TriCo Bancshares (TCBK) 10-Q 9 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 05, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000356171
Current Fiscal Year End Date	--12-31
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2019
Entity Registrant Name	TRICO BANCSHARES /
Entity File Number	000-10661
Entity Tax Identification Number	94-2792841
Entity Incorporation, State or Country Code	CA
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
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
Trading Symbol	TCBK
Security Exchange Name	NASDAQ
Title of 12(b) Security	Common Stock
Entity Common Stock, Shares Outstanding		30,509,637

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets:
Cash and due from banks	$ 106,939	$ 119,781
Cash at Federal Reserve and other banks	68,643	107,752
Cash and cash equivalents	175,582	227,533
Investment securities:
Marketable equity securities	2,952	2,874
Available for sale debt securities	1,133,994	1,115,036
Held to maturity debt securities	412,524	444,936
Restricted equity securities	17,250	17,250
Loans held for sale	5,875	3,687
Loans	4,103,687	4,022,014
Allowance for loan losses	(32,868)	(32,582)
Total loans, net	4,070,819	3,989,432
Premises and equipment, net	88,534	89,347
Cash value of life insurance	116,606	117,318
Accrued interest receivable	20,990	19,412
Goodwill	220,972	220,972
Other intangible assets, net	26,418	29,280
Operating leases, right-of-use	30,030
Other assets	72,626	75,364
Total assets	6,395,172	6,352,441
Deposits:
Noninterest-bearing demand	1,780,339	1,760,580
Interest-bearing	3,561,834	3,605,886
Total deposits	5,342,173	5,366,466
Accrued interest payable	2,665	1,997
Operating lease liability	29,434
Other liabilities	74,590	83,724
Other borrowings	13,292	15,839
Junior subordinated debt	57,132	57,042
Total liabilities	5,519,286	5,525,068
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock, no par value: 1,000,000 shares authorized, zero issued and outstanding at June 30, 2019 and December 31, 2018	0
Common stock, no par value: 50,000,000 shares authorized; 30,502,757 and 30,417,223 issued and outstanding at June 30, 2019 and December 31, 2018, respectively	542,939	541,762
Retained earnings	335,145	303,490
Accumulated other comprehensive loss, net of tax	(2,198)	(17,879)
Total shareholders' equity	875,886	827,373
Total liabilities and shareholders' equity	$ 6,395,172	$ 6,352,441

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, no par value	$ 0	$ 0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	30,502,757	30,417,223
Common stock, shares outstanding	30,502,757	30,417,223

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest and dividend income:
Loans, including fees	$ 55,491	$ 39,304	$ 109,889	$ 77,353
Investments:
Taxable securities	10,457	7,438	21,012	14,760
Tax exempt securities	1,061	1,042	2,134	2,083
Dividends	305	298	665	634
Interest bearing cash at Federal Reserve and other banks	866	396	1,937	769
Total interest and dividend income	68,180	48,478	135,637	95,599
Interest expense:
Deposits	2,999	1,234	5,718	2,330
Other borrowings	37	586	50	928
Junior subordinated debt	829	789	1,684	1,486
Total interest expense	3,865	2,609	7,452	4,744
Net interest income	64,315	45,869	128,185	90,855
Provision for (reversal of) loan losses	537	(638)	(1,063)	(874)
Net interest income after provision for (benefit from reversal of) loan losses	63,778	46,507	129,248	91,729
Noninterest income:
Service charges and fees	10,128	9,228	19,198	18,584
Gain on sale of loans	575	666	987	1,292
Asset management and commission income	739	810	1,381	1,686
Increase in cash value of life insurance	746	656	1,521	1,264
Other	1,390	814	2,355	1,638
Total noninterest income	13,578	12,174	25,442	24,464
Noninterest expense:
Salaries and related benefits	26,719	21,453	51,847	43,105
Other	20,133	16,417	40,518	32,927
Total noninterest expense	46,852	37,870	92,365	76,032
Income before provision for income taxes	30,504	20,811	62,325	40,161
Provision for income taxes	7,443	5,782	16,538	11,222
Net income	$ 23,061	$ 15,029	$ 45,787	$ 28,939
Earnings per share:
Basic	$ 0.76	$ 0.65	$ 1.50	$ 1.26
Diluted	$ 0.75	$ 0.65	$ 1.49	$ 1.24

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 23,061	$ 15,029	$ 45,787	$ 28,939
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on available for sale securities arising during the period	6,729	(3,998)	15,681	(15,024)
Change in minimum pension liability		80		160
Other comprehensive income (loss)	6,729	(3,918)	15,681	(14,864)
Comprehensive income	$ 29,790	$ 11,111	$ 61,468	$ 14,075

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2017	$ 505,808	$ 255,836	$ 255,200	$ (5,228)
Beginning balance, shares at Dec. 31, 2017		22,955,963
Net income	28,939		28,939
Adoption ASU | ASU 2016-01 [Member]			(62)	62
Adoption ASU | ASU 2018-02 [Member]			1,093	(1,093)
Other comprehensive income (loss)	(14,864)			(14,864)
Stock option vesting	54	$ 54
Stock options exercised	223	$ 223
Stock options exercised, shares		14,500
RSU vesting	471	$ 471
PSU vesting, value	197	$ 197
RSUs released, shares		25,398
PSUs released, shares		25,512
Repurchase of common stock, value	(671)	$ (191)	(480)
Repurchase of common stock, shares		(17,220)
Dividends paid	(7,813)		(7,813)
Ending balance at Jun. 30, 2018	512,344	$ 256,590	276,877	(21,123)
Ending balance, shares at Jun. 30, 2018		23,004,153
Beginning balance at Mar. 31, 2018	505,256	$ 256,226	266,235	(17,205)
Beginning balance, shares at Mar. 31, 2018		22,956,323
Net income	15,029		15,029
Other comprehensive income (loss)	(3,918)			(3,918)
Stock option vesting	17	$ 17
Stock options exercised	223	$ 223
Stock options exercised, shares		14,500
RSU vesting	233	$ 233
PSU vesting, value	81	$ 81
RSUs released, shares		24,904
PSUs released, shares		25,512
Repurchase of common stock, value	(667)	$ (190)	(477)
Repurchase of common stock, shares		(17,086)
Dividends paid	(3,910)		(3,910)
Ending balance at Jun. 30, 2018	512,344	$ 256,590	276,877	(21,123)
Ending balance, shares at Jun. 30, 2018		23,004,153
Beginning balance at Dec. 31, 2018	$ 827,373	$ 541,762	303,490	(17,879)
Beginning balance, shares at Dec. 31, 2018	30,417,223	30,417,223
Net income	$ 45,787		45,787
Other comprehensive income (loss)	15,681			15,681
Stock option vesting	0
Stock options exercised	$ 2,500	$ 2,500
Stock options exercised, shares	157,000	157,000
RSU vesting	$ 567	$ 567
PSU vesting, value	248	$ 248
RSUs released, shares		26,211
PSUs released, shares		22,237
Repurchase of common stock, value	(4,695)	$ (2,138)	(2,557)
Repurchase of common stock, shares		(119,914)
Dividends paid	(11,575)		(11,575)
Ending balance at Jun. 30, 2019	$ 875,886	$ 542,939	335,145	(2,198)
Ending balance, shares at Jun. 30, 2019	30,502,757	30,502,757
Beginning balance at Mar. 31, 2019	$ 853,278	$ 542,340	319,865	(8,927)
Beginning balance, shares at Mar. 31, 2019		30,432,419
Net income	23,061		23,061
Other comprehensive income (loss)	6,729			6,729
Stock option vesting	0
Stock options exercised	1,853	$ 1,853
Stock options exercised, shares		116,000
RSU vesting	289	$ 289
PSU vesting, value	129	$ 129
RSUs released, shares		25,856
PSUs released, shares		22,237
Repurchase of common stock, value	(3,660)	$ (1,672)	(1,988)
Repurchase of common stock, shares		(93,755)
Dividends paid	(5,793)		(5,793)
Ending balance at Jun. 30, 2019	$ 875,886	$ 542,939	$ 335,145	$ (2,198)
Ending balance, shares at Jun. 30, 2019	30,502,757	30,502,757

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Retained Earnings [Member]
Dividends paid, per share	$ 0.19	$ 0.17	$ 0.38	$ 0.34

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities:
Net income	$ 45,787	$ 28,939
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	3,582	3,229
Amortization of intangible assets	2,862	678
Reversal of provision for loan losses	(1,063)	(874)
Amortization of investment securities premium, net	1,186	1,340
Originations of loans for resale	(46,936)	(43,389)
Proceeds from sale of loans originated for resale	45,407	45,437
Gain on sale of loans	(987)	(1,292)
Change in market value of mortgage servicing rights	1,197	(75)
Provision for losses on foreclosed assets	62	90
Gain on transfer of loans to foreclosed assets	(97)	0
Gain on sale of foreclosed assets	(199)	(388)
Loss on disposal of fixed assets	80	54
Increase in cash value of life insurance	(1,521)	(1,264)
Gain on life insurance death benefit	(728)
(Gain) loss on marketable equity securities	(78)	70
Equity compensation vesting expense	815	722
Change in:
Interest receivable	(1,578)	(481)
Interest payable	668	245
Other assets and liabilities, net	(14,592)	(97)
Net cash from operating activities	33,867	32,944
Investing activities:
Proceeds from maturities of securities available for sale	39,845	32,906
Proceeds from maturities of securities held to maturity	31,938	36,587
Purchases of securities available for sale	(37,253)	(81,300)
Loan origination and principal collections, net	(80,440)	(131,073)
Proceeds from sale of other real estate owned	1,082	2,150
Proceeds from sale of premises and equipment	11	36
Purchases of premises and equipment	(2,586)	(4,119)
Net cash from investing activities	(47,403)	(144,813)
Financing activities:
Net change in deposits	(24,293)	68,091
Net change in other borrowings	(2,547)	30,673
Repurchase of common stock, net	0	(448)
Dividends paid	(11,575)	(7,813)
Net cash used by financing activities	(38,415)	90,503
Net change in cash and cash equivalents	(51,951)	(21,366)
Cash and cash equivalents and beginning of year	227,533	205,428
Cash and cash equivalents at end of year	175,582	184,062
Supplemental disclosure of noncash activities:
Unrealized gain (loss) on securities available for sale	22,263	(21,304)
Loans transferred to foreclosed assets	116	0
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	4,695	671
Obligations incurred in conjunction with leased assets	156	0
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	6,982	4,499
Cash paid for income taxes	$ 22,000	$ 8,525

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 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 two 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 $1,716,000 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 consolidtated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K 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 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 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. 2016-02, Leases (Topic 842) 2016-02, on-balance 2018-11, 2018-20, 2019-01. 2018-11, right-of-use 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 2016-02 The FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Topic 310). 2017-08 non-pooled 2017-08 2017-08 Accounting Standards Pending Adoption The FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326) FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other: Simplifying the Test for Goodwill Impairment (Topic 350): 2017-04 2017-04 In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” 2018-13 2018-13 In August 2018, the FASB issued ASU No. 2018-14, “Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans 2018-14 2018-14

Business Combinations

Business Combinations	6 Months Ended
	Jun. 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 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. 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 non-deductible. are included in the consolidated statements of income for the three and six months ended June , . There have been acquisition costs incurred during the six months ended June , . 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 July 6, 2018 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 15,133 Short-term borrowings - Federal Home Loan Bank 165,000 Total liabilities assumed 1,172,068 Total net assets acquired 134,471 Goodwill recognized $ 156,661 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 July 6, 2018 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 1,389 Goodwill $ 156,661 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	6 Months Ended
	Jun. 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: June 30, 2019 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 627,996 $ 5,193 $ (2,278 ) $ 630,911 Obligations of states and political subdivisions 123,626 2,462 (108 ) 125,980 Corporate bonds 4,407 114 — 4,521 Asset backed securities 376,676 252 (4,346 ) 372,582 Total debt securities available for sale $ 1,132,705 $ 8,021 $ (6,732 ) $ 1,133,994 Debt Securities Held to Maturity Obligations of U.S. government agencies $ 398,714 $ 3,661 $ (1,199 ) $ 401,176 Obligations of states and political subdivisions 13,810 290 — 14,100 Total debt securities held to maturity $ 412,524 $ 3,951 $ (1,199 ) $ 415,276 December 31, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (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 There were no sales of investment securities during the six months ended June 30, 2019 and 2018. Investment securities with an aggregate carrying value of $569,296,000 and $597,591,000 at June 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 June 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 June 30, 2019, obligations of U.S. government corporations and agencies with a cost basis totaling $1,026,710,000 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 June 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 5.1 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 Cost Fair Value Cost Fair Value Due in one year $ 2,415 $ 2,421 $ — $ — Due after one year through five years 14,287 14,636 1,254 1,269 Due after five years through ten years 44,325 45,235 21,922 22,166 Due after ten years 1,071,678 1,071,702 389,348 391,841 Totals $ 1,132,705 $ 1,133,994 $ 412,524 $ 415,276 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 Fair Unrealized Fair Unrealized Fair Unrealized Value Loss Value Loss Value Loss (in thousands) June 30, 2019 Debt Securities Available for Sale Obligations of U.S. government agencies $ — $ — $ 247,286 $ (2,278 ) $ 247,286 $ (2,278 ) Obligations of states and political subdivisions 5,208 (108 ) — — 5,208 (108 ) Corporate Bonds — — — — — — Asset backed securities 340,012 (4,346 ) — — 340,012 (4,346 ) Total debt securities available for sale $ 345,220 $ (4,454 ) $ 247,286 $ (2,278 ) $ 592,506 $ (6,732 ) Debt Securities Held to Maturity Obligations of U.S. government agencies $ — $ — $ 110,702 $ (1,199 ) $ 110,702 $ (1,199 ) Obligations of states and political subdivisions — — — — — — Total debt securities held to maturity $ — $ — $ 110,702 $ (1,199 ) $ 110,702 $ (1,199 ) Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized Value Loss Value Loss Value Loss (in thousands) December 31, 2018 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 June 30, 2019, 46 debt securities representing obligations of U.S. government agencies had unrealized losses with aggregate depreciation of (1.0%) from the Company’s amortized cost basis. Obligations of states and political subdivisions: The unrealized losses on investments in obligations of states and political subdivisions were caused by increases in required yields by investors in these types of securities. 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 June 30, 2019, 13 debt securities representing obligations of states and political subdivisions had unrealized losses with aggregate depreciation of (2.0%) 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 June 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 June 30, 2019, 28 asset backed securities had unrealized losses with aggregate depreciation of (1.3%) from the Company’s amortized cost basis. Marketable equity securities: All unrealized losses recognized during the reporting period were for equity securities still held at June 30, 2019.

Loans

Loans	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Loans	Note 4 – Loans A summary of loan balances follows (in thousands): June 30, 2019 Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 $ 348,737 $ 155,872 $ 1,440 $ 506,049 Commercial 2,005,985 660,737 5,959 2,672,681 Total mortgage loan on real estate 2,354,722 816,609 7,399 3,178,730 Consumer: Home equity lines of credit 294,541 35,231 1,128 330,900 Home equity loans 29,041 2,875 429 32,345 Other 53,340 17,802 1 71,143 Total consumer loans 376,922 55,908 1,558 434,388 Commercial 248,523 24,984 2,538 276,045 Construction: Residential 148,432 9,083 — 157,515 Commercial 56,289 720 — 57,009 Total construction 204,721 9,803 — 214,524 Total loans, net of deferred loan fees and discounts $ 3,184,888 $ 907,304 $ 11,495 $ 4,103,687 Total principal balance of loans owed, net of charge-offs $ 3,193,938 $ 940,627 $ 17,975 $ 4,152,540 Unamortized net deferred loan fees (9,050 ) — — (9,050 ) Discounts to principal balance of loans owed, net of charge-offs — (33,323 ) (6,480 ) (39,803 ) Total loans, net of unamortized deferred loan fees and discounts $ 3,184,888 $ 907,304 $ 11,495 $ 4,103,687 Allowance for loan losses $ (32,273 ) $ (585 ) $ (10 ) $ ( 32,868 ) December 31, 2018 Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 $ 343,796 $ 169,792 $ 1,674 $ 515,262 Commercial 1,910,981 708,401 8,456 2,627,838 Total mortgage loan 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 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 June 30, Six months ended June 30, 2019 2018 2019 2018 Change in accretable yield: Balance at beginning of period $ 5,747 $ 6,022 $ 6,059 $ 6,137 Accretion to interest income (109 ) (261 ) (410 ) (516 ) Reclassification (to) from nonaccretable difference (320 ) 110 (331 ) 250 Balance at end of period $ 5,318 $ 5,871 $ 5,318 $ 5,871

Allowance for Loan Losses

Allowance for Loan Losses	6 Months Ended
	Jun. 30, 2019
Receivables [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 June 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,500 $ (2 ) $ 3 $ 75 $ 2,576 Commercial 12,330 — 10 (241 ) 12,099 Total mortgage loans on real estate 14,830 (2 ) 13 (166 ) 14,675 Consumer: Home equity lines of credit 6,015 — 183 (339 ) 5,859 Home equity loans 1,286 — 171 (215 ) 1,242 Other 1,040 (153 ) 108 456 1,451 Total consumer loans 8,341 (153 ) 462 (98 ) 8,552 Commercial 6,078 (138 ) 85 720 6,745 Construction: Residential 2,408 — — 130 2,538 Commercial 407 — — (49 ) 358 Total construction 2,815 — — 81 2,896 Total $ 32,064 $ (293 ) $ 560 $ 537 $ 32,868 Allowance for Loan Losses – Six Months Ended June 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,676 $ (2 ) $ 5 $ (103 ) $ 2,576 Commercial 12,944 — 1,391 (2,236 ) 12,099 Total mortgage loans on real estate 15,620 (2 ) 1,396 (2,339 ) 14,675 Consumer: Home equity lines of credit 6,042 — 278 (461 ) 5,859 Home equity loans 1,540 — 258 (556 ) 1,242 Other 793 (360 ) 183 835 1,451 Total consumer loans 8,375 (360 ) 719 (182 ) 8,552 Commercial 6,090 (657 ) 253 1,059 6,745 Construction: Residential 1,834 — — 704 2,538 Commercial 663 — — (305 ) 358 Total construction 2,497 — — 399 2,896 Total $ 32,582 $ (1,019 ) $ 2,368 $ (1,063 ) $ 32,868 Allowance for Loan Losses – As of June 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 $ 2,522 $ 54 $ — $ 2,576 Commercial 12,015 84 — 12,099 Total mortgage loans on real estate 14,537 138 — 14,675 Consumer: Home equity lines of credit 5,764 85 10 5,859 Home equity loans 1,181 61 — 1,242 Other 1,433 18 — 1,451 Total consumer loans 8,378 164 10 8,552 Commercial 4,605 2,140 — 6,745 Construction: Residential 2,538 — — 2,538 Commercial 358 — — 358 Total construction 2,896 — — 2,896 Total $ 30,416 $ 2,442 $ 10 $ 32,868 Loans, Net of Unearned fees – As of June 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 $ 500,304 $ 4,305 $ 1,440 $ 506,049 Commercial 2,655,692 11,030 5,959 2,672,681 Total mortgage loans on real estate 3,155,996 15,335 7,399 3,178,730 Consumer: Home equity lines of credit 327,726 2,046 1,128 330,900 Home equity loans 29,860 2,056 429 32,345 Other 70,986 156 1 71,143 Total consumer loans 428,572 4,258 1,558 434,388 Commercial 268,405 5,102 2,538 276,045 Construction: Residential 157,515 — — 157,515 Commercial 57,009 — — 57,009 Total construction 214,524 — — 214,524 Total $ 4,067,497 $ 24,695 $ 11,495 $ 4,103,687 Allowance for Loan Losses – Year Ended December 31, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 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 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 $ 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 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 $ 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 183,384 — — 183,384 Total $ 3,979,744 $ 28,047 $ 14,223 $ 4,022,014 Allowance for Loan Losses – Three Months Ended June 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,170 $ (51 ) $ — $ (128 ) $ 1,991 Commercial 11,495 (15 ) 21 106 11,607 Total mortgage loans on real estate 13,665 (66 ) 21 (22 ) 13,598 Consumer: Home equity lines of credit 5,412 (24 ) 317 (657 ) 5,048 Home equity loans 1,736 — 23 (227 ) 1,532 Other 570 (174 ) 66 95 557 Total consumer loans 7,718 (198 ) 406 (789 ) 7,137 Commercial 6,392 (54 ) 80 (40 ) 6,378 Construction: Residential 1,351 — — 83 1,434 Commercial 847 — — 130 977 Total construction 2,198 — — 213 2,411 Total $ 29,973 $ (318 ) $ 507 $ (638 ) $ 29,524 Allowance for Loan Losses – Six Months Ended June 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,317 $ (52 ) $ — $ (274 ) $ 1,991 Commercial 11,441 (15 ) 36 145 11,607 Total mortgage loans on real estate 13,758 (67 ) 36 (129 ) 13,598 Consumer: Home equity lines of credit 5,800 (104 ) 526 (1,174 ) 5,048 Home equity loans 1,841 — 37 (346 ) 1,532 Other 586 (368 ) 144 195 557 Total consumer loans 8,227 (472 ) 707 (1,325 ) 7,137 Commercial 6,512 (259 ) 130 (5 ) 6,378 Construction: Residential 1,184 — — 250 1,434 Commercial 642 — — 335 977 Total construction 1,826 — — 585 2,411 Total $ 30,323 $ (798 ) $ 873 $ (874 ) $ 29,524 Allowance for Loan Losses – As of June 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 $ 1,794 $ 147 $ 50 $ 1,991 Commercial 11,466 82 59 11,607 Total mortgage loans on real estate 13,260 229 109 13,598 Consumer: Home equity lines of credit 4,754 287 7 5,048 Home equity loans 1,340 192 — 1,532 Other 503 54 — 557 Total consumer loans 6,597 533 7 7,137 Commercial 4,228 2,127 23 6,378 Construction: Residential 1,434 — — 1,434 Commercial 977 — — 977 Total construction 2,411 — — 2,411 Total $ 26,496 $ 2,889 $ 139 $ 29,524 Loans, Net of Unearned fees – As of June 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 $ 376,628 $ 6,344 $ 1,720 $ 384,692 Commercial 1,997,591 11,162 7,595 2,016,348 Total mortgage loans on real estate 2,374,219 17,506 9,315 2,401,040 Consumer: Home equity lines of credit 282,611 2,250 1,575 286,436 Home equity loans 38,074 2,457 455 40,986 Other 23,213 247 43 23,503 Total consumer loans 343,898 4,954 2,073 350,925 Commercial 230,395 4,751 2,473 237,619 Construction: Residential 73,578 — — 73,578 Commercial 83,151 — — 83,151 Total construction 156,729 — — 156,729 Total $ 3,105,241 $ 27,211 $ 13,861 $ 3,146,313 As part of the on-going non-performing 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 • Special Mention • Substandard • Doubtful • Loss The following tables present ending loan balances by loan category and risk grade for the periods indicated: Credit Quality Indicators Originated Loans – As of June 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total Originated Mortgage loans on real estate: Residential 1-4 $ 342,847 $ 1,048 $ 4,842 $ — $ 348,737 Commercial 1,964,292 32,562 9,131 — 2,005,985 Total mortgage loans on real estate 2,307,139 33,610 13,973 — 2,354,722 Consumer: Home equity lines of credit 290,524 1,673 2,344 — 294,541 Home equity loans 26,265 564 2,212 — 29,041 Other 53,044 189 107 — 53,340 Total consumer loans 369,833 2,426 4,663 — 376,922 Commercial 237,025 5,194 5,993 311 248,523 Construction: Residential 148,178 — 254 — 148,432 Commercial 55,958 331 — — 56,289 Total construction 204,136 331 254 — 204,721 Total loans $ 3,118,133 $ 41,561 $ 24,883 $ 311 $ 3,184,888 Credit Quality Indicators PNCI Loans – As of June 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total PNCI Mortgage loans on real estate: Residential 1-4 $ 154,238 $ 864 $ 770 $ — $ 155,872 Commercial 650,821 3,141 6,775 — 660,737 Total mortgage loans on real estate 805,059 4,005 7,545 — 816,609 Consumer: Home equity lines of credit 33,345 795 1,091 — 35,231 Home equity loans 2,727 69 79 — 2,875 Other 17,545 254 3 — 17,802 Total consumer loans 53,617 1,118 1,173 — 55,908 Commercial 24,650 1 333 — 24,984 Construction: Residential 9,083 — — — 9,083 Commercial 475 — 245 — 720 Total construction 9,558 — 245 — 9,803 Total loans $ 892,884 $ 5,124 $ 9,296 $ — $ 907,304 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 $ 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 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 $ 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 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 non-payment Commercial real estate loans generally fall into two categories, owner-occupied and non-owner non-owner Construction loans, whether owner occupied or non-owner 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 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 June 30, 2019 (in thousands) 30-59 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ 635 $ 1,132 $ 758 $ 2,525 $ 346,212 $ 348,737 $ — Commercial 1,022 174 901 2,097 2,003,888 2,005,985 — Total mortgage loans on real estate 1,657 1,306 1,659 4,622 2,350,100 2,354,722 — Consumer: Home equity lines of credit 1,197 557 157 1,911 292,630 294,541 — Home equity loans 565 89 217 871 28,170 29,041 Other 44 13 7 64 53,276 53,340 12 Total consumer loans 1,806 659 381 2,846 374,076 376,922 12 Commercial 1,154 1,560 333 3,047 245,476 248,523 10 Construction: Residential 151 — — 151 148,281 148,432 — Commercial — — — — 56,289 56,289 — Total construction 151 — — 151 204,570 204,721 — Total originated loans $ 4,768 $ 3,525 $ 2,373 $ 10,666 $ 3,174,222 $ 3,184,888 $ 22 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 June 30, 2019 (in thousands) 30-59 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ — $ 682 $ — $ 682 $ 155,190 $ 155,872 $ — Commercial — 195 950 1,145 659,592 660,737 — Total mortgage loans on real estate — 877 950 1,827 814,782 816,609 — Consumer: Home equity lines of credit 101 73 24 198 35,033 35,231 — Home equity loans 62 — — 62 2,813 2,875 — Other 119 — — 119 17,683 17,802 — Total consumer loans 282 73 24 379 55,529 55,908 — Commercial 820 150 113 1,083 23,901 24,984 — Construction: Residential — — — — 9,083 9,083 — Commercial 245 — — 245 475 720 — Total construction 245 — — 245 9,558 9,803 — Total PNCI loans $ 1,347 $ 1,100 $ 1,087 $ 3,534 $ 903,770 $ 907,304 $ — 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 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ 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 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 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ 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 — — — — 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 June 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $289,000 and $341,000, respectively. Interest income actually recognized on these originated loans during the three months ended June 30, 2019 and 2018 was $53,000 and $53,000, respectively. Interest income on PNCI nonaccrual loans that would have been recognized during the three months ended June 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $160,000 and $26,000, respectively. Interest income actually recognized on these PNCI loans during the three months ended June 30, 2019 and 2018 was $111,000 and $12,000. Interest income on originated nonaccrual loans that would have been recognized during the six months ended June 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $568,000 and $626,000, respectively. Interest income actually recognized on these originated loans during the six months ended June 30, 2019 and 2018 was $86,000 and $75,000, respectively. Interest income on PNCI nonaccrual loans that would have been recognized during the six months ended June 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $281,000 and $54,000, respectively. Interest income actually recognized on these PNCI loans during the six months ended June 30, 2019 and 2018 was $171,000 and $11,000. 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 June 30, 2019 As of December 31, 2018 (in thousands) Originated PNCI Total Originated PNCI Total Mortgage loans on real estate: Residential 1-4 $ 3,357 $ 300 $ 3,657 $ 3,244 $ 334 $ 3,578 Commercial 4,354 3,461 7,815 9,263 1,468 10,731 Total mortgage loans on real estate 7,711 3,761 11,472 12,507 1,802 14,309 Consumer: Home equity lines of credit 880 516 1,396 1,429 885 2,314 Home equity loans 1,610 34 1,644 1,722 47 1,769 Other 58 3 61 3 4 7 Total consumer loans 2,548 553 3,101 3,154 936 4,090 Commercial 3,873 183 4,056 3,755 120 3,875 Construction: Residential — — — — — — Commercial — — — — — — Total construction — — — — — — Total non accrual loans $ 14,132 $ 4,497 $ 18,629 $ 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 June 30, 2019 and 2018 was not considered significant for financial reporting purposes. Impaired Originated Loans – As of, or for the Six Months Ended, June 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 4,739 $ 3,705 $ 300 $ 4,005 $ 54 $ 4,291 $ 18 Commercial 7,906 5,103 2,465 7,568 808 10,004 40 Total mortgage loans on real estate 12,645 8,808 2,765 11,573 862 14,295 58 Consumer: Home equity lines of credit 1,333 1,271 — 1,271 — 1,510 8 Home equity loans 2,373 1,571 268 1,839 61 2,003 4 Other 76 3 54 57 13 48 1 Total consumer loans 3,782 2,845 322 3,167 74 3,561 13 Commercial 5,150 1,884 3,035 4,919 1,301 5,065 15 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total $ 21,577 $ 13,537 $ 6,122 $ 19,659 $ 2,237 $ 22,921 $ 86 Impaired PNCI Loans – As of, or for the Six Months Ended, June 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 339 $ 300 $ — $ 300 $ — $ 317 $ — Commercial 5,079 3,462 — 3,462 — 2,465 171 Total mortgage loans on real estate 5,418 3,762 — 3,762 — 2,782 171 Consumer: Home equity lines of credit 612 534 241 775 85 889 — Home equity loans 167 148 69 217 44 229 — Other 62 62 37 99 6 105 — Total consumer loans 841 744 347 1,091 135 1,223 — Commercial 113 113 70 183 70 151 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total $ 6,372 $ 4,619 $ 417 $ 5,036 $ 205 $ 4,156 $ 171 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 $ 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 — — — — — 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 $ 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 — — — — — — — Total $ 4,990 $ 2,570 $ 656 $ 3,226 $ 246 $ 3,691 $ 207 Impaired Originated Loans – As of, or for the Six Months Ended, June 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 5,656 $ 3,947 $ 1,050 $ 4,997 $ 147 $ 4,600 $ 28 Commercial 11,280 9,763 1,076 10,839 82 10,975 9 Total mortgage loans on real estate 16,936 13,710 2,126 15,836 229 15,575 37 Consumer: Home equity lines of credit 1,244 1,108 106 1,214 29 1,315 3 Home equity loans 2,558 1,828 351 2,179 38 1,784 15 Other 3 — 3 3 3 3 — Total consumer loans 3,805 2,936 460 3,396 70 3,102 18 Commercial 4,952 809 3,942 4,751 2,127 4,686 20 Construction: Residential — — — — — 68 — Commercial — — — — — — — Total construction — — — — — 68 — Total $ 25,693 $ 17,455 $ 6,528 $ 23,983 $ 2,426 $ 23,431 $ 75 Impaired PNCI Loans – As of, or for the Six Months Ended, June 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 1,417 $ 1,348 $ — $ 1,348 $ — $ 1,339 $ — Commercial 323 323 — 323 — 161 9 Total mortgage loans on real estate 1,740 1,671 — 1,671 — 1,500 9 Consumer: Home equity lines of credit 1,098 529 506 1,035 258 1,035 2 Home equity loans 293 36 242 278 154 281 — Other 244 — 244 244 51 259 — Total consumer loans 1,635 565 992 1,557 463 1,575 2 Commercial — — — — — — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total $ 3,375 $ 2,236 $ 992 $ 3,228 $ 463 $ 3,075 $ 11 Originated loans classified as TDRs and impaired were $10,998,000​​​​​​​, $10,253,000, and $9,450,000 at June 30, 2019, December 31, 2018, and June 30, 2018, respectively. PNCI loans classified as TDRs and impaired were $811,000, $615,000, and $1,459,000 at June 30, 2019, December 31, 2018 and June 30, 2018, respectively. The Company had no significant obligations to lend additional funds on Originated or PNCI TDRs as of June 30, 2019, December 31, 2018, or June 30, 2018. The following tables show certain information regarding TDRs that occurred during the periods indicated: TDR Information for the Three Months Ended June 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 $ $ $ — — $ — $ — Commercial — — — — — — — Total mortgage loans on real estate — — — — — — — Consumer: Home equity lines of credit 1 65 68 — — — — Home equity loans 1 28 27 27 — — — Other — — — — — — — Total consumer loans 2 93 95 27 — — — Commercial 4 1,754 1,722 2 — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 6 $ 1,847 $ 1,817 $ 29 — $ — $ — TDR Information for the Six Months Ended June 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 1 $ 163 $ 162 $ — — $ — $ — Commercial — — — — — — — Total mortgage loans on real estate 1 163 162 — — — — 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 6 1,768 1,737 2 1 7 — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 10 $ 2,145 $ 2,114 $ 31 1 $ 7 $ — TDR Information for the Three Months Ended June 30, 2018 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 — $ — $ — $ — — $ — $ — Commercial 1 34 34 34 — — — Total mortgage loans on real estate 1 34 34 34 — — — Consumer: Home equity lines of credit — — — — Home equity loans — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial 2 416 421 (2 ) 4 340 (2 ) Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 3 $ 450 $ 455 $ 32 4 $ 340 $ (2 ) TDR Information for the Six Months Ended June 30, 2018 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 — $ — $ — $ — — $ — $ — Commercial 2 417 417 46 1 169 — Total mortgage loans on real estate 2 417 417 46 1 169 — Consumer: Home equity lines of credit 1 133 138 — — — — Home equity loans 1 121 121 — — — — Other — — — — — — — Total consumer loans 2 254 259 — — — — Commercial 2 416 421 (2 ) 4 340 (2 ) Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 6 $ 1,087 $ 1,097 $ 44 5 $ 509 $ (2 ) Modifications classified as TDRs can include one or a combination of the following: rate modifications, term extensions, interest only modifications, either temporary or long-term, payment modifications, and collateral substitutions/additions. For all new TDRs, an impairment analysis is conducted. If the loan is determined to be collateral dependent, any additional amount of impairment will be calculated based on the difference between estimated collectible value and the current carrying balance of the loan. This difference could result in an increased provision and is typically charged off. If the asset is determined not to be collateral dependent, the impairment is measured on the net present value difference between the expected cash flows of the restructured loan and the cash flows which would have been received under the original terms. The effect of this could result in a requirement for additional provision to the reserve. The effect of these required provisions for the period are indicated above. Typically if a

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Note 6 – Leases The Company adopted ASU 2016-02 right-of-use 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 six months ended June 30, 2019: (in thousands) Three months ended Six months ended Operating lease cost $ 1,310 $ 2,621 Short-term lease cost 58 129 Variable lease cost (17 ) (22 ) Sublease income (32 ) (66 ) Total lease cost $ 1,319 $ 2,662 Prior to the adoption of ASU 2016-02, The following table presents supplemental cash flow information related to leases for the six months ended June 30, 2019: (in thousands) Three months ended Six months ended Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,229 $ 2,447 ROUA obtained in exchange for operating lease liabilities $ 156 $ 32,162 The following table presents the weighted average operating lease term and discount rate at June 30, 2019: Weighted-average remaining lease term 9.5 years Weighted-average discount rate 3.18 % At June 30, 2019, future expected operating lease payments are as follows: (in thousands) Periods ending December 31, 2019 $ 2,352 2020 4,387 2021 4,235 2022 3,896 2023 3,216 Thereafter 16,682 34,768 Discount for present value of expected cash flows (5,334 ) Lease liability at June 30, 2019 $ 29,434

Deposits

Deposits	6 Months Ended
	Jun. 30, 2019
Banking and Thrift [Abstract]
Deposits	Note 7 - Deposits A summary of the balances of deposits follows (in thousands): June 30, 2019 December 31, Noninterest-bearing demand $ 1,780,339 $ 1,760,580 Interest-bearing demand 1,263,635 1,252,366 Savings 1,856,749 1,921,324 Time certificates, $250,000 or more 130,061 132,429 Other time certificates 311,389 299,767 Total deposits $ 5,342,173 $ 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 June 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 $1,242,000 and $1,469,000 were classified as consumer loans at June 30, 2019 and December 31, 2018, respectively.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 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) June 30, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 311,850 $ 306,191 Consumer loans 506,448 496,575 Real estate mortgage loans 173,451 140,292 Real estate construction loans 210,143 248,996 Standby letters of credit 11,338 11,346 Deposit account overdraft privilege 108,941 111,956

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2019
Federal Home Loan Banks [Abstract]
Shareholders' Equity	Note 9 – Shareholders’ Equity Dividends Paid The Bank paid to the Company cash dividends in the aggregate amounts of $10,236,000 and $4,770,000 during the three months ended June 30, 2019 and 2018, respectively and $18,350,000 and $9,142,000 during the six months ended June 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 June 30, 2019, the Company had repurchased 196,566 shares under this plan. During the six month periods ended June 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 June 30, 2019 and 2018, employees tendered 93,755 and 17,086 shares, respectively, of the Company’s common stock with market value of $3,659,000, and $667,000, 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 six months ended June 30, 2019 and 2018, employees tendered 119,914 and 17,220 shares, respectively, of the Company’s common stock with market value of $4,695,000, and $671,000, 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 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	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [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 ratified 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 six months ended June 30, 2019 were made from the 2019 Plan. Stock option activity during the six months ended June 30, 2019 is summarized in the following table: Number Option Price Weighted Outstanding at December 31, 2018 343,000 $ 12.63 $ 16.67 Options granted — — to — — Options exercised (157,000 ) $12.63 to $19.46 15.92 Options forfeited — — to — — Outstanding at June 30, 2019 186,000 $14.54 to $23.21 $ 17.45 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 June 30, 2019: Currently Currently Not Total Number of options 185,250 750 186,000 Weighted average exercise price $ 17.43 $ 23.21 $ 17.45 Intrinsic value (in thousands) $ 3,774 $ 11 $ 3,785 Weighted average remaining contractual term (yrs.) 3.1 5.3 3.1 The 750 options that are currently not exercisable as of June 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 six months ended June 30, 2019. Restricted stock unit (RSU) activity is summarized in the following table for the dates indicated: 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 519 7,414 RSUs released (26,211 ) (22,237 ) RSUs forfeited/expired — — Outstanding at June 30, 2019 76,527 53,611 The 76,527 of service condition vesting RSUs outstanding as of June 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 76,527 of service condition vesting RSUs outstanding as of June 30, 2019 are expected to vest, and be released, on a weighted-average basis, over the next 1.4 years. The Company expects to recognize $2,495,000 of pre-tax The 53,611 of market plus service condition vesting RSUs outstanding as of June 30, 2019 are expected to vest, and be released, on a weighted-average basis, over the next 2.1 years. The Company expects to recognize $1,227,000 of pre-tax

Noninterest Income and Expense

Noninterest Income and Expense	6 Months Ended
	Jun. 30, 2019
Other Income and Expenses [Abstract]
Noninterest Income and Expense	Note 11 - Noninterest Income and Expense The following table summarizes the Company’s noninterest income for the periods indicated: Three months ended June 30, Six months ended June 30, (dollars in thousands) 2019 2018 2019 2018 ATM and interchange fees $ 5,404 $ 4,510 $ 9,985 $ 8,745 Service charges on deposit accounts 4,182 3,613 8,062 7,392 Other service fees 619 630 1,390 1,344 Mortgage banking service fees 475 511 958 1,028 Change in value of mortgage servicing rights (552 ) (36 ) (1,197 ) 75 Total service charges and fees 10,128 9,228 19,198 18,584 Increase in cash value of life insurance 746 656 1,521 1,264 Asset management and commission income 739 810 1,381 1,686 Gain on sale of loans 575 666 987 1,292 Lease brokerage income 239 200 459 328 Sale of customer checks 135 138 275 239 Gain on sale of foreclosed assets 197 17 296 388 Gain (loss) on marketable equity securities 42 (23 ) 78 (70 ) Loss on disposal of fixed assets (42 ) (41 ) (80 ) (54 ) Other 819 523 1,327 807 Total other noninterest income 3,450 2,946 6,244 5,880 Total noninterest income $ 13,578 $ 12,174 $ 25,442 $ 24,464 The components of noninterest expense were as follows (in thousands): Three months ended June 30, Six months ended June 30, 2019 2018 2019 2018 Base salaries, net of deferred loan origination costs $ 17,211 $ 14,429 $ 33,968 $ 28,391 Incentive compensation 3,706 2,159 6,273 4,611 Benefits and other compensation costs 5,802 4,865 11,606 10,103 Total salaries and benefits expense 26,719 21,453 51,847 43,105 Occupancy 3,738 2,720 7,512 5,401 Data processing and software 3,354 2,679 6,703 5,193 Equipment 1,752 1,637 3,619 3,188 Intangible amortization 1,431 339 2,862 678 Advertising 1,533 1,035 2,864 1,873 ATM and POS network charges 1,270 1,437 2,593 2,663 Professional fees 1,057 774 1,896 1,546 Telecommunications 773 681 1,570 1,382 Regulatory assessments and insurance 490 417 1,001 847 Merger and acquisition expense — 601 — 1,077 Postage 315 301 625 659 Operational losses 226 252 451 546 Courier service 412 224 682 491 Other miscellaneous expense 3,782 3,320 8,140 7,383 Total other noninterest expense 20,133 16,417 40,518 32,927 Total noninterest expense $ 46,852 $ 37,870 $ 92,365 $ 76,032

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 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 from 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 June 30, (in thousands) 2019 2018 Net income $ 23,061 $ 15,029 Average number of common shares outstanding 30,458 22,983 Effect of dilutive stock options and restricted stock 185 293 Average number of common shares outstanding used to calculate diluted earnings per share 30,643 23,276 Options excluded from diluted earnings per share because the effect of these options was antidilutive — — Six months ended June 30, (in thousands) 2019 2018 Net income $ 45,787 $ 28,939 Average number of common shares outstanding 30,441 22,970 Effect of dilutive stock options and restricted stock 209 310 Average number of common shares outstanding used to calculate diluted earnings 30,650 23,280 Options excluded from diluted earnings per share because the effect of these — —

Comprehensive Income

Comprehensive Income	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Comprehensive Income	Note 13 – 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 The components of other comprehensive income (loss) and related tax effects are as follows: Three months ended June 30, Six months ended June 30, (in thousands) 2019 2018 2019 2018 Unrealized holding gains (losses) on available for sale securities before reclassifications $ 9,553 $ (5,676 ) $ 22,263 $ (20,941 ) Amounts reclassified out of accumulated other comprehensive income: Adoption ASU 2016-01 — — — 62 Adoption ASU 2018-02 — — — (425 ) Total amounts reclassified out of accumulated other comprehensive income — — — (363 ) Unrealized holding gains (losses) on available for sale securities after reclassifications 9,553 (5,676 ) 22,263 (21,304 ) Tax effect (2,824 ) 1,678 (6,582 ) 6,280 Unrealized holding gains (losses) on available for sale securities, net of tax 6,729 (3,998 ) 15,681 (15,024 ) Change in unfunded status of the supplemental retirement plans before reclassifications (89 ) — (177 ) 668 Amounts reclassified out of accumulated other comprehensive income: Amortization of prior service cost (13 ) (13 ) (27 ) (27 ) Amortization of actuarial losses 102 127 204 254 Adoption ASU 2018-02 — — — (668 ) Total amounts reclassified out of accumulated other comprehensive income 89 114 177 (441 ) Change in unfunded status of the supplemental retirement plans after reclassifications — 114 — 227 Tax effect — (34 ) — (67 ) Change in unfunded status of the supplemental retirement plans, net of tax — 80 — 160 Total other comprehensive income (loss) $ 6,729 $ (3,918 ) $ 15,681 $ (14,864 ) The components of accumulated other comprehensive loss, included in shareholders’ equity, are as follows: June 30, December 31, (in thousands) 2019 2018 Net unrealized loss on available for sale securities $ 1,289 $ (20,974 ) Tax effect (381 ) 6,201 Unrealized holding loss on available for sale securities, net of tax 908 (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 loss $ (2,198 ) $ (17,879 )

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 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, 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 not over-the-counter no Loans held for sale Impaired originated and PNCI loans Foreclosed assets Mortgage servicing rights 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 June 30, 2019 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,952 $ 2,952 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 630,911 — 630,911 — Obligations of states and political subdivisions 125,980 — 125,980 — Corporate bonds 4,521 — 4,521 — Asset backed securities 372,582 — 372,582 — Loans held for sale 5,875 — 5,875 — Mortgage servicing rights 6,229 — — 6,229 Total assets measured at fair value $ 1,149,050 $ 2,952 $ 1,139,869 $ 6,229 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 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): Transfers Change Beginning into (out of) Included Ending Three months ended June 30, Balance Level 3 in Earnings Issuances Balance 2019: Mortgage servicing rights $ 6,572 — $ (552 ) $ 209 $ 6,229 2018: Mortgage servicing rights $ 6,953 — $ (36 ) $ 104 $ 7,021 Six months ended June 30, Beginning Balance Transfers into (out of) Level 3 Change Included in Earnings Issuances Ending Balance 2019: Mortgage servicing rights $ 7,098 — $ (1,197 ) $ 328 $ 6,229 2018: Mortgage servicing rights $ 6,687 — $ 75 $ 259 $ 7,021 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 June 30, 2019 and December 31, 2018: Fair Value Valuation Unobservable Range, Weighted As of June 30, 2019: (in thousands) Technique Inputs Average Mortgage Servicing Rights $ 6,229 Discounted cash flow Constant prepayment rate 6.9% - % Discount rate 10% - 14%;12 % As of December 31, 2018: Mortgage Servicing Rights $ 7,098 Discounted cash flow Constant prepayment rate 5.0% - 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): Total Gains June 30, 2019 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 1,164 — — $ 1,164 $ (808 ) Foreclosed assets 454 — — 454 (63 ) Total assets measured at fair value $ 1,618 — — $ 1,618 $ (871 ) Total Gains December 31, 2018 Total Level 1 Level 2 Level 3 (Losses) 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 ) Total Gains June 30, 2018 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 1,647 — — $ 1,647 $ (505 ) Foreclosed assets 584 — — 584 (90 ) Total assets measured at fair value $ 2,231 — — $ 2,231 $ (595 ) 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 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 June 30, 2019: June 30, 2019 Fair Value Valuation Technique Unobservable Inputs Range, Impaired Originated & PNCI loans $ — Sales comparison approach Income approach Adjustment for differences between comparable sales Capitalization rate Not meaningful Foreclosed assets (Residential real estate) $ — Sales comparison approach Adjustment for differences between comparable sales 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 Technique Unobservable Inputs Range, Impaired Originated & PNCI loans $ 281 Sales comparison approach Income approach Adjustment for differences between comparable sales Capitalization rate (16.3%) - Foreclosed assets (Residential real estate) $ 693 Sales comparison approach Adjustment for differences between comparable sales (21.83%) - 7.25%; Foreclosed assets (Commercial real estate) $ 618 Sales comparison approach Adjustment for differences between comparable sales (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. June 30, 2019 December 31, 2018 (in thouands) Carrying Fair Value Carrying Fair Value Financial assets: Level 1 inputs: Cash and due from banks $ 106,939 $ 106,939 $ 119,781 $ 119,781 Cash at Federal Reserve and other banks 68,643 68,643 107,752 107,752 Level 2 inputs: Securities held to maturity 412,524 415,276 444,936 437,370 Restricted equity securities 17,250 N/A 17,250 N/A Loans held for sale 5,875 5,875 3,687 4,616 Level 3 inputs: Loans, net 4,070,819 4,057,792 3,989,432 4,006,986 Financial liabilities: Level 2 inputs: Deposits 5,342,173 5,341,105 5,366,466 5,362,173 Other borrowings 13,292 13,292 15,839 15,839 Level 3 inputs: Junior subordinated debt 57,132 56,209 57,042 62,610 (in thouands) Contract Fair Value Contract Fair Value Off-balance Level 3 inputs: Commitments $ 1,201,892 $ 12,019 $ 1,192,054 $ 11,921 Standby letters of credit 11,338 113 11,346 113 Overdraft privilege commitments 108,941 1,089 111,956 1,120

Regulatory Matters

Regulatory Matters	6 Months Ended
	Jun. 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 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 June 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 June 30, 2019 and December 31, 2018 based on the then phased-in phased-in. Actual Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of June 30, 2019: Total Capital (to Risk Weighted Assets): Consolidated $ 718,901 14.93 % $ 505,569 10.50 % N/A N/A Tri Counties Bank $ 714,018 14.83 % $ 505,385 10.50 % $ 481,320 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 683,043 14.19 % $ 409,270 8.50 % N/A N/A Tri Counties Bank $ 678,160 14.09 % $ 409,122 8.50 % $ 385,056 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 627,627 13.03 % $ 337,046 7.00 % N/A N/A Tri Counties Bank $ 678,160 14.09 % $ 336,924 7.00 % $ 312,858 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 683,043 11.08 % $ 246,599 4.00 % N/A N/A Tri Counties Bank $ 678,160 11.00 % $ 246,594 4.00 % $ 308,242 5.00 % Actual Minimum Capital Phase-in Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of December 31, 2018: 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 June 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 June 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 June 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)	6 Months Ended
	Jun. 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 two 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 $1,716,000 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 consolidtated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K
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
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. 2016-02, Leases (Topic 842) 2016-02, on-balance 2018-11, 2018-20, 2019-01. 2018-11, right-of-use 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 2016-02 The FASB issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Topic 310). 2017-08 non-pooled 2017-08 2017-08
Accounting Standards Pending Adoption	Accounting Standards Pending Adoption The FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326) FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other: Simplifying the Test for Goodwill Impairment (Topic 350): 2017-04 2017-04 In August 2018, the FASB issued ASU No. 2018-13, “Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement.” 2018-13 2018-13 In August 2018, the FASB issued ASU No. 2018-14, “Disclosure Framework - Changes to the Disclosure Requirements for Defined Benefit Plans 2018-14 2018-14

Business Combinations (Tables)

Business Combinations (Tables)	6 Months Ended
	Jun. 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 July 6, 2018 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 15,133 Short-term borrowings - Federal Home Loan Bank 165,000 Total liabilities assumed 1,172,068 Total net assets acquired 134,471 Goodwill recognized $ 156,661
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 July 6, 2018 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 1,389 Goodwill $ 156,661

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 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: June 30, 2019 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (in thousands) Debt Securities Available for Sale Obligations of U.S. government agencies $ 627,996 $ 5,193 $ (2,278 ) $ 630,911 Obligations of states and political subdivisions 123,626 2,462 (108 ) 125,980 Corporate bonds 4,407 114 — 4,521 Asset backed securities 376,676 252 (4,346 ) 372,582 Total debt securities available for sale $ 1,132,705 $ 8,021 $ (6,732 ) $ 1,133,994 Debt Securities Held to Maturity Obligations of U.S. government agencies $ 398,714 $ 3,661 $ (1,199 ) $ 401,176 Obligations of states and political subdivisions 13,810 290 — 14,100 Total debt securities held to maturity $ 412,524 $ 3,951 $ (1,199 ) $ 415,276 December 31, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (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	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. Debt Securities Available for Sale Held to Maturity (In thousands) Amortized Estimated Amortized Estimated Cost Fair Value Cost Fair Value Due in one year $ 2,415 $ 2,421 $ — $ — Due after one year through five years 14,287 14,636 1,254 1,269 Due after five years through ten years 44,325 45,235 21,922 22,166 Due after ten years 1,071,678 1,071,702 389,348 391,841 Totals $ 1,132,705 $ 1,133,994 $ 412,524 $ 415,276
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 Fair Unrealized Fair Unrealized Fair Unrealized Value Loss Value Loss Value Loss (in thousands) June 30, 2019 Debt Securities Available for Sale Obligations of U.S. government agencies $ — $ — $ 247,286 $ (2,278 ) $ 247,286 $ (2,278 ) Obligations of states and political subdivisions 5,208 (108 ) — — 5,208 (108 ) Corporate Bonds — — — — — — Asset backed securities 340,012 (4,346 ) — — 340,012 (4,346 ) Total debt securities available for sale $ 345,220 $ (4,454 ) $ 247,286 $ (2,278 ) $ 592,506 $ (6,732 ) Debt Securities Held to Maturity Obligations of U.S. government agencies $ — $ — $ 110,702 $ (1,199 ) $ 110,702 $ (1,199 ) Obligations of states and political subdivisions — — — — — — Total debt securities held to maturity $ — $ — $ 110,702 $ (1,199 ) $ 110,702 $ (1,199 ) Less than 12 months 12 months or more Total Fair Unrealized Fair Unrealized Fair Unrealized Value Loss Value Loss Value Loss (in thousands) December 31, 2018 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)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of Loan Balances	A summary of loan balances follows (in thousands): June 30, 2019 Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 $ 348,737 $ 155,872 $ 1,440 $ 506,049 Commercial 2,005,985 660,737 5,959 2,672,681 Total mortgage loan on real estate 2,354,722 816,609 7,399 3,178,730 Consumer: Home equity lines of credit 294,541 35,231 1,128 330,900 Home equity loans 29,041 2,875 429 32,345 Other 53,340 17,802 1 71,143 Total consumer loans 376,922 55,908 1,558 434,388 Commercial 248,523 24,984 2,538 276,045 Construction: Residential 148,432 9,083 — 157,515 Commercial 56,289 720 — 57,009 Total construction 204,721 9,803 — 214,524 Total loans, net of deferred loan fees and discounts $ 3,184,888 $ 907,304 $ 11,495 $ 4,103,687 Total principal balance of loans owed, net of charge-offs $ 3,193,938 $ 940,627 $ 17,975 $ 4,152,540 Unamortized net deferred loan fees (9,050 ) — — (9,050 ) Discounts to principal balance of loans owed, net of charge-offs — (33,323 ) (6,480 ) (39,803 ) Total loans, net of unamortized deferred loan fees and discounts $ 3,184,888 $ 907,304 $ 11,495 $ 4,103,687 Allowance for loan losses $ (32,273 ) $ (585 ) $ (10 ) $ ( 32,868 ) December 31, 2018 Originated PNCI PCI Total Mortgage loans on real estate: Residential 1-4 $ 343,796 $ 169,792 $ 1,674 $ 515,262 Commercial 1,910,981 708,401 8,456 2,627,838 Total mortgage loan 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 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 June 30, Six months ended June 30, 2019 2018 2019 2018 Change in accretable yield: Balance at beginning of period $ 5,747 $ 6,022 $ 6,059 $ 6,137 Accretion to interest income (109 ) (261 ) (410 ) (516 ) Reclassification (to) from nonaccretable difference (320 ) 110 (331 ) 250 Balance at end of period $ 5,318 $ 5,871 $ 5,318 $ 5,871

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [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 June 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,500 $ (2 ) $ 3 $ 75 $ 2,576 Commercial 12,330 — 10 (241 ) 12,099 Total mortgage loans on real estate 14,830 (2 ) 13 (166 ) 14,675 Consumer: Home equity lines of credit 6,015 — 183 (339 ) 5,859 Home equity loans 1,286 — 171 (215 ) 1,242 Other 1,040 (153 ) 108 456 1,451 Total consumer loans 8,341 (153 ) 462 (98 ) 8,552 Commercial 6,078 (138 ) 85 720 6,745 Construction: Residential 2,408 — — 130 2,538 Commercial 407 — — (49 ) 358 Total construction 2,815 — — 81 2,896 Total $ 32,064 $ (293 ) $ 560 $ 537 $ 32,868 Allowance for Loan Losses – Six Months Ended June 30, 2019 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,676 $ (2 ) $ 5 $ (103 ) $ 2,576 Commercial 12,944 — 1,391 (2,236 ) 12,099 Total mortgage loans on real estate 15,620 (2 ) 1,396 (2,339 ) 14,675 Consumer: Home equity lines of credit 6,042 — 278 (461 ) 5,859 Home equity loans 1,540 — 258 (556 ) 1,242 Other 793 (360 ) 183 835 1,451 Total consumer loans 8,375 (360 ) 719 (182 ) 8,552 Commercial 6,090 (657 ) 253 1,059 6,745 Construction: Residential 1,834 — — 704 2,538 Commercial 663 — — (305 ) 358 Total construction 2,497 — — 399 2,896 Total $ 32,582 $ (1,019 ) $ 2,368 $ (1,063 ) $ 32,868 Allowance for Loan Losses – As of June 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 $ 2,522 $ 54 $ — $ 2,576 Commercial 12,015 84 — 12,099 Total mortgage loans on real estate 14,537 138 — 14,675 Consumer: Home equity lines of credit 5,764 85 10 5,859 Home equity loans 1,181 61 — 1,242 Other 1,433 18 — 1,451 Total consumer loans 8,378 164 10 8,552 Commercial 4,605 2,140 — 6,745 Construction: Residential 2,538 — — 2,538 Commercial 358 — — 358 Total construction 2,896 — — 2,896 Total $ 30,416 $ 2,442 $ 10 $ 32,868 Loans, Net of Unearned fees – As of June 30, 2019 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 $ 500,304 $ 4,305 $ 1,440 $ 506,049 Commercial 2,655,692 11,030 5,959 2,672,681 Total mortgage loans on real estate 3,155,996 15,335 7,399 3,178,730 Consumer: Home equity lines of credit 327,726 2,046 1,128 330,900 Home equity loans 29,860 2,056 429 32,345 Other 70,986 156 1 71,143 Total consumer loans 428,572 4,258 1,558 434,388 Commercial 268,405 5,102 2,538 276,045 Construction: Residential 157,515 — — 157,515 Commercial 57,009 — — 57,009 Total construction 214,524 — — 214,524 Total $ 4,067,497 $ 24,695 $ 11,495 $ 4,103,687 Allowance for Loan Losses – Year Ended December 31, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 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 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 $ 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 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 $ 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 183,384 — — 183,384 Total $ 3,979,744 $ 28,047 $ 14,223 $ 4,022,014 Allowance for Loan Losses – Three Months Ended June 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,170 $ (51 ) $ — $ (128 ) $ 1,991 Commercial 11,495 (15 ) 21 106 11,607 Total mortgage loans on real estate 13,665 (66 ) 21 (22 ) 13,598 Consumer: Home equity lines of credit 5,412 (24 ) 317 (657 ) 5,048 Home equity loans 1,736 — 23 (227 ) 1,532 Other 570 (174 ) 66 95 557 Total consumer loans 7,718 (198 ) 406 (789 ) 7,137 Commercial 6,392 (54 ) 80 (40 ) 6,378 Construction: Residential 1,351 — — 83 1,434 Commercial 847 — — 130 977 Total construction 2,198 — — 213 2,411 Total $ 29,973 $ (318 ) $ 507 $ (638 ) $ 29,524 Allowance for Loan Losses – Six Months Ended June 30, 2018 (in thousands) Beginning Charge-offs Recoveries Provision Ending Balance Mortgage loans on real estate: Residential 1-4 $ 2,317 $ (52 ) $ — $ (274 ) $ 1,991 Commercial 11,441 (15 ) 36 145 11,607 Total mortgage loans on real estate 13,758 (67 ) 36 (129 ) 13,598 Consumer: Home equity lines of credit 5,800 (104 ) 526 (1,174 ) 5,048 Home equity loans 1,841 — 37 (346 ) 1,532 Other 586 (368 ) 144 195 557 Total consumer loans 8,227 (472 ) 707 (1,325 ) 7,137 Commercial 6,512 (259 ) 130 (5 ) 6,378 Construction: Residential 1,184 — — 250 1,434 Commercial 642 — — 335 977 Total construction 1,826 — — 585 2,411 Total $ 30,323 $ (798 ) $ 873 $ (874 ) $ 29,524 Allowance for Loan Losses – As of June 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total allowance Mortgage loans on real estate: Residential 1-4 $ 1,794 $ 147 $ 50 $ 1,991 Commercial 11,466 82 59 11,607 Total mortgage loans on real estate 13,260 229 109 13,598 Consumer: Home equity lines of credit 4,754 287 7 5,048 Home equity loans 1,340 192 — 1,532 Other 503 54 — 557 Total consumer loans 6,597 533 7 7,137 Commercial 4,228 2,127 23 6,378 Construction: Residential 1,434 — — 1,434 Commercial 977 — — 977 Total construction 2,411 — — 2,411 Total $ 26,496 $ 2,889 $ 139 $ 29,524 Loans, Net of Unearned fees – As of June 30, 2018 (in thousands) Loans pooled Individually Loans acquired Total loans, net Mortgage loans on real estate: Residential 1-4 $ 376,628 $ 6,344 $ 1,720 $ 384,692 Commercial 1,997,591 11,162 7,595 2,016,348 Total mortgage loans on real estate 2,374,219 17,506 9,315 2,401,040 Consumer: Home equity lines of credit 282,611 2,250 1,575 286,436 Home equity loans 38,074 2,457 455 40,986 Other 23,213 247 43 23,503 Total consumer loans 343,898 4,954 2,073 350,925 Commercial 230,395 4,751 2,473 237,619 Construction: Residential 73,578 — — 73,578 Commercial 83,151 — — 83,151 Total construction 156,729 — — 156,729 Total $ 3,105,241 $ 27,211 $ 13,861 $ 3,146,313
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 June 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total Originated Mortgage loans on real estate: Residential 1-4 $ 342,847 $ 1,048 $ 4,842 $ — $ 348,737 Commercial 1,964,292 32,562 9,131 — 2,005,985 Total mortgage loans on real estate 2,307,139 33,610 13,973 — 2,354,722 Consumer: Home equity lines of credit 290,524 1,673 2,344 — 294,541 Home equity loans 26,265 564 2,212 — 29,041 Other 53,044 189 107 — 53,340 Total consumer loans 369,833 2,426 4,663 — 376,922 Commercial 237,025 5,194 5,993 311 248,523 Construction: Residential 148,178 — 254 — 148,432 Commercial 55,958 331 — — 56,289 Total construction 204,136 331 254 — 204,721 Total loans $ 3,118,133 $ 41,561 $ 24,883 $ 311 $ 3,184,888 Credit Quality Indicators PNCI Loans – As of June 30, 2019 (in thousands) Pass Special Substandard Doubtful / Loss Total PNCI Mortgage loans on real estate: Residential 1-4 $ 154,238 $ 864 $ 770 $ — $ 155,872 Commercial 650,821 3,141 6,775 — 660,737 Total mortgage loans on real estate 805,059 4,005 7,545 — 816,609 Consumer: Home equity lines of credit 33,345 795 1,091 — 35,231 Home equity loans 2,727 69 79 — 2,875 Other 17,545 254 3 — 17,802 Total consumer loans 53,617 1,118 1,173 — 55,908 Commercial 24,650 1 333 — 24,984 Construction: Residential 9,083 — — — 9,083 Commercial 475 — 245 — 720 Total construction 9,558 — 245 — 9,803 Total loans $ 892,884 $ 5,124 $ 9,296 $ — $ 907,304 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 $ 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 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 $ 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 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 June 30, 2019 (in thousands) 30-59 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ 635 $ 1,132 $ 758 $ 2,525 $ 346,212 $ 348,737 $ — Commercial 1,022 174 901 2,097 2,003,888 2,005,985 — Total mortgage loans on real estate 1,657 1,306 1,659 4,622 2,350,100 2,354,722 — Consumer: Home equity lines of credit 1,197 557 157 1,911 292,630 294,541 — Home equity loans 565 89 217 871 28,170 29,041 Other 44 13 7 64 53,276 53,340 12 Total consumer loans 1,806 659 381 2,846 374,076 376,922 12 Commercial 1,154 1,560 333 3,047 245,476 248,523 10 Construction: Residential 151 — — 151 148,281 148,432 — Commercial — — — — 56,289 56,289 — Total construction 151 — — 151 204,570 204,721 — Total originated loans $ 4,768 $ 3,525 $ 2,373 $ 10,666 $ 3,174,222 $ 3,184,888 $ 22 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 June 30, 2019 (in thousands) 30-59 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ — $ 682 $ — $ 682 $ 155,190 $ 155,872 $ — Commercial — 195 950 1,145 659,592 660,737 — Total mortgage loans on real estate — 877 950 1,827 814,782 816,609 — Consumer: Home equity lines of credit 101 73 24 198 35,033 35,231 — Home equity loans 62 — — 62 2,813 2,875 — Other 119 — — 119 17,683 17,802 — Total consumer loans 282 73 24 379 55,529 55,908 — Commercial 820 150 113 1,083 23,901 24,984 — Construction: Residential — — — — 9,083 9,083 — Commercial 245 — — 245 475 720 — Total construction 245 — — 245 9,558 9,803 — Total PNCI loans $ 1,347 $ 1,100 $ 1,087 $ 3,534 $ 903,770 $ 907,304 $ — 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 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ 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 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 60-89 > 90 days Total Past Current Total > 90 Days and Mortgage loans on real estate: Residential 1-4 $ 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 — — — — 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 six months ended June 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $568,000 and $626,000, respectively. Interest income actually recognized on these originated loans during the six months ended June 30, 2019 and 2018 was $86,000 and $75,000, respectively. Interest income on PNCI nonaccrual loans that would have been recognized during the six months ended June 30, 2019 and 2018, if all such loans had been current in accordance with their original terms, totaled $281,000 and $54,000, respectively. Interest income actually recognized on these PNCI loans during the six months ended June 30, 2019 and 2018 was $171,000 and $11,000. 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 June 30, 2019 As of December 31, 2018 (in thousands) Originated PNCI Total Originated PNCI Total Mortgage loans on real estate: Residential 1-4 $ 3,357 $ 300 $ 3,657 $ 3,244 $ 334 $ 3,578 Commercial 4,354 3,461 7,815 9,263 1,468 10,731 Total mortgage loans on real estate 7,711 3,761 11,472 12,507 1,802 14,309 Consumer: Home equity lines of credit 880 516 1,396 1,429 885 2,314 Home equity loans 1,610 34 1,644 1,722 47 1,769 Other 58 3 61 3 4 7 Total consumer loans 2,548 553 3,101 3,154 936 4,090 Commercial 3,873 183 4,056 3,755 120 3,875 Construction: Residential — — — — — — Commercial — — — — — — Total construction — — — — — — Total non accrual loans $ 14,132 $ 4,497 $ 18,629 $ 19,416 $ 2,858 $ 22,274
Impaired Loans	Impaired Originated Loans – As of, or for the Six Months Ended, June 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 4,739 $ 3,705 $ 300 $ 4,005 $ 54 $ 4,291 $ 18 Commercial 7,906 5,103 2,465 7,568 808 10,004 40 Total mortgage loans on real estate 12,645 8,808 2,765 11,573 862 14,295 58 Consumer: Home equity lines of credit 1,333 1,271 — 1,271 — 1,510 8 Home equity loans 2,373 1,571 268 1,839 61 2,003 4 Other 76 3 54 57 13 48 1 Total consumer loans 3,782 2,845 322 3,167 74 3,561 13 Commercial 5,150 1,884 3,035 4,919 1,301 5,065 15 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total $ 21,577 $ 13,537 $ 6,122 $ 19,659 $ 2,237 $ 22,921 $ 86 Impaired PNCI Loans – As of, or for the Six Months Ended, June 30, 2019 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 339 $ 300 $ — $ 300 $ — $ 317 $ — Commercial 5,079 3,462 — 3,462 — 2,465 171 Total mortgage loans on real estate 5,418 3,762 — 3,762 — 2,782 171 Consumer: Home equity lines of credit 612 534 241 775 85 889 — Home equity loans 167 148 69 217 44 229 — Other 62 62 37 99 6 105 — Total consumer loans 841 744 347 1,091 135 1,223 — Commercial 113 113 70 183 70 151 Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total $ 6,372 $ 4,619 $ 417 $ 5,036 $ 205 $ 4,156 $ 171 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 $ 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 — — — — — 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 $ 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 — — — — — — — Total $ 4,990 $ 2,570 $ 656 $ 3,226 $ 246 $ 3,691 $ 207 Impaired Originated Loans – As of, or for the Six Months Ended, June 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 5,656 $ 3,947 $ 1,050 $ 4,997 $ 147 $ 4,600 $ 28 Commercial 11,280 9,763 1,076 10,839 82 10,975 9 Total mortgage loans on real estate 16,936 13,710 2,126 15,836 229 15,575 37 Consumer: Home equity lines of credit 1,244 1,108 106 1,214 29 1,315 3 Home equity loans 2,558 1,828 351 2,179 38 1,784 15 Other 3 — 3 3 3 3 — Total consumer loans 3,805 2,936 460 3,396 70 3,102 18 Commercial 4,952 809 3,942 4,751 2,127 4,686 20 Construction: Residential — — — — — 68 — Commercial — — — — — — — Total construction — — — — — 68 — Total $ 25,693 $ 17,455 $ 6,528 $ 23,983 $ 2,426 $ 23,431 $ 75 Impaired PNCI Loans – As of, or for the Six Months Ended, June 30, 2018 (in thousands) Unpaid Recorded Recorded Total recorded Related Average Interest income Mortgage loans on real estate: Residential 1-4 $ 1,417 $ 1,348 $ — $ 1,348 $ — $ 1,339 $ — Commercial 323 323 — 323 — 161 9 Total mortgage loans on real estate 1,740 1,671 — 1,671 — 1,500 9 Consumer: Home equity lines of credit 1,098 529 506 1,035 258 1,035 2 Home equity loans 293 36 242 278 154 281 — Other 244 — 244 244 51 259 — Total consumer loans 1,635 565 992 1,557 463 1,575 2 Commercial — — — — — — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total $ 3,375 $ 2,236 $ 992 $ 3,228 $ 463 $ 3,075 $ 11
Troubled Debt Restructurings	The following tables show certain information regarding TDRs that occurred during the periods indicated: TDR Information for the Three Months Ended June 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 $ $ $ — — $ — $ — Commercial — — — — — — — Total mortgage loans on real estate — — — — — — — Consumer: Home equity lines of credit 1 65 68 — — — — Home equity loans 1 28 27 27 — — — Other — — — — — — — Total consumer loans 2 93 95 27 — — — Commercial 4 1,754 1,722 2 — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 6 $ 1,847 $ 1,817 $ 29 — $ — $ — TDR Information for the Six Months Ended June 30, 2019 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 1 $ 163 $ 162 $ — — $ — $ — Commercial — — — — — — — Total mortgage loans on real estate 1 163 162 — — — — 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 6 1,768 1,737 2 1 7 — Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 10 $ 2,145 $ 2,114 $ 31 1 $ 7 $ — TDR Information for the Three Months Ended June 30, 2018 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 — $ — $ — $ — — $ — $ — Commercial 1 34 34 34 — — — Total mortgage loans on real estate 1 34 34 34 — — — Consumer: Home equity lines of credit — — — — Home equity loans — — — — Other — — — — — — — Total consumer loans — — — — — — — Commercial 2 416 421 (2 ) 4 340 (2 ) Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 3 $ 450 $ 455 $ 32 4 $ 340 $ (2 ) TDR Information for the Six Months Ended June 30, 2018 (dollars in thousands) Number Pre-mod Post-mod Financial Number that Recorded Financial impact Mortgage loans on real estate: Residential 1-4 — $ — $ — $ — — $ — $ — Commercial 2 417 417 46 1 169 — Total mortgage loans on real estate 2 417 417 46 1 169 — Consumer: Home equity lines of credit 1 133 138 — — — — Home equity loans 1 121 121 — — — — Other — — — — — — — Total consumer loans 2 254 259 — — — — Commercial 2 416 421 (2 ) 4 340 (2 ) Construction: Residential — — — — — — — Commercial — — — — — — — Total construction — — — — — — — Total 6 $ 1,087 $ 1,097 $ 44 5 $ 509 $ (2 )

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lease Cost and Other Lease Information	The following table presents the components of lease expense for the three and six months ended June 30, 2019: (in thousands) Three months ended Six months ended Operating lease cost $ 1,310 $ 2,621 Short-term lease cost 58 129 Variable lease cost (17 ) (22 ) Sublease income (32 ) (66 ) Total lease cost $ 1,319 $ 2,662
Schedule Of Supplemental Cash Flow Information Related To Operating Leases [Table Text Block]	The following table presents supplemental cash flow information related to leases for the six months ended June 30, 2019: (in thousands) Three months ended Six months ended Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 1,229 $ 2,447 ROUA obtained in exchange for operating lease liabilities $ 156 $ 32,162
Schedule Of Weighted Average Lease Term And Discount Rate Related To Operating Lease [Table Text Block]	The following table presents the weighted average operating lease term and discount rate at June 30, 2019: Weighted-average remaining lease term 9.5 years Weighted-average discount rate 3.18 %
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	At June 30, 2019, future expected operating lease payments are as follows: (in thousands) Periods ending December 31, 2019 $ 2,352 2020 4,387 2021 4,235 2022 3,896 2023 3,216 Thereafter 16,682 34,768 Discount for present value of expected cash flows (5,334 ) Lease liability at June 30, 2019 $ 29,434

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Jun. 30, 2019
Banking and Thrift [Abstract]
Summary of Balances of Deposits	A summary of the balances of deposits follows (in thousands): June 30, 2019 December 31, Noninterest-bearing demand $ 1,780,339 $ 1,760,580 Interest-bearing demand 1,263,635 1,252,366 Savings 1,856,749 1,921,324 Time certificates, $250,000 or more 130,061 132,429 Other time certificates 311,389 299,767 Total deposits $ 5,342,173 $ 5,366,466

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Summary of Bank's Commitments and Contingent Liabilities	(in thousands) June 30, December 31, Financial instruments whose amounts represent risk: Commitments to extend credit: Commercial loans $ 311,850 $ 306,191 Consumer loans 506,448 496,575 Real estate mortgage loans 173,451 140,292 Real estate construction loans 210,143 248,996 Standby letters of credit 11,338 11,346 Deposit account overdraft privilege 108,941 111,956

Stock Options and Other Equit_2

Stock Options and Other Equity-Based Incentive Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Activity	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 ratified 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 six months ended June 30, 2019 were made from the 2019 Plan. Stock option activity during the six months ended June 30, 2019 is summarized in the following table: Number Option Price Weighted Outstanding at December 31, 2018 343,000 $ 12.63 $ 16.67 Options granted — — to — — Options exercised (157,000 ) $12.63 to $19.46 15.92 Options forfeited — — to — — Outstanding at June 30, 2019 186,000 $14.54 to $23.21 $ 17.45
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 June 30, 2019: Currently Currently Not Total Number of options 185,250 750 186,000 Weighted average exercise price $ 17.43 $ 23.21 $ 17.45 Intrinsic value (in thousands) $ 3,774 $ 11 $ 3,785 Weighted average remaining contractual term (yrs.) 3.1 5.3 3.1
Restricted Stock Unit (RSU) Activity	Restricted stock unit (RSU) activity is summarized in the following table for the dates indicated: 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 519 7,414 RSUs released (26,211 ) (22,237 ) RSUs forfeited/expired — — Outstanding at June 30, 2019 76,527 53,611

Noninterest Income and Expense

Noninterest Income and Expense (Tables)	6 Months Ended
	Jun. 30, 2019
Other Income and Expenses [Abstract]
Components of Other Noninterest Income	The following table summarizes the Company’s noninterest income for the periods indicated: Three months ended June 30, Six months ended June 30, (dollars in thousands) 2019 2018 2019 2018 ATM and interchange fees $ 5,404 $ 4,510 $ 9,985 $ 8,745 Service charges on deposit accounts 4,182 3,613 8,062 7,392 Other service fees 619 630 1,390 1,344 Mortgage banking service fees 475 511 958 1,028 Change in value of mortgage servicing rights (552 ) (36 ) (1,197 ) 75 Total service charges and fees 10,128 9,228 19,198 18,584 Increase in cash value of life insurance 746 656 1,521 1,264 Asset management and commission income 739 810 1,381 1,686 Gain on sale of loans 575 666 987 1,292 Lease brokerage income 239 200 459 328 Sale of customer checks 135 138 275 239 Gain on sale of foreclosed assets 197 17 296 388 Gain (loss) on marketable equity securities 42 (23 ) 78 (70 ) Loss on disposal of fixed assets (42 ) (41 ) (80 ) (54 ) Other 819 523 1,327 807 Total other noninterest income 3,450 2,946 6,244 5,880 Total noninterest income $ 13,578 $ 12,174 $ 25,442 $ 24,464
Components of Noninterest Expense	The components of noninterest expense were as follows (in thousands): Three months ended June 30, Six months ended June 30, 2019 2018 2019 2018 Base salaries, net of deferred loan origination costs $ 17,211 $ 14,429 $ 33,968 $ 28,391 Incentive compensation 3,706 2,159 6,273 4,611 Benefits and other compensation costs 5,802 4,865 11,606 10,103 Total salaries and benefits expense 26,719 21,453 51,847 43,105 Occupancy 3,738 2,720 7,512 5,401 Data processing and software 3,354 2,679 6,703 5,193 Equipment 1,752 1,637 3,619 3,188 Intangible amortization 1,431 339 2,862 678 Advertising 1,533 1,035 2,864 1,873 ATM and POS network charges 1,270 1,437 2,593 2,663 Professional fees 1,057 774 1,896 1,546 Telecommunications 773 681 1,570 1,382 Regulatory assessments and insurance 490 417 1,001 847 Merger and acquisition expense — 601 — 1,077 Postage 315 301 625 659 Operational losses 226 252 451 546 Courier service 412 224 682 491 Other miscellaneous expense 3,782 3,320 8,140 7,383 Total other noninterest expense 20,133 16,417 40,518 32,927 Total noninterest expense $ 46,852 $ 37,870 $ 92,365 $ 76,032

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Earnings per share have been computed based on the following: Three months ended June 30, (in thousands) 2019 2018 Net income $ 23,061 $ 15,029 Average number of common shares outstanding 30,458 22,983 Effect of dilutive stock options and restricted stock 185 293 Average number of common shares outstanding used to calculate diluted earnings per share 30,643 23,276 Options excluded from diluted earnings per share because the effect of these options was antidilutive — — Six months ended June 30, (in thousands) 2019 2018 Net income $ 45,787 $ 28,939 Average number of common shares outstanding 30,441 22,970 Effect of dilutive stock options and restricted stock 209 310 Average number of common shares outstanding used to calculate diluted earnings 30,650 23,280 Options excluded from diluted earnings per share because the effect of these — —

Comprehensive Income (Tables)

Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Components of Other Comprehensive Income (Loss) and Related Tax Effects	The components of other comprehensive income (loss) and related tax effects are as follows: Three months ended June 30, Six months ended June 30, (in thousands) 2019 2018 2019 2018 Unrealized holding gains (losses) on available for sale securities before reclassifications $ 9,553 $ (5,676 ) $ 22,263 $ (20,941 ) Amounts reclassified out of accumulated other comprehensive income: Adoption ASU 2016-01 — — — 62 Adoption ASU 2018-02 — — — (425 ) Total amounts reclassified out of accumulated other comprehensive income — — — (363 ) Unrealized holding gains (losses) on available for sale securities after reclassifications 9,553 (5,676 ) 22,263 (21,304 ) Tax effect (2,824 ) 1,678 (6,582 ) 6,280 Unrealized holding gains (losses) on available for sale securities, net of tax 6,729 (3,998 ) 15,681 (15,024 ) Change in unfunded status of the supplemental retirement plans before reclassifications (89 ) — (177 ) 668 Amounts reclassified out of accumulated other comprehensive income: Amortization of prior service cost (13 ) (13 ) (27 ) (27 ) Amortization of actuarial losses 102 127 204 254 Adoption ASU 2018-02 — — — (668 ) Total amounts reclassified out of accumulated other comprehensive income 89 114 177 (441 ) Change in unfunded status of the supplemental retirement plans after reclassifications — 114 — 227 Tax effect — (34 ) — (67 ) Change in unfunded status of the supplemental retirement plans, net of tax — 80 — 160 Total other comprehensive income (loss) $ 6,729 $ (3,918 ) $ 15,681 $ (14,864 )
Components of Accumulated Other Comprehensive Loss	The components of accumulated other comprehensive loss, included in shareholders’ equity, are as follows: June 30, December 31, (in thousands) 2019 2018 Net unrealized loss on available for sale securities $ 1,289 $ (20,974 ) Tax effect (381 ) 6,201 Unrealized holding loss on available for sale securities, net of tax 908 (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 loss $ (2,198 ) $ (17,879 )

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 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 June 30, 2019 Total Level 1 Level 2 Level 3 Marketable equity securities $ 2,952 $ 2,952 $ — $ — Debt securities available for sale: Obligations of U.S. government corporations and agencies 630,911 — 630,911 — Obligations of states and political subdivisions 125,980 — 125,980 — Corporate bonds 4,521 — 4,521 — Asset backed securities 372,582 — 372,582 — Loans held for sale 5,875 — 5,875 — Mortgage servicing rights 6,229 — — 6,229 Total assets measured at fair value $ 1,149,050 $ 2,952 $ 1,139,869 $ 6,229 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): Transfers Change Beginning into (out of) Included Ending Three months ended June 30, Balance Level 3 in Earnings Issuances Balance 2019: Mortgage servicing rights $ 6,572 — $ (552 ) $ 209 $ 6,229 2018: Mortgage servicing rights $ 6,953 — $ (36 ) $ 104 $ 7,021 Six months ended June 30, Beginning Balance Transfers into (out of) Level 3 Change Included in Earnings Issuances Ending Balance 2019: Mortgage servicing rights $ 7,098 — $ (1,197 ) $ 328 $ 6,229 2018: Mortgage servicing rights $ 6,687 — $ 75 $ 259 $ 7,021
Quantitative Information about Recurring Level 3 Fair Value Measurements	The following table presents quantitative information about recurring Level 3 fair value measurements at June 30, 2019 and December 31, 2018: Fair Value Valuation Unobservable Range, Weighted As of June 30, 2019: (in thousands) Technique Inputs Average Mortgage Servicing Rights $ 6,229 Discounted cash flow Constant prepayment rate 6.9% - % Discount rate 10% - 14%;12 % As of December 31, 2018: Mortgage Servicing Rights $ 7,098 Discounted cash flow Constant prepayment rate 5.0% - 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): Total Gains June 30, 2019 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 1,164 — — $ 1,164 $ (808 ) Foreclosed assets 454 — — 454 (63 ) Total assets measured at fair value $ 1,618 — — $ 1,618 $ (871 ) Total Gains December 31, 2018 Total Level 1 Level 2 Level 3 (Losses) 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 ) Total Gains June 30, 2018 Total Level 1 Level 2 Level 3 (Losses) Fair value: Impaired Originated & PNCI loans $ 1,647 — — $ 1,647 $ (505 ) Foreclosed assets 584 — — 584 (90 ) Total assets measured at fair value $ 2,231 — — $ 2,231 $ (595 )
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 June 30, 2019: June 30, 2019 Fair Value Valuation Technique Unobservable Inputs Range, Impaired Originated & PNCI loans $ — Sales comparison approach Income approach Adjustment for differences between comparable sales Capitalization rate Not meaningful Foreclosed assets (Residential real estate) $ — Sales comparison approach Adjustment for differences between comparable sales 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 Technique Unobservable Inputs Range, Impaired Originated & PNCI loans $ 281 Sales comparison approach Income approach Adjustment for differences between comparable sales Capitalization rate (16.3%) - Foreclosed assets (Residential real estate) $ 693 Sales comparison approach Adjustment for differences between comparable sales (21.83%) - 7.25%; Foreclosed assets (Commercial real estate) $ 618 Sales comparison approach Adjustment for differences between comparable sales (65%) - 20%; (45%)
Estimated Fair Values of Financial Instruments that are Reported at Amortized Cost in Consolidated Balance Sheets	June 30, 2019 December 31, 2018 (in thouands) Carrying Fair Value Carrying Fair Value Financial assets: Level 1 inputs: Cash and due from banks $ 106,939 $ 106,939 $ 119,781 $ 119,781 Cash at Federal Reserve and other banks 68,643 68,643 107,752 107,752 Level 2 inputs: Securities held to maturity 412,524 415,276 444,936 437,370 Restricted equity securities 17,250 N/A 17,250 N/A Loans held for sale 5,875 5,875 3,687 4,616 Level 3 inputs: Loans, net 4,070,819 4,057,792 3,989,432 4,006,986 Financial liabilities: Level 2 inputs: Deposits 5,342,173 5,341,105 5,366,466 5,362,173 Other borrowings 13,292 13,292 15,839 15,839 Level 3 inputs: Junior subordinated debt 57,132 56,209 57,042 62,610 (in thouands) Contract Fair Value Contract Fair Value Off-balance Level 3 inputs: Commitments $ 1,201,892 $ 12,019 $ 1,192,054 $ 11,921 Standby letters of credit 11,338 113 11,346 113 Overdraft privilege commitments 108,941 1,089 111,956 1,120

Regulatory Matters (Tables)

Regulatory Matters (Tables)	6 Months Ended
	Jun. 30, 2019
Banking and Thrift [Abstract]
Actual and Required Capital Ratios of Bank	The following tables present actual and required capital ratios as of June 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 June 30, 2019 and December 31, 2018 based on the then phased-in phased-in. Actual Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of June 30, 2019: Total Capital (to Risk Weighted Assets): Consolidated $ 718,901 14.93 % $ 505,569 10.50 % N/A N/A Tri Counties Bank $ 714,018 14.83 % $ 505,385 10.50 % $ 481,320 10.00 % Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 683,043 14.19 % $ 409,270 8.50 % N/A N/A Tri Counties Bank $ 678,160 14.09 % $ 409,122 8.50 % $ 385,056 8.00 % Common equity Tier 1 Capital (to Risk Weighted Assets): Consolidated $ 627,627 13.03 % $ 337,046 7.00 % N/A N/A Tri Counties Bank $ 678,160 14.09 % $ 336,924 7.00 % $ 312,858 6.50 % Tier 1 Capital (to Average Assets): Consolidated $ 683,043 11.08 % $ 246,599 4.00 % N/A N/A Tri Counties Bank $ 678,160 11.00 % $ 246,594 4.00 % $ 308,242 5.00 % Actual Minimum Capital Phase-in Minimum Capital Required to be Amount Ratio Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) As of December 31, 2018: 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)	6 Months Ended
	Jun. 30, 2019USD ($)SegmentOfficeTrustBusiness
Significant Of Accounting Policies [Line Items]
Number of subsidiary business trusts | Trust	5
Number of loan production offices | Office	2
Company's investments in the trusts | $	$ 1,716,000
Number of business segment | Segment	1
Loans contractual past due	90 days
California [Member]
Significant Of Accounting Policies [Line Items]
Number of counties | Business	29

Business Combinations - Additio

Business Combinations - Additional Information (Detail)	Jul. 06, 2018USD ($)Branchesshares	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Business Acquisition [Line Items]
Goodwill recognized			$ 220,972,000		$ 220,972,000
PNCI [Member]
Business Acquisition [Line Items]
Receivables gross contractual amount			866,189,000
Receivables fair value			833,381,000
PCI [Member]
Business Acquisition [Line Items]
Receivables gross contractual amount			1,683,000
Receivables fair value			1,302,000
FNBB [Member]
Business Acquisition [Line Items]
Total consideration value	$ 291,132,000
Issue of common stock shares | shares	7,405,277
Amount paid in exchange for the outstanding options	$ 6,700,000
Number of branches added | Branches	12
Goodwill recognized	$ 156,661,000
Recognized intangible related to acquisition	27,605,000
FNBB [Member] | Core Deposit Intangibles [Member]
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	Jun. 30, 2019	Dec. 31, 2018
Liabilities assumed:
Goodwill recognized		$ 220,972	$ 220,972
FNBB [Member]
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	15,133
Total liabilities assumed	1,172,068
Total net assets acquired	134,471
Goodwill recognized	156,661
FNBB [Member] | Federal Home Loan Bank of San Francisco [Member]
Liabilities assumed:
Short-term borrowings	$ 165,000

Business Combinations - Summary

Business Combinations - Summary of Estimated Fair Value Adjustments Resulting in Goodwill (Detail) - USD ($) $ in Thousands	Jul. 06, 2018	Jun. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 220,972	$ 220,972
FNBB [Member]
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)
Fair Value Adjustments, Premises and equipment	21,590
Core deposit intangible	27,327
Deferred income taxes	(6,394)
Other	1,389
Goodwill	156,661
FNBB [Member] | Loans [Member]
Business Acquisition [Line Items]
Fair Value Adjustments	$ (22,390)

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Values of Investments Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Amortized Cost	$ 1,132,705	$ 1,136,010
Debt Securities Available for Sale, Gross Unrealized Gains	8,021	1,235
Debt Securities Available for Sale, Gross Unrealized Losses	(6,732)	(22,209)
Debt Securities Available for Sale, Estimated Fair Value	1,133,994	1,115,036
Debt Securities Held to Maturity, Amortized Cost	412,524	444,936
Debt Securities Held to Maturity, Gross Unrealized Gains	3,951	409
Debt Securities Held to Maturity, Gross Unrealized Losses	(1,199)	(7,975)
Debt Securities Held to Maturity, Estimated Fair Value	415,276	437,370
Obligations of U.S. Government Agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Amortized Cost	627,996	647,288
Debt Securities Available for Sale, Gross Unrealized Gains	5,193	771
Debt Securities Available for Sale, Gross Unrealized Losses	(2,278)	(18,078)
Debt Securities Available for Sale, Estimated Fair Value	630,911	629,981
Debt Securities Held to Maturity, Amortized Cost	398,714	430,343
Debt Securities Held to Maturity, Gross Unrealized Gains	3,661	327
Debt Securities Held to Maturity, Gross Unrealized Losses	(1,199)	(7,745)
Debt Securities Held to Maturity, Estimated Fair Value	401,176	422,925
Obligations of States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Amortized Cost	123,626	128,890
Debt Securities Available for Sale, Gross Unrealized Gains	2,462	294
Debt Securities Available for Sale, Gross Unrealized Losses	(108)	(3,112)
Debt Securities Available for Sale, Estimated Fair Value	125,980	126,072
Debt Securities Held to Maturity, Amortized Cost	13,810	14,593
Debt Securities Held to Maturity, Gross Unrealized Gains	290	82
Debt Securities Held to Maturity, Gross Unrealized Losses		(230)
Debt Securities Held to Maturity, Estimated Fair Value	14,100	14,445
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Amortized Cost	4,407	4,381
Debt Securities Available for Sale, Gross Unrealized Gains	114	97
Debt Securities Available for Sale, Estimated Fair Value	4,521	4,478
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Amortized Cost	376,676	355,451
Debt Securities Available for Sale, Gross Unrealized Gains	252	73
Debt Securities Available for Sale, Gross Unrealized Losses	(4,346)	(1,019)
Debt Securities Available for Sale, Estimated Fair Value	$ 372,582	$ 354,505

Investment Securities - Additio

Investment Securities - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019USD ($)Investmentsecurities	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Investment Securities [Line Items]
Investment securities sold	$ 0	$ 0
Securities Pledged As Collateral	569,296,000		$ 597,591,000
Residential real estate mortgage-backed securities	$ 1,026,710,000
Life of mortgage-backed securities	5 years 1 month 6 days
Obligations of U.S. Government Agencies [Member]
Investment Securities [Line Items]
Percentage of aggregate depreciation in unrealized losses	(1.00%)
Obligations of States and Political Subdivisions [Member]
Investment Securities [Line Items]
Available for sale securities in unrealized loss position | Investmentsecurities	13
Percentage of aggregate depreciation in unrealized losses	(2.00%)
Asset-backed Securities [Member]
Investment Securities [Line Items]
Available for sale securities in unrealized loss position | Investmentsecurities	28
Percentage of aggregate depreciation in unrealized losses	(1.30%)

Investment Securities - Amort_2

Investment Securities - Amortized Cost and Estimated Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Due in one year, Amortized Cost	$ 2,415
Due after one year through five years, Amortized Cost	14,287
Due after five years through ten years, Amortized Cost	44,325
Due after ten years, Amortized Cost	1,071,678
Totals, Amortized Cost	1,132,705
Due in one year, Estimated Fair Value	2,421
Due after one year through five years, Estimated Fair Value	14,636
Due after five years through ten years, Estimated Fair Value	45,235
Due after ten years, Estimated Fair Value	1,071,702
Totals, Estimated Fair Value	1,133,994
Due after one year through five years, Amortized Cost, Held to Maturity	1,254
Due after five years through ten years, Amortized Cost, Held to Maturity	21,922
Due after ten years, Amortized Cost, Held to Maturity	389,348
Totals, Amortized Cost, Held to Maturity	412,524	$ 444,936
Due after one year through five years, Estimated Fair Value, Held to Maturity	1,269
Due after five years through ten years, Estimated Fair Value, Held to Maturity	22,166
Due after ten years, Estimated Fair Value, Held to Maturity	391,841
Estimated Fair Value, Held to Maturity	$ 415,276	$ 437,370

Investment Securities - Gross U

Investment Securities - Gross Unrealized Losses on Investment Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Less than 12 months, Fair Value	$ 345,220	$ 336,433
Debt Securities Available for Sale, Less than 12 months, Unrealized Loss	(4,454)	(6,148)
Debt Securities Available for Sale, 12 months or more, Fair Value	247,286	415,349
Debt Securities Available for Sale, 12 months or more, Unrealized Loss	(2,278)	(16,061)
Debt Securities Available for Sale, Fair Value	592,506	751,782
Debt Securities Available for Sale, Unrealized Loss	(6,732)	(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	110,702	162,690
Debt Securities Held to Maturity, 12 months or more, Unrealized Loss	(1,199)	(5,242)
Debt Securities Held to Maturity, Fair Value	110,702	392,286
Debt Securities Held to Maturity, Unrealized Loss	(1,199)	(7,975)
Obligations of U.S. Government Agencies [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Less than 12 months, Fair Value		171,309
Debt Securities Available for Sale, Less than 12 months, Unrealized Loss		(3,588)
Debt Securities Available for Sale, 12 months or more, Fair Value	247,286	394,630
Debt Securities Available for Sale, 12 months or more, Unrealized Loss	(2,278)	(14,490)
Debt Securities Available for Sale, Fair Value	247,286	565,939
Debt Securities Available for Sale, Unrealized Loss	(2,278)	(18,078)
Debt Securities Held to Maturity, Less than 12 months, Fair Value		223,810
Debt Securities Held to Maturity, Less than 12 months, Unrealized Loss		(2,619)
Debt Securities Held to Maturity, 12 months or more, Fair Value	110,702	158,648
Debt Securities Held to Maturity, 12 months or more, Unrealized Loss	(1,199)	(5,126)
Debt Securities Held to Maturity, Fair Value	110,702	382,458
Debt Securities Held to Maturity, Unrealized Loss	(1,199)	(7,745)
Obligations of States and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Less than 12 months, Fair Value	5,208	63,738
Debt Securities Available for Sale, Less than 12 months, Unrealized Loss	(108)	(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	5,208	84,457
Debt Securities Available for Sale, Unrealized Loss	(108)	(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 [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities Available for Sale, Less than 12 months, Fair Value	340,012	101,386
Debt Securities Available for Sale, Less than 12 months, Unrealized Loss	(4,346)	(1,019)
Debt Securities Available for Sale, Fair Value	340,012	101,386
Debt Securities Available for Sale, Unrealized Loss	$ (4,346)	$ (1,019)

Loans - Summary of Loan Balance

Loans - Summary of Loan Balances (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	$ 4,152,540		$ 4,075,244
Unamortized net deferred loan fees	(9,050)		(9,868)
Discounts to principal balance of loans owed, net of charge-offs	(39,803)		(43,362)
Total loans, net of unamortized deferred loan fees and discounts	4,103,687		4,022,014	$ 3,146,313
Allowance for loan losses	(32,868)	$ (32,064)	(32,582)	(29,524)	$ (29,973)	$ (30,323)
Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,178,730		3,143,100	2,401,040
Allowance for loan losses	(14,675)	(14,830)	(15,620)	(13,598)	(13,665)	(13,758)
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	434,388		418,982	350,925
Allowance for loan losses	(8,552)	(8,341)	(8,375)	(7,137)	(7,718)	(8,227)
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	276,045		276,548	237,619
Allowance for loan losses	(6,745)	(6,078)	(6,090)	(6,378)	(6,392)	(6,512)
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	214,524		183,384	156,729
Allowance for loan losses	(2,896)	(2,815)	(2,497)	(2,411)	(2,198)	(1,826)
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	506,049		515,262	384,692
Allowance for loan losses	(2,576)	(2,500)	(2,676)	(1,991)	(2,170)	(2,317)
Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	32,345		36,684	40,986
Allowance for loan losses	(1,242)	(1,286)	(1,540)	(1,532)	(1,736)	(1,841)
Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	71,143		55,721	23,503
Allowance for loan losses	(1,451)	(1,040)	(793)	(557)	(570)	(586)
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,672,681		2,627,838	2,016,348
Allowance for loan losses	(12,099)	(12,330)	(12,944)	(11,607)	(11,495)	(11,441)
Commercial [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	57,009		62,088	83,151
Allowance for loan losses	(358)	(407)	(663)	(977)	(847)	(642)
Home Equity Lines of Credit [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	330,900		326,577	286,436
Allowance for loan losses	(5,859)	(6,015)	(6,042)	(5,048)	(5,412)	(5,800)
Residential [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	157,515		121,296	73,578
Allowance for loan losses	(2,538)	$ (2,408)	(1,834)	$ (1,434)	$ (1,351)	$ (1,184)
Originated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	3,193,938		2,991,324
Unamortized net deferred loan fees	(9,050)		(9,868)
Total loans, net of unamortized deferred loan fees and discounts	3,184,888		2,981,456
Allowance for loan losses	(32,273)		(31,793)
Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,354,722		2,254,777
Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	376,922		351,133
Originated [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	248,523		228,635
Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	204,721		146,911
Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	348,737		343,796
Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	29,041		32,660
Originated [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	53,340		34,020
Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,005,985		1,910,981
Originated [Member] | Commercial [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	56,289		56,208
Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	294,541		284,453
Originated [Member] | Residential [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	148,432		90,703
PNCI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	940,627		1,062,655
Discounts to principal balance of loans owed, net of charge-offs	(33,323)		(36,320)
Total loans, net of unamortized deferred loan fees and discounts	907,304		1,026,335
Allowance for loan losses	(585)		(667)
PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	816,609		878,193
PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	55,908		66,201
PNCI [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	24,984		45,468
PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,803		36,473
PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	155,872		169,792
PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,875		3,585
PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	17,802		21,659
PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	660,737		708,401
PNCI [Member] | Commercial [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	720		5,880
PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	35,231		40,957
PNCI [Member] | Residential [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,083		30,593
PCI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total principal balance of loans owed, net of charge-offs	17,975		21,265
Discounts to principal balance of loans owed, net of charge-offs	(6,480)		(7,042)
Total loans, net of unamortized deferred loan fees and discounts	11,495		14,223
Allowance for loan losses	(10)		(122)
PCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	7,399		10,130
PCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,558		1,648
PCI [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,538		2,445
PCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,440		1,674
PCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	429		439
PCI [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1		42
PCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,959		8,456
PCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 1,128		$ 1,167

Loans - Change in Accretable Yi

Loans - Change in Accretable Yield for PCI (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Change in accretable yield:
Balance at beginning of period	$ 5,747	$ 6,022	$ 6,059	$ 6,137
Accretion to interest income	(109)	(261)	(410)	(516)
Reclassification (to) from nonaccretable difference	(320)	110	(331)	250
Balance at end of period	$ 5,318	$ 5,871	$ 5,318	$ 5,871

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	$ 32,064	$ 29,973	$ 32,582	$ 30,323	$ 30,323
Charge-offs	(293)	(318)	(1,019)	(798)	(2,364)
Recoveries	560	507	2,368	873	2,040
Provision (benefit)	537	(638)	(1,063)	(874)	2,583
Ending Balance	32,868	29,524	32,868	29,524	32,582
Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	14,830	13,665	15,620	13,758	13,758
Charge-offs	(2)	(66)	(2)	(67)	(92)
Recoveries	13	21	1,396	36	68
Provision (benefit)	(166)	(22)	(2,339)	(129)	1,886
Ending Balance	14,675	13,598	14,675	13,598	15,620
Mortgage Loans on Real Estate [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	12,330	11,495	12,944	11,441	11,441
Charge-offs		(15)		(15)	(15)
Recoveries	10	21	1,391	36	68
Provision (benefit)	(241)	106	(2,236)	145	1,450
Ending Balance	12,099	11,607	12,099	11,607	12,944
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	8,341	7,718	8,375	8,227	8,227
Charge-offs	(153)	(198)	(360)	(472)	(1,084)
Recoveries	462	406	719	707	1,431
Provision (benefit)	(98)	(789)	(182)	(1,325)	(199)
Ending Balance	8,552	7,137	8,552	7,137	8,375
Consumer [Member] | Home Equity Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	6,015	5,412	6,042	5,800	5,800
Charge-offs		(24)		(104)	(277)
Recoveries	183	317	278	526	846
Provision (benefit)	(339)	(657)	(461)	(1,174)	(327)
Ending Balance	5,859	5,048	5,859	5,048	6,042
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	6,078	6,392	6,090	6,512	6,512
Charge-offs	(138)	(54)	(657)	(259)	(1,188)
Recoveries	85	80	253	130	541
Provision (benefit)	720	(40)	1,059	(5)	225
Ending Balance	6,745	6,378	6,745	6,378	6,090
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	2,815	2,198	2,497	1,826	1,826
Provision (benefit)	81	213	399	585	671
Ending Balance	2,896	2,411	2,896	2,411	2,497
Construction [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	407	847	663	642	642
Provision (benefit)	(49)	130	(305)	335	21
Ending Balance	358	977	358	977	663
Construction [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	2,408	1,351	1,834	1,184	1,184
Provision (benefit)	130	83	704	250	650
Ending Balance	2,538	1,434	2,538	1,434	1,834
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	2,500	2,170	2,676	2,317	2,317
Charge-offs	(2)	(51)	(2)	(52)	(77)
Recoveries	3		5
Provision (benefit)	75	(128)	(103)	(274)	436
Ending Balance	2,576	1,991	2,576	1,991	2,676
Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	1,286	1,736	1,540	1,841	1,841
Charge-offs					(24)
Recoveries	171	23	258	37	297
Provision (benefit)	(215)	(227)	(556)	(346)	(574)
Ending Balance	1,242	1,532	1,242	1,532	1,540
Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning Balance	1,040	570	793	586	586
Charge-offs	(153)	(174)	(360)	(368)	(783)
Recoveries	108	66	183	144	288
Provision (benefit)	456	95	835	195	702
Ending Balance	$ 1,451	$ 557	$ 1,451	$ 557	$ 793

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	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	$ 30,416		$ 30,266	$ 26,496
Allowance for Loan Losses, Individually evaluated for impairment	2,442		2,194	2,889
Total allowance for loan losses	32,868	$ 32,064	32,582	29,524	$ 29,973	$ 30,323
Loans, Net of Unearned fees , Loans pooled for evaluation	4,067,497		3,979,744	3,105,241
Loans, Net of Unearned fees , Individually evaluated for impairment	24,695		28,047	27,211
Total loans, net of unamortized deferred loan fees and discounts	4,103,687		4,022,014	3,146,313
Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	14,537		15,357	13,260
Allowance for Loan Losses, Individually evaluated for impairment	138		147	229
Total allowance for loan losses	14,675	14,830	15,620	13,598	13,665	13,758
Loans, Net of Unearned fees , Loans pooled for evaluation	3,155,996		3,116,086	2,374,219
Loans, Net of Unearned fees , Individually evaluated for impairment	15,335		16,884	17,506
Total loans, net of unamortized deferred loan fees and discounts	3,178,730		3,143,100	2,401,040
Mortgage Loans on Real Estate [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	12,015		12,737	11,466
Allowance for Loan Losses, Individually evaluated for impairment	84		91	82
Total allowance for loan losses	12,099	12,330	12,944	11,607	11,495	11,441
Loans, Net of Unearned fees , Loans pooled for evaluation	2,655,692		2,606,819	1,997,591
Loans, Net of Unearned fees , Individually evaluated for impairment	11,030		12,563	11,162
Total loans, net of unamortized deferred loan fees and discounts	2,672,681		2,627,838	2,016,348
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	8,378		8,103	6,597
Allowance for Loan Losses, Individually evaluated for impairment	164		266	533
Total allowance for loan losses	8,552	8,341	8,375	7,137	7,718	8,227
Loans, Net of Unearned fees , Loans pooled for evaluation	428,572		411,389	343,898
Loans, Net of Unearned fees , Individually evaluated for impairment	4,258		5,945	4,954
Total loans, net of unamortized deferred loan fees and discounts	434,388		418,982	350,925
Consumer [Member] | Home Equity Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	5,764		5,838	4,754
Allowance for Loan Losses, Individually evaluated for impairment	85		198	287
Total allowance for loan losses	5,859	6,015	6,042	5,048	5,412	5,800
Loans, Net of Unearned fees , Loans pooled for evaluation	327,726		322,764	282,611
Loans, Net of Unearned fees , Individually evaluated for impairment	2,046		2,646	2,250
Total loans, net of unamortized deferred loan fees and discounts	330,900		326,577	286,436
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	4,605		4,309	4,228
Allowance for Loan Losses, Individually evaluated for impairment	2,140		1,781	2,127
Total allowance for loan losses	6,745	6,078	6,090	6,378	6,392	6,512
Loans, Net of Unearned fees , Loans pooled for evaluation	268,405		268,885	230,395
Loans, Net of Unearned fees , Individually evaluated for impairment	5,102		5,218	4,751
Total loans, net of unamortized deferred loan fees and discounts	276,045		276,548	237,619
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	2,896		2,497	2,411
Total allowance for loan losses	2,896	2,815	2,497	2,411	2,198	1,826
Loans, Net of Unearned fees , Loans pooled for evaluation	214,524		183,384	156,729
Loans, Net of Unearned fees , Individually evaluated for impairment				0
Total loans, net of unamortized deferred loan fees and discounts	214,524		183,384	156,729
Construction [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	358		663	977
Total allowance for loan losses	358	407	663	977	847	642
Loans, Net of Unearned fees , Loans pooled for evaluation	57,009		62,088	83,151
Total loans, net of unamortized deferred loan fees and discounts	57,009		62,088	83,151
Construction [Member] | Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	2,538		1,834	1,434
Total allowance for loan losses	2,538	2,408	1,834	1,434	1,351	1,184
Loans, Net of Unearned fees , Loans pooled for evaluation	157,515		121,296	73,578
Total loans, net of unamortized deferred loan fees and discounts	157,515		121,296	73,578
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	2,522		2,620	1,794
Allowance for Loan Losses, Individually evaluated for impairment	54		56	147
Total allowance for loan losses	2,576	2,500	2,676	1,991	2,170	2,317
Loans, Net of Unearned fees , Loans pooled for evaluation	500,304		509,267	376,628
Loans, Net of Unearned fees , Individually evaluated for impairment	4,305		4,321	6,344
Total loans, net of unamortized deferred loan fees and discounts	506,049		515,262	384,692
Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	1,181		1,486	1,340
Allowance for Loan Losses, Individually evaluated for impairment	61		54	192
Total allowance for loan losses	1,242	1,286	1,540	1,532	1,736	1,841
Loans, Net of Unearned fees , Loans pooled for evaluation	29,860		33,142	38,074
Loans, Net of Unearned fees , Individually evaluated for impairment	2,056		3,103	2,457
Total loans, net of unamortized deferred loan fees and discounts	32,345		36,684	40,986
Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans pooled for evaluation	1,433		779	503
Allowance for Loan Losses, Individually evaluated for impairment	18		14	54
Total allowance for loan losses	1,451	$ 1,040	793	557	$ 570	$ 586
Loans, Net of Unearned fees , Loans pooled for evaluation	70,986		55,483	23,213
Loans, Net of Unearned fees , Individually evaluated for impairment	156		196	247
Total loans, net of unamortized deferred loan fees and discounts	71,143		55,721	23,503
Financial Asset Acquired with Credit Deterioration [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans acquired with deteriorated credit quality	10		122	139
Total loans, net of unamortized deferred loan fees and discounts	11,495		14,223	13,861
Financial Asset Acquired with Credit Deterioration [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans acquired with deteriorated credit quality			116	109
Total loans, net of unamortized deferred loan fees and discounts	7,399		10,130	9,315
Financial Asset Acquired with Credit Deterioration [Member] | Mortgage Loans on Real Estate [Member] | Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans acquired with deteriorated credit quality			116	59
Total loans, net of unamortized deferred loan fees and discounts	5,959		8,456	7,595
Financial Asset Acquired with Credit Deterioration [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans acquired with deteriorated credit quality	10		6	7
Total loans, net of unamortized deferred loan fees and discounts	1,558		1,648	2,073
Financial Asset Acquired with Credit Deterioration [Member] | Consumer [Member] | Home Equity Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans acquired with deteriorated credit quality	10		6	7
Total loans, net of unamortized deferred loan fees and discounts	1,128		1,167	1,575
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans acquired with deteriorated credit quality				23
Total loans, net of unamortized deferred loan fees and discounts	2,538		2,445	2,473
Financial Asset Acquired with Credit Deterioration [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Allowance for Loan Losses, Loans acquired with deteriorated credit quality				50
Total loans, net of unamortized deferred loan fees and discounts	1,440		1,674	1,720
Financial Asset Acquired with Credit Deterioration [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	429		439	455
Financial Asset Acquired with Credit Deterioration [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 1		$ 42	$ 43

Allowance for Loan Losses - Sch

Allowance for Loan Losses - Schedule Credit Quality Indicators (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 4,103,687	$ 4,022,014	$ 3,146,313
Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,178,730	3,143,100	2,401,040
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	434,388	418,982	350,925
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	276,045	276,548	237,619
Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	214,524	183,384	156,729
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	506,049	515,262	384,692
Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	32,345	36,684	40,986
Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	71,143	55,721	23,503
Originated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,184,888	2,981,456
Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,354,722	2,254,777
Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	376,922	351,133
Originated [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	248,523	228,635
Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	204,721	146,911
Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	348,737	343,796
Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	29,041	32,660
Originated [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	53,340	34,020
PNCI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	907,304	1,026,335
PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	816,609	878,193
PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	55,908	66,201
PNCI [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	24,984	45,468
PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,803	36,473
PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	155,872	169,792
PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,875	3,585
PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	17,802	21,659
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,672,681	2,627,838	2,016,348
Commercial [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	57,009	62,088	83,151
Commercial [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,005,985	1,910,981
Commercial [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	56,289	56,208
Commercial [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	660,737	708,401
Commercial [Member] | PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	720	5,880
Home Equity Lines of Credit [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	330,900	326,577	286,436
Home Equity Lines of Credit [Member] | Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	294,541	284,453
Home Equity Lines of Credit [Member] | PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	35,231	40,957
Residential [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	157,515	121,296	$ 73,578
Residential [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	148,432	90,703
Residential [Member] | PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,083	30,593
Pass [Member] | Originated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,118,133	2,904,603
Pass [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,307,139	2,198,816
Pass [Member] | Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	369,833	342,386
Pass [Member] | Originated [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	237,025	217,126
Pass [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	204,136	146,275
Pass [Member] | Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	342,847	337,189
Pass [Member] | Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	26,265	29,289
Pass [Member] | Originated [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	53,044	33,606
Pass [Member] | PNCI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	892,884	1,014,950
Pass [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	805,059	869,776
Pass [Member] | PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	53,617	63,674
Pass [Member] | PNCI [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	24,650	45,027
Pass [Member] | PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,558	36,473
Pass [Member] | PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	154,238	167,908
Pass [Member] | PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,727	3,413
Pass [Member] | PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	17,545	21,481
Pass [Member] | Commercial [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,964,292	1,861,627
Pass [Member] | Commercial [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	55,958	55,863
Pass [Member] | Commercial [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	650,821	701,868
Pass [Member] | Commercial [Member] | PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	475	5,880
Pass [Member] | Home Equity Lines of Credit [Member] | Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	290,524	279,491
Pass [Member] | Home Equity Lines of Credit [Member] | PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	33,345	38,780
Pass [Member] | Residential [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	148,178	90,412
Pass [Member] | Residential [Member] | PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,083	30,593
Special Mention [Member] | Originated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	41,561	45,415
Special Mention [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	33,610	35,207
Special Mention [Member] | Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,426	3,704
Special Mention [Member] | Originated [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,194	6,127
Special Mention [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	331	377
Special Mention [Member] | Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,048	1,724
Special Mention [Member] | Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	564	1,054
Special Mention [Member] | Originated [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	189	341
Special Mention [Member] | PNCI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,124	5,863
Special Mention [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,005	4,171
Special Mention [Member] | PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,118	1,371
Special Mention [Member] | PNCI [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1	321
Special Mention [Member] | PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	864	1,086
Special Mention [Member] | PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	69	74
Special Mention [Member] | PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	254	173
Special Mention [Member] | Commercial [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	32,562	33,483
Special Mention [Member] | Commercial [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	331	345
Special Mention [Member] | Commercial [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3,141	3,085
Special Mention [Member] | Home Equity Lines of Credit [Member] | Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,673	2,309
Special Mention [Member] | Home Equity Lines of Credit [Member] | PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	795	1,124
Special Mention [Member] | Residential [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts		32
Substandard [Member] | Originated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	24,883	31,438
Substandard [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	13,973	20,754
Substandard [Member] | Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,663	5,043
Substandard [Member] | Originated [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	5,993	5,382
Substandard [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	254	259
Substandard [Member] | Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	4,842	4,883
Substandard [Member] | Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,212	2,317
Substandard [Member] | Originated [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	107	73
Substandard [Member] | PNCI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,296	5,522
Substandard [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	7,545	4,246
Substandard [Member] | PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,173	1,156
Substandard [Member] | PNCI [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	333	120
Substandard [Member] | PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	245
Substandard [Member] | PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	770	798
Substandard [Member] | PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	79	98
Substandard [Member] | PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	3	5
Substandard [Member] | Commercial [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	9,131	15,871
Substandard [Member] | Commercial [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	6,775	3,448
Substandard [Member] | Commercial [Member] | PNCI [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	245
Substandard [Member] | Home Equity Lines of Credit [Member] | Originated [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	2,344	2,653
Substandard [Member] | Home Equity Lines of Credit [Member] | PNCI [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	1,091	1,053
Substandard [Member] | Residential [Member] | Originated [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	254	$ 259
Doubtful [Member] | Originated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	311
Doubtful [Member] | Originated [Member] | Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Total loans, net of unamortized deferred loan fees and discounts	$ 311

Allowance for Loan Losses - Ana

Allowance for Loan Losses - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 4,103,687	$ 4,022,014	$ 3,146,313
Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	3,178,730	3,143,100	2,401,040
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	434,388	418,982	350,925
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	276,045	276,548	237,619
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	214,524	183,384	156,729
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	506,049	515,262	384,692
Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	32,345	36,684	40,986
Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	71,143	55,721	23,503
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	2,672,681	2,627,838	2,016,348
Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	57,009	62,088	83,151
Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	330,900	326,577	286,436
Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	157,515	121,296	$ 73,578
Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	10,666	10,460
Current	3,174,222	2,970,996
Total	3,184,888	2,981,456
> 90 Days and Still Accruing	22
Originated [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	4,622	4,212
Current	2,350,100	2,250,565
Total	2,354,722	2,254,777
Originated [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,846	3,160
Current	374,076	347,973
Total	376,922	351,133
> 90 Days and Still Accruing	12
Originated [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,047	2,879
Current	245,476	225,756
Total	248,523	228,635
> 90 Days and Still Accruing	10
Originated [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	151	209
Current	204,570	146,702
Total	204,721	146,911
Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,525	2,285
Current	346,212	341,511
Total	348,737	343,796
Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	871	1,281
Current	28,170	31,379
Total	29,041	32,660
Originated [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	64	315
Current	53,276	33,705
Total	53,340	34,020
> 90 Days and Still Accruing	12
Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,097	1,927
Current	2,003,888	1,909,054
Total	2,005,985	1,910,981
Originated [Member] | Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	56,289	56,208
Total	56,289	56,208
Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,911	1,564
Current	292,630	282,889
Total	294,541	284,453
Originated [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	151	209
Current	148,281	90,494
Total	148,432	90,703
PNCI [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,534	6,908
Current	903,770	1,019,427
Total	907,304	1,026,335
PNCI [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,827	5,162
Current	814,782	873,031
Total	816,609	878,193
PNCI [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	379	810
Current	55,529	65,391
Total	55,908	66,201
PNCI [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,083	936
Current	23,901	44,532
Total	24,984	45,468
PNCI [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	245
Current	9,558	36,473
Total	9,803	36,473
PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	682	1,298
Current	155,190	168,494
Total	155,872	169,792
PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	62	74
Current	2,813	3,511
Total	2,875	3,585
PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	119	160
Current	17,683	21,499
Total	17,802	21,659
PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,145	3,864
Current	659,592	704,537
Total	660,737	708,401
PNCI [Member] | Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	245
Current	475	5,880
Total	720	5,880
PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	198	576
Current	35,033	40,381
Total	35,231	40,957
PNCI [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,083	30,593
Total	9,083	30,593
30-59 Days [Member] | Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	4,768	5,617
30-59 Days [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,657	2,106
30-59 Days [Member] | Originated [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,806	2,249
30-59 Days [Member] | Originated [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,154	1,053
30-59 Days [Member] | Originated [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	151	209
30-59 Days [Member] | Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	635	1,675
30-59 Days [Member] | Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	565	1,043
30-59 Days [Member] | Originated [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	44	298
30-59 Days [Member] | Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,022	431
30-59 Days [Member] | Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,197	908
30-59 Days [Member] | Originated [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	151	209
30-59 Days [Member] | PNCI [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,347	3,871
30-59 Days [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	2,655
30-59 Days [Member] | PNCI [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	282	538
30-59 Days [Member] | PNCI [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	820	678
30-59 Days [Member] | PNCI [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	245
30-59 Days [Member] | PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	1,009
30-59 Days [Member] | PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	62	74
30-59 Days [Member] | PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	119	160
30-59 Days [Member] | PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	1,646
30-59 Days [Member] | PNCI [Member] | Commercial [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	245
30-59 Days [Member] | PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	101	304
60-89 Days [Member] | Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,525	1,999
60-89 Days [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,306	1,332
60-89 Days [Member] | Originated [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	659	88
60-89 Days [Member] | Originated [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,560	579
60-89 Days [Member] | Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,132	132
60-89 Days [Member] | Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	89	24
60-89 Days [Member] | Originated [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	13	17
60-89 Days [Member] | Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	174	1,200
60-89 Days [Member] | Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	557	47
60-89 Days [Member] | PNCI [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,100	1,449
60-89 Days [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	877	1,269
60-89 Days [Member] | PNCI [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	73	35
60-89 Days [Member] | PNCI [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	150	145
60-89 Days [Member] | PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	682	133
60-89 Days [Member] | PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	195	1,136
60-89 Days [Member] | PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	73	35
> 90 Days [Member] | Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,373	2,844
> 90 Days [Member] | Originated [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,659	774
> 90 Days [Member] | Originated [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	381	823
> 90 Days [Member] | Originated [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	333	1,247
> 90 Days [Member] | Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	758	478
> 90 Days [Member] | Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	217	214
> 90 Days [Member] | Originated [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	7
> 90 Days [Member] | Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	901	296
> 90 Days [Member] | Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	157	609
> 90 Days [Member] | PNCI [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,087	1,588
> 90 Days [Member] | PNCI [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	950	1,238
> 90 Days [Member] | PNCI [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	24	237
> 90 Days [Member] | PNCI [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	113	113
> 90 Days [Member] | PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due		156
> 90 Days [Member] | PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	950	1,082
> 90 Days [Member] | PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 24	$ 237

Allowance for Loan Losses - Add

Allowance for Loan Losses - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Originated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Interest income on non accrual loans	$ 289,000	$ 341,000	$ 568,000	$ 626,000
Interest income on non accrual loans ,recognized	53,000	53,000	86,000	75,000
Impaired TDR Loans			10,998,000	9,450,000	$ 10,253,000
Obligations to lend additional funds on TDR			0	0	0
PNCI [Member]
Loans and Leases Receivable Disclosure [Line Items]
Interest income on non accrual loans	160,000	26,000	281,000	54,000
Interest income on non accrual loans ,recognized	$ 111,000	$ 12,000	171,000	11,000
Impaired TDR Loans			811,000	1,459,000	615,000
Obligations to lend additional funds on TDR			$ 0	$ 0	$ 0

Allowance for Loan Losses - S_3

Allowance for Loan Losses - Schedule of Non Accrual Loans (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 18,629	$ 22,274
Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	11,472	14,309
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,101	4,090
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	4,056	3,875
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,657	3,578
Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,644	1,769
Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	61	7
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	7,815	10,731
Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,396	2,314
Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	14,132	19,416
Originated [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	7,711	12,507
Originated [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	2,548	3,154
Originated [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,873	3,755
Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,357	3,244
Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	1,610	1,722
Originated [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	58	3
Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	4,354	9,263
Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	880	1,429
PNCI [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	4,497	2,858
PNCI [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,761	1,802
PNCI [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	553	936
PNCI [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	183	120
PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	300	334
PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	34	47
PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3	4
PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	3,461	1,468
PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 516	$ 885

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans (Detail) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Originated [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 21,577	$ 25,693	$ 27,385
Recorded investment with no related allowance	13,537	17,455	20,904
Recorded investment with related allowance	6,122	6,528	4,539
Total recorded investment	19,659	23,983	25,443
Related Allowance	2,237	2,426	1,948
Average recorded investment	22,921	23,431	24,713
Interest income recognized	86	75	386
Originated [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	12,645	16,936	17,675
Recorded investment with no related allowance	8,808	13,710	14,339
Recorded investment with related allowance	2,765	2,126	2,073
Total recorded investment	11,573	15,836	16,412
Related Allowance	862	229	98
Average recorded investment	14,295	15,575	16,632
Interest income recognized	58	37	227
Originated [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	3,782	3,805	4,277
Recorded investment with no related allowance	2,845	2,936	3,641
Recorded investment with related allowance	322	460	179
Total recorded investment	3,167	3,396	3,820
Related Allowance	74	70	76
Average recorded investment	3,561	3,102	3,422
Interest income recognized	13	18	68
Originated [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,150	4,952	5,433
Recorded investment with no related allowance	1,884	809	2,924
Recorded investment with related allowance	3,035	3,942	2,287
Total recorded investment	4,919	4,751	5,211
Related Allowance	1,301	2,127	1,774
Average recorded investment	5,065	4,686	4,654
Interest income recognized	15	20	91
Originated [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Average recorded investment		68	5
Originated [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	4,739	5,656	4,594
Recorded investment with no related allowance	3,705	3,947	3,663
Recorded investment with related allowance	300	1,050	308
Total recorded investment	4,005	4,997	3,971
Related Allowance	54	147	56
Average recorded investment	4,291	4,600	3,517
Interest income recognized	18	28	90
Originated [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	2,373	2,558	2,374
Recorded investment with no related allowance	1,571	1,828	1,892
Recorded investment with related allowance	268	351	65
Total recorded investment	1,839	2,179	1,957
Related Allowance	61	38	2
Average recorded investment	2,003	1,784	1,520
Interest income recognized	4	15	23
Originated [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	76	3	3
Recorded investment with no related allowance	3
Recorded investment with related allowance	54	3	3
Total recorded investment	57	3	3
Related Allowance	13	3	3
Average recorded investment	48	3	17
Interest income recognized	1		2
Originated [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	7,906	11,280	13,081
Recorded investment with no related allowance	5,103	9,763	10,676
Recorded investment with related allowance	2,465	1,076	1,765
Total recorded investment	7,568	10,839	12,441
Related Allowance	808	82	42
Average recorded investment	10,004	10,975	13,115
Interest income recognized	40	9	137
Originated [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	1,333	1,244	1,900
Recorded investment with no related allowance	1,271	1,108	1,749
Recorded investment with related allowance		106	111
Total recorded investment	1,271	1,214	1,860
Related Allowance		29	71
Average recorded investment	1,510	1,315	1,885
Interest income recognized	8	3	43
Originated [Member] | Residential [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Average recorded investment		68	5
PNCI [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	6,372	3,375	4,990
Recorded investment with no related allowance	4,619	2,236	2,570
Recorded investment with related allowance	417	992	656
Total recorded investment	5,036	3,228	3,226
Related Allowance	205	463	246
Average recorded investment	4,156	3,075	3,691
Interest income recognized	171	11	207
PNCI [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,418	1,740	3,485
Recorded investment with no related allowance	3,762	1,671	1,802
Total recorded investment	3,762	1,671	1,802
Average recorded investment	2,782	1,500	2,242
Interest income recognized	171	9	188
PNCI [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	841	1,635	1,385
Recorded investment with no related allowance	744	565	655
Recorded investment with related allowance	347	992	649
Total recorded investment	1,091	1,557	1,304
Related Allowance	135	463	239
Average recorded investment	1,223	1,575	1,389
Interest income recognized		2	18
PNCI [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	113		120
Recorded investment with no related allowance	113		113
Recorded investment with related allowance	70		7
Total recorded investment	183		120
Related Allowance	70		7
Average recorded investment	151		60
Interest income recognized			1
PNCI [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	339	1,417	375
Recorded investment with no related allowance	300	1,348	334
Total recorded investment	300	1,348	334
Average recorded investment	317	1,339	529
Interest income recognized			5
PNCI [Member] | Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	167	293	252
Recorded investment with no related allowance	148	36	47
Recorded investment with related allowance	69	242	197
Total recorded investment	217	278	244
Related Allowance	44	154	101
Average recorded investment	229	281	155
PNCI [Member] | Other Consumer [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	62	244	106
Recorded investment with no related allowance	62		21
Recorded investment with related allowance	37	244	85
Total recorded investment	99	244	106
Related Allowance	6	51	11
Average recorded investment	105	259	114
PNCI [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	5,079	323	3,110
Recorded investment with no related allowance	3,462	323	1,468
Total recorded investment	3,462	323	1,468
Average recorded investment	2,465	161	1,713
Interest income recognized	171	9	183
PNCI [Member] | Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	612	1,098	1,027
Recorded investment with no related allowance	534	529	587
Recorded investment with related allowance	241	506	367
Total recorded investment	775	1,035	954
Related Allowance	85	258	127
Average recorded investment	$ 889	1,035	1,120
Interest income recognized		$ 2	$ 18

Allowance for Loan Losses - Tro

Allowance for Loan Losses - Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)SecurityLoan	Jun. 30, 2018USD ($)SecurityLoanBranches	Jun. 30, 2019USD ($)SecurityLoanBranches	Jun. 30, 2018USD ($)BranchesSecurityLoan
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	6	3	10	6
Pre-mod outstanding principal balance	$ 1,847	$ 450	$ 2,145	$ 1,087
Post-mod outstanding principal balance	1,817	455	2,114	1,097
Financial impact due to TDR taken as additional provision	$ 29	$ 32	$ 31	$ 44
Number that defaulted during the period | Branches		4	1	5
Recorded investment of TDRs that defaulted during the period		$ 340	$ 7	$ 509
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions		$ (2)		$ (2)
Mortgage Loans on Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan		1	1	2
Pre-mod outstanding principal balance		$ 34	$ 163	$ 417
Post-mod outstanding principal balance		34	$ 162	417
Financial impact due to TDR taken as additional provision		$ 34		$ 46
Number that defaulted during the period | Branches				1
Recorded investment of TDRs that defaulted during the period				$ 169
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	2		3	2
Pre-mod outstanding principal balance	$ 93		$ 214	$ 254
Post-mod outstanding principal balance	95		215	$ 259
Financial impact due to TDR taken as additional provision	$ 27		$ 29
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	4	2	6	2
Pre-mod outstanding principal balance	$ 1,754	$ 416	$ 1,768	$ 416
Post-mod outstanding principal balance	1,722	421	1,737	421
Financial impact due to TDR taken as additional provision	$ 2	$ (2)	$ 2	$ (2)
Number that defaulted during the period | Branches		4	1	4
Recorded investment of TDRs that defaulted during the period		$ 340	$ 7	$ 340
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions		$ (2)		$ (2)
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan			1
Pre-mod outstanding principal balance			$ 163
Post-mod outstanding principal balance			$ 162
Home Equity Loans [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	1		2	1
Pre-mod outstanding principal balance	$ 28		$ 149	$ 121
Post-mod outstanding principal balance	27		147	$ 121
Financial impact due to TDR taken as additional provision	$ 27		$ 29
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan		1		2
Pre-mod outstanding principal balance		$ 34		$ 417
Post-mod outstanding principal balance		34		417
Financial impact due to TDR taken as additional provision		$ 34		$ 46
Number that defaulted during the period | Branches				1
Recorded investment of TDRs that defaulted during the period				$ 169
Home Equity Lines of Credit [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number | SecurityLoan	1		1	1
Pre-mod outstanding principal balance	$ 65		$ 65	$ 133
Post-mod outstanding principal balance	$ 68		$ 68	$ 138

Leases - Lease Costs and Other

Leases - Lease Costs and Other Lease Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Operating lease cost	$ 1,310	$ 2,621
Short-term lease cost	58	129
Variable lease cost	(17)	(22)
Sublease income	(32)	(66)
Total lease cost	$ 1,319	$ 2,662

Leases - Additional Informatio

Leases - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Operating Leases, Rent Expense	$ 892,000	$ 1,776,000,000
Rental Income, Nonoperating	$ 10,000	$ 21,000,000

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information Related To Operating Leases (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 1,229	$ 2,447
ROUA obtained in exchange for operating lease liabilities	$ 156	$ 156	$ 0

Leases - Weighted Average Lease

Leases - Weighted Average Lease Term And Discount Rate Related To Operating Lease (Detail)	Jun. 30, 2019
Operating Lease, Weighted Average Remaining Lease Term	9 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	3.18%

Leases - Future Minimum Rental

Leases - Future Minimum Rental Payments For Operating Leases (Detail) $ in Thousands	Jun. 30, 2019USD ($)
2019	$ 2,352
2020	4,387
2021	4,235
2022	3,896
2023	3,216
Thereafter	16,682
Operating Leases, Future Minimum Payments Due	34,768
Discount for present value of expected cash flows	(5,334)
Lease liability at June 30, 2019	$ 29,434

Deposits - Summary of Balances

Deposits - Summary of Balances of Deposits (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deposits [Abstract]
Noninterest-bearing demand	$ 1,780,339	$ 1,760,580
Interest-bearing demand	1,263,635	1,252,366
Savings	1,856,749	1,921,324
Time certificates, $250,000 or more	130,061	132,429
Other time certificates	311,389	299,767
Total deposits	$ 5,342,173	$ 5,366,466

Deposits - Additional Informati

Deposits - Additional Information (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Schedule Of Deposits [Line Items]
Overdrawn deposit balances classified as consumer loans	$ 1,242,000	$ 1,469,000
California [Member]
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	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit
Construction [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	210,143	248,996
RE Mortgage [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	173,451	140,292
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	11,338	11,346
Commercial [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	311,850	306,191
Consumer Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	506,448	496,575
Deposit Account Overdraft Privilege [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Commitments to extend credit	$ 108,941	$ 111,956

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Aug. 21, 2007
Class of Stock [Line Items]
Cash dividends received	$ 10,236,000	$ 4,770,000	$ 18,350,000	$ 9,142,000
Repurchase of common stock									500,000
Common stock, shares outstanding	30,502,757		30,502,757			30,417,223
Market value of shares repurchased under equity compensation plans			$ 4,695,000	$ 671,000
2007 Stock Repurchase Plan [Member]
Class of Stock [Line Items]
Common stock, shares outstanding	0	0	0	0
Cumulative number of shares repurchased	196,566		196,566
Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares outstanding	30,502,757	23,004,153	30,502,757	23,004,153	30,432,419	30,417,223	22,956,323	22,955,963
Company's common stock in lieu of cash to exercise options to purchase shares	93,755	17,086	119,914	17,220
Market value of shares repurchased under equity compensation plans	$ 3,659,000	$ 667,000	$ 4,695,000	$ 671,000

Stock Options and Other Equit_3

Stock Options and Other Equity-Based Incentive Instruments - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Apr. 16, 2019	Dec. 31, 2018
Restricted Stock Units (RSUs) [Member] | Market Plus Service Condition Vesting RSUs [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units outstanding expected to vest	53,611	53,611		45,536
Weighted-average remaining contractual term		2 years 1 month 6 days
Pre-tax compensation costs	$ 1,227,000	$ 1,227,000
Number of units released		22,237
Restricted Stock Units (RSUs) [Member] | Service Condition Vesting RSUs [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units outstanding expected to vest	76,527	76,527		66,947
Options available for grant under the plan	76,527	76,527
Options currently not exercisable yet expected to vest	750	750
Weighted-average remaining contractual term	1 year 4 months 24 days
Pre-tax compensation costs	$ 2,495,000	$ 2,495,000
Number of units released		26,211
Maximum [Member] | Restricted Stock Units (RSUs) [Member] | Market Plus Service Condition Vesting RSUs [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of units released	80,417
2019 Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Aggregate number of shares of TriCo's common stock issued			1,500,000
2009 Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
2009 plan Expired		Mar. 26, 2019

Stock Options and Other Equit_4

Stock Options and Other Equity-Based Incentive Instruments - Stock Option Activity (Detail)	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Number of Shares, beginning balance | shares	343,000
Options exercised, Number of Shares | shares	(157,000)
Options outstanding, Number of Shares, ending balance | shares	186,000
Options outstanding, Weighted Average Exercise Price, beginning balance	$ 16.67
Options exercised, Weighted Average Exercise Price	15.92
Options outstanding, Weighted Average Exercise Price, ending balance	17.45
Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Option Price per Share, beginning balance	12.63
Options exercised, Option Price per Share	12.63
Options outstanding, Option Price per Share, ending balance	14.54
Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Option Price per Share, beginning balance	23.21
Options exercised, Option Price per Share	19.46
Options outstanding, Option Price per Share, ending balance	$ 23.21

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	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	186,000	343,000
Weighted average exercise price	$ 17.45	$ 16.67
Intrinsic value (in thousands)	$ 3,785
Weighted average remaining contractual term (yrs.)	3 years 1 month 6 days
Currently Exercisable [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	185,250
Weighted average exercise price	$ 17.43
Intrinsic value (in thousands)	$ 3,774
Weighted average remaining contractual term (yrs.)	3 years 1 month 6 days
Currently Not Exercisable [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	750
Weighted average exercise price	$ 23.21
Intrinsic value (in thousands)	$ 11
Weighted average remaining contractual term (yrs.)	5 years 3 months 18 days

Stock Options and Other Equit_6

Stock Options and Other Equity-Based Incentive Instruments - Restricted Stock Unit (RSU) Activity (Detail) - Restricted Stock Units (RSUs) [Member]	6 Months Ended
	Jun. 30, 2019shares
Market Plus Service Condition Vesting RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, Number of RSUs, beginning balance	45,536
RSUs granted, Number of RSUs	22,898
RSUs added through dividend and performance credits, Number of RSUs	7,414
RSUs released through vesting, Number of RSUs	(22,237)
RSUs outstanding, Number of RSUs, ending balance	53,611
Service Condition Vesting RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs outstanding, Number of RSUs, beginning balance	66,947
RSUs granted, Number of RSUs	35,272
RSUs added through dividend and performance credits, Number of RSUs	519
RSUs released through vesting, Number of RSUs	(26,211)
RSUs outstanding, Number of RSUs, ending balance	76,527

Noninterest Income and Expens_2

Noninterest Income and Expense - Components of Other Noninterest Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ 10,128	$ 9,228	$ 19,198	$ 18,584
Increase in cash value of life insurance	746	656	1,521	1,264
Asset management and commission income	739	810	1,381	1,686
Gain on sale of loans	575	666	987	1,292
Lease brokerage income	239	200	459	328
Sale of customer checks	135	138	275	239
Gain on sale of foreclosed assets	197	17	199	388
Gain (loss) on marketable equity securities	42	(23)	78	(70)
Loss on disposal of fixed assets	(42)	(41)	(80)	(54)
Other	819	523	1,327	807
Total other noninterest income	3,450	2,946	6,244	5,880
Total noninterest income	13,578	12,174	25,442	24,464
ATM and Interchange Fees [Member]
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	5,404	4,510	9,985	8,745
Service Charges on Deposit Accounts [Member]
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	4,182	3,613	8,062	7,392
Other Service Fees [Member]
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	619	630	1,390	1,344
Mortgage Banking Service Fees [Member]
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	475	511	958	1,028
Change in Value of Mortgage Servicing Rights [Member]
Schedule Of Other Noninterest Income And Expense [Line Items]
Total service charges and fees	$ (552)	$ (36)	$ (1,197)	$ 75

Noninterest Income and Expens_3

Noninterest Income and Expense - Components of Noninterest Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Base salaries, net of deferred loan origination costs	$ 17,211	$ 14,429	$ 33,968	$ 28,391
Incentive compensation	3,706	2,159	6,273	4,611
Benefits and other compensation costs	5,802	4,865	11,606	10,103
Total salaries and benefits expense	26,719	21,453	51,847	43,105
Occupancy	3,738	2,720	7,512	5,401
Data processing and software	3,354	2,679	6,703	5,193
Equipment	1,752	1,637	3,619	3,188
Intangible amortization	1,431	339	2,862	678
Advertising	1,533	1,035	2,864	1,873
ATM and POS network charges	1,270	1,437	2,593	2,663
Professional fees	1,057	774	1,896	1,546
Telecommunications	773	681	1,570	1,382
Regulatory assessments and insurance	490	417	1,001	847
Merger and acquisition expense		601		1,077
Postage	315	301	625	659
Operational losses	226	252	451	546
Courier service	412	224	682	491
Other miscellaneous expense	3,782	3,320	8,140	7,383
Total other noninterest expense	20,133	16,417	40,518	32,927
Total noninterest expense	$ 46,852	$ 37,870	$ 92,365	$ 76,032

Earnings Per Share - Computatio

Earnings Per Share - Computation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 23,061	$ 15,029	$ 45,787	$ 28,939
Average number of common shares outstanding	30,458	22,983	30,441	22,970
Effect of dilutive stock options and restricted stock	185	293	209	310
Average number of common shares outstanding used to calculate diluted earnings per share	30,643	23,276	30,650	23,280

Comprehensive Income - Componen

Comprehensive Income - Components of Other Comprehensive Income (Loss) and Related Tax Effects (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Comprehensive Income (Loss)
Unrealized holding gains (losses) on available for sale securities before reclassifications	$ 9,553	$ (5,676)	$ 22,263	$ (20,941)
Amounts reclassified out of accumulated other comprehensive income:
Total amounts reclassified out of accumulated other comprehensive income		0		(363)
Unrealized holding gains (losses) on available for sale securities after reclassifications	9,553	(5,676)	22,263	(21,304)
Tax effect	(2,824)	1,678	(6,582)	6,280
Unrealized holding gains (losses) on available for sale securities, net of tax	6,729	(3,998)	15,681	(15,024)
Change in unfunded status of the supplemental retirement plans before reclassifications	(89)	0	(177)	668
Amounts reclassified out of accumulated other comprehensive income:
Amortization of prior service cost	(13)	(13)	(27)	(27)
Amortization of actuarial losses	102	127	204	254
Total amounts reclassified out of accumulated other comprehensive income	89	114	177	(441)
Change in unfunded status of the supplemental retirement plans after reclassifications		114		227
Tax effect		(34)		(67)
Change in unfunded status of the supplemental retirement plans, net of tax		80		160
Other comprehensive income (loss)	$ 6,729	(3,918)	$ 15,681	(14,864)
ASU 2016-01 [Member]
Amounts reclassified out of accumulated other comprehensive income:
Total amounts reclassified out of accumulated other comprehensive income		0		62
ASU 2018-02 [Member]
Amounts reclassified out of accumulated other comprehensive income:
Total amounts reclassified out of accumulated other comprehensive income		0		(425)
Amounts reclassified out of accumulated other comprehensive income:
Total amounts reclassified out of accumulated other comprehensive income		$ 0		$ (668)

Comprehensive Income - Compon_2

Comprehensive Income - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (2,198)	$ (17,879)
Net Unrealized Loss on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	1,289	(20,974)
Accumulated other comprehensive loss, tax effect	(381)	6,201
Accumulated other comprehensive loss	908	(14,773)
Unfunded Status of Supplemental Retirement Plans [Member]
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 loss	(3,382)	(3,382)
Joint Beneficiary Agreement Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, before tax	276	276
Accumulated other comprehensive loss	$ 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	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 1,149,050	$ 1,128,695
Marketable Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,952	2,874
Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	630,911	629,981
Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	125,980	126,072
Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	4,521	4,478
Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	372,582	354,505
Loans Held For Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	5,875	3,687
Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,229	7,098
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,952	2,874
Level 1 [Member] | Marketable Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	2,952	2,874
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,139,869	1,118,723
Level 2 [Member] | Obligations of U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	630,911	629,981
Level 2 [Member] | Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	125,980	126,072
Level 2 [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	4,521	4,478
Level 2 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	372,582	354,505
Level 2 [Member] | Loans Held For Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	5,875	3,687
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	6,229	7,098
Level 3 [Member] | Mortgage Servicing Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 6,229	$ 7,098

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Transfers between level 1 to level 2, Assets	$ 0	$ 0
Transfers between level 2 to level 1, Assets	0	0
Transfers between level 1 to level 2, Liabilities	0	0
Transfers between level 2 to level 1, Liabilities	0	0
Transfer into level 3	0	0
Transfer out of level 3	0	$ 0
Carrying value of loans fully charged-off	$ 0

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 [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 6,572	$ 6,953	$ 7,098	$ 6,687
Change Included in Earnings	(552)	(36)	(1,197)	75
Issuances	209	104	328	259
Ending Balance	$ 6,229	$ 7,021	$ 6,229	$ 7,021

Fair Value Measurement - Quanti

Fair Value Measurement - Quantitative Information about Recurring Level 3 Fair Value Measurements (Detail) - Mortgage Servicing Rights [Member] $ in Thousands	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgages Servicing Rights, Fair Value	$ 6,229	$ 7,098
Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	6.9	5
Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	10	12
Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	39	27.3
Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	14	13
Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Constant Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	10.5	7.6
Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Constant prepayment rate	12	12

Fair Value Measurement - Assets

Fair Value Measurement - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value			$ 281
Fair Value Nonrecurring Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,618	$ 2,231	1,592
Total Gains/(Losses)	(871)	(595)	(302)
Fair Value Nonrecurring Basis [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,164	1,647	281
Total Gains/(Losses)	(808)	(505)	(294)
Fair Value Nonrecurring Basis [Member] | Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	454	584	1,311
Total Gains/(Losses)	(63)	(90)	(8)
Fair Value Nonrecurring Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,618	2,231	1,592
Fair Value Nonrecurring Basis [Member] | Level 3 [Member] | Impaired Originated & PNCI Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	1,164	1,647	281
Fair Value Nonrecurring Basis [Member] | Level 3 [Member] | Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 454	$ 584	$ 1,311

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	Jun. 30, 2019	Dec. 31, 2018
Impaired Originated & PNCI Loans [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 281
Foreclosed Assets [Member] | Residential Real Estate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		693
Foreclosed Assets [Member] | Commercial Real Estate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value		$ 618
Level 3 [Member] | Sales Comparison Approach [Member] | Minimum [Member] | Impaired Originated & PNCI Loans [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(16.30%)
Level 3 [Member] | Sales Comparison Approach [Member] | Minimum [Member] | Foreclosed Assets [Member] | Residential Real Estate [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(21.83%)
Level 3 [Member] | Sales Comparison Approach [Member] | Minimum [Member] | Foreclosed Assets [Member] | Commercial Real Estate [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(65.00%)
Level 3 [Member] | Sales Comparison Approach [Member] | Maximum [Member] | Impaired Originated & PNCI Loans [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		35.14%
Level 3 [Member] | Sales Comparison Approach [Member] | Maximum [Member] | Foreclosed Assets [Member] | Residential Real Estate [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		7.25%
Level 3 [Member] | Sales Comparison Approach [Member] | Maximum [Member] | Foreclosed Assets [Member] | Commercial Real Estate [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		20.00%
Level 3 [Member] | Sales Comparison Approach [Member] | Weighted Average [Member] | Impaired Originated & PNCI Loans [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		10.45%
Level 3 [Member] | Sales Comparison Approach [Member] | Weighted Average [Member] | Foreclosed Assets [Member] | Residential Real Estate [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(3.75%)
Level 3 [Member] | Sales Comparison Approach [Member] | Weighted Average [Member] | Foreclosed Assets [Member] | Commercial Real Estate [Member] | Adjustment for Differences between Comparable Sales [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average		(45.00%)

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	Jun. 30, 2019	Dec. 31, 2018
Financial assets:
Cash and due from banks	$ 106,939	$ 119,781
Cash at Federal Reserve and other banks	68,643	107,752
Securities held to maturity	412,524	444,936
Loans held for sale	5,875	3,687
Financial liabilities:
Other borrowings	13,292	15,839
Junior subordinated debt	57,132	57,042
Level 3 [Member] | Overdraft Privilege Commitments [Member]
Off-balance sheet:
Contract amount, Off-balance sheet	108,941	111,956
Level 3 [Member] | Standby Letters of Credit [Member]
Off-balance sheet:
Contract amount, Off-balance sheet	11,338	11,346
Level 3 [Member] | Commitments [Member]
Off-balance sheet:
Contract amount, Off-balance sheet	1,201,892	1,192,054
Fair Value [Member] | Level 3 [Member]
Financial assets:
Loans, net	4,057,792	4,006,986
Financial liabilities:
Junior subordinated debt	56,209	62,610
Fair Value [Member] | Level 3 [Member] | Overdraft Privilege Commitments [Member]
Off-balance sheet:
Fair value, Off-balance sheet	1,089	1,120
Fair Value [Member] | Level 3 [Member] | Standby Letters of Credit [Member]
Off-balance sheet:
Fair value, Off-balance sheet	113	113
Fair Value [Member] | Level 3 [Member] | Commitments [Member]
Off-balance sheet:
Fair value, Off-balance sheet	12,019	11,921
Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and due from banks	106,939	119,781
Cash at Federal Reserve and other banks	68,643	107,752
Fair Value [Member] | Level 2 [Member]
Financial assets:
Securities held to maturity	415,276	437,370
Loans held for sale	5,875	4,616
Financial liabilities:
Deposits	5,341,105	5,362,173
Other borrowings	13,292	15,839
Carrying Amount [Member] | Level 3 [Member]
Financial assets:
Loans, net	4,070,819	3,989,432
Financial liabilities:
Junior subordinated debt	57,132	57,042
Carrying Amount [Member] | Level 1 [Member]
Financial assets:
Cash and due from banks	106,939	119,781
Cash at Federal Reserve and other banks	68,643	107,752
Carrying Amount [Member] | Level 2 [Member]
Financial assets:
Securities held to maturity	412,524	444,936
Restricted equity securities	17,250	17,250
Loans held for sale	5,875	3,687
Financial liabilities:
Deposits	5,342,173	5,366,466
Other borrowings	$ 13,292	$ 15,839

Regulatory Matters - Actual and

Regulatory Matters - Actual and Required Capital Ratios of Bank (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	8.00%	8.00%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%
Parent [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Actual, Amount	$ 718,901	$ 682,419
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	683,043	647,262
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	627,627	591,933
Tier 1 Capital (to Average Assets), Actual, Amount	$ 683,043	$ 647,262
Total Capital (to Risk Weighted Assets), Actual, Ratio	14.93%	14.40%
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	14.19%	13.66%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.03%	12.49%
Tier 1 Capital (to Average Assets), Actual, Ratio	11.08%	10.68%
Parent [Member] | Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount		$ 467,874
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount		373,115
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount		302,045
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount		$ 242,452
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio		9.875%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio		7.875%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio		6.375%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio		4.00%
Parent [Member] | Basel III Fully Phased In [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	$ 505,569	$ 497,486
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	409,270	402,727
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	337,046	331,658
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 246,599	$ 242,452
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	10.50%	10.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.50%	8.50%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	7.00%	7.00%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Tri Countries Bank [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Actual, Amount	$ 714,018	$ 680,624
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	678,160	645,467
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	678,160	645,467
Tier 1 Capital (to Average Assets), Actual, Amount	$ 678,160	$ 645,467
Total Capital (to Risk Weighted Assets), Actual, Ratio	14.83%	14.37%
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	14.09%	13.63%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	14.09%	13.63%
Tier 1 Capital (to Average Assets), Actual, Ratio	11.00%	10.65%
Total Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 481,320	$ 473,624
Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	385,056	378,899
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	312,858	307,856
Tier 1 Capital (to Average Assets), Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	308,242	303,059
Tri Countries Bank [Member] | Basel III Phase-in Schedule [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount		467,704
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount		372,979
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount		301,935
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount		$ 242,447
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio		9.875%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio		7.875%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio		6.375%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio		4.00%
Tri Countries Bank [Member] | Basel III Fully Phased In [Member]
Schedule of Capitalization [Line Items]
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	505,385	$ 497,305
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	409,122	402,581
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	336,924	331,537
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	$ 246,594	$ 242,447
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	10.50%	10.50%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.50%	8.50%
Common Equity Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	7.00%	7.00%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%