 3,525 52 3,166 56 Commercial 4,868 2,135 2,497 4,632 1,857 4,626 78 Construction: Residential — — — — — 68 — Commercial — — — — — — — Total construction loans — — — — — 68 — Total $ 25,607 $ 18,311 $ 5,397 $ 23,708 $ 2,234 $ 23,292 $ 409 Impaired PNCI Loans – As of, or for the Nine months ended September 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 family $ 1,302 $ 1,219 $ — $ 1,219 $ — $ 1,275 $ — Commercial 1,255 1,255 — 1,255 — 627 58 Total mortgage loans on real estate 2,557 2,474 — 2,474 — 1,902 58 Consumer: Home equity lines of credit 852 625 158 783 149 909 13 Home equity loans 296 50 239 289 145 287 9 Other 240 — 240 240 100 257 7 Total consumer loans 1,388 675 637 1,312 394 1,453 29 Commercial — — — — — — — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total $ 3,945 $ 3,149 $ 637 $ 3,786 $ 394 $ 3,355 $ 87
Troubled Debt Restructurings	The following tables show certain information regarding TDRs that occurred during the periods indicated: TDR Information for the three months ended September 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 family 2 $ 496 $ 500 $ 30 — $ — $ — Commercial 2 60 67 — — — — Total mortgage loans on real estate 4 556 567 30 — — — Consumer: Home equity lines of credit — — — — — — — Home equity loans — — — — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial 4 150 148 (2) — — — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total 4 $ 706 $ 715 $ 28 — $ — $ — TDR Information for the nine months ended September 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 family 3 $ 659 $ 662 $ 30 $ — $ — $ — Commercial 2 60 67 — — — — Total mortgage loans on real estate 5 719 729 30 — — — Consumer: Home equity lines of credit 1 65 68 — — — — Home equity loans 2 149 147 29 — — — Other — — — — — — — Total consumer loans 3 214 215 29 — — — Commercial 10 1,918 1,885 — 1 7 — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total 18 $ 2,851 $ 2,829 $ 59 $ 1 $ 7 $ — TDR Information for the three months ended September 30, 2018 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 family — $ — $ — $ — $ — $ — $ — Commercial 4 1,326 1,324 (308) — — — Total mortgage loans on real estate 4 1,326 1,324 (308) — — — Consumer: Home equity lines of credit — — — — 1 128 — Home equity loans 1 478 478 — — — — Other — — — — — — — Total consumer loans 1 478 478 — 1 128 — Commercial 2 203 203 — — — — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total 7 $ 2,007 $ 2,005 $ (308) $ 1 $ 128 $ — TDR Information for the nine months ended September 30, 2018 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 family — $ — $ — $ — $ — $ — $ — Commercial 6 1,743 1,741 (262) 1 169 — Total mortgage loans on real estate 6 1,743 1,741 (262) 1 169 — Consumer: Home equity lines of credit 1 133 138 — 1 128 — Home equity loans 2 599 599 — — — — Other — — — — — — — Total consumer loans 3 732 737 — 1 128 — Commercial 4 619 623 (3) 4 340 (2) Construction: Residential — — — — — — — Commercial — — — — — — — Total construction loans — — — — — — — Total 13 $ 3,094 $ 3,101 $ (265) $ 6 $ 637 $ (2)

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lease Cost and Other Lease Information	The following table presents the components of lease expense for the three and nine months ended September 30, 2019: (in thousands) Three months ended Nine months ended Operating lease cost $ 1,306 $ 3,924 Short-term lease cost 65 194 Variable lease cost (13) (33) Sublease income (32) (98) Total lease cost $ 1,326 $ 3,987
Schedule Of Supplemental Cash Flow Information Related To Operating Leases	(in thousands) Three months ended Nine months ended Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,236 $ 3,683 ROUA obtained in exchange for operating lease liabilities $ — $ 32,162
Schedule Of Weighted Average Lease Term And Discount Rate Related To Operating Lease	The following table presents the weighted average operating lease term and discount rate at September 30, 2019: Weighted-average remaining lease term 9.4 years Weighted-average discount rate 3.19 %
Lessee, Operating Lease, Liability, Maturity	At September 30, 2019, future expected operating lease payments are as follows: (in thousands) Periods ending December 31, 2019 $ 1,180 2020 4,389 2021 4,235 2022 3,896 2023 3,216 Thereafter 16,682 33,598 Discount for present value of expected cash flows (5,104) Lease liability at September 30, 2019 $ 28,494

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2019
Deposits [Abstract]
Summary of Balances of Deposits	A summary of the balances of deposits follows (in thousands): September 30, December 31, Noninterest-bearing demand $ 1,777,357 $ 1,760,580 Interest-bearing demand 1,222,955 1,252,366 Savings 1,843,873 1,921,324 Time certificates, $250,000 or more 148,449 132,429 Other time certificates 302,773 299,767 Total deposits $ 5,295,407 $ 5,366,466

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Summary of Bank's Commitments and Contingent Liabilities	The following table presents a summary of the Bank’s commitments and contingent liabilities: (in thousands) September 30, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 325,681 $ 306,191 Consumer loans 512,345 496,575 Real estate mortgage loans 189,700 140,292 Real estate construction loans 182,701 248,996 Standby letters of credit 12,368 11,346 Deposit account overdraft privilege 111,187 111,956

Stock Options and Other Equit_2

Stock Options and Other Equity-Based Incentive Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Stock Option Activity	Stock option activity during the nine months ended September 30, 2019 is summarized in the following table: Number Option Price Weighted Outstanding at December 31, 2018 343,000 $12.63 to $23.21 $ 16.67 Options granted — — to — — Options exercised (166,000) $12.63 to $19.46 15.93 Options forfeited — — to — — Outstanding at September 30, 2019 177,000 $14.54 to $23.21 $ 17.52
Summary of Options Outstanding	The following table shows the number, weighted-average exercise price, intrinsic value, and weighted average remaining contractual life of options exercisable, options not yet exercisable and total options outstanding as of September 30, 2019: Currently Currently Not Total Number of options 176,625 375 177,000 Weighted average exercise price $ 17.50 $ 23.21 $ 17.52 Intrinsic value (in thousands) $ 3,321 $ 5 $ 3,326 Weighted average remaining contractual term (yrs.) 2.9 5.0 2.9
Restricted Stock Unit (RSU) Activity	The 375 options that are currently not exercisable as of September 30, 2019 are expected to vest, on a weighted-average basis, over the next three months. The Company did not modify any option grants during 2018 or the nine months ended September 30, 2019. Service Market Plus Outstanding at December 31, 2018 66,947 45,536 RSUs granted 35,272 22,898 RSUs added through dividend and performance credits 946 7,414 RSUs released (30,461) (22,237) RSUs forfeited/expired (1,876) (2,299) Outstanding at September 30, 2019 70,828 51,312

Noninterest Income and Expense

Noninterest Income and Expense (Tables)	9 Months Ended
	Sep. 30, 2019
Other Income and Expenses [Abstract]
Components of Other Noninterest Income	The following table summarizes the Company’s non-interest income for the periods indicated: Three months ended Nine months ended September 30, (dollars in thousands) 2019 2018 2019 2018 ATM and interchange fees $ 5,427 $ 4,590 $ 15,412 $ 13,335 Service charges on deposit accounts 4,327 4,015 12,389 11,407 Other service fees 808 676 2,198 2,020 Mortgage banking service fees 483 499 1,441 1,527 Change in value of mortgage servicing rights (455) (37) (1,652) 38 Total service charges and fees 10,590 9,743 29,788 28,327 Increase in cash value of life insurance 773 732 2,294 1,996 Asset management and commission income 721 728 2,102 2,414 Gain on sale of loans 1,236 539 2,223 1,831 Lease brokerage income 172 186 631 514 Sale of customer checks 126 88 401 327 Gain on sale of investment securities 107 207 107 207 Gain (loss) on marketable equity securities 22 (22) 100 (92) Other 361 135 1,688 942 Total other non-interest income 3,518 2,593 9,546 8,139 Total non-interest income $ 14,108 $ 12,336 $ 39,334 $ 36,466
Components of Noninterest Expense	The components of non-interest expense were as follows (in thousands): Three months ended Nine months ended September 30, 2019 2018 2019 2018 Base salaries, net of deferred loan origination costs $ 17,656 $ 15,685 $ 51,624 $ 44,076 Incentive compensation 3,791 4,515 10,064 9,126 Benefits and other compensation costs 5,452 5,623 17,058 15,726 Total salaries and benefits expense 26,899 25,823 78,746 68,928 Occupancy 3,711 3,173 11,223 8,574 Data processing and software 3,411 2,786 10,114 7,979 Equipment 1,679 1,750 5,298 4,938 Intangible amortization 1,431 1,390 4,293 2,068 Advertising 1,358 1,341 4,222 3,214 ATM and POS network charges 1,343 1,197 3,936 3,860 Professional fees 999 1,352 2,895 2,898 Telecommunications 867 819 2,437 2,201 Regulatory assessments and insurance 94 537 1,095 1,384 Merger and acquisition expense — 4,150 — 5,227 Postage 438 275 1,063 934 Operational losses 228 217 679 763 Courier service 357 278 1,039 769 Gain on sale of foreclosed assets (50) (2) (246) (390) Loss on disposal of fixed assets 2 152 82 206 Other miscellaneous expense 3,577 2,290 11,617 9,673 Total other non-interest expense 19,445 21,705 59,747 54,298 Total non-interest expense $ 46,344 $ 47,528 $ 138,493 $ 123,226

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Potential common shares that may be issued by the Company relate to outstanding stock options and restricted stock units (RSUs), and are determined using the treasury stock method. Earnings per share have been computed based on the following: Three months ended (in thousands) 2019 2018 Net income $ 23,395 $ 16,170 Average number of common shares outstanding 30,509 30,011 Effect of dilutive stock options and restricted stock 120 280 Average number of common shares outstanding used to calculate diluted earnings 30,629 30,291 Options excluded from diluted earnings per share because the effect of these 42 10 Nine months ended (in thousands) 2019 2018 Net income $ 69,182 $ 45,109 Average number of common shares outstanding 30,464 25,317 Effect of dilutive stock options and restricted stock 179 300 Average number of common shares outstanding used to calculate diluted earnings 30,643 25,617 Options excluded from diluted earnings per share because the effect of these 42 10

Comprehensive Income (Tables)

Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Components of Other Comprehensive Income (Loss) and Related Tax Effects	The components of accumulated other comprehensive income (loss), included in shareholders’ equity, are as follows: (in thousands) September 30, December 31, Net unrealized gain (loss) on available for sale securities $ 6,537 $ (20,974) Tax effect (1,932) 6,201 Unrealized holding gain (loss) on available for sale securities, net of tax 4,605 (14,773) Unfunded status of the supplemental retirement plans (4,802) (4,802) Tax effect 1,420 1,420 Unfunded status of the supplemental retirement plans, net of tax (3,382) (3,382) Joint beneficiary agreement liability 276 276 Tax effect — — Joint beneficiary agreement liability, net of tax 276 276 Accumulated other comprehensive gain (loss) $ 1,499 $ (17,879)
Components of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive income (loss), included in shareholders’ equity, are as follows: (in thousands) September 30, December 31, Net unrealized gain (loss) on available for sale securities $ 6,537 $ (20,974) Tax effect (1,932) 6,201 Unrealized holding gain (loss) on available for sale securities, net of tax 4,605 (14,773) Unfunded status of the supplemental retirement plans (4,802) (4,802) Tax effect 1,420 1,420 Unfunded status of the supplemental retirement plans, net of tax (3,382) (3,382) Joint beneficiary agreement liability 276 276 Tax effect — — Joint beneficiary agreement liability, net of tax 276 276 Accumulated other comprehensive gain (loss) $ 1,499 $ (17,879)

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis	The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis (in thousands): Fair value at September 30, 2019 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,974 $ 2,974 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 495,637 — 495,637 — Obligations of states and political subdivisions 111,910 — 111,910 — Corporate bonds 4,528 — 4,528 — Asset backed securities 372,005 — 372,005 — Loans held for sale 7,604 — 7,604 — Mortgage servicing rights 6,072 — — 6,072 Total assets measured at fair value $ 1,000,730 $ 2,974 $ 991,684 $ 6,072 Fair value at December 31, 2018 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,874 $ 2,874 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 629,981 — 629,981 — Obligations of states and political subdivisions 126,072 — 126,072 — Corporate bonds 4,478 — 4,478 — Asset backed securities 354,505 — 354,505 — Loans held for sale 3,687 — 3,687 — Mortgage servicing rights 7,098 — — 7,098 Total assets measured at fair value $ 1,128,695 $ 2,874 $ 1,118,723 $ 7,098
Reconciliation of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) on Recurring Basis	The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the time periods indicated. Had there been any transfer into or out of Level 3 during the time periods indicated, the amount included in the “Transfers into (out of) Level 3” column would represent the beginning balance of an item in the period (interim quarter) during which it was transferred (in thousands): Three months ended September 30, Beginning Transfers Change Issuances Ending 2019: Mortgage servicing rights $ 6,229 — $ (455) $ 298 $ 6,072 2018: Mortgage servicing rights $ 7,021 — $ (37) $ 138 $ 7,122 Nine months ended September 30, Beginning Transfers Change Issuances Ending 2019: Mortgage servicing rights $ 7,098 — $ (1,652) $ 626 $ 6,072 2018: Mortgage servicing rights $ 6,687 — $ 38 $ 397 $ 7,122
Quantitative Information about Recurring Level 3 Fair Value Measurements	The following table presents quantitative information about recurring Level 3 fair value measurements at September 30, 2019 and December 31, 2018: As of September 30, 2019: Fair Value Valuation Unobservable Range, Mortgage Servicing Rights $ 6,072 Discounted cash flow Constant prepayment rate 7% - 42%; 11% Discount rate 10% - 14%; 12% As of December 31, 2018: Mortgage Servicing Rights $ 7,098 Discounted cash flow Constant prepayment rate 5% - 27.3%; 7.6% Discount rate 12% - 13%; 12%
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	The tables below present the recorded investment in assets and liabilities measured at fair value on a nonrecurring basis, as of the dates indicated (in thousands): September 30, 2019 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 1,055 — — $ 1,055 $ (652) Foreclosed assets 417 — — 417 (27) Total assets measured at fair value $ 1,472 — — $ 1,472 $ (679) December 31, 2018 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 281 — — $ 281 $ (294) Foreclosed assets 1,311 — — 1,311 (8) Total assets measured at fair value $ 1,592 — — $ 1,592 $ (302) September 30, 2018 Total Level 1 Level 2 Level 3 Total Gains Fair value: Impaired Originated & PNCI loans $ 445 — — $ 445 $ (808) Foreclosed assets 863 — — 863 (23) Total assets measured at fair value $ 1,308 — — $ 1,308 $ (831)
Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on Nonrecurring Basis	The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at September 30, 2019: September 30, 2019 Fair Value Valuation Unobservable Inputs Range, Impaired Originated & PNCI loans $ 1,055 Sales comparison Adjustment for differences between Not meaningful Foreclosed assets (Residential real estate) $ 417 Sales comparison Adjustment for differences between Not meaningful The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis at December 31, 2018: December 31, 2018 Fair Value Valuation Unobservable Inputs Range, Impaired Originated & PNCI loans $ 281 Sales comparison Adjustment for differences between (16.30)% - 35.14%; 10.45% N/A Foreclosed assets (Residential real estate) $ 693 Sales comparison Adjustment for differences between (21.83)% - 7.25%; (3.75)% Foreclosed assets (Commercial real estate) $ 618 Sales comparison Adjustment for differences between (65)% - 20%; (45)%
Estimated Fair Values of Financial Instruments that are Reported at Amortized Cost in Consolidated Balance Sheets	September 30, 2019 December 31, 2018 (in thousands) Carrying Fair Carrying Fair Financial assets: Level 1 inputs: Cash and due from banks $ 118,960 $ 118,960 $ 119,781 $ 119,781 Cash at Federal Reserve and other banks 140,087 140,087 107,752 107,752 Level 2 inputs: Securities held to maturity 393,449 399,699 444,936 437,370 Restricted equity securities 17,250 N/A 17,250 N/A Loans held for sale 7,604 7,604 3,687 4,616 Level 3 inputs: Loans, net 4,150,811 4,137,528 3,989,432 4,006,986 Financial liabilities: Level 2 inputs: Deposits 5,295,407 5,294,348 5,366,466 5,362,173 Other borrowings 16,423 16,423 15,839 15,839 Level 3 inputs: Junior subordinated debt 57,180 56,209 57,042 62,610 (in thouands) Contract Fair Contract Fair Off-balance sheet: Level 3 inputs: Commitments $ 1,210,427 $ 12,104 $ 1,192,054 $ 11,921 Standby letters of credit 12,368 124 11,346 113 Overdraft privilege commitments 111,187 1,112 111,956 1,120

Fair Value Measurement - Reconc

Fair Value Measurement - Reconciliation of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) on Recurring Basis (Detail) - Mortgage Servicing Rights - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 6,229	$ 7,021	$ 7,098	$ 6,687
Change Included in Earnings	(455)	(37)	(1,652)	38
Issuances	298	138	626	397
Ending Balance	$ 6,072	$ 7,122	$ 6,072	$ 7,122

Fair Value Measurement - Quanti

Fair Value Measurement - Quantitative Information about Recurring Level 3 Fair Value Measurements (Detail) - Mortgage Servicing Rights $ in Thousands	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgages Servicing Rights, Fair Value	$ 6,072	$ 7,098
Minimum | Valuation Technique, Discounted Cash Flow | Measurement Input, Constant Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	0.07	0.05
Minimum | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	0.10	0.12
Maximum | Valuation Technique, Discounted Cash Flow | Measurement Input, Constant Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	0.42	0.273
Maximum | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	0.14	0.13
Weighted Average | Valuation Technique, Discounted Cash Flow | Measurement Input, Constant Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	0.11	0.076
Weighted Average | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	0.12	0.12

Fair Value Measurement - Quan_2

Fair Value Measurement - Quantitative Information about (Level 3) Fair Value Measurements for Financial Instruments Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Impaired Originated & PNCI Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,055	$ 281
Foreclosed Assets | Residential Real Estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 417	693
Foreclosed Assets | Commercial Real Estate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 618
Level 3 | Sales Comparison Approach | Minimum | Impaired Originated & PNCI Loans | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(16.30%)
Level 3 | Sales Comparison Approach | Minimum | Foreclosed Assets | Residential Real Estate | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(21.83%)
Level 3 | Sales Comparison Approach | Minimum | Foreclosed Assets | Commercial Real Estate | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(65.00%)
Level 3 | Sales Comparison Approach | Maximum | Impaired Originated & PNCI Loans | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		35.14%
Level 3 | Sales Comparison Approach | Maximum | Foreclosed Assets | Residential Real Estate | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		7.25%
Level 3 | Sales Comparison Approach | Maximum | Foreclosed Assets | Commercial Real Estate | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		20.00%
Level 3 | Sales Comparison Approach | Weighted Average | Impaired Originated & PNCI Loans | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		10.45%
Level 3 | Sales Comparison Approach | Weighted Average | Foreclosed Assets | Residential Real Estate | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(3.75%)
Level 3 | Sales Comparison Approach | Weighted Average | Foreclosed Assets | Commercial Real Estate | Adjustment for Differences between Comparable Sales
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(45.00%)

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2019
Banking and Thrift [Abstract]
Actual and Required Capital Ratios of Bank	The following tables present actual and required capital ratios as of September 30, 2019 and December 31, 2018 for the Company and the Bank under applicable Basel III Capital Rules. The minimum capital amounts presented include the minimum required capital levels as of September 30, 2019 and December 31, 2018 based on the then phased-in provisions of the Basel III Capital Rules. As of January 1, 2019, the minimum required capital levels of the Basel III Capital Rules have been fully phased-in. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules. Actual Minimum Capital Required to be As of September 30, 2019: Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 735,884 15.23 % $ 507,335 10.50 % N/A N/A Tri Counties Bank $ 731,359 15.14 % $ 507,152 10.50 % $ 483,002 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 701,703 14.52 % $ 410,700 8.50 % N/A N/A Tri Counties Bank $ 697,178 14.43 % $ 410,551 8.50 % $ 386,401 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 646,240 13.37 % $ 338,224 7.00 % N/A N/A Tri Counties Bank $ 697,178 14.43 % $ 338,101 7.00 % $ 313,951 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 701,703 11.31 % $ 248,073 4.00 % N/A N/A Tri Counties Bank $ 697,178 11.24 % $ 248,068 4.00 % $ 310,085 5.00 % Actual Minimum Capital Minimum Capital Required to be As of December 31, 2018: Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total Capital (to Risk Weighted Assets): Consolidated $ 682,419 14.40 % $ 467,874 9.875 % $ 497,486 10.50 % N/A N/A Tri Counties Bank $ 680,624 14.37 % $ 467,704 9.875 % $ 497,305 10.50 % $ 473,624 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 647,262 13.66 % $ 373,115 7.875 % $ 402,727 8.50 % N/A N/A Tri Counties Bank $ 645,467 13.63 % $ 372,979 7.875 % $ 402,581 8.50 % $ 378,899 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 591,933 12.49 % $ 302,045 6.375 % $ 331,658 7.00 % N/A N/A Tri Counties Bank $ 645,467 13.63 % $ 301,935 6.375 % $ 331,537 7.00 % $ 307,856 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 647,262 10.68 % $ 242,452 4.000 % $ 242,452 4.00 % N/A N/A Tri Counties Bank $ 645,467 10.65 % $ 242,447 4.000 % $ 242,447 4.00 % $ 303,059 5.00 %

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)TrustOfficeSegmentcounties
Significant Of Accounting Policies [Line Items]
Number of subsidiary business trusts (in trusts) | Trust	5
Number of loan production offices (in offices) | Office	2
Company's investments in the trusts | $	$ 1,717
Number of business segment (in segments) | Segment	1
Loans contractual past due	90 days
California
Significant Of Accounting Policies [Line Items]
Number of counties (in counties) | counties	29

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	Jul. 06, 2018USD ($)Branchesshares	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)	Jul. 05, 2018USD ($)
Business Acquisition [Line Items]
Goodwill recognized			$ 220,872,000		$ 220,972,000
PNCI
Business Acquisition [Line Items]
Receivables gross contractual amount			866,189,000
Receivables fair value			833,381,000
PCI
Business Acquisition [Line Items]
Receivables gross contractual amount			1,683,000
Receivables fair value			1,302,000
FNBB
Business Acquisition [Line Items]
Total consideration value	$ 291,132,000
Issue of common stock (in shares) | shares	7,405,277
Amount paid in exchange for the outstanding options	$ 6,700,000
Number of branches added | Branches	12
Goodwill recognized	$ 156,561,000					$ 156,661,000
Recognized intangible related to acquisition	27,605,000
FNBB | Core Deposit Intangibles
Business Acquisition [Line Items]
Recognized intangible related to acquisition	$ 27,605,000
Finite lived intangible asset estimated useful life	6 years 2 months 12 days
Acquisition related costs		$ 601,000	$ 0	$ 1,077,000

Business Combinations - Schedul

Business Combinations - Schedule of Fair Value of Consideration Transferred, Identifiable Net Assets Acquired and Resulting Goodwill (Detail) - USD ($) $ in Thousands	Jul. 06, 2018	Sep. 30, 2019	Dec. 31, 2018	Jul. 05, 2018
Liabilities assumed:
Goodwill recognized		$ 220,872	$ 220,972
FNBB
Fair value of consideration transferred:
Fair value of shares issued	$ 284,437
Cash consideration	6,695
Total fair value of consideration transferred	291,132
Assets acquired:
Cash and cash equivalents	37,308
Securities available for sale	335,667
Restricted equity securities	7,723
Loans	834,683
Premises and equipment	30,522
Cash value of life insurance	16,817
Core deposit intangible	27,605
Other assets	16,214
Total assets acquired	1,306,539
Liabilities assumed:
Deposits	(991,935)
Other liabilities	15,033
Total liabilities assumed	1,171,968
Total net assets acquired	134,571
Goodwill recognized	156,561			$ 156,661
FNBB | Federal Home Loan Bank of San Francisco
Liabilities assumed:
Short-term borrowings - Federal Home Loan Bank	$ 165,000

Business Combinations - Summary

Business Combinations - Summary of Estimated Fair Value Adjustments Resulting in Goodwill (Detail) - USD ($) $ in Thousands	Jul. 06, 2018	Sep. 30, 2019	Dec. 31, 2018	Jul. 05, 2018
Business Acquisition [Line Items]
Goodwill		$ 220,872	$ 220,972
FNBB
Business Acquisition [Line Items]
Value of stock consideration paid to FNB Bancorp Shareholders	$ 284,437
Cash consideration	6,695
Cost basis net assets acquired	(114,030)
Investments	(1,081)
Premises and equipment	21,590
Core deposit intangible	27,327
Deferred income taxes	(6,394)
Other	1,489
Goodwill	156,561			$ 156,661
FNBB | Loans
Business Acquisition [Line Items]
Loans	$ (22,390)

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Values of Investments Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Totals, Amortized Cost	$ 977,543	$ 1,136,010
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	11,854	1,235
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	5,317	22,209
Debt Securities, Available-for-sale	984,080	1,115,036
Debt Securities Held to Maturity, Amortized Cost	393,449	444,936
Debt Securities Held to Maturity, Gross Unrealized Gains	6,732	409
Debt Securities Held to Maturity, Gross Unrealized Losses	(482)	(7,975)
Debt Securities Held to Maturity, Estimated Fair Value	399,699	437,370
Obligations of U.S. Government Agencies
Debt Securities, Available-for-sale [Line Items]
Totals, Amortized Cost	488,080	647,288
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	8,004	771
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	447	18,078
Debt Securities, Available-for-sale	495,637	629,981
Debt Securities Held to Maturity, Amortized Cost	379,634	430,343
Debt Securities Held to Maturity, Gross Unrealized Gains	6,382	327
Debt Securities Held to Maturity, Gross Unrealized Losses	(482)	(7,745)
Debt Securities Held to Maturity, Estimated Fair Value	385,534	422,925
Obligations of States and Political Subdivisions
Debt Securities, Available-for-sale [Line Items]
Totals, Amortized Cost	108,360	128,890
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3,550	294
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0	3,112
Debt Securities, Available-for-sale	111,910	126,072
Debt Securities Held to Maturity, Amortized Cost	13,815	14,593
Debt Securities Held to Maturity, Gross Unrealized Gains	350	82
Debt Securities Held to Maturity, Gross Unrealized Losses	0	(230)
Debt Securities Held to Maturity, Estimated Fair Value	14,165	14,445
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Totals, Amortized Cost	4,420	4,381
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	108	97
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0
Debt Securities, Available-for-sale	4,528	4,478
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Totals, Amortized Cost	376,683	355,451
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	192	73
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	4,870	1,019
Debt Securities, Available-for-sale	$ 372,005	$ 354,505

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019USD ($)Investmentsecurities	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Investment Securities [Line Items]
Investment securities sold	$ 125,247,000	$ 293,279,000
Realized Investment Gain	335,000	207,000
Realized Investment Loss	228,000	$ 0
Securities Pledged As Collateral	504,475,000		$ 597,591,000
Residential real estate mortgage-backed securities	$ 867,714,000
Life of mortgage-backed securities	4 years 8 months 12 days
Obligations of U.S. Government Agencies
Investment Securities [Line Items]
Percentage of aggregate depreciation in unrealized losses	0.59%
Asset-backed Securities
Investment Securities [Line Items]
Percentage of aggregate depreciation in unrealized losses	1.49%
Number of available for sale securities in unrealized loss position (in investment securities) | Investmentsecurities	25

Investment Securities - Amort_2

Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Due in one year, Amortized Cost	$ 2,607
Due after one year through five years, Amortized Cost	14,986
Due after five years through ten years, Amortized Cost	46,263
Due after ten years, Amortized Cost	913,687
Debt Securities, Available-for-sale, Amortized Cost	977,543	$ 1,136,010
Due in one year, Estimated Fair Value	2,613
Due after one year through five years, Estimated Fair Value	15,401
Due after five years through ten years, Estimated Fair Value	47,273
Due after ten years, Estimated Fair Value	918,793
Debt Securities, Available-for-sale	984,080	1,115,036
Due within one year, Amortized Cost, Held to Maturity	1,263
Due after one year through five years, Amortized Cost, Held to Maturity	0
Due after five years through ten years, Amortized Cost, Held to Maturity	20,747
Due after ten years, Amortized Cost, Held to Maturity	371,439
Totals, Amortized Cost, Held to Maturity	393,449	444,936
Due within one year, Estimated Fair Value, Held to Maturity	1,274
Due after one year through five years, Estimated Fair Value, Held to Maturity	0
Due after five years through ten years, Estimated Fair Value, Held to Maturity	21,035
Due after ten years, Estimated Fair Value, Held to Maturity	377,390
Debt Securities Held to Maturity, Estimated Fair Value	$ 399,699	$ 437,370

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses on Investment Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value	$ 331,795	$ 336,433
Debt Securities, Available for Sale, Less than 12 more, Unrealized Loss	(4,806)	(6,148)
Debt Securities, Available for Sale, 12 Months or more, Fair Value	71,152	415,349
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss	(511)	(16,061)
Debt Securities, Available for Sale, Fair Value	402,947	751,782
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	5,317	22,209
Debt Securities Held to Maturity, Less than 12 months, Fair Value		229,596
Debt Securities Held to Maturity, Less than 12 months, Unrealized Loss		(2,733)
Debt Securities Held to Maturity, 12 months or more, Fair Value		162,690
Debt Securities Held to Maturity, 12 months or more, Unrealized Loss		(5,242)
Debt Securities Held to Maturity, Fair Value		392,286
Debt Securities Held to Maturity, Unrealized Loss		(7,975)
Obligations of U.S. Government Agencies
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value	38,295	171,309
Debt Securities, Available for Sale, Less than 12 more, Unrealized Loss	(374)	(3,588)
Debt Securities, Available for Sale, 12 Months or more, Fair Value	25,171	394,630
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss	(73)	(14,490)
Debt Securities, Available for Sale, Fair Value	63,466	565,939
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	447	18,078
Debt Securities Held to Maturity, Less than 12 months, Fair Value	19,749	223,810
Debt Securities Held to Maturity, Less than 12 months, Unrealized Loss	(94)	(2,619)
Debt Securities Held to Maturity, 12 months or more, Fair Value	78,604	158,648
Debt Securities Held to Maturity, 12 months or more, Unrealized Loss	(388)	(5,126)
Debt Securities Held to Maturity, Fair Value	98,353	382,458
Debt Securities Held to Maturity, Unrealized Loss	(482)	(7,745)
Obligations of States and Political Subdivisions
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value		63,738
Debt Securities, Available for Sale, Less than 12 more, Unrealized Loss		(1,541)
Debt Securities, Available for Sale, 12 Months or more, Fair Value		20,719
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss		(1,571)
Debt Securities, Available for Sale, Fair Value		84,457
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total		3,112
Debt Securities Held to Maturity, Less than 12 months, Fair Value		5,786
Debt Securities Held to Maturity, Less than 12 months, Unrealized Loss		(114)
Debt Securities Held to Maturity, 12 months or more, Fair Value		4,042
Debt Securities Held to Maturity, 12 months or more, Unrealized Loss		(116)
Debt Securities Held to Maturity, Fair Value		9,828
Debt Securities Held to Maturity, Unrealized Loss		(230)
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available for Sale, Less than 12 Months, Fair Value	293,500	101,386
Debt Securities, Available for Sale, Less than 12 more, Unrealized Loss	(4,432)	(1,019)
Debt Securities, Available for Sale, 12 Months or more, Fair Value	45,981	0
Debt Securities, Available for Sale, 12 Months or more, Unrealized Loss	(438)
Debt Securities, Available for Sale, Fair Value	339,481	101,386
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss, Total	$ 4,870	$ 1,019

Loans - Summary of Loan Balance

Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	$ 4,227,934		$ 4,075,244
Unamortized net deferred loan fees	(8,509)		(9,868)
Discounts to principal balance of loans owed, net of charge-offs	(37,077)		(43,362)
Total loans, net of unamortized deferred loan fees and discounts	4,182,348		4,022,014	$ 4,027,436
Allowance for loan losses	(31,537)	$ (32,868)	(32,582)	(31,603)	$ (29,524)	$ (30,323)
Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,247,156		3,143,100	3,132,202
Allowance for loan losses	(14,347)	(14,675)	(15,620)	(15,279)	(13,598)	(13,758)
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	442,539		418,982	421,285
Allowance for loan losses	(8,549)	(8,552)	(8,375)	(7,514)	(7,137)	(8,227)
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	278,458		276,548	289,647
Allowance for loan losses	(5,687)	(6,745)	(6,090)	(6,224)	(6,378)	(6,512)
Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	214,195		183,384	184,302
Allowance for loan losses	(2,954)	(2,896)	(2,497)	(2,586)	(2,411)	(1,826)
Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	505,794		515,262	524,414
Allowance for loan losses	(2,406)	(2,576)	(2,676)	(2,400)	(1,991)	(2,317)
Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	30,370		36,684	40,693
Allowance for loan losses	(1,262)	(1,242)	(1,540)	(1,593)	(1,532)	(1,841)
Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	80,297		55,721	49,456
Allowance for loan losses	(1,553)	(1,451)	(793)	(700)	(557)	(586)
Commercial loans | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,741,362		2,627,838	2,607,788
Allowance for loan losses	(11,941)	(12,099)	(12,944)	(12,879)	(11,607)	(11,441)
Commercial loans | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	45,161		62,088	69,728
Allowance for loan losses	(297)	(358)	(663)	(960)	(977)	(642)
Home equity lines of credit | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	331,872		326,577	331,136
Allowance for loan losses	(5,734)	(5,859)	(6,042)	(5,221)	(5,048)	(5,800)
Residential | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	169,034		121,296	114,574
Allowance for loan losses	(2,657)	$ (2,538)	(1,834)	$ (1,626)	$ (1,434)	$ (1,184)
Originated
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	3,319,052		2,991,324
Unamortized net deferred loan fees	(8,509)		(9,868)
Total loans, net of unamortized deferred loan fees and discounts	3,310,543		2,981,456
Allowance for loan losses	(31,112)		(31,793)
Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,464,955		2,254,777
Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	385,598		351,133
Originated | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	256,379		228,635
Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	203,611		146,911
Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	355,646		343,796
Originated | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	27,034		32,660
Originated | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	64,153		34,020
Originated | Commercial loans | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,109,309		1,910,981
Originated | Commercial loans | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	44,704		56,208
Originated | Home equity lines of credit | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	294,411		284,453
Originated | Residential | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	158,907		90,703
PNCI
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	892,608		1,062,655
Discounts to principal balance of loans owed, net of charge-offs	(31,108)		(36,320)
Total loans, net of unamortized deferred loan fees and discounts	861,500		1,026,335
Allowance for loan losses	(419)		(667)
PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	775,655		878,193
PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	55,692		66,201
PNCI | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	19,569		45,468
PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	10,584		36,473
PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	148,731		169,792
PNCI | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,915		3,585
PNCI | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	16,142		21,659
PNCI | Commercial loans | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	626,924		708,401
PNCI | Commercial loans | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	457		5,880
PNCI | Home equity lines of credit | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	36,635		40,957
PNCI | Residential | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	10,127		30,593
PCI
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	16,274		21,265
Discounts to principal balance of loans owed, net of charge-offs	(5,969)		(7,042)
Total loans, net of unamortized deferred loan fees and discounts	10,305		14,223
Allowance for loan losses	(6)		(122)
PCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	6,546		10,130
PCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,249		1,648
PCI | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,510		2,445
PCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	0
PCI | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,417		1,674
PCI | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	421		439
PCI | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2		42
PCI | Commercial loans | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,129		8,456
PCI | Home equity lines of credit | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 826		$ 1,167

Loans - Change in Accretable Yi

Loans - Change in Accretable Yield for PCI (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Change in accretable yield:
Balance at beginning of period	$ 5,318	$ 5,871	$ 6,059	$ 6,137
Accretion to interest income	(292)	(253)	(702)	(769)
Reclassification (to) from nonaccretable difference	71	(47)	(260)	203
Balance at end of period	$ 5,097	$ 5,571	$ 5,097	$ 5,571

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						$ 30,007	$ 30,266	$ 28,865
Beginning Balance	$ 32,868	$ 29,524	$ 32,582	$ 30,323	$ 30,323
Charge-offs	(1,522)	(1,142)	(2,541)	(1,940)	(2,364)
Recoveries	520	570	2,888	1,443	2,040
Provision (benefit)	(329)	2,651	(1,392)	1,777	2,583
Ending Balance	31,537	31,603	31,537	31,603	32,582
Individually evaluated for impairment						1,524	2,194	2,628
Total allowance for loan losses	32,868	29,524	31,537	30,323	32,582	31,537	32,582	31,603
Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						14,230	15,357	14,865
Beginning Balance	14,675	13,598	15,620	13,758	13,758
Charge-offs	(746)	(25)	(748)	(92)	(92)
Recoveries	174	15	1,570	51	68
Provision (benefit)	244	1,691	(2,095)	1,562	1,886
Ending Balance	14,347	15,279	14,347	15,279	15,620
Individually evaluated for impairment						117	147	325
Total allowance for loan losses	14,675	13,598	15,620	13,758	15,620	14,347	15,620	15,279
Mortgage Loans on Real Estate | Commercial loans
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						11,915	12,737	12,552
Beginning Balance	12,099	11,607	12,944	11,441	11,441
Charge-offs	(746)	0	(746)	(15)	(15)
Recoveries	126	15	1,517	51	68
Provision (benefit)	462	1,257	(1,774)	1,402	1,450
Ending Balance	11,941	12,879	11,941	12,879	12,944
Individually evaluated for impairment						26	91	268
Total allowance for loan losses	12,099	11,607	11,941	11,441	11,441	11,941	12,944	12,879
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						8,395	8,103	7,061
Beginning Balance	8,552	7,137	8,375	8,227	8,227
Charge-offs	(191)	(424)	(551)	(896)	(1,084)
Recoveries	262	353	981	1,061	1,431
Provision (benefit)	(74)	448	(256)	(878)	(199)
Ending Balance	8,549	7,514	8,549	7,514	8,375
Individually evaluated for impairment						148	266	446
Total allowance for loan losses	8,552	7,137	8,375	7,514	8,375	8,549	8,375	7,514
Consumer | Home equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						5,644	5,838	5,046
Beginning Balance	5,859	5,048	6,042	5,800	5,800
Charge-offs		(172)		(276)	(277)
Recoveries	27	151	305	677	846
Provision (benefit)	(152)	194	(613)	(980)	(327)
Ending Balance	5,734	5,221	5,734	5,221	6,042
Individually evaluated for impairment						84	198	168
Total allowance for loan losses	5,859	5,048	5,734	5,800	5,800	5,734	6,042	5,221
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						4,428	4,309	4,353
Beginning Balance	6,745	6,378	6,090	6,512	6,512
Charge-offs	(585)	(693)	(1,242)	(952)	(1,188)
Recoveries	84	202	337	331	541
Provision (benefit)	(557)	337	502	333	225
Ending Balance	5,687	6,224	5,687	6,224	6,090
Individually evaluated for impairment						1,259	1,781	1,857
Total allowance for loan losses	6,745	6,378	6,090	6,512	6,090	5,687	6,090	6,224
Construction
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						2,954	2,497	2,586
Beginning Balance	2,896	2,411	2,497	1,826	1,826
Provision (benefit)	58	175	457	760	671
Ending Balance	2,954	2,586	2,954	2,586	2,497
Total allowance for loan losses	2,896	2,411	2,497	1,826	2,497	2,954	2,497	2,586
Construction | Commercial loans
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						297	663	960
Beginning Balance	358	977	663	642	642
Provision (benefit)	(61)	(17)	(366)	318	21
Ending Balance	297	960	297	960	663
Total allowance for loan losses	358	977	297	642	663	297	663	960
Construction | Residential
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						2,657	1,834	1,626
Beginning Balance	2,538	1,434	1,834	1,184	1,184
Provision (benefit)	119	192	823	442	650
Ending Balance	2,657	1,626	2,657	1,626	1,834
Total allowance for loan losses	2,538	1,434	2,657	1,184	1,834	2,657	1,834	1,626
Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						2,315	2,620	2,313
Beginning Balance	2,576	1,991	2,676	2,317	2,317
Charge-offs		(25)	(2)	(77)	(77)
Recoveries	48		53
Provision (benefit)	(218)	434	(321)	160	436
Ending Balance	2,406	2,400	2,406	2,400	2,676
Individually evaluated for impairment						91	56	57
Total allowance for loan losses	2,576	1,991	2,676	2,400	2,676	2,406	2,676	2,400
Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						1,216	1,486	1,418
Beginning Balance	1,242	1,532	1,540	1,841	1,841
Charge-offs	(3)	(23)	(3)	(23)	(24)
Recoveries	156	139	414	176	297
Provision (benefit)	(133)	(55)	(689)	(401)	(574)
Ending Balance	1,262	1,593	1,262	1,593	1,540
Individually evaluated for impairment						46	54	175
Total allowance for loan losses	1,242	1,532	1,262	1,841	1,540	1,262	1,540	1,593
Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation						1,535	779	597
Beginning Balance	1,451	557	793	586	586
Charge-offs	(188)	(229)	(548)	(597)	(783)
Recoveries	79	63	262	208	288
Provision (benefit)	211	309	1,046	503	702
Ending Balance	1,553	700	1,553	700	793
Individually evaluated for impairment						18	14	103
Total allowance for loan losses	$ 1,451	$ 557	$ 1,553	$ 586	$ 793	1,553	793	700
Loans acquired with deteriorated credit quality
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality						6	122	110
Loans acquired with deteriorated credit quality | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality							116	89
Loans acquired with deteriorated credit quality | Mortgage Loans on Real Estate | Commercial loans
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality							116	59
Loans acquired with deteriorated credit quality | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality						6	6	7
Loans acquired with deteriorated credit quality | Consumer | Home equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality						$ 6	$ 6	7
Loans acquired with deteriorated credit quality | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality								14
Loans acquired with deteriorated credit quality | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality								$ 30

Allowance for Loan Losses - S_2

Allowance for Loan Losses - Summary of Activity in Allowance for Loan Losses, Net of Unearned Fees for Periods Indicated (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	$ 30,007		$ 30,266	$ 28,865
Individually evaluated for impairment	1,524		2,194	2,628
Total allowance for loan losses	31,537	$ 32,868	32,582	31,603	$ 29,524	$ 30,323
Loans pooled for evaluation	4,149,558		3,979,744	3,986,144
Individually evaluated for impairment	22,485		28,047	27,494
Total loans, net of unamortized deferred loan fees and discounts	4,182,348		4,022,014	4,027,436
Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	14,230		15,357	14,865
Individually evaluated for impairment	117		147	325
Total allowance for loan losses	14,347	14,675	15,620	15,279	13,598	13,758
Loans pooled for evaluation	3,226,848		3,116,086	3,104,594
Individually evaluated for impairment	13,762		16,884	18,025
Total loans, net of unamortized deferred loan fees and discounts	3,247,156		3,143,100	3,132,202
Mortgage Loans on Real Estate | Commercial loans
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	11,915		12,737	12,552
Individually evaluated for impairment	26		91	268
Total allowance for loan losses	11,941	12,099	12,944	12,879	11,607	11,441
Loans pooled for evaluation	2,727,228		2,606,819	2,586,659
Individually evaluated for impairment	9,005		12,563	13,244
Total loans, net of unamortized deferred loan fees and discounts	2,741,362		2,627,838	2,607,788
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	8,395		8,103	7,061
Individually evaluated for impairment	148		266	446
Total allowance for loan losses	8,549	8,552	8,375	7,514	7,137	8,227
Loans pooled for evaluation	437,068		411,389	414,660
Individually evaluated for impairment	4,222		5,945	4,837
Total loans, net of unamortized deferred loan fees and discounts	442,539		418,982	421,285
Consumer | Home equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	5,644		5,838	5,046
Individually evaluated for impairment	84		198	168
Total allowance for loan losses	5,734	5,859	6,042	5,221	5,048	5,800
Loans pooled for evaluation	329,129		322,764	327,649
Individually evaluated for impairment	1,917		2,646	2,188
Total loans, net of unamortized deferred loan fees and discounts	331,872		326,577	331,136
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	4,428		4,309	4,353
Individually evaluated for impairment	1,259		1,781	1,857
Total allowance for loan losses	5,687	6,745	6,090	6,224	6,378	6,512
Loans pooled for evaluation	271,447		268,885	282,588
Individually evaluated for impairment	4,501		5,218	4,632
Total loans, net of unamortized deferred loan fees and discounts	278,458		276,548	289,647
Construction
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	2,954		2,497	2,586
Total allowance for loan losses	2,954	2,896	2,497	2,586	2,411	1,826
Loans pooled for evaluation	214,195		183,384	184,302
Individually evaluated for impairment				0
Total loans, net of unamortized deferred loan fees and discounts	214,195		183,384	184,302
Construction | Commercial loans
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	297		663	960
Total allowance for loan losses	297	358	663	960	977	642
Loans pooled for evaluation	45,161		62,088	69,728
Total loans, net of unamortized deferred loan fees and discounts	45,161		62,088	69,728
Construction | Residential
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	2,657		1,834	1,626
Total allowance for loan losses	2,657	2,538	1,834	1,626	1,434	1,184
Loans pooled for evaluation	169,034		121,296	114,574
Total loans, net of unamortized deferred loan fees and discounts	169,034		121,296	114,574
Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	2,315		2,620	2,313
Individually evaluated for impairment	91		56	57
Total allowance for loan losses	2,406	2,576	2,676	2,400	1,991	2,317
Loans pooled for evaluation	499,620		509,267	517,935
Individually evaluated for impairment	4,757		4,321	4,781
Total loans, net of unamortized deferred loan fees and discounts	505,794		515,262	524,414
Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	1,216		1,486	1,418
Individually evaluated for impairment	46		54	175
Total allowance for loan losses	1,262	1,242	1,540	1,593	1,532	1,841
Loans pooled for evaluation	27,793		33,142	37,840
Individually evaluated for impairment	2,156		3,103	2,406
Total loans, net of unamortized deferred loan fees and discounts	30,370		36,684	40,693
Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans pooled for evaluation	1,535		779	597
Individually evaluated for impairment	18		14	103
Total allowance for loan losses	1,553	$ 1,451	793	700	$ 557	$ 586
Loans pooled for evaluation	80,146		55,483	49,171
Individually evaluated for impairment	149		196	243
Total loans, net of unamortized deferred loan fees and discounts	80,297		55,721	49,456
Loans acquired with deteriorated credit quality
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality	6		122	110
Total loans, net of unamortized deferred loan fees and discounts	10,305		14,223	13,798
Loans acquired with deteriorated credit quality | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality			116	89
Total loans, net of unamortized deferred loan fees and discounts	6,546		10,130	9,583
Loans acquired with deteriorated credit quality | Mortgage Loans on Real Estate | Commercial loans
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality			116	59
Total loans, net of unamortized deferred loan fees and discounts	5,129		8,456	7,885
Loans acquired with deteriorated credit quality | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality	6		6	7
Total loans, net of unamortized deferred loan fees and discounts	1,249		1,648	1,788
Loans acquired with deteriorated credit quality | Consumer | Home equity lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality	6		6	7
Total loans, net of unamortized deferred loan fees and discounts	826		1,167	1,299
Loans acquired with deteriorated credit quality | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality				14
Total loans, net of unamortized deferred loan fees and discounts	2,510		2,445	2,427
Loans acquired with deteriorated credit quality | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts				0
Loans acquired with deteriorated credit quality | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loans acquired with deteriorated credit quality				30
Total loans, net of unamortized deferred loan fees and discounts	1,417		1,674	1,698
Loans acquired with deteriorated credit quality | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	421		439	447
Loans acquired with deteriorated credit quality | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 2		$ 42	$ 42

Allowance for Loan Losses - Sch

Allowance for Loan Losses - Schedule Credit Quality Indicators (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 4,182,348	$ 4,022,014	$ 4,027,436
Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,247,156	3,143,100	3,132,202
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	442,539	418,982	421,285
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	278,458	276,548	289,647
Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	214,195	183,384	184,302
Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	505,794	515,262	524,414
Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	30,370	36,684	40,693
Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	80,297	55,721	49,456
Originated
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,310,543	2,981,456
Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,464,955	2,254,777
Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	385,598	351,133
Originated | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	256,379	228,635
Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	203,611	146,911
Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	355,646	343,796
Originated | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	27,034	32,660
Originated | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	64,153	34,020
PNCI
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	861,500	1,026,335
PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	775,655	878,193
PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	55,692	66,201
PNCI | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	19,569	45,468
PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	10,584	36,473
PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	148,731	169,792
PNCI | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,915	3,585
PNCI | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	16,142	21,659
Commercial loans | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,741,362	2,627,838	2,607,788
Commercial loans | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	45,161	62,088	69,728
Commercial loans | Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,109,309	1,910,981
Commercial loans | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	44,704	56,208
Commercial loans | PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	626,924	708,401
Commercial loans | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	457	5,880
Home equity lines of credit | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	331,872	326,577	331,136
Home equity lines of credit | Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	294,411	284,453
Home equity lines of credit | PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	36,635	40,957
Residential | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	169,034	121,296	$ 114,574
Residential | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	158,907	90,703
Residential | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	10,127	30,593
Pass | Originated
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,234,025	2,904,603
Pass | Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,412,659	2,198,816
Pass | Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	376,021	342,386
Pass | Originated | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	242,308	217,126
Pass | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	203,037	146,275
Pass | Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	348,668	337,189
Pass | Originated | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	23,819	29,289
Pass | Originated | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	63,648	33,606
Pass | PNCI
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	842,642	1,014,950
Pass | PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	763,513	869,776
Pass | PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	53,293	63,674
Pass | PNCI | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	19,399	45,027
Pass | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	6,437	36,473
Pass | PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	145,141	167,908
Pass | PNCI | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,841	3,413
Pass | PNCI | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	15,792	21,481
Pass | Commercial loans | Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,063,991	1,861,627
Pass | Commercial loans | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	44,380	55,863
Pass | Commercial loans | PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	618,372	701,868
Pass | Commercial loans | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	457	5,880
Pass | Home equity lines of credit | Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	288,554	279,491
Pass | Home equity lines of credit | PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	34,660	38,780
Pass | Residential | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	158,657	90,412
Pass | Residential | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,980	30,593
Special Mention | Originated
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	55,199	45,415
Special Mention | Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	40,893	35,207
Special Mention | Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,014	3,704
Special Mention | Originated | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	8,968	6,127
Special Mention | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	324	377
Special Mention | Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,743	1,724
Special Mention | Originated | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,184	1,054
Special Mention | Originated | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	452	341
Special Mention | PNCI
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,671	5,863
Special Mention | PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,291	4,171
Special Mention | PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,232	1,371
Special Mention | PNCI | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1	321
Special Mention | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,147
Special Mention | PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,617	1,086
Special Mention | PNCI | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	0	74
Special Mention | PNCI | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	341	173
Special Mention | Commercial loans | Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	38,150	33,483
Special Mention | Commercial loans | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	324	345
Special Mention | Commercial loans | PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,674	3,085
Special Mention | Home equity lines of credit | Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,378	2,309
Special Mention | Home equity lines of credit | PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	891	1,124
Special Mention | Residential | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts		32
Special Mention | Residential | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,147
Substandard | Originated
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	21,319	31,438
Substandard | Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	11,403	20,754
Substandard | Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,563	5,043
Substandard | Originated | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,103	5,382
Substandard | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	250	259
Substandard | Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,235	4,883
Substandard | Originated | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,031	2,317
Substandard | Originated | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	53	73
Substandard | PNCI
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,187	5,522
Substandard | PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	7,851	4,246
Substandard | PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,167	1,156
Substandard | PNCI | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	169	120
Substandard | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	0
Substandard | PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,973	798
Substandard | PNCI | Home equity loans | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	74	98
Substandard | PNCI | Other | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9	5
Substandard | Commercial loans | Originated | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	7,168	15,871
Substandard | Commercial loans | PNCI | Mortgage Loans on Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,878	3,448
Substandard | Commercial loans | PNCI | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	0
Substandard | Home equity lines of credit | Originated | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,479	2,653
Substandard | Home equity lines of credit | PNCI | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,084	1,053
Substandard | Residential | Originated | Construction
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	250	$ 259
Doubtful / Loss | Originated
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	0
Doubtful / Loss | Originated | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts

Allowance for Loan Losses - Ana

Allowance for Loan Losses - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Total	$ 4,182,348	$ 4,027,436	$ 4,022,014
Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Total	3,247,156	3,132,202	3,143,100
Consumer
Financing Receivable, Past Due [Line Items]
Total	442,539	421,285	418,982
Commercial
Financing Receivable, Past Due [Line Items]
Total	278,458	289,647	276,548
Construction
Financing Receivable, Past Due [Line Items]
Total	214,195	184,302	183,384
Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Total	505,794	524,414	515,262
Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Total	30,370	40,693	36,684
Other | Consumer
Financing Receivable, Past Due [Line Items]
Total	80,297	49,456	55,721
Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Total	2,741,362	2,607,788	2,627,838
Commercial loans | Construction
Financing Receivable, Past Due [Line Items]
Total	45,161	69,728	62,088
Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Total	331,872	331,136	326,577
Residential | Construction
Financing Receivable, Past Due [Line Items]
Total	169,034	114,574	121,296
Originated
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	18,737	25,607	27,385
Past due	5,728		10,460
Current	3,304,815		2,970,996
Total	3,310,543		2,981,456
> 90 Days and Still Accruing	36
Average recorded investment	21,760	23,292	24,713
Originated | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	10,467	16,738	17,675
Past due	1,707		4,212
Current	2,463,248		2,250,565
Total	2,464,955		2,254,777
Average recorded investment	13,310	15,432	16,632
Originated | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	3,510	4,001	4,277
Past due	2,567		3,160
Current	383,031		347,973
Total	385,598		351,133
> 90 Days and Still Accruing	6
Average recorded investment	3,681	3,166	3,422
Originated | Commercial
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	4,760	4,868	5,433
Past due	1,454		2,879
Current	254,925		225,756
Total	256,379		228,635
> 90 Days and Still Accruing	30
Average recorded investment	4,769	4,626	4,654
Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	0		209
Current	203,611		146,702
Total	203,611		146,911
Average recorded investment		68	5
Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	4,461	4,185	4,594
Past due	1,542		2,285
Current	354,104		341,511
Total	355,646		343,796
Average recorded investment	4,214	3,883	3,517
Originated | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	2,157	2,554	2,374
Past due	495		1,281
Current	26,539		31,379
Total	27,034		32,660
> 90 Days and Still Accruing	6
Average recorded investment	1,973	1,753	1,520
Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	74	3	3
Past due	276		315
Current	63,877		33,705
Total	64,153		34,020
> 90 Days and Still Accruing	0
Average recorded investment	46	3	17
Originated | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	6,006	12,553	13,081
Past due	165		1,927
Current	2,109,144		1,909,054
Total	2,109,309		1,910,981
Average recorded investment	9,096	11,549	13,115
Originated | Commercial loans | Construction
Financing Receivable, Past Due [Line Items]
Current	44,704		56,208
Total	44,704		56,208
Originated | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	1,279	1,444	1,900
Past due	1,796		1,564
Current	292,615		282,889
Total	294,411		284,453
Average recorded investment	1,662	1,410	1,885
Originated | Residential | Construction
Financing Receivable, Past Due [Line Items]
Past due	0		209
Current	158,907		90,494
Total	158,907		90,703
Average recorded investment		68	5
PNCI
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	5,626	3,945	4,990
Past due	2,029		6,908
Current	859,471		1,019,427
Total	861,500		1,026,335
Average recorded investment	4,383	3,355	3,691
PNCI | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	4,214	2,557	3,485
Past due	1,244		5,162
Current	774,411		873,031
Total	775,655		878,193
Average recorded investment	2,981	1,902	2,242
PNCI | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	1,231	1,388	1,385
Past due	611		810
Current	55,081		65,391
Total	55,692		66,201
Average recorded investment	1,255	1,453	1,389
PNCI | Commercial
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	181		120
Past due	174		936
Current	19,395		44,532
Total	19,569		45,468
Average recorded investment	147		60
PNCI | Construction
Financing Receivable, Past Due [Line Items]
Past due	0
Current	10,584		36,473
Total	10,584		36,473
PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	959	1,302	375
Past due	295		1,298
Current	148,436		168,494
Total	148,731		169,792
Average recorded investment	621	1,275	529
PNCI | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	395	296	252
Past due	246		74
Current	2,669		3,511
Total	2,915		3,585
Average recorded investment	308	287	155
PNCI | Other | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	95	240	106
Past due	61		160
Current	16,081		21,499
Total	16,142		21,659
Average recorded investment	103	257	114
PNCI | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	3,255	1,255	3,110
Past due	949		3,864
Current	625,975		704,537
Total	626,924		708,401
Average recorded investment	2,360	627	1,713
PNCI | Commercial loans | Construction
Financing Receivable, Past Due [Line Items]
Past due	0
Current	457		5,880
Total	457		5,880
PNCI | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Unpaid principal balance	741	852	1,027
Past due	304		576
Current	36,331		40,381
Total	36,635		40,957
Average recorded investment	844	$ 909	1,120
PNCI | Residential | Construction
Financing Receivable, Past Due [Line Items]
Current	10,127		30,593
Total	10,127		30,593
30-59 days | Originated
Financing Receivable, Past Due [Line Items]
Past due	2,638		5,617
30-59 days | Originated | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	406		2,106
30-59 days | Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	1,277		2,249
30-59 days | Originated | Commercial
Financing Receivable, Past Due [Line Items]
Past due	955		1,053
30-59 days | Originated | Construction
Financing Receivable, Past Due [Line Items]
Past due	0		209
30-59 days | Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	289		1,675
30-59 days | Originated | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due	253		1,043
30-59 days | Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	134		298
30-59 days | Originated | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	117		431
30-59 days | Originated | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Past due	890		908
30-59 days | Originated | Residential | Construction
Financing Receivable, Past Due [Line Items]
Past due	0		209
30-59 days | PNCI
Financing Receivable, Past Due [Line Items]
Past due	236		3,871
30-59 days | PNCI | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	0		2,655
30-59 days | PNCI | Consumer
Financing Receivable, Past Due [Line Items]
Past due	236		538
30-59 days | PNCI | Commercial
Financing Receivable, Past Due [Line Items]
Past due	0		678
30-59 days | PNCI | Construction
Financing Receivable, Past Due [Line Items]
Past due	0
30-59 days | PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	0		1,009
30-59 days | PNCI | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due	0		74
30-59 days | PNCI | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	54		160
30-59 days | PNCI | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	0		1,646
30-59 days | PNCI | Commercial loans | Construction
Financing Receivable, Past Due [Line Items]
Past due	0
30-59 days | PNCI | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Past due	182		304
60-89 days | Originated
Financing Receivable, Past Due [Line Items]
Past due	866		1,999
60-89 days | Originated | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	114		1,332
60-89 days | Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	525		88
60-89 days | Originated | Commercial
Financing Receivable, Past Due [Line Items]
Past due	227		579
60-89 days | Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	66		132
60-89 days | Originated | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due	105		24
60-89 days | Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	138		17
60-89 days | Originated | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	48		1,200
60-89 days | Originated | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Past due	282		47
60-89 days | PNCI
Financing Receivable, Past Due [Line Items]
Past due	195		1,449
60-89 days | PNCI | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	52		1,269
60-89 days | PNCI | Consumer
Financing Receivable, Past Due [Line Items]
Past due	143		35
60-89 days | PNCI | Commercial
Financing Receivable, Past Due [Line Items]
Past due	0		145
60-89 days | PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	52		133
60-89 days | PNCI | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due	14
60-89 days | PNCI | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	7
60-89 days | PNCI | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	0		1,136
60-89 days | PNCI | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Past due	122		35
> 90 days | Originated
Financing Receivable, Past Due [Line Items]
Past due	2,224		2,844
> 90 days | Originated | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	1,187		774
> 90 days | Originated | Consumer
Financing Receivable, Past Due [Line Items]
Past due	765		823
> 90 days | Originated | Commercial
Financing Receivable, Past Due [Line Items]
Past due	272		1,247
> 90 days | Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	1,187		478
> 90 days | Originated | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due	137		214
> 90 days | Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Past due	4
> 90 days | Originated | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	0		296
> 90 days | Originated | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Past due	624		609
> 90 days | PNCI
Financing Receivable, Past Due [Line Items]
Past due	1,598		1,588
> 90 days | PNCI | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	1,192		1,238
> 90 days | PNCI | Consumer
Financing Receivable, Past Due [Line Items]
Past due	232		237
> 90 days | PNCI | Commercial
Financing Receivable, Past Due [Line Items]
Past due	174		113
> 90 days | PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	243		156
> 90 days | PNCI | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Past due	232
> 90 days | PNCI | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Past due	949		1,082
> 90 days | PNCI | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Past due	$ 0		$ 237

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Originated
Loans and Leases Receivable Disclosure [Line Items]
Interest income on non accrual loans	$ 124	$ 338	$ 692	$ 964
Interest income recognized on non accrual loans	59	59	145	133
Impaired TDR Loans	8,556	8,845	8,556	8,845	$ 10,253
PNCI
Loans and Leases Receivable Disclosure [Line Items]
Interest income on non accrual loans	201	39	322	93
Interest income recognized on non accrual loans	92	12	152	23
Impaired TDR Loans	$ 738	$ 840	$ 738	$ 840	$ 615

Allowance for Loan Losses - S_3

Allowance for Loan Losses - Schedule of Non Accrual Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 16,287	$ 22,274
Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	9,513	14,309
Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	3,375	4,090
Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	3,399	3,875
Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	3,728	3,578
Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,668	1,769
Other | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	93	7
Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	5,785	10,731
Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,614	2,314
Originated
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	11,260	19,416
Originated | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	5,352	12,507
Originated | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	2,683	3,154
Originated | Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	3,225	3,755
Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	2,820	3,244
Originated | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,405	1,722
Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	90	3
Originated | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	2,532	9,263
Originated | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,188	1,429
PNCI
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	5,027	2,858
PNCI | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	4,161	1,802
PNCI | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	692	936
PNCI | Commercial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	174	120
PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	908	334
PNCI | Home equity loans | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	263	47
PNCI | Other | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	3	4
PNCI | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	3,253	1,468
PNCI | Home equity lines of credit | Consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 426	$ 885

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Originated
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 18,737	$ 25,607	$ 27,385
Recorded investment with no related allowance	10,864	18,311	20,904
Recorded investment with related allowance	6,130	5,397	4,539
Total recorded investment	16,994	23,708	25,443
Related Allowance	1,376	2,234	1,948
Average recorded investment	21,760	23,292	24,713
Interest income recognized	145	409	386
Originated | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	10,467	16,738	17,675
Recorded investment with no related allowance	7,476	12,870	14,339
Recorded investment with related allowance	2,125	2,681	2,073
Total recorded investment	9,601	15,551	16,412
Related Allowance	117	325	98
Average recorded investment	13,310	15,432	16,632
Interest income recognized	91	275	227
Originated | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	3,510	4,001	4,277
Recorded investment with no related allowance	2,777	3,306	3,641
Recorded investment with related allowance	289	219	179
Total recorded investment	3,066	3,525	3,820
Related Allowance	60	52	76
Average recorded investment	3,681	3,166	3,422
Interest income recognized	32	56	68
Originated | Commercial
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	4,760	4,868	5,433
Recorded investment with no related allowance	611	2,135	2,924
Recorded investment with related allowance	3,716	2,497	2,287
Total recorded investment	4,327	4,632	5,211
Related Allowance	1,199	1,857	1,774
Average recorded investment	4,769	4,626	4,654
Interest income recognized	22	78	91
Originated | Construction
Financing Receivable, Impaired [Line Items]
Average recorded investment		68	5
Originated | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	4,461	4,185	4,594
Recorded investment with no related allowance	3,053	3,251	3,663
Recorded investment with related allowance	796	311	308
Total recorded investment	3,849	3,562	3,971
Related Allowance	91	57	56
Average recorded investment	4,214	3,883	3,517
Interest income recognized	32	67	90
Originated | Home equity loans | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	2,157	2,554	2,374
Recorded investment with no related allowance	1,542	1,960	1,892
Recorded investment with related allowance	238	157	65
Total recorded investment	1,780	2,117	1,957
Related Allowance	46	30	2
Average recorded investment	1,973	1,753	1,520
Interest income recognized	5	24	23
Originated | Other | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	74	3	3
Recorded investment with no related allowance	3
Recorded investment with related allowance	51	3	3
Total recorded investment	54	3	3
Related Allowance	14	3	3
Average recorded investment	46	3	17
Interest income recognized	1		2
Originated | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	6,006	12,553	13,081
Recorded investment with no related allowance	4,423	9,619	10,676
Recorded investment with related allowance	1,329	2,370	1,765
Total recorded investment	5,752	11,989	12,441
Related Allowance	26	268	42
Average recorded investment	9,096	11,549	13,115
Interest income recognized	59	208	137
Originated | Home equity lines of credit | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	1,279	1,444	1,900
Recorded investment with no related allowance	1,232	1,346	1,749
Recorded investment with related allowance		59	111
Total recorded investment	1,232	1,405	1,860
Related Allowance		19	71
Average recorded investment	1,662	1,410	1,885
Interest income recognized	26	32	43
Originated | Residential | Construction
Financing Receivable, Impaired [Line Items]
Average recorded investment		68	5
PNCI
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,626	3,945	4,990
Recorded investment with no related allowance	5,166	3,149	2,570
Recorded investment with related allowance	324	637	656
Total recorded investment	5,490	3,786	3,226
Related Allowance	148	394	246
Average recorded investment	4,383	3,355	3,691
Interest income recognized	152	87	207
PNCI | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	4,214	2,557	3,485
Recorded investment with no related allowance	4,161	2,474	1,802
Total recorded investment	4,161	2,474	1,802
Average recorded investment	2,981	1,902	2,242
Interest income recognized	143	58	188
PNCI | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	1,231	1,388	1,385
Recorded investment with no related allowance	892	675	655
Recorded investment with related allowance	264	637	649
Total recorded investment	1,156	1,312	1,304
Related Allowance	88	394	239
Average recorded investment	1,255	1,453	1,389
Interest income recognized	9	29	18
PNCI | Commercial
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	181		120
Recorded investment with no related allowance	113		113
Recorded investment with related allowance	60		7
Total recorded investment	173		120
Related Allowance	60		7
Average recorded investment	147		60
Interest income recognized			1
PNCI | Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	959	1,302	375
Recorded investment with no related allowance	908	1,219	334
Total recorded investment	908	1,219	334
Average recorded investment	621	1,275	529
Interest income recognized	9		5
PNCI | Home equity loans | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	395	296	252
Recorded investment with no related allowance	376	50	47
Recorded investment with related allowance	0	239	197
Total recorded investment	376	289	244
Related Allowance	0	145	101
Average recorded investment	308	287	155
Interest income recognized	9	9
PNCI | Other | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	95	240	106
Recorded investment with no related allowance	72		21
Recorded investment with related allowance	23	240	85
Total recorded investment	95	240	106
Related Allowance	4	100	11
Average recorded investment	103	257	114
Interest income recognized		7
PNCI | Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	3,255	1,255	3,110
Recorded investment with no related allowance	3,253	1,255	1,468
Total recorded investment	3,253	1,255	1,468
Average recorded investment	2,360	627	1,713
Interest income recognized	134	58	183
PNCI | Home equity lines of credit | Consumer
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	741	852	1,027
Recorded investment with no related allowance	444	625	587
Recorded investment with related allowance	241	158	367
Total recorded investment	685	783	954
Related Allowance	84	149	127
Average recorded investment	$ 844	909	1,120
Interest income recognized		$ 13	$ 18

Allowance for Loan Losses - Tro

Allowance for Loan Losses - Troubled Debt Restructurings (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)SecurityLoanInvestmentsecurities	Sep. 30, 2018USD ($)SecurityLoanInvestmentsecurities	Sep. 30, 2019USD ($)SecurityLoanBranchesInvestmentsecurities	Sep. 30, 2018USD ($)SecurityLoan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | SecurityLoan	4,000	7	18	13
Pre-mod outstanding principal balance	$ 706,000	$ 2,007,000	$ 2,851,000	$ 3,094,000
Post-mod outstanding principal balance	715,000	2,005,000	2,829,000	3,101,000
Financial impact due to TDR taken as additional provision	$ 28,000	$ (308,000)	$ 59,000	$ (265,000)
Number that defaulted during the period		1,000	1	6
Recorded investment of TDRs that defaulted during the period		$ 128,000	$ 7,000	$ 637,000
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions		$ 0		$ (2,000)
Mortgage Loans on Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number	4,000	4	5	6
Pre-mod outstanding principal balance	$ 556,000	$ 1,326,000	$ 719,000	$ 1,743,000
Post-mod outstanding principal balance	567,000	1,324,000	729,000	1,741,000
Financial impact due to TDR taken as additional provision	$ 30,000	$ (308,000)	$ 30,000	$ (262,000)
Number that defaulted during the period				1
Recorded investment of TDRs that defaulted during the period				$ 169,000
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number	0	1	3	3
Pre-mod outstanding principal balance	$ 0	$ 478,000	$ 214,000	$ 732,000
Post-mod outstanding principal balance	0	$ 478,000	215,000	$ 737,000
Financial impact due to TDR taken as additional provision	$ 0		$ 29,000
Number that defaulted during the period		1,000		1
Recorded investment of TDRs that defaulted during the period		$ 128,000		$ 128,000
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | SecurityLoan	4	2	10	4
Pre-mod outstanding principal balance	$ 150,000	$ 203,000	$ 1,918,000	$ 619,000
Post-mod outstanding principal balance	148,000	203,000	1,885,000	623,000
Financial impact due to TDR taken as additional provision	$ (2,000)	$ 0	$ 0	$ (3,000)
Number that defaulted during the period		0	1	4
Recorded investment of TDRs that defaulted during the period		$ 0	$ 7,000	$ 340,000
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions		$ 0		$ (2,000)
Residential 1-4 family | Mortgage Loans on Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number	2,000		3
Pre-mod outstanding principal balance	$ 496,000		$ 659,000
Post-mod outstanding principal balance	500,000		662,000
Financial impact due to TDR taken as additional provision	$ 30,000		$ 30,000
Home equity loans | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number		1	2	2
Pre-mod outstanding principal balance		$ 478,000	$ 149,000	$ 599,000
Post-mod outstanding principal balance		$ 478,000	147,000	$ 599,000
Financial impact due to TDR taken as additional provision			$ 29,000
Commercial loans | Mortgage Loans on Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number	2,000	4	2	6
Pre-mod outstanding principal balance	$ 60,000	$ 1,326,000	$ 60,000	$ 1,743,000
Post-mod outstanding principal balance	$ 67,000	1,324,000	$ 67,000	1,741,000
Financial impact due to TDR taken as additional provision		$ (308,000)		$ (262,000)
Number that defaulted during the period				1
Recorded investment of TDRs that defaulted during the period				$ 169,000
Home equity lines of credit | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number | SecurityLoan			1	1
Pre-mod outstanding principal balance			$ 65,000	$ 133,000
Post-mod outstanding principal balance			$ 68,000	$ 138,000
Number that defaulted during the period		1,000		1
Recorded investment of TDRs that defaulted during the period		$ 128,000		$ 128,000

Leases - Lease Costs and Other

Leases - Lease Costs and Other Lease Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 1,306	$ 3,924
Short-term lease cost	65	194
Variable lease cost	(13)	(33)
Sublease income	(32)	(98)
Lease, Cost, Total	$ 1,326	$ 3,987

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Operating Lease, Expense	$ 1,161,000	$ 2,937,000
Rental Income, Nonoperating	$ 10,000	$ 31,000

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information Related To Operating Leases (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating cash flows for operating leases	$ 1,236	$ 3,683
ROUA obtained in exchange for operating lease liabilities	$ 0	$ 32,162

Leases - Weighted Average Lease

Leases - Weighted Average Lease Term And Discount Rate Related To Operating Lease (Detail)	Sep. 30, 2019
Leases [Abstract]
Weighted-average remaining lease term	9 years 4 months 24 days
Weighted-average discount rate	3.19%

Leases - Future Minimum Rental

Leases - Future Minimum Rental Payments For Operating Leases (Detail) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
2019	$ 1,180
2020	4,389
2021	4,235
2022	3,896
2023	3,216
Thereafter	16,682
Lessee, Operating Lease, Liability, Payments, Due, Total	33,598
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(5,104)
Lease liability at September 30, 2019	$ 28,494

Deposits - Summary of Balances

Deposits - Summary of Balances of Deposits (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Deposits [Abstract]
Noninterest-bearing demand	$ 1,777,357	$ 1,760,580
Interest-bearing demand	1,222,955	1,252,366
Savings	1,843,873	1,921,324
Time certificates, $250,000 or more	148,449	132,429
Other time certificates	302,773	299,767
Total deposits	$ 5,295,407	$ 5,366,466

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Schedule Of Deposits [Line Items]
Overdrawn deposit balances classified as consumer loans	$ 1,431,000	$ 1,469,000
California
Schedule Of Deposits [Line Items]
Certificate of deposits, included in time certificates, over $250,000	$ 50,000,000	$ 60,000,000

Commitments and Contingencies -

Commitments and Contingencies - Summary of Bank's Commitments and Contingent Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Real estate construction loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	$ 182,701	$ 248,996
Real estate mortgage loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	189,700	140,292
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	12,368	11,346
Commercial loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	325,681	306,191
Consumer loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	512,345	496,575
Deposit account overdraft privilege
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	$ 111,187	$ 111,956

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Aug. 21, 2007
Class of Stock [Line Items]
Cash dividends received	$ 7,011,000	$ 13,507,000	$ 25,361,000	$ 22,649,000
Repurchase of common stock (in shares)									500,000
Common stock, shares outstanding	30,512,187		30,512,187			30,417,223
Stock repurchase program cumulative number Of shares repurchased during the deriod			0	0
Market value of shares repurchased under equity compensation plans			$ 4,842,000	$ 1,124,000
2007 Stock Repurchase Plan
Class of Stock [Line Items]
Cumulative number of shares repurchased	196,566		196,566
Common Stock
Class of Stock [Line Items]
Common stock, shares outstanding	30,512,187	30,417,818	30,512,187	30,417,818	30,502,757	30,417,223	23,004,153	22,955,963
Company's common stock in lieu of cash to exercise options to purchase shares (in shares)	3,820	11,630	123,734	28,850
Market value of shares repurchased under equity compensation plans	$ 147,000	$ 453,000	$ 4,842,000	$ 1,124,000

Stock Options and Other Equit_3

Stock Options and Other Equity-Based Incentive Instruments - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Apr. 16, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Weighted-average remaining contractual term (in years)	1 year 2 months 12 days
Number of units released		0
Number of units increased		76,968
Restricted Stock Units (RSUs) | Market Plus Service Condition Vesting RSUs
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of units outstanding expected to vest (in shares)	51,312	51,312		45,536
Weighted-average remaining contractual term (in years)		1 year 10 months 24 days
Pre-tax compensation costs	$ 1,045,845	$ 1,045,845
Number of units released		(22,237)
Restricted Stock Units (RSUs) | Service Condition Vesting RSUs
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of units outstanding expected to vest (in shares)	70,828	70,828		66,947
Pre-tax compensation costs	$ 2,135,210	$ 2,135,210
Number of units released		30,461
2019 Plan
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Aggregate number of shares of TriCo's common stock issued (in shares)			1,500,000

Stock Options and Other Equit_4

Stock Options and Other Equity-Based Incentive Instruments - Stock Option Activity (Detail)	9 Months Ended
	Sep. 30, 2019$ / sharesshares	Dec. 31, 2018$ / shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options outstanding at December 31, 2018 (in shares) | shares	343,000
Options exercised (in shares) | shares	(166,000)
Options outstanding at September 30, 2019 (in shares) | shares	177,000
Weighted Average Exercise Price at December 31, 2018 (in USD per share)	$ 16.67
Weighted Average Exercise Price of Options Exercised (in USD per share)	15.93
Weighted Average Exercise Price at September 30, 2019 (in USD per share)	17.52
Minimum
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Share based compensation arrangements by share based payment award options outstanding option price per share (in USD per share)	14.54	$ 12.63
Share based compensation arrangements by share based payment award options outstanding option price per share of options exercised (in USD per share)	12.63
Maximum
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Share based compensation arrangements by share based payment award options outstanding option price per share (in USD per share)	23.21	$ 23.21
Share based compensation arrangements by share based payment award options outstanding option price per share of options exercised (in USD per share)	$ 19.46

Stock Options and Other Equit_5

Stock Options and Other Equity-Based Incentive Instruments - Summary of Options Outstanding (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options (in shares)	177,000	343,000
Weighted average exercise price (in USD per share)	$ 17.52	$ 16.67
Intrinsic value (in thousands)	$ 3,326
Weighted average remaining contractual term (in years)	2 years 10 months 24 days
Currently Exercisable
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options (in shares)	176,625
Weighted average exercise price (in USD per share)	$ 17.50
Intrinsic value (in thousands)	$ 3,321
Weighted average remaining contractual term (in years)	2 years 10 months 24 days
Currently Not Exercisable
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options (in shares)	375
Weighted average exercise price (in USD per share)	$ 23.21
Intrinsic value (in thousands)	$ 5
Weighted average remaining contractual term (in years)	5 years

Stock Options and Other Equit_6

Stock Options and Other Equity-Based Incentive Instruments - Restricted Stock Unit (RSU) Activity (Detail)	9 Months Ended
	Sep. 30, 2019shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs released (in shares)	0
Restricted Stock Units (RSUs) | Market Plus Service Condition Vesting RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at December 31, 2018 (in shares)	45,536
RSUs granted (in shares)	22,898
RSUs added through dividend and performance credits (in shares)	7,414
RSUs released (in shares)	22,237
RSUs forfeited/expired (in shares)	(2,299)
Outstanding at September 30, 2019 (in shares)	51,312
Restricted Stock Units (RSUs) | Service Condition Vesting RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at December 31, 2018 (in shares)	66,947
RSUs granted (in shares)	35,272
RSUs added through dividend and performance credits (in shares)	946
RSUs released (in shares)	(30,461)
RSUs forfeited/expired (in shares)	(1,876)
Outstanding at September 30, 2019 (in shares)	70,828

Noninterest Income and Expens_2

Noninterest Income and Expense - Components of Other Noninterest Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 10,590	$ 9,743	$ 29,788	$ 28,327
Increase in cash value of life insurance	773	732	2,294	1,996
Asset management and commission income	721	728	2,102	2,414
Gain on sale of loans	1,236	539	2,223	1,831
Lease brokerage income	172	186	631	514
Sale of customer checks	126	88	401	327
Gain on sale of investment securities	107	207	107	207
Gain (loss) on marketable equity securities	22	(22)	100	(92)
Other	361	135	1,688	942
Total other non-interest income	3,518	2,593	9,546	8,139
Total non-interest income	14,108	12,336	39,334	36,466
ATM and Interchange Fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	5,427	4,590	15,412	13,335
Service Charges on Deposit Accounts
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	4,327	4,015	12,389	11,407
Other Service Fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	808	676	2,198	2,020
Mortgage Banking Service Fees
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	483	499	1,441	1,527
Change in Value of Mortgage Servicing Rights
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ (455)	$ (37)	$ (1,652)	$ 38

Noninterest Income and Expens_3

Noninterest Income and Expense - Components of Noninterest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Base salaries, net of deferred loan origination costs	$ 17,656	$ 15,685	$ 51,624	$ 44,076
Incentive compensation	3,791	4,515	10,064	9,126
Benefits and other compensation costs	5,452	5,623	17,058	15,726
Total salaries and benefits expense	26,899	25,823	78,746	68,928
Occupancy	3,711	3,173	11,223	8,574
Data processing and software	3,411	2,786	10,114	7,979
Equipment	1,679	1,750	5,298	4,938
Intangible amortization	1,431	1,390	4,293	2,068
Advertising	1,358	1,341	4,222	3,214
ATM and POS network charges	1,343	1,197	3,936	3,860
Professional fees	999	1,352	2,895	2,898
Telecommunications	867	819	2,437	2,201
Regulatory assessments and insurance	94	537	1,095	1,384
Merger and acquisition expense	0	4,150	0	5,227
Postage	438	275	1,063	934
Operational losses	228	217	679	763
Courier service	357	278	1,039	769
Gain on sale of foreclosed assets	(50)	(2)	(246)	(390)
Gain (Loss) on Disposition of Assets	2	152	82	206
Other miscellaneous expense	3,577	2,290	11,617	9,673
Total other non-interest expense	19,445	21,705	59,747	54,298
Total non-interest expense	$ 46,344	$ 47,528	$ 138,493	$ 123,226

Earnings Per Share - Computatio

Earnings Per Share - Computation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 23,395	$ 16,170	$ 69,182	$ 45,109
Average number of common shares outstanding (in shares)	30,509	30,011	30,464	25,317
Effect of dilutive stock options and restricted stock (in shares)	120	280	179	300
Average number of common shares outstanding used to calculate diluted earnings per share (in shares)	30,629	30,291	30,643	25,617
Options excluded from diluted earnings per share because the effect of these options was antidilutive (in shares)	42	10	42	10

Comprehensive Income - Componen

Comprehensive Income - Components of Other Comprehensive Income (Loss) and Related Tax Effects (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Comprehensive Income (Loss)
Unrealized holding gains (losses) on available for sale securities before reclassifications	$ 5,355	$ (8,193)	$ 27,618	$ (29,134)
Amounts reclassified out of accumulated other comprehensive income:
Realized (gain) loss on debt securities	(107)	(207)	(107)	(207)
Total amounts reclassified out of accumulated other comprehensive income	(107)	(207)	(107)	(570)
Unrealized holding gains (losses) on available for sale securities after reclassifications	5,248	(8,400)	27,511	(29,704)
Tax effect	(1,551)	2,483	(8,133)	8,763
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	3,697	(5,917)	19,378	(20,941)
Change in unfunded status of the supplemental retirement plans before reclassifications	(89)	0	(266)	668
Amounts reclassified out of accumulated other comprehensive income:
Amortization of prior service cost	(13)	(13)	(40)	(40)
Amoritzation of actuarial losses	102	128	306	382
Total amounts reclassified out of accumulated other comprehensive income	89	115	266	(326)
Change in unfunded status of the supplemental retirement plans after reclassifications		115		342
Tax effect		(34)		(101)
Change in unfunded status of the supplemental retirement plans, net of tax	0	81	0	241
Other comprehensive income (loss)	$ 3,697	$ (5,836)	$ 19,378	(20,700)
ASU 2016-01
Amounts reclassified out of accumulated other comprehensive income:
Total amounts reclassified out of accumulated other comprehensive income				62
ASU 2018-02
Amounts reclassified out of accumulated other comprehensive income:
Total amounts reclassified out of accumulated other comprehensive income				(425)
Amounts reclassified out of accumulated other comprehensive income:
Total amounts reclassified out of accumulated other comprehensive income				$ (668)

Comprehensive Income - Compon_2

Comprehensive Income - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax	$ 1,499	$ (17,879)
Net Unrealized Loss on Available for Sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	6,537	(20,974)
Accumulated other comprehensive loss, tax effect	(1,932)	6,201
Accumulated other comprehensive income (loss), net of tax	4,605	(14,773)
Unfunded Status of Supplemental Retirement Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	(4,802)	(4,802)
Accumulated other comprehensive loss, tax effect	1,420	1,420
Accumulated other comprehensive income (loss), net of tax	(3,382)	(3,382)
Joint Beneficiary Agreement Liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	276	276
Accumulated other comprehensive income (loss), net of tax	$ 276	$ 276

Fair Value Measurement - Record

Fair Value Measurement - Recorded Amount of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value Measurements on Recurring Basis [Member] - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 1,000,730	$ 1,128,695
Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,974	2,874
Obligations of U.S. Government Agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	495,637	629,981
Obligations of States and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	111,910	126,072
Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	4,528	4,478
Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	372,005	354,505
Loans Held For Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	7,604	3,687
Mortgage Servicing Rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,072	7,098
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,974	2,874
Level 1 | Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,974	2,874
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	991,684	1,118,723
Level 2 | Obligations of U.S. Government Agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	495,637	629,981
Level 2 | Obligations of States and Political Subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	111,910	126,072
Level 2 | Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	4,528	4,478
Level 2 | Asset-backed Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	372,005	354,505
Level 2 | Loans Held For Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	7,604	3,687
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,072	7,098
Level 3 | Mortgage Servicing Rights
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 6,072	$ 7,098

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019USD ($)Investmentsecurities
Fair Value Disclosures [Abstract]
Number of investment securities classified as level 3 (in investment securities) | Investmentsecurities	0
Transfers between level 1 to level 2, Assets	$ 0
Carrying value of loans fully charged-off	$ 0

Fair Value Measurement - Assets

Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Impaired Originated & PNCI Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 1,055		$ 281
Fair Value Nonrecurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,472	$ 1,308	1,592
Total Gains/(Losses)	(679)	(831)	(302)
Fair Value Nonrecurring Basis | Impaired Originated & PNCI Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,055	445	281
Total Gains/(Losses)	(652)	(808)	(294)
Fair Value Nonrecurring Basis | Foreclosed Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	417	863	1,311
Total Gains/(Losses)	(27)	(23)	(8)
Fair Value Nonrecurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,472	1,308	1,592
Fair Value Nonrecurring Basis | Level 3 | Impaired Originated & PNCI Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,055	445	281
Fair Value Nonrecurring Basis | Level 3 | Foreclosed Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 417	$ 863	$ 1,311

Fair Value Measurement - Estima

Fair Value Measurement - Estimated Fair Values of Financial Instruments that are Reported at Amortized Cost in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial assets:
Cash and due from banks	$ 118,960	$ 119,781
Cash at Federal Reserve and other banks	140,087	107,752
Securities held to maturity	393,449	444,936
Loans held for sale	7,604	3,687
Financial liabilities:
Other borrowings	16,423	15,839
Junior subordinated debt	57,180	57,042
Level 3 | Overdraft Privilege Commitments
Off-balance sheet:
Contract amount, Off-balance sheet	111,187	111,956
Level 3 | Standby letters of credit
Off-balance sheet:
Contract amount, Off-balance sheet	12,368	11,346
Level 3 | Commitments
Off-balance sheet:
Contract amount, Off-balance sheet	1,210,427	1,192,054
Fair Value | Level 3
Financial assets:
Loans, net	4,137,528	4,006,986
Financial liabilities:
Junior subordinated debt	56,209	62,610
Fair Value | Level 3 | Overdraft Privilege Commitments
Off-balance sheet:
Fair value, Off-balance sheet	1,112	1,120
Fair Value | Level 3 | Standby letters of credit
Off-balance sheet:
Fair value, Off-balance sheet	124	113
Fair Value | Level 3 | Commitments
Off-balance sheet:
Fair value, Off-balance sheet	12,104	11,921
Fair Value | Level 1
Financial assets:
Cash and due from banks	118,960	119,781
Cash at Federal Reserve and other banks	140,087	107,752
Fair Value | Level 2
Financial assets:
Securities held to maturity	399,699	437,370
Loans held for sale	7,604	4,616
Financial liabilities:
Deposits	5,294,348	5,362,173
Other borrowings	16,423	15,839
Carrying Amount | Level 3
Financial assets:
Loans, net	4,150,811	3,989,432
Financial liabilities:
Junior subordinated debt	57,180	57,042
Carrying Amount | Level 1
Financial assets:
Cash and due from banks	118,960	119,781
Cash at Federal Reserve and other banks	140,087	107,752
Carrying Amount | Level 2
Financial assets:
Securities held to maturity	393,449	444,936
Restricted equity securities	17,250	17,250
Loans held for sale	7,604	3,687
Financial liabilities:
Deposits	5,295,407	5,366,466
Other borrowings	$ 16,423	$ 15,839

Regulatory Matters - Actual and

Regulatory Matters - Actual and Required Capital Ratios of Bank (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of Capitalization [Line Items]
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	8.00%
Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%
Parent
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets)	$ 735,884	$ 682,419
Tier 1 Capital (to Risk Weighted Assets)	701,703	647,262
Common Equity Tier 1 Capital (to Risk Weighted Assets)	646,240	591,933
Tier 1 Capital (to Average Assets)	$ 701,703	$ 647,262
Total Capital Ratio (to Risk Weighted Assets)	15.23%	14.40%
Tier 1 Capital Ratio (to Risk Weighted Assets)	14.52%	13.66%
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets)	13.37%	12.49%
Tier 1 Capital Ratio (to Average Assets)	11.31%	10.68%
Parent | Basel III Fully Phased In
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement	$ 507,335	$ 497,486
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	410,700	402,727
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	338,224	331,658
Tier 1 Capital (to Average Assets), Minimum Capital Requirement	$ 248,073	$ 242,452
Total Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	10.50%	10.50%
Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	8.50%	8.50%
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	7.00%	7.00%
Tier 1 Capital Ratio (to Average Assets), Minimum Capital Requirement	4.00%	4.00%
Parent | Basel Three Phased In Schedule
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement		$ 467,874
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement		373,115
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement		302,045
Tier 1 Capital (to Average Assets), Minimum Capital Requirement		$ 242,452
Total Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement		9.875%
Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement		7.875%
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement		6.375%
Tier 1 Capital Ratio (to Average Assets), Minimum Capital Requirement		4.00%
Tri Countries Bank
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets)	$ 731,359	$ 680,624
Tier 1 Capital (to Risk Weighted Assets)	697,178	645,467
Common Equity Tier 1 Capital (to Risk Weighted Assets)	697,178	645,467
Tier 1 Capital (to Average Assets)	$ 697,178	$ 645,467
Total Capital Ratio (to Risk Weighted Assets)	15.14%	14.37%
Tier 1 Capital Ratio (to Risk Weighted Assets)	14.43%	13.63%
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets)	14.43%	13.63%
Tier 1 Capital Ratio (to Average Assets)	11.24%	10.65%
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 483,002	$ 473,624
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	386,401	378,899
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	313,951	307,856
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions	310,085	303,059
Tri Countries Bank | Basel III Fully Phased In
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement	507,152	497,305
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	410,551	402,581
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement	338,101	331,537
Tier 1 Capital (to Average Assets), Minimum Capital Requirement	$ 248,068	$ 242,447
Total Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	10.50%	10.50%
Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	8.50%	8.50%
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement	7.00%	7.00%
Tier 1 Capital Ratio (to Average Assets), Minimum Capital Requirement	4.00%	4.00%
Tri Countries Bank | Basel Three Phased In Schedule
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement		$ 467,704
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement		372,979
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement		301,935
Tier 1 Capital (to Average Assets), Minimum Capital Requirement		$ 242,447
Total Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement		9.875%
Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement		7.875%
Common Equity Tier 1 Capital Ratio (to Risk Weighted Assets), Minimum Capital Requirement		6.375%
Tier 1 Capital Ratio (to Average Assets), Minimum Capital Requirement		4.00%