Lakeland Bancorp (LBAI) 10-K 1 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 22, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	LBAI
Entity Registrant Name	LAKELAND BANCORP INC
Entity Central Index Key	846,901
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		50,336,797
Entity Public Float			$ 901,226,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash	$ 205,199	$ 114,138
Interest-bearing deposits due from banks	3,400	28,795
Total cash and cash equivalents	208,599	142,933
Investment securities, available for sale, at fair value	638,618	628,046
Equity securities, at fair value	15,921	18,089
Investment securities, held to maturity, at amortized cost with fair value of $150,932 at December 31, 2018 and $138,688 at December 31, 2017	153,646	139,685
Federal Home Loan Bank and other membership stock, at cost	13,301	12,576
Loans and leases, net of deferred fees	4,456,733	4,152,720
Less: allowance for loan and lease losses	37,688	35,455
Net loans	4,419,045	4,117,265
Loans held for sale	1,113	456
Premises and equipment, net	49,175	50,313
Accrued interest receivable	16,114	14,416
Goodwill	136,433	136,433
Other identifiable intangible assets	1,768	2,362
Bank owned life insurance	110,052	107,489
Other assets	42,308	35,576
TOTAL ASSETS	5,806,093	5,405,639
Deposits:
Noninterest-bearing	950,218	967,335
Savings and interest-bearing transaction accounts	2,913,414	2,663,985
Time deposits $250 thousand and under	589,737	556,863
Time deposits over $250 thousand	167,301	180,565
Total deposits	4,620,670	4,368,748
Federal funds purchased and securities sold under agreements to repurchase	233,905	124,936
Other borrowings	181,118	192,011
Subordinated debentures	105,027	104,902
Other liabilities	41,634	31,920
TOTAL LIABILITIES	5,182,354	4,822,517
STOCKHOLDERS’ EQUITY:
Common stock, no par value; authorized 100,000,000 shares; issued shares, 47,486,250 at December 31, 2018 and authorized 70,000,000 shares; issued shares 47,353,864 at December 31, 2017	514,703	512,734
Retained earnings	116,874	72,737
Accumulated other comprehensive loss	(7,838)	(2,349)
TOTAL STOCKHOLDERS’ EQUITY	623,739	583,122
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 5,806,093	$ 5,405,639

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Investment securities held to maturity; fair value	$ 150,932	$ 138,688
Common stock, par value
Common stock, shares authorized	100,000,000	70,000,000
Common stock, shares issued	47,486,250	47,353,864

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INTEREST INCOME
Loans, leases and fees	$ 193,143,000	$ 172,342,000	$ 149,777,000
Federal funds sold and interest-bearing deposits with banks	1,559,000	880,000	569,000
Taxable investment securities and other	16,710,000	14,987,000	11,163,000
Tax-exempt investment securities	1,709,000	1,995,000	1,787,000
TOTAL INTEREST INCOME	213,121,000	190,204,000	163,296,000
INTEREST EXPENSE
Deposits	30,620,000	16,600,000	10,512,000
Federal funds purchased and securities sold under agreements to repurchase	471,000	198,000	69,000
Other borrowings	8,471,000	8,168,000	7,066,000
TOTAL INTEREST EXPENSE	39,562,000	24,966,000	17,647,000
NET INTEREST INCOME	173,559,000	165,238,000	145,649,000
Provision for loan and lease losses	4,413,000	6,090,000	4,223,000
NET INTEREST INCOME AFTER PROVISION FOR LOAN AND LEASE LOSSES	169,146,000	159,148,000	141,426,000
NONINTEREST INCOME
Service charges on deposit accounts	10,584,000	10,740,000	10,157,000
Commissions and fees	5,542,000	4,858,000	4,349,000
Income on bank owned life insurance	3,256,000	2,354,000	2,562,000
Loss on equity securities	(583,000)	0	0
Gains on sales of loans	1,329,000	1,836,000	2,123,000
Gain on sales and calls of investment securities, net	0	2,524,000	370,000
Other income	2,182,000	3,123,000	1,769,000
TOTAL NONINTEREST INCOME	22,310,000	25,435,000	21,330,000
NONINTEREST EXPENSE
Salaries and employee benefits	68,595,000	61,166,000	56,107,000
Net occupancy expense	10,155,000	10,243,000	9,935,000
Furniture and equipment	8,297,000	8,269,000	8,017,000
FDIC insurance expense	1,608,000	1,577,000	2,248,000
Stationery, supplies and postage	1,625,000	1,797,000	1,727,000
Marketing expense	1,437,000	1,675,000	1,672,000
Data processing expense	3,609,000	1,993,000	1,891,000
Telecommunications expense	1,769,000	1,607,000	1,631,000
ATM and debit card expense	2,195,000	2,051,000	1,582,000
Core deposit intangible amortization	594,000	654,000	734,000
Other real estate and repossessed asset expense	158,000	181,000	116,000
Long-term debt prepayment fee	0	2,828,000	0
Merger related expenses	464,000	0	4,103,000
Other expenses	10,661,000	10,493,000	10,154,000
TOTAL NONINTEREST EXPENSE	111,167,000	104,534,000	99,917,000
Income before provision for income taxes	80,289,000	80,049,000	62,839,000
Provision for income taxes	16,888,000	27,469,000	21,321,000
NET INCOME	$ 63,401,000	$ 52,580,000	$ 41,518,000
PER SHARE OF COMMON STOCK:
Basic earnings (usd per share)	$ 1.32	$ 1.10	$ 0.96
Diluted earnings (usd per share)	1.32	1.09	0.95
Cash dividends (usd per share)	$ 0.45	$ 0.4	$ 0.37

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 63,401	$ 52,580	$ 41,518
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Unrealized losses on securities available for sale	(3,507)	(903)	(1,038)
Reclassification for securities gains included in net income	0	(1,640)	(233)
Unrealized gains on derivatives	41	37	672
Change in pension liability, net	20	(16)	42
Other comprehensive loss	(3,446)	(2,522)	(557)
TOTAL COMPREHENSIVE INCOME	$ 59,955	$ 50,058	$ 40,961

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Pascack Bancorp, Inc.	Harmony Bank	Common Stock	Common StockPascack Bancorp, Inc.	Common StockHarmony Bank	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period at Dec. 31, 2015	$ 400,516			$ 386,287			$ 13,079	$ 1,150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	41,518						41,518
Other comprehensive income (loss), net of tax	(557)							(557)
Stock based compensation	1,899			1,899
Issuance of stock for acquisition		$ 37,221	$ 36,654		$ 37,221	$ 36,654
Issuance of stock	48,678			48,678
Retirement of restricted stock	(206)			(206)
Exercise of stock options, net of excess tax benefits	328			328
Cash dividends, common stock	(16,007)						(16,007)
Balance at end of period at Dec. 31, 2016	550,044			510,861			38,590	593
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	52,580						52,580
Other comprehensive income (loss), net of tax	(2,522)							(2,522)
Stock based compensation	2,325			2,325
Retirement of restricted stock	(773)			(773)
Exercise of stock options, net of excess tax benefits	321			321
Cash dividends, common stock	(18,853)						(18,853)
Adjustment related to implementation of ASU 2018-02							420	(420)
Balance at end of period at Dec. 31, 2017	583,122			512,734			72,737	(2,349)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment for adoption							2,000	(420)
Net income	63,401						63,401
Other comprehensive income (loss), net of tax	(3,446)							(3,446)
Stock based compensation	2,425			2,425
Retirement of restricted stock	(763)			(763)
Exercise of stock options, net of excess tax benefits	307			307
Cash dividends, common stock	(21,307)						(21,307)
Balance at end of period at Dec. 31, 2018	$ 623,739			$ 514,703			$ 116,874	$ (7,838)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 63,401	$ 52,580	$ 41,518
Adjustments to reconcile net income to net cash provided by operating activities:
Net amortization of premiums, discounts and deferred loan fees and costs	4,153	5,153	4,581
Depreciation and amortization	5,555	4,536	3,961
Amortization of intangible assets	594	654	734
Provision for loan and lease losses	4,413	6,090	4,223
Stock based compensation	2,425	2,325	1,899
Loans originated for sale	(49,748)	(60,783)	(85,365)
Proceeds from sales of loans held for sale	50,420	63,905	86,859
Gains on sales of securities	0	(2,524)	(370)
Gains on sales of loans held for sale	(1,329)	(1,836)	(2,003)
Gains on proceeds from bank owned life insurance policies	(421)	(109)	(864)
Change in market value of equity securities	583	0	0
Gains on other real estate and other repossessed assets	(338)	(646)	(248)
Loss (gain) on sale of premises and equipment	561	(838)	117
Long-term debt prepayment penalty	0	2,828	0
Deferred tax (benefit) expense	(13,571)	16,904	(987)
Excess tax benefits	318	587	0
Decrease (increase) in other assets	2,679	(25,065)	(5,600)
Increase in other liabilities	9,743	3,705	1,618
NET CASH PROVIDED BY OPERATING ACTIVITIES	79,438	67,466	50,073
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash acquired in acquisitions	0	0	68,751
Proceeds from repayments and maturities of available for sale securities	91,833	91,314	79,425
Proceeds from repayments and maturities of held to maturity securities	26,083	43,218	28,421
Proceeds from sales of equity securities	2,155	0	0
Proceeds from sales of available for sale securities	0	4,500	15,654
Purchase of available for sale securities	(110,370)	(140,258)	(244,861)
Purchase of held to maturity securities	(40,753)	(35,841)	(59,715)
Purchase of equity securities	(570)	(307)	(838)
Proceeds from redemptions of Federal Home Loan Bank stock	6,799	13,497	3,054
Purchases of Federal Home Loan Bank stock	(7,524)	(10,974)	(323)
Purchase of bank owned life insurance	0	(33,000)	0
Death benefit proceeds from bank owned life insurance policy	755	312	2,129
Net increase in loans and leases	(310,256)	(289,914)	(334,040)
Proceeds from dispositions and sales of bank premises and equipment	697	1,638	21
Purchases of premises and equipment	(5,523)	(3,972)	(3,977)
Proceeds from sales of other real estate and other repossessed assets	4,116	4,638	3,545
NET CASH USED IN INVESTING ACTIVITIES	(342,558)	(355,149)	(442,754)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in deposits	252,329	276,537	515,437
Increase (decrease) in federal funds purchased and securities sold under agreements to repurchase	108,969	68,582	(94,880)
Proceeds from other borrowings	60,003	306,184	14,921
Repayments of other borrowings	(70,752)	(377,183)	(91,798)
Net proceeds from issuance of subordinated debt	0	0	73,516
Exercise of stock options	307	321	285
Net proceeds from issuance of common stock	0	0	48,678
Retirement of restricted stock	(763)	(773)	(206)
Excess tax benefits	0	0	43
Dividends paid	(21,307)	(18,853)	(16,007)
NET CASH PROVIDED BY FINANCING ACTIVITIES	328,786	254,815	449,989
Net increase (decrease) in cash and cash equivalents	65,666	(32,868)	57,308
Cash and cash equivalents, beginning of year	142,933	175,801	118,493
CASH AND CASH EQUIVALENTS, END OF YEAR	208,599	142,933	175,801
Supplemental schedule of non-cash investing and financing activities:
Cash paid during the period for income taxes	18,614	27,423	21,744
Cash paid during the period for interest	38,679	24,571	16,435
Transfer of loans and leases into other repossessed assets and other real estate owned	3,765	3,763	3,386
Pascack and Harmony
Non-cash assets acquired:
Federal Home Loan Bank stock	0	0	3,742
Investment securities held for maturity	0	0	10,810
Investment securities available for sale	0	0	7,474
Loans, including loans held for sale	0	0	579,560
Goodwill and other intangible assets, net	0	0	29,060
Other assets	0	0	32,381
Total non-cash assets acquired	0	0	663,027
Liabilities assumed:
Deposits	0	0	(582,526)
Other borrowings	0	0	(66,622)
Other liabilities	0	0	(8,755)
Total liabilities assumed	0	0	(657,903)
Common stock issued for acquisitions	$ 0	$ 0	$ 73,875

Summary of Accounting Policies

Summary of Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Accounting Policies	SUMMARY OF ACCOUNTING POLICIES Lakeland Bancorp, Inc. (the “Company”) is a bank holding company whose principal activity is the ownership and management of its wholly owned subsidiary, Lakeland Bank (“Lakeland”). Lakeland operates under a state bank charter and provides full banking services and, as a state bank, is subject to regulation by the New Jersey Department of Banking and Insurance. Lakeland generates commercial, mortgage and consumer loans and receives deposits from customers located primarily in Northern and Central New Jersey. Through a third party, Lakeland also provides non-deposit products, such as securities brokerage services including mutual funds and variable annuities. Lakeland operates as a commercial bank offering a wide variety of commercial loans and leases and, to a lesser degree, consumer credits. Its primary strategic aim is to establish a reputation and market presence as the “small and middle market business bank” in its principal markets. Lakeland funds its loans primarily by offering demand deposit, savings and money market, and time deposit accounts to both commercial enterprises and individuals. Additionally, it originates residential mortgage loans, and services such loans which are owned by other investors. Lakeland also has an equipment finance division which provides loans to finance equipment primarily to small and medium sized business clients (referred to as "Leases") and an asset based lending department which specializes in utilizing particular assets to fund the working capital needs of borrowers. The Company and Lakeland are subject to regulations of certain state and federal agencies and, accordingly, are periodically examined by those regulatory authorities. As a consequence of the extensive regulation of commercial banking activities, Lakeland’s business is particularly susceptible to being affected by state and federal legislation and regulations. Basis of Financial Statement Presentation The accounting and reporting policies of the Company and its subsidiaries conform with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and predominant practices within the banking industry. The consolidated financial statements include the accounts of the Company, Lakeland, Lakeland NJ Investment Corp., Lakeland Investment Corp., Lakeland Equity, Inc. and Lakeland Preferred Equity, Inc. All significant intercompany balances and transactions have been eliminated in consolidation. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications. The preparation of financial statements 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. These estimates and assumptions also affect reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. The principal estimates that are particularly susceptible to significant change in the near term relate to the allowance for loan and lease losses and the valuation of the Company’s investment securities portfolio. The policies regarding these estimates are discussed below. The Company’s operating segments are components of its enterprise for which separate financial information is available and is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The Company’s chief operating decision maker is its Chief Executive Officer. All of the Company’s financial services activities are interrelated, and each activity is dependent and assessed based on how each of the activities of the Company supports the others. For example, commercial lending is dependent upon the ability of Lakeland to fund itself with retail deposits and other borrowings and to manage interest rate and credit risk. The situation is also similar for consumer and residential mortgage lending. Moreover, the Company primarily operates in one market area, Northern and Central New Jersey and contiguous areas. Therefore, all significant operating decisions are based upon analysis of the Company as one operating segment or unit. Accordingly, the Company has determined that it has one operating segment and thus one reporting segment. Cash and Cash Equivalents Cash and cash equivalents are defined as cash on hand, cash items in the process of collection, amounts due from banks and federal funds sold with an original maturity of three months or less. A portion of Lakeland’s cash on hand and on deposit with the Federal Reserve Bank was required to meet regulatory reserve and clearing requirements. Investment Securities Investment securities are classified as held to maturity or available for sale. Management determines the appropriate classification of investment securities at the time of purchase. Investments in securities, for which management has both the ability and intent to hold to maturity, are classified as held to maturity and carried at cost, adjusted for the amortization of premiums and accretion of discounts computed by the effective interest method. Investments in debt securities, which management believes may be sold prior to maturity due to changes in interest rates, prepayment risk, liquidity requirements, or other factors, are classified as available for sale. Net unrealized gains and losses for such securities, net of tax effect, are reported as other comprehensive income (loss) and excluded from the determination of net income. Gains or losses on disposition of investment securities are based on the net proceeds and the adjusted carrying amount of the securities sold using the specific identification method. Losses are recorded through the statement of income when the impairment is considered other-than-temporary, even if a decision to sell has not been made. The Company evaluates its investment securities portfolio for impairment each quarter. In estimating other-than-temporary losses, the Company considers the length of time and the extent to which the fair value has been less than cost, the financial condition and near-term prospects of the issuer, and whether the Company is more likely than not to sell the security before recovery of its cost basis. If a security has been impaired for more than twelve months, and the impairment is deemed other-than-temporary, a write down will occur in that quarter. If a loss is deemed to be other-than-temporary, it is recognized as a realized loss in the income statement with the security assigned a new cost basis. If the Company intends to sell an impaired security, the Company records an other-than-temporary loss in an amount equal to the entire difference between the fair value and amortized cost. If a security is determined to be other-than-temporarily impaired, but the Company does not intend to sell the security, only the credit portion of the estimated loss is recognized in earnings in gain (loss) on securities, with the other portion of the loss recognized in other comprehensive income. If a determination is made that an equity security is other-than-temporarily impaired, the unrealized loss will be recognized as an other-than-temporary impairment charge in noninterest income as a component of gain (loss) on investment securities. The Company has an equity securities portfolio, which consists of investments in other financial institutions for market appreciation purposes, and recognizes net unrealized gains and losses through net income. Loans and Leases and Allowance for Loan and Lease Losses Loans and leases that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at the amount of unpaid principal and are net of unearned discount, unearned loan fees and an allowance for loan and lease losses. Interest income is accrued as earned on a simple interest basis, adjusted for prepayments. All unamortized fees and costs related to the loan are amortized over the life of the loan using the interest method. Accrual of interest is discontinued on a loan or lease when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of interest and principal is doubtful. When a loan or lease is placed on such non-accrual status, all accumulated accrued interest receivable is reversed out of current period income. Commercial loans and leases are placed on a non-accrual status with all accrued interest and unpaid interest reversed if (a) because of the deterioration in the financial position of the borrowers they are maintained on a cash basis (which means payments are applied when and as received rather than on a regularly scheduled basis), (b) payment in full of interest or principal is not expected, or (c) principal and interest have been in default for a period of 90 days or more unless the obligation is both well-secured and in process of collection. Residential mortgage loans and closed-end consumer loans are placed on non-accrual status at the time principal and interest have been in default for a period of 90 days or more, except where there exists sufficient collateral to cover the defaulted principal and interest payments, and the loans are well-secured and in the process of collection. Open-end consumer loans secured by real estate are generally placed on non-accrual and reviewed for charge-off when principal and interest payments are four months in arrears unless the obligations are well-secured and in the process of collection. Interest thereafter on such charged-off loans is taken into income when received only after full recovery of principal. As a general rule, a non-accrual asset may be restored to accrual status when none of its principal or interest is due and unpaid, satisfactory payments have been received for a sustained period (usually six months), or when it otherwise becomes well-secured and in the process of collection. The Company defines impaired loans as all non-accrual loans with recorded investments of $500,000 or greater. Impaired loans also include all loans modified as troubled debt restructurings. Loans and leases are considered impaired when, based on current information and events, it is probable that Lakeland will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. Impairment is measured based on the present value of expected cash flows discounted at the loan’s effective interest rate, or as a practical expedient, Lakeland may measure impairment based on a loan’s observable market price, or the fair value of the collateral, less estimated costs to sell, if the loan is collateral-dependent. Regardless of the measurement method, Lakeland measures impairment based on the fair value of the collateral when it is determined that foreclosure is probable. Most of Lakeland’s impaired loans are collateral-dependent. Shortfalls in collateral or cash flows are charged-off or specifically reserved for in the period the short-fall is identified. Charge-offs are recommended by the Chief Credit Officer and approved by the Board. Lakeland groups impaired commercial loans under $500,000 into homogeneous pools and collectively evaluates them. Interest received on impaired loans and leases may be recorded as interest income. However, if management is not reasonably certain that an impaired loan and lease will be repaid in full, or if a specific time frame to resolve full collection cannot yet be reasonably determined, all payments received are recorded as reductions of principal. Purchased Credit-Impaired (“PCI”) loans are loans acquired through acquisition or purchased at a discount that is due, in part, to credit quality. PCI loans are accounted for in accordance with ASC Subtopic 310-30 and are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance (i.e., the allowance for loan losses). The difference between the undiscounted cash flows expected at acquisition and the initial carrying amount (fair value) of the covered loans, or the “accretable yield,” is recognized as interest income utilizing the level-yield method over the life of the loans. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment, as a loss accrual or a valuation allowance. Reclassifications of the non-accretable difference to the accretable yield may occur subsequent to the loan acquisition dates due to increases in expected cash flows of the loans and results in an increase in yield on a prospective basis. Subsequent to acquisition date, further credit deterioration of a PCI loan will result in a valuation allowance recognized in the allowance for loan and lease losses. Loans are classified as troubled debt restructured loans ("TDRs") in cases where borrowers experience financial difficulties and Lakeland makes certain concessionary modifications to contractual terms. Restructured loans typically involve a modification of terms such as a reduction of the stated interest rate, an extended moratorium of principal payments and/or an extension of the maturity date at a stated interest rate lower than the current market rate for a new loan with similar risk. Nonetheless, restructured loans are classified as impaired loans. If a loan has been restructured, it will continue to be classified as a TDR until it is fully repaid or until it meets all of the following criteria: 1) the borrower is no longer experiencing financial difficulties, 2) the rate is not less than the rate provided for similar credit risk, 3) other terms are no less favorable than similar new debt and 4) no concessions were granted. The allowance for loan and lease losses is the estimated amount considered necessary to cover probable and reasonably estimable incurred losses inherent in the loan portfolio at the balance sheet date. In determining the allowance, we make significant estimates and judgments, and, therefore, have identified the allowance as a critical accounting policy. The allowance is established through a provision for loan and lease losses charged against income. Loan principal considered to be uncollectible by management is charged against the allowance. The allowance for loan and lease losses has been determined in accordance with U.S. GAAP. We are responsible for the timely and periodic determination of the amount of the allowance required. We believe that our allowance is adequate to cover identifiable losses, as well as estimated losses inherent in our portfolio for which certain losses are probable but not specifically identifiable. The determination of the adequacy of the allowance for loan and lease losses and the periodic provisioning for estimated losses included in the consolidated financial statements is the responsibility of management and the Board of Directors. Management performs a formal quarterly evaluation of the allowance for loan and lease losses. This quarterly process is performed by the credit administration department and approved by the Chief Credit Officer. All supporting documentation with regard to the evaluation process is maintained by the credit administration department. Each quarter, the evaluation along with the supporting documentation is reviewed by the finance department before approval by the Chief Credit Officer. The allowance evaluation is then presented to an Allowance for Loan and Lease Losses committee, which gives final approval to the allowance evaluation before being presented to the Board of Directors for their approval. Additionally, the Company continually evaluates, through its governance process, the development of the allowance for loan and lease losses methodology. During the third quarter of 2017, the Company refined and enhanced its quantitative framework by implementing loss migration periods to determine historical loss rates. It also enhanced its qualitative framework to complement the loss migration historical loss rates. These enhancements were implemented to increase the level of precision in the allowance for loan and lease losses and did not result in a material change in the required allowance for loan and lease losses. The methodology employed for assessing the adequacy of the allowance consists of the following criteria: • The establishment of specific reserve amounts for impaired loans and leases, including PCI loans. • The establishment of reserves for pools of homogeneous loans and leases not subject to specific review, including impaired loans under $500,000, leases, 1 - 4 family residential mortgages, and consumer loans. The establishment of reserve amounts for pools of homogeneous loans and leases are based upon the determination of historical loss rates, which are adjusted to reflect current conditions through the use of qualitative factors. The qualitative factors considered by the Company includes an evaluation of the results of the Company’s independent loan review function, the Company's reporting capabilities, the adequacy and expertise of Lakeland’s lending staff, underwriting policies, loss histories, trends in the portfolio, delinquency trends, economic and business conditions and capitalization rates. Since many of Lakeland’s loans depend on the sufficiency of collateral as a secondary source of repayment, any adverse trends in the real estate market could affect the underlying values available to protect Lakeland from losses. Additionally, management determines the loss emergence periods for each loan segment, which are used to define loss migration periods and establish appropriate ranges for qualitative adjustments for each loan segment. The loss emergence period is the estimated time from the date of a loss event (such as a personal bankruptcy) to the actual recognition of the loss (typically via the first partial or full loan charge-off), and is determined based upon a study of our past loss experience by loan segment. All of the factors considered in the analysis of the adequacy of the allowance for loan and lease losses may be subject to change. To the extent actual outcomes differ from management estimates, additional provisions for loan and lease losses may be required that would adversely impact earnings in future periods. A loan that management designates as impaired is reviewed for charge-off when it is placed on non-accrual status with a resulting charge-off if the loan is not secured by collateral having sufficient liquidation value to repay the loan if the loan is collateral dependent or charged off if deemed uncollectible. For a loan that is not collateral dependent, a reserve may be established for any shortfall in expected cash flows. Charge-offs are recommended by the Chief Credit Officer and approved by the Board. Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or estimated fair value. Gains and losses on sales of loans are specifically identified and accounted for in accordance with U.S. GAAP which requires that an entity engaged in mortgage banking activities classify the retained mortgage-backed security or other interest, which resulted from the securitization of a mortgage loan held for sale, based upon its ability and intent to sell or hold these investments. Premises and Equipment, Net Premises and equipment, including leasehold improvements, are stated at cost less accumulated depreciation. Depreciation expense is computed on the straight-line method over the estimated useful lives of the assets. Leasehold improvements are depreciated over the shorter of the estimated useful lives of the improvements or the terms of the related leases. Other Real Estate Owned and Other Repossessed Assets Other real estate owned (OREO) and other repossessed assets, representing property acquired through foreclosure (or deed-in-lieu-of-foreclosure), are carried at fair value less estimated disposal costs of the acquired property. Costs relating to holding the assets are charged to expense. An allowance for OREO or other repossessed assets is established, through charges to expense, to maintain properties at fair value less estimated costs to sell. Operating results of OREO and other repossessed assets, including rental income and operating expenses, are included in other expenses. Mortgage Servicing Lakeland performs various servicing functions on loans owned by others. A fee, usually based on a percentage of the outstanding principal balance of the loan, is received for these services. At December 31, 2018 and 2017 , Lakeland was servicing approximately $19.9 million and $23.0 million , respectively, of loans for others. Lakeland originates certain mortgages under a definitive plan to sell or securitize those loans and service the loans owned by the investor. Upon the transfer of the mortgage loans in a sale or a securitization, Lakeland records the servicing assets retained. Lakeland records mortgage servicing rights and the loans based on relative fair values at the date of origination and evaluates the mortgage servicing rights for impairment at each reporting period. Lakeland also originates loans that it sells to other banks and investors and does not retain the servicing rights. Mortgage Servicing Rights When mortgage loans are sold with servicing retained, servicing rights are initially recorded at fair value with the income statement effect recorded in gains on sales of loans. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. As of December 31, 2018 and 2017 , Lakeland had originated mortgage servicing rights of $68,000 and $88,000 , respectively. Under the amortization measurement method, Lakeland subsequently measures servicing rights at fair value at each reporting date and records any impairment in value of servicing assets in earnings in the period in which the impairment occurs. The fair values of servicing rights are subject to fluctuations as a result of changes in estimated and actual prepayment speeds and default rates and losses. Servicing fee income, which is reported on the income statement as commissions and fees, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan, and are recorded as income when earned. Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, put presumptively beyond the reach of the transferor and its creditors even in bankruptcy or other receivership, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets. Derivatives Lakeland enters into interest rate swaps (“swaps”) with loan customers to provide a facility to mitigate the fluctuations in the variable rate on the respective loans. These swaps are matched in offsetting terms to swaps that Lakeland enters into with an outside third party. The swaps are reported at fair value in other assets or other liabilities. Lakeland’s swaps qualify as derivatives, but are not designated as hedging instruments, thus any net gain or loss resulting from changes in the fair value is recognized in other noninterest income. The credit risk associated with derivatives executed with customers is similar as that involved in extending loans and is subject to normal credit policies. Collateral is obtained based on management’s assessment of the customer. The positions of customer derivatives are recorded at fair value and changes in value are included in noninterest income on the consolidated statement of income. Cash flow hedges are used primarily to minimize the variability in cash flows of assets or liabilities, or forecasted transactions caused by interest rate fluctuations. Changes in the fair value of derivatives designated as cash flow hedges are recorded in accumulated other comprehensive income and are reclassified into the line item in the income statement in which the hedged item is recorded in the same period the hedged item affects earnings. Hedge ineffectiveness and gains and losses on the component of a derivative excluded in assessing hedge effectiveness are recorded in the same income statement line item. Further discussion of Lakeland’s financial derivatives is set forth in Note 19 to the Consolidated Financial Statements. Earnings Per Share Earnings per share is calculated on the basis of the weighted average number of common shares outstanding during the year. Basic earnings per share excludes dilution and is computed by dividing income available to common shareholders by the weighted average common shares outstanding during the period. Diluted earnings per share takes into account the potential dilution that could occur if securities or other contracts to issue common stock were exercised and converted into common stock. Employee Benefit Plans The Company has certain employee benefit plans covering substantially all employees. The Company accrues such costs as incurred. We recognize the overfunded or underfunded status of pension and postretirement benefit plans in accordance with U.S. GAAP. Actuarial gains and losses, prior service costs or credits, and any remaining transition assets or obligations are recognized as a component of Accumulated Other Comprehensive Income, net of tax effects, until they are amortized as a component of net periodic benefit cost. Comprehensive Income (Loss) The Company reports comprehensive income (loss) in addition to net income from operations. Other comprehensive income (loss) includes items recorded directly in equity such as unrealized gains or losses on securities available for sale as well as unrealized gains (losses) recorded on derivatives and benefit plans. Goodwill and Other Identifiable Intangible Assets Goodwill is presumed to have an indefinite useful life and is tested, at least annually, for impairment at the reporting unit level. Impairment exists when the carrying amount of goodwill exceeds its implied fair value. For purposes of our goodwill impairment testing, we have identified a single reporting unit, community banking. U.S. GAAP permits an entity to make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test. The Company completed its annual qualitative assessment as of November 30, 2018 and concluded that there was less than a 50% probability that the fair value of the reporting unit is less than its carrying amount and, therefore, the two-step goodwill impairment test was not required. Bank Owned Life Insurance Lakeland invests in bank owned life insurance (“BOLI”). BOLI involves the purchasing of life insurance by Lakeland on a chosen group of employees. Lakeland is the owner and beneficiary of the policies. At December 31, 2018 and 2017 , Lakeland had $110.1 million and $107.5 million , respectively, in BOLI. Income earned on BOLI was $3.3 million , $2.4 million and $2.6 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. BOLI is accounted for using the cash surrender value method and is recorded at its net realizable value. Income Taxes The Company accounts for income taxes under the asset and liability method of accounting for income taxes. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities as measured by the enacted tax rates that will be in effect when these differences reverse. Deferred tax expense is the result of changes in deferred tax assets and liabilities. The principal types of differences between assets and liabilities for financial statement and tax return purposes are allowance for loan and lease losses, core deposit intangibles, deferred loan fees and deferred compensation. Variable Interest Entities Management has determined that Lakeland Bancorp Capital Trust II and Lakeland Bancorp Capital Trust IV (collectively, “the Trusts”) qualify as variable interest entities. The Trusts issued mandatorily redeemable preferred stock to investors and loaned the proceeds to the Company. The Trusts hold, as their sole asset, subordinated debentures issued by the Company. The Company is not considered the primary beneficiary of the Trusts, therefore the Trusts are not consolidated in the Company’s financial statements. The Company’s maximum exposure to the Trusts is $30.0 million at December 31, 2018 which is the Company’s liability to the Trusts and includes the Company’s investment in the Trusts. The Federal Reserve has issued guidance on the regulatory capital treatment for the trust preferred securities issued by the Trusts. The rule retains the current maximum percentage of total capital permitted for trust preferred securities at 25% , but enacts other changes to the rules governing trust preferred securities that affect their use as part of the collection of entities known as “restricted core capital elements.” The rule allows bank holding companies to continue to count trust preferred securities as Tier 1 Capital. The Company’s capital ratios continue to be categorized as “well-capitalized” under the regulatory framework for prompt corrective action. Under the Collins Amendment to the Dodd-Frank Wall Street Reform and Consumer Protection Act, any new issuance of trust preferred securities by the Company would not be eligible as regulatory capital. New Accounting Pronouncements In August 2018, the Financial Accounting Standards Board ("FASB") issued an update to improve the effectiveness of fair value measurement disclosures. Among other provisions, the update removes requirements to disclose amounts and reasons of transfers between Level 1 and Level 2 in the fair value hierarchy, and it modifies the disclosures regarding transfers in and out of Level 3 of the fair value hierarchy. The update requires a discussion regarding the change in unrealized gains and losses included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period, and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. This update will be effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2019. Because the Company does not typically have Level 3 fair value measurements, the update is expected to have an insignificant impact on the Company's financial statements. In August 2018, the FASB issued an update which aligns the requirements for capitalizing implementation costs in a cloud-computing arrangement service contract with the requirements for capitalizing implementation costs incurred for an internal-use software license. Implementation costs incurred by customers in a cloud computing arrangement are to be deferred and recognized over the term of the arrangement, if those costs would be capitalized by the customer in a software licensing arrangement under the internal-use software guidance. This update will be effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2019. The Company is currently assessing the impact that the guidance will have on its financial statements. In August 2018, the FASB issued an update which changes the disclosure of accounting and reporting requirements related to single-employer defined benef

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions	ACQUISITIONS Highlands Bank On January 4, 2019, the Company completed its acquisition of Highlands Bancorp, Inc. ("Highlands"), a bank holding company headquartered in Vernon, New Jersey. Highlands was the parent of Highlands State Bank, which operated four branches in Sussex, Passaic and Morris Counties in New Jersey. This acquisition enabled the Company to broaden its presence in those counties. Effective as of the close of business on January 4, 2019 , Highlands merged into the Company and Highlands State Bank merged into Lakeland. Pursuant to the merger agreement, the shareholders of Highlands received for each outstanding share of Highlands common stock that they owned at the effective time of the merger, 1.015 shares of Lakeland Bancorp, Inc. common stock. The Company issued 2,837,524 shares of its common stock in the merger. Outstanding Highlands options were paid out in cash at the difference between $14.71 and an average strike price of $8.09 for a total cash payment of $797,000 . As of January 4, 2019 , Highlands had total assets, total loans, total deposits and total capital of $480.8 million, $438.3 million, $408.8 million and $31.2 million, respectively. The acquisition was accounted for under the acquisition method of accounting and accordingly, the assets acquired and liabilities assumed in the acquisition were recorded at their estimated fair values as of the acquisition date. Highlands' assets were recorded at their preliminary estimated fair values as of January 4, 2019 and Highlands' results of operations will be included in the Company's Consolidated Statements of Income from that date forward. Harmony Bank On July 1, 2016 , the Company completed its acquisition of Harmony Bank (“Harmony”), a bank located in Ocean County, New Jersey. This merger allowed the Company to expand its presence to Ocean County. The acquisition was accounted for under the acquisition method of accounting and accordingly, the assets acquired and liabilities assumed in the acquisition were recorded at their estimated fair values based on management’s best estimates using information available at the date of the acquisition, including the use of a third party valuation specialist. Harmony's results of operations have been included in the Company's Consolidated Statements of Income since July 1, 2016. Pascack Bancorp On January 7, 2016 , the Company completed its acquisition of Pascack Bancorp, Inc. (“Pascack”), a bank holding company headquartered in Waldwick, New Jersey. Pascack was the parent of Pascack Community Bank, which operated 8 branches in Bergen and Essex Counties in New Jersey. This acquisition enabled the Company to broaden its presence in Bergen and Essex counties. The acquisition was accounted for under the acquisition method of accounting. Accordingly, the assets acquired and liabilities assumed in the acquisition were recorded at their estimated fair values based on management’s best estimates using information available at the date of the acquisition, including the use of a third party valuation specialist. Pascack's results of operations have been included in the Company's Consolidated Statements of Income since January 7, 2016. Direct costs related to the Highlands, Pascack and Harmony acquisitions were expensed as incurred. During the years ended December 31, 2018 and 2016, the Company incurred $464,000 and $4.1 million , respectively, of merger and acquisition integration-related expenses, which have been separately stated in the Company’s Consolidated Statements of Income. There were no merger or acquisition integration-related expenses in 2017.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The Company uses the two class method to compute earnings per common share. Participating securities include non-vested restricted stock and non-vested restricted stock units. The following tables present the computation of basic and diluted earnings per share for the periods presented. Year Ended December 31, 2018 Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share amounts) Basic earnings per share Net income available to common shareholders $ 63,401 47,578 $ 1.33 Less: earnings allocated to participating securities (582 ) — (0.01 ) Net income available to common shareholders $ 62,819 47,578 $ 1.32 Effect of dilutive securities Stock options and restricted stock — 188 — Diluted earnings per share Net income available to common shareholders plus assumed conversions $ 62,819 47,766 $ 1.32 Year Ended December 31, 2017 Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share amounts) Basic earnings per share Net income available to common shareholders $ 52,580 47,438 $ 1.11 Less: earnings allocated to participating securities (480 ) — (0.01 ) Net income available to common shareholders $ 52,100 47,438 $ 1.10 Effect of dilutive securities Stock options and restricted stock — 236 (0.01 ) Diluted earnings per share Net income available to common shareholders plus assumed conversions $ 52,100 47,674 $ 1.09 Year Ended December 31, 2016 Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share amounts) Basic earnings per share Net income available to common shareholders $ 41,518 42,912 $ 0.97 Less: earnings allocated to participating securities (396 ) — (0.01 ) Net income available to common shareholders $ 41,122 42,912 $ 0.96 Effect of dilutive securities Stock options and restricted stock — 202 (0.01 ) Diluted earnings per share Net income available to common shareholders plus assumed conversions $ 41,122 $ 43,114 $ 0.95 There were no antidilutive options to purchase common stock to be excluded from the above computations.

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The amortized cost, gross unrealized gains and losses and the fair value of the Company’s available for sale and held to maturity investment securities are as follows: December 31, 2018 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) AVAILABLE FOR SALE U.S. Treasury and U.S. government agencies $ 143,495 $ — $ (2,568 ) $ 140,927 $ 148,968 $ 78 $ (1,791 ) $ 147,255 Mortgage-backed securities, residential 434,208 779 (8,843 ) 426,144 419,538 479 (5,763 ) 414,254 Mortgage-backed securities, multifamily 21,087 67 (204 ) 20,950 10,133 7 (63 ) 10,077 Obligations of states and political subdivisions 45,951 140 (586 ) 45,505 51,289 448 (417 ) 51,320 Debt securities 5,000 92 — 5,092 5,000 140 — 5,140 $ 649,741 $ 1,078 $ (12,201 ) $ 638,618 $ 634,928 $ 1,152 $ (8,034 ) $ 628,046 December 31, 2018 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) HELD TO MATURITY U.S. government agencies $ 33,025 $ — $ (677 ) $ 32,348 $ 33,415 $ 24 $ (402 ) $ 33,037 Mortgage-backed securities, residential 75,859 169 (1,838 ) 74,190 54,991 249 (978 ) 54,262 Mortgage-backed securities, multifamily 1,853 — (35 ) 1,818 1,957 — (22 ) 1,935 Obligations of states and political subdivisions 37,909 113 (328 ) 37,694 43,318 306 (188 ) 43,436 Debt securities 5,000 — (118 ) 4,882 6,004 14 — 6,018 $ 153,646 $ 282 $ (2,996 ) $ 150,932 $ 139,685 $ 593 $ (1,590 ) $ 138,688 The following table lists contractual maturities of investment securities classified as available for sale and held to maturity at December 31, 2018 . Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (in thousands) Due in one year or less $ 30,766 $ 30,614 $ 7,061 $ 7,066 Due after one year through five years 104,519 102,754 42,103 41,720 Due after five years through ten years 40,768 40,108 23,752 23,185 Due after ten years 18,393 18,048 3,018 2,953 194,446 191,524 75,934 74,924 Mortgage-backed securities 455,295 447,094 77,712 76,008 Total securities $ 649,741 $ 638,618 $ 153,646 $ 150,932 The following table shows proceeds from sales of securities, gross gains and gross losses on sales and calls of securities for the periods indicated: Years Ended December 31, 2018 2017 2016 (in thousands) Sale proceeds $ — $ 4,500 $ 15,654 Gross gains — 2,539 370 Gross losses — (15 ) — Gains or losses on sales of securities are based on the net proceeds and the adjusted carrying amount of the securities sold using the specific identification method. Securities with a carrying value of approximately $476.3 million and $400.4 million at December 31, 2018 and 2017 , respectively, were pledged to secure public deposits and for other purposes required by applicable laws and regulations. The following tables indicates the length of time individual securities have been in a continuous unrealized loss position at December 31, 2018 and 2017 : December 31, 2018 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses (dollars in thousands) AVAILABLE FOR SALE U.S. Treasury and U.S. government agencies $ 20,588 $ 216 $ 120,338 $ 2,352 27 $ 140,926 $ 2,568 Mortgage-backed securities, residential 10,119 58 316,851 8,785 139 326,970 8,843 Mortgage-backed securities, multifamily 1,977 2 12,911 202 4 14,888 204 Obligations of states and political subdivisions 1,289 2 26,522 584 50 27,811 586 $ 33,973 $ 278 $ 476,622 $ 11,923 220 $ 510,595 $ 12,201 HELD TO MATURITY U.S. government agencies $ — $ — $ 32,348 $ 677 6 $ 32,348 $ 677 Mortgage-backed securities, residential 8,325 59 53,761 1,779 36 62,086 1,838 Mortgage-backed securities, multifamily — — 1,818 35 2 1,818 35 Obligations of states and political subdivisions 1,764 8 15,580 320 27 17,344 328 Debt securities 3,882 118 — — 1 3,882 118 $ 13,971 $ 185 $ 103,507 $ 2,811 72 $ 117,478 $ 2,996 December 31, 2017 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Number of securities Fair Value Unrealized Losses (dollars in thousands) AVAILABLE FOR SALE U.S. Treasury and U.S. government agencies $ 80,391 $ 646 $ 54,769 $ 1,145 27 $ 135,160 $ 1,791 Mortgage-backed securities, residential 199,387 1,723 157,739 4,040 118 357,126 5,763 Mortgage-backed securities, multifamily — — 5,088 63 1 5,088 63 Obligations of states and political subdivisions 9,612 77 12,970 340 39 22,582 417 $ 289,390 $ 2,446 $ 230,566 $ 5,588 185 $ 519,956 $ 8,034 HELD TO MATURITY U.S. government agencies $ 15,371 $ 95 $ 6,720 $ 307 4 $ 22,091 $ 402 Mortgage-backed securities, residential 26,090 426 19,203 552 25 45,293 978 Mortgage-backed securities, multifamily 1,935 22 — — 2 1,935 22 Obligations of states and political subdivisions 15,353 56 6,028 132 23 21,381 188 $ 58,749 $ 599 $ 31,951 $ 991 54 $ 90,700 $ 1,590 Management has evaluated the securities in the above table and has concluded that none of the securities with unrealized losses has impairments that are other-than-temporary. Fair value below cost is solely due to interest rate movements and is deemed temporary. Investment securities, including the mortgage-backed securities and corporate securities, are evaluated on a periodic basis to determine if factors are identified that would require further analysis. In evaluating the Company’s securities, management considers the following items: • The Company’s ability and intent to hold the securities, including an evaluation of the need to sell the security to meet certain liquidity measures, or whether the Company has sufficient levels of cash to hold the identified security in order to recover the entire amortized cost of the security; • The financial condition of the underlying issuer; • The credit ratings of the underlying issuer and if any changes in the credit rating have occurred; • The length of time the security’s fair value has been less than amortized cost; and • Adverse conditions related to the security or its issuer if the issuer has failed to make scheduled payments or other factors. If the above factors indicate an additional analysis is required, management will perform a discounted cash flow analysis evaluating the security. Equity securities at fair value The Company has an equity securities portfolio, which consists of investments in other financial institutions for market appreciation purposes and investments in Community Reinvestment funds. The market value of these investments was $15.9 million and $18.1 million as of December 31, 2018 and 2017 , respectively. Upon implementation of Accounting Standards Update 2016-01 - Financial Instruments ("ASU 2016-01"), the Company made a cumulative adjustment of $2.0 million from other comprehensive income to retained earnings as of January 1, 2018. In the twelve months ended December 31, 2018 , the Company recorded $583,000 in market value loss on equity securities in noninterest income. As of December 31, 2018 , the equity investments in other financial institutions and Community Reinvestment funds had a market value of $2.7 million and $13.2 million , respectively. The Community Reinvestment funds include $3.5 million that are primarily invested in community development loans that are guaranteed by the Small Business Administration ("SBA"). Because the funds are primarily guaranteed by the federal government there are minimal changes in market value between accounting periods. These funds can be redeemed within 60 days' notice at the net asset value less unpaid management fees with the approval of the fund manager. As of December 31, 2018 , the net amortized cost equaled the market value of the investment. There are no unfunded commitments related to these investments. The Community Reinvestment funds also include funds that are invested in government guaranteed loans, mortgage-backed securities, small business loans and other instruments supporting affordable housing and economic development. The Company may redeem these funds at the net asset value calculated at the end of the current business day less any unpaid management fees. As of December 31, 2018, the amortized cost of these securities was $10.4 million and the fair value was $9.7 million . There are no restrictions on redemptions for the holdings in these investments other than the notice required by the fund manager. There are no unfunded commitments related to this investment.

Loans and Leases and Other Real

Loans and Leases and Other Real Estate	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans and Leases and Other Real Estate	LOANS AND LEASES AND OTHER REAL ESTATE The following sets forth the composition of Lakeland’s loan and lease portfolio: December 31, 2018 2017 (in thousands) Commercial, secured by real estate $ 3,057,779 $ 2,831,184 Commercial, industrial and other 336,735 340,400 Leases 87,925 75,039 Real estate - residential mortgage 329,854 322,880 Real estate - construction 319,545 264,908 Home equity and consumer 328,609 322,269 Total loans and leases 4,460,447 4,156,680 Less deferred fees (3,714 ) (3,960 ) Loans and leases, net of deferred fees $ 4,456,733 $ 4,152,720 At December 31, 2018 and December 31, 2017 , Lakeland had $1.2 billion and $1.1 billion in loans pledged for potential borrowings at the Federal Home Loan Bank of New York (“FHLB”). As of December 31, 2018 and 2017 , home equity and consumer loans included overdraft deposit balances of $452,000 and $966,000 , respectively. Purchased Credit Impaired Loans The carrying value of loans acquired in the Pascack acquisition and accounted for in accordance with ASC Subtopic 310-30, “Loans and Debt Securities Acquired with Deteriorated Credit Quality,” was $157,000 at December 31, 2018 , which was $661,000 less than the balance at the time of acquisition on January 7, 2016 . In the first quarter of 2017, one of the Pascack purchased credit impaired ("PCI") loans totaling $127,000 experienced further credit deterioration and was fully charged off. Also in the second quarter of 2017, one of the Pascack PCI loans totaling $218,000 was fully paid off. The carrying value of loans acquired in the Harmony acquisition was $495,000 at December 31, 2018 which was $274,000 less than the balance at the acquisition date on July 1, 2016. In the second quarter of 2017, a Harmony PCI loan with a net value of $247,000 was fully paid off. Under ASC Subtopic 310-30, PCI loans may be aggregated and accounted for as pools of loans if the loans being aggregated have common risk characteristics. The Company elected to account for the loans with evidence of credit deterioration individually rather than aggregate them into pools. The following table presents changes in the accretable yield for PCI loans (in thousands): Years Ended December 31, 2018 2017 Balance, beginning of period $ 129 $ 145 Accretion (182 ) (202 ) Net reclassification non-accretable difference 134 186 Balance, end of period $ 81 $ 129 Portfolio Segments Lakeland currently manages its credit products and the respective exposure to credit losses (credit risk) by the following specific portfolio segments which are levels at which Lakeland develops and documents its systematic methodology to determine the allowance for loan and lease losses attributable to each respective portfolio segment. These segments are: • Commercial, secured by real estate - consists of commercial mortgage loans secured by owner occupied properties and non-owner occupied properties. The loans secured by owner occupied properties involve a variety of property types to conduct the borrower’s operations. The primary source of repayment for this type of loan is the cash flow from the business and is based upon the borrower’s financial health and the ability of the borrower and the business to repay. The loans secured by non-owner occupied properties involve investment properties for warehouse, retail, office space, etc., with a history of occupancy and cash flow. This commercial real estate category contains mortgage loans to the developers and owners of commercial real estate where the borrower intends to operate or sell the property at a profit and use the income stream or proceeds from the sale to repay the loan. • Commercial, industrial and other - are loans made to provide funds for equipment and general corporate needs. Repayment of a loan primarily uses the funds obtained from the operation of the borrower’s business. Commercial loans also include lines of credit that are utilized to finance a borrower’s short-term credit needs and/or to finance a percentage of eligible receivables and inventory. • Leases - includes a small portfolio of equipment leases, which consists of leases primarily for essential equipment used by small to medium sized businesses. • Real estate - residential mortgage - contains permanent mortgage loans principally to consumers secured by residential real estate. Residential real estate loans are evaluated for the adequacy of repayment sources at the time of approval, based upon measures including credit scores, debt-to-income ratios, and collateral values. Loans may be either conforming or non-conforming. • Real estate - construction - construction loans, as defined, are intended to finance the construction of commercial properties and include loans for the acquisition and development of land. Construction loans represent a higher degree of risk than permanent real estate loans and may be affected by a variety of factors such as the borrower’s ability to control costs and adhere to time schedules and the risk that constructed units may not be absorbed by the market within the anticipated time frame or at the anticipated price. The loan commitment on these loans often includes an interest reserve to pay interest charges on the outstanding balance of the loan. • Home equity and consumer - includes primarily home equity loans and lines, installment loans, personal lines of credit and automobile loans. The home equity category consists mainly of loans and revolving lines of credit to consumers which are secured by residential real estate. These loans are typically secured with second mortgages on the homes, although many are secured with first mortgages. Other consumer loans include installment loans used by customers to purchase automobiles, boats and recreational vehicles. Non-accrual and Past Due Loans The following schedule sets forth certain information regarding Lakeland’s non-accrual loans and leases, its other real estate owned and other repossessed assets, and accruing troubled debt restructurings (“TDRs”) (in thousands): At December 31, 2018 2017 Commercial, secured by real estate $ 7,192 $ 5,890 Commercial, industrial and other 1,019 184 Leases 501 144 Real estate - residential mortgage 1,986 3,860 Real estate - construction — 1,472 Home equity and consumer 1,432 2,105 Total non-accrual loans and leases 12,130 13,655 Other real estate and other repossessed assets 830 843 Total non-performing assets $ 12,960 $ 14,498 Troubled debt restructurings, still accruing $ 9,293 $ 11,462 Non-accrual loans included $3.6 million and $2.7 million of TDRs for the years ended December 31, 2018 and 2017 , respectively. As of December 31, 2018 , the Company had $1.5 million in residential mortgages and consumer home equity loans included in the table above that were in the process of foreclosure. An age analysis of past due loans, segregated by class of loans as of December 31, 2018 and 2017 , is as follows: December 31, 2018 30-59 Days Past Due 60-89 Days Past Due Greater Than 89 Days Total Past Due Current Total Loans and Leases Recorded Investment Greater than 89 Days and Still Accruing (in thousands) Commercial, secured by real estate $ 1,477 $ 639 $ 2,237 $ 4,353 $ 3,053,426 $ 3,057,779 $ — Commercial, industrial and other 173 243 750 1,166 335,569 336,735 — Leases 533 13 501 1,047 86,878 87,925 — Real estate - residential mortgage 743 111 1,776 2,630 327,224 329,854 — Real estate - construction — — — — 319,545 319,545 — Home equity and consumer 1,917 216 850 2,983 325,626 328,609 — $ 4,843 $ 1,222 $ 6,114 $ 12,179 $ 4,448,268 $ 4,460,447 $ — December 31, 2017 30-59 Days Past Due 60-89 Days Past Due Greater Than 89 Days Total Past Due Current Total Loans and Leases Recorded Investment Greater than 89 Days and Still Accruing (in thousands) Commercial, secured by real estate $ 3,663 $ 1,082 $ 3,817 $ 8,562 $ 2,822,622 $ 2,831,184 $ — Commercial, industrial and other 80 121 56 257 340,143 340,400 — Leases 496 139 144 779 74,260 75,039 — Real estate - residential mortgage 939 908 3,137 4,984 317,896 322,880 — Real estate - construction — — 1,472 1,472 263,436 264,908 — Home equity and consumer 1,258 310 1,386 2,954 319,315 322,269 200 $ 6,436 $ 2,560 $ 10,012 $ 19,008 $ 4,137,672 $ 4,156,680 $ 200 Impaired Loans Lakeland’s policy regarding impaired loans is discussed in Note 1 – Summary of Accounting Policies – Loans and Leases and Allowance for Loan and Lease Losses. The Company defines impaired loans as all non-accrual loans with recorded investments of $500,000 or greater. Impaired loans also includes all loans modified in troubled debt restructurings. The following tables represent the Company's impaired loans at December 31, 2018 , 2017 and 2016 . December 31, 2018 Recorded Investment in Impaired Loans Contractual Unpaid Principal Balance Related Allowance Interest Income Recognized Average Investment in Impaired Loans (in thousands) Loans without related allowance: Commercial, secured by real estate $ 9,284 $ 9,829 $ — $ 188 $ 7,369 Commercial, industrial and other 1,151 1,449 — 19 1,834 Leases 301 597 — — 376 Real estate - residential mortgage — — — 4 242 Real estate - construction — — — — 726 Home equity and consumer — — — — — Loans with related allowance: Commercial, secured by real estate 7,270 7,597 307 317 7,594 Commercial, industrial and other 209 209 7 12 209 Leases 30 30 14 — 19 Real estate - residential mortgage 730 884 4 20 745 Real estate - construction — — — — — Home equity and consumer 727 765 6 32 898 Total: Commercial, secured by real estate $ 16,554 $ 17,426 $ 307 $ 505 $ 14,963 Commercial, industrial and other 1,360 1,658 7 31 2,043 Leases 331 627 14 — 395 Real estate - residential mortgage 730 884 4 24 987 Real estate - construction — — — — 726 Home equity and consumer 727 765 6 32 898 $ 19,702 $ 21,360 $ 338 $ 592 $ 20,012 December 31, 2017 Recorded Investment in Impaired Loans Contractual Unpaid Principal Balance Related Allowance Interest Income Recognized Average Investment in Impaired Loans (in thousands) Loans without related allowance: Commercial, secured by real estate $ 12,155 $ 12,497 $ — $ 366 $ 12,774 Commercial, industrial and other 618 618 — 25 618 Leases — — — — — Real estate - residential mortgage 963 980 — 15 996 Real estate - construction 1,471 1,471 — — 1,471 Home equity and consumer — — — — 6 Loans with related allowance: Commercial, secured by real estate 5,381 5,721 454 206 5,029 Commercial, industrial and other 164 164 9 14 283 Leases 65 65 30 — 29 Real estate - residential mortgage 781 919 4 27 940 Real estate - construction — — — — — Home equity and consumer 993 1,026 8 52 1,090 Total: Commercial, secured by real estate $ 17,536 $ 18,218 $ 454 $ 572 $ 17,803 Commercial, industrial and other 782 782 9 39 901 Leases 65 65 30 — 29 Real estate - residential mortgage 1,744 1,899 4 42 1,936 Real estate - construction 1,471 1,471 — — 1,471 Home equity and consumer 993 1,026 8 52 1,096 $ 22,591 $ 23,461 $ 505 $ 705 $ 23,236 December 31, 2016 Recorded Investment in Impaired Loans Contractual Unpaid Principal Balance Related Allowance Interest Income Recognized Average Investment in Impaired Loans (in thousands) Loans without related allowance: Commercial, secured by real estate $ 12,764 $ 13,195 $ — $ 229 $ 13,631 Commercial, industrial and other 603 603 — 24 1,109 Leases — — — — — Real estate - residential mortgage 1,880 3,146 — 16 2,430 Real estate - construction 1,471 1,471 — — 12 Home equity and consumer 139 139 — — 388 Loans with related allowance: Commercial, secured by real estate 5,860 6,142 392 273 6,549 Commercial, industrial and other 349 349 12 17 360 Leases — — — — 1 Real estate - residential mortgage 1,031 1,100 31 30 1,011 Real estate - construction — — — — — Home equity and consumer 1,188 1,211 94 59 1,184 Total: Commercial, secured by real estate $ 18,624 $ 19,337 $ 392 $ 502 $ 20,180 Commercial, industrial and other 952 952 12 41 1,469 Leases — — — — 1 Real estate - residential mortgage 2,911 4,246 31 46 3,441 Real estate - construction 1,471 1,471 — — 12 Home equity and consumer 1,327 1,350 94 59 1,572 $ 25,285 $ 27,356 $ 529 $ 648 $ 26,675 Interest which would have been accrued on impaired loans and leases during 2018 , 2017 and 2016 was $1.1 million , $1.5 million and $1.7 million , respectively. Credit Quality Indicators The class of loans are determined by internal risk rating. Management closely and continually monitors the quality of its loans and leases and assesses the quantitative and qualitative risks arising from the credit quality of its loans and leases. It is the policy of Lakeland to require that a Credit Risk Rating be assigned to all commercial loans and loan commitments. The Credit Risk Rating System has been developed by management to provide a methodology to be used by Loan Officers, Department Heads and Senior Management in identifying various levels of credit risk that exist within Lakeland’s loan portfolios. The risk rating system assists Senior Management in evaluating Lakeland’s loan portfolio, analyzing trends and determining the proper level of required reserves to be recommended to the Board. In assigning risk ratings, management considers, among other things, a borrower’s debt service coverage, earnings strength, loan to value ratios, industry conditions and economic conditions. Management categorizes loans and commitments into a one (1) to nine (9) numerical structure with rating 1 being the strongest rating and rating 9 being the weakest. Ratings 1 through 5W are considered “Pass” ratings. “Pass” ratings on loans are given to loans that management considers to be of acceptable or better quality. A rating of 5W, or “Watch” is a loan that requires more than the usual amount of monitoring due to declining earnings, strained cash flow, increasing leverage and/or weakening market. These borrowers generally have limited additional debt capacity and modest coverage and average or below average asset quality, margins and market share. Rating 6, “Other Assets Especially Mentioned” is used for loans exhibiting identifiable credit weakness which if not checked or corrected could weaken the loan quality or inadequately protect the bank’s credit position at some future date. Rating 7, “Substandard,” is used on loans that are inadequately protected by the current sound worth and paying capacity of the obligors or of the collateral pledged, if any. A substandard loan has a well-defined weakness or weaknesses that may jeopardize the liquidation of the debt. Rating 8, “Doubtful,” are loans that exhibit all of the weaknesses inherent in substandard loans, but have the added characteristics that the weaknesses make collection or liquidation in full improbable on the basis of existing facts. Rating 9, “Loss,” is a rating for loans or portions of loans that are considered uncollectible and of such little value that their continuance as bankable loans is not warranted. The following table shows Lakeland’s commercial loan portfolio as of December 31, 2018 and 2017 , by the risk ratings discussed above (in thousands): December 31, 2018 Commercial, Secured by Real Estate Commercial, Industrial and Other RISK RATING Real Estate - Construction 1 $ — $ 1,119 $ — 2 — 18,462 — 3 69,995 36,367 — 4 933,577 91,145 17,375 5 1,910,423 168,474 297,625 5W - Watch 61,626 7,798 3,493 6 - Other assets especially mentioned 38,844 2,033 — 7 - Substandard 43,314 11,337 1,052 8 - Doubtful — — — 9 - Loss — — — Total $ 3,057,779 $ 336,735 $ 319,545 December 31, 2017 Commercial, Secured by Real Estate Commercial, Industrial and Other RISK RATING Real Estate - Construction 1 $ — $ 392 $ — 2 — 26,968 — 3 76,824 35,950 — 4 862,537 96,426 15,502 5 1,779,908 150,928 246,806 5W - Watch 47,178 8,779 — 6 - Other assets especially mentioned 40,245 8,670 — 7 - Substandard 24,492 12,287 2,600 8 - Doubtful — — — 9 - Loss — — — Total $ 2,831,184 $ 340,400 $ 264,908 This table does not include residential mortgage loans, consumer loans, or leases because they are evaluated on their payment status as pass or substandard, which is defined as non-accrual or past due 90 days or more. Allowance for Loan and Lease Losses The following table details activity in the allowance for loan and lease losses by portfolio segment and the related recorded investment in loans and leases for the years ended December 31, 2018 and 2017 : December 31, 2018 Commercial, Secured by Real Estate Commercial, Industrial and Other Leases Real Estate - Residential Mortgage Real Estate - Construction Home Equity and Consumer Total (in thousands) Beginning balance $ 25,704 $ 2,313 $ 630 $ 1,557 $ 2,731 $ 2,520 $ 35,455 Charge-offs (421 ) (1,452 ) (507 ) (131 ) (248 ) (588 ) (3,347 ) Recoveries 468 317 23 10 17 332 1,167 Provision 2,130 564 841 130 515 233 4,413 Ending balance $ 27,881 $ 1,742 $ 987 $ 1,566 $ 3,015 $ 2,497 $ 37,688 Allowance for Loan and Leases Losses Ending balance: Individually evaluated for impairment $ 307 $ 7 $ 14 $ 4 $ — $ 6 $ 338 Ending balance: Collectively evaluated for impairment 27,574 1,735 973 1,562 3,015 2,491 37,350 Ending balance $ 27,881 $ 1,742 $ 987 $ 1,566 $ 3,015 $ 2,497 $ 37,688 Loans and Leases Ending balance: Individually evaluated for impairment $ 16,554 $ 1,360 $ 331 $ 730 $ — $ 727 $ 19,702 Ending balance: Collectively evaluated for impairment 3,040,573 335,375 87,594 329,124 319,545 327,882 4,440,093 Ending balance: Loans acquired with deteriorated credit quality 652 — — — — — 652 Ending balance (1) $ 3,057,779 $ 336,735 $ 87,925 $ 329,854 $ 319,545 $ 328,609 $ 4,460,447 (1) Excludes deferred fees December 31, 2017 Commercial, Secured by Real Estate Commercial, Industrial and Other Leases Real Estate - Residential Mortgage Real Estate - Construction Home Equity and Consumer Total (in thousands) Beginning balance $ 21,223 $ 1,723 $ 548 $ 1,964 $ 2,352 $ 3,435 $ 31,245 Charge-offs (762 ) (477 ) (305 ) (441 ) (609 ) (852 ) (3,446 ) Recoveries 396 172 59 5 31 903 1,566 Provision 4,847 895 328 29 957 (966 ) 6,090 Ending balance $ 25,704 $ 2,313 $ 630 $ 1,557 $ 2,731 $ 2,520 $ 35,455 Allowance for Loan and Leases Losses Ending balance: Individually evaluated for impairment $ 454 $ 9 $ 30 $ 4 $ — $ 8 $ 505 Ending balance: Collectively evaluated for impairment 25,250 2,304 600 1,553 2,731 2,512 34,950 Ending balance $ 25,704 $ 2,313 $ 630 $ 1,557 $ 2,731 $ 2,520 $ 35,455 Loans and Leases Ending balance: Individually evaluated for impairment $ 17,536 $ 782 $ 65 $ 1,744 $ 1,471 $ 993 $ 22,591 Ending balance: Collectively evaluated for impairment 2,812,941 339,618 74,974 321,136 263,437 321,273 4,133,379 Ending balance: Loans acquired with deteriorated credit quality 707 — — — — 3 710 Ending balance (1) $ 2,831,184 $ 340,400 $ 75,039 $ 322,880 $ 264,908 $ 322,269 $ 4,156,680 (1) Excludes deferred fees Lakeland also maintains a reserve for unfunded lending commitments which are included in other liabilities. This reserve was $2.3 million and $2.5 million as of December 31, 2018 and December 31, 2017 , respectively. Lakeland analyzes the adequacy of the reserve for unfunded lending commitments in conjunction with its analysis of the adequacy of the allowance for loan and lease losses. For more information on this analysis, see “Risk Elements” in Management’s Discussion and Analysis. Troubled Debt Restructurings Troubled Debt Restructurings ("TDRs") are those loans where significant concessions have been made to borrowers experiencing financial difficulties. Restructured loans typically involve a modification of terms such as a reduction of the stated interest rate lower than the current market rate of a new loan with similar risk, an extended moratorium of principal payments and/or an extension of the maturity date. Lakeland considers the potential losses on these loans as well as the remainder of its impaired loans when considering the adequacy of the allowance for loan losses. The following table summarizes loans and leases that have been restructured during the periods presented: For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment (dollars in thousands) Commercial, secured by real estate 5 $ 3,348 $ 3,348 8 $ 4,618 $ 4,618 Commercial, industrial and other 1 950 950 2 124 124 Leases 1 15 15 6 65 65 7 $ 4,313 $ 4,313 16 $ 4,807 $ 4,807 The following table presents loans and leases modified as TDRs within the previous 12 months from December 31, 2018 and 2017 that have defaulted during the subsequent twelve months: For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 Number of Contracts Recorded Investment Number of Contracts Recorded Investment (dollars in thousands) Commercial, secured by real estate 1 $ 171 — $ — Leases — $ — 2 $ 35 1 $ 171 2 $ 35 Related Party Loans Lakeland has entered into lending transactions in the ordinary course of business with directors, executive officers, principal stockholders and affiliates of such persons on similar terms, including interest rates and collateral, as those prevailing for comparable transactions with other borrowers not related to Lakeland. At December 31, 2018 and 2017 , loans to these related parties amounted to $53.1 million and $27.5 million , respectively. There were new loans of $18.7 million to related parties and repayments of $10.8 million from related parties in 2018 . There was also a net addition of $17.7 million in existing loans for related party relationships that either commenced or ceased during 2018. Mortgages Held for Sale Residential mortgages originated by the bank and held for sale in the secondary market are carried at the lower of cost or fair market value. Fair value is generally determined by the value of purchase commitments on individual loans. Losses are recorded as a valuation allowance and charged to earnings. As of December 31, 2018 , Lakeland had $1.1 million in mortgages held for sale compared to $456,000 as of December 31, 2017 . Lease Receivables Future minimum lease payments of lease receivables are expected as follows (in thousands): 2019 $ 30,384 2020 24,297 2021 18,089 2022 10,814 2023 3,969 Thereafter 372 $ 87,925 Other Real Estate and Other Repossessed Assets At December 31, 2018 , Lakeland had other real estate and other repossessed assets of $830,000 and $0 , respectively. The other real estate that the Company held at December 31, 2018 consisted of $702,000 in residential property acquired as a result of foreclosure proceedings or through a deed in lieu of foreclosure. At December 31, 2017 , Lakeland had other real estate and other repossessed assets of $843,000 and $0 , respectively. The other real estate that the Company held at December 31, 2017 consisted of $843,000 in residential property acquired as a result of foreclosure proceedings or through a deed in lieu of foreclosure. For the years ended December 31, 2018 , 2017 and 2016 , Lakeland had writedowns of $70,000 , $98,000 and $0 , respectively, on other real estate and other repossessed assets which are included in other real estate and repossessed asset expense in the Consolidated Statement of Income.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premises and Equipment	PREMISES AND EQUIPMENT Estimated December 31, Useful Lives 2018 2017 (in thousands) Land Indefinite $ 10,471 $ 10,626 Buildings and building improvements 10 to 50 years 47,006 46,985 Leasehold improvements 10 to 25 years 12,880 12,953 Furniture, fixtures and equipment 2 to 30 years 27,858 26,923 98,215 97,487 Less accumulated depreciation and amortization 49,040 47,174 $ 49,175 $ 50,313 Depreciation expense was $5.3 million , $5.0 million and $5.0 million for the years ended December 31, 2018 , 2017 and 2016 , respectively.

Time Deposits

Time Deposits	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Time Deposits	TIME DEPOSITS At December 31, 2018 , the schedule of maturities of certificates of deposit is as follows (in thousands): Year 2019 $ 568,350 2020 108,881 2021 35,698 2022 41,235 2023 2,874 $ 757,038

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	DEBT Lines of Credit As a member of the Federal Home Loan Bank of New York ("FHLB"), Lakeland has the ability to borrow overnight based on the market value of collateral pledged. At both December 31, 2018 and 2017 , there were no overnight borrowings from the FHLB. As of December 31, 2018 , Lakeland also had overnight federal funds lines available for it to borrow up to $210.0 million . Lakeland borrowed $192.1 million and $80.0 million against these lines as of December 31, 2018 and 2017 , respectively. Lakeland may also borrow from the discount window of the Federal Reserve Bank of New York based on the market value of collateral pledged. Lakeland had no borrowings with the Federal Reserve Bank of New York as of December 31, 2018 or 2017 . Federal Funds Purchased and Securities Sold Under Agreements to Repurchase Short-term borrowings at December 31, 2018 and 2017 consisted of short-term securities sold under agreements to repurchase and federal funds purchased. Securities underlying the agreements were under Lakeland’s control. The following tables summarize information relating to securities sold under agreements to repurchase and federal funds purchased for the years presented. For purposes of the tables, the average amount outstanding was calculated based on a daily average. Federal Funds Purchased 2018 2017 2016 (dollars in thousands) Balance at December 31, $ 192,064 $ 80,000 $ 32,000 Interest rate at December 31, 2.88 % 1.71 % 0.85 % Maximum amount outstanding at any month-end during the year $ 214,165 $ 168,784 $ 133,434 Average amount outstanding during the year $ 21,338 $ 13,264 $ 8,708 Weighted average interest rate during the year 2.03 % 1.42 % 0.71 % Securities Sold Under Agreements to Repurchase 2018 2017 2016 (dollars in thousands) Balance at December 31, $ 41,841 $ 44,936 $ 24,354 Interest rate at December 31, 0.26 % 0.02 % 0.02 % Maximum amount outstanding at any month-end during the year $ 50,526 $ 44,936 $ 32,872 Average amount outstanding during the year $ 32,435 $ 28,480 $ 27,535 Weighted average interest rate during the year 0.12 % 0.03 % 0.03 % Other Borrowings FHLB Debt At December 31, 2018 , advances from the FHLB totaling $181.1 million , with a weighted average interest rate of 2.10% , will mature within 5 years. These advances are collateralized by certain securities and first mortgage loans. At December 31, 2017 , advances from the FHLB totaling $172.0 million , with a weighted average interest rate of 1.69% , will mature within 4 years. These advances are collateralized by certain securities and first mortgage loans. FHLB debt matures as follows (in thousands): 2019 $ 40,264 2020 55,880 2021 44,971 2022 15,566 2023 24,437 $ 181,118 In the first quarter of 2017, the Company repaid an aggregate of $34.0 million in advances from the FHLB and recorded $638,000 in long-term debt prepayment fees. Long-term Securities Sold Under Agreements to Repurchase At December 31, 2018 , Lakeland had no long-term securities sold under agreements to repurchase compared to $20.0 million at December 31, 2017 . In the second quarter of 2018, the Company repaid all of its $20.0 million in matured long-term securities sold under agreements to repurchase. These borrowings were collateralized by certain securities. The borrowings had a weighted average interest rate of 2.25% on December 31, 2017 . In the first quarter of 2017, the Company repaid an aggregate of $20.0 million in long-term securities sold under agreements to repurchase and recorded $2.2 million in long-term debt prepayment fees. The above FHLB debt and long-term securities sold under agreements to repurchase are collateralized by certain securities. At times the market value of securities collateralizing our borrowings may decline due to changes in interest rates and may necessitate our lenders to issue a “margin call” which requires Lakeland to pledge additional securities to meet that margin call. As of December 31, 2018 , the Company had $57.7 million in mortgage-backed securities pledged for its short-term securities sold under agreements to repurchase. Subordinated Debentures On September 30, 2016 , the Company completed an offering of $75.0 million of fixed to floating rate subordinated notes due September 30, 2026 . The notes will bear interest at a rate of 5.125% per annum until September 30, 2021 and will then reset quarterly to the then current three-month LIBOR plus 397 basis points until maturity in September 30, 2026 , or their earlier redemption. The debt is included in Tier 2 capital for the Company. Debt issuance costs totaled $1.5 million and are being amortized to maturity. Subordinated debt is presented net of issuance costs on the consolidated balance sheet. In May 2007 , the Company issued $20.6 million of junior subordinated debentures due August 31, 2037 to Lakeland Bancorp Capital Trust IV, a Delaware business trust. The distribution rate on these securities was 6.61% for 5 years and floats at LIBOR plus 152 basis points thereafter. The debentures are the sole asset of the Trust. The Trust issued 20,000 shares of trust preferred securities, $1,000 face value, for total proceeds of $20.0 million . The Company’s obligations under the debentures and related documents, taken together, constitute a full, irrevocable and unconditional guarantee on a subordinated basis by the Company of the Trust’s obligations under the preferred securities. The preferred securities are callable by the Company on or after August 1, 2012, or earlier if the deduction of related interest for federal income taxes is prohibited, treatment as Tier I capital is no longer permitted, or certain other contingencies arise. The preferred securities must be redeemed upon maturity of the debentures in 2037 . On August 3, 2015 , the Company acquired and extinguished $10.0 million of Lakeland Bancorp Capital Trust IV debentures and recorded a $1.8 million gain on the extinguishment of debt. In June 2003 , the Company issued $20.6 million of junior subordinated debentures due June 30, 2033 to Lakeland Bancorp Capital Trust II, a Delaware business trust. The distribution rate on these securities was 5.71% for 5 years and floats at LIBOR plus 310 basis points thereafter. The debentures are the sole asset of the Trust. The Trust issued 20,000 shares of trust preferred securities, $1,000 face value, for total proceeds of $20.0 million . The Company’s obligations under the debentures and related documents, taken together, constitute a full, irrevocable and unconditional guarantee on a subordinated basis by the Company of the Trust’s obligations under the preferred securities. The preferred securities are callable by the Company on or after June 30, 2008, or earlier if the deduction of related interest for federal income taxes is prohibited, treatment as Tier I capital is no longer permitted, or certain other contingencies arise. The preferred securities must be redeemed upon maturity of the debentures in 2033 . In June 2016 , the Company entered into two cash flow swaps totaling $30.0 million in order to hedge the variable cash outflows associated with the junior subordinated debentures issued to Lakeland Capital Trust II and Lakeland Capital Trust IV. For more information please see Note 19 – Derivatives.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITY On December 14, 2016, the Company successfully completed an at-the-market common stock issuance. A total of 2,739,650 shares of the Company’s common stock were sold at a weighted average price of $18.25 , representing gross proceeds to the Company of approximately $50.0 million . Net proceeds from the transaction, after the sales commission and other expenses, were approximately $48.7 million . On July 1, 2016, the Company completed its acquisition of Harmony Bank, a bank located in Ocean County, New Jersey. Lakeland Bancorp issued an aggregate of 3,201,109 shares of its common stock in the merger. Outstanding Harmony stock options were paid out in cash at the difference between $14.31 (Lakeland’s closing stock price on July 1, 2016 of $11.45 multiplied by 1.25 ) and the average strike price of $9.07 for a total cash payment of $869,000 . On January 7, 2016, the Company completed its acquisition of Pascack Bancorp, Inc. (“Pascack”), a bank holding company headquartered in Waldwick, New Jersey. Lakeland Bancorp issued 3,314,284 shares of its common stock in the merger and paid approximately $4.5 million in cash, including the cash paid in connection with the cancellation of Pascack stock options. Outstanding Pascack stock options were paid out in cash at the difference between $11.35 and an average strike price of $7.37 for a total cash payment of $122,000 .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The components of income taxes are as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Current tax provision $ 30,459 $ 10,565 $ 22,308 Deferred tax expense (benefit) (13,571 ) 16,904 (987 ) Total provision for income taxes $ 16,888 $ 27,469 $ 21,321 In July 2018, the State of New Jersey enacted changes to the tax law that were retroactive to the beginning of 2018. Included in these changes was a surcharge in addition to the corporate tax. The surcharge will be 2.5% for 2018 and 2019, 1.5% for 2020 and 2021, and will revert to no surcharge in 2022. In addition to the surcharge, New Jersey adopted the concept of combined (consolidated) tax filings under a unitary concept for corporations that are part of an affiliated group beginning in 2019. As of July 1, 2018, the Company revalued its deferred tax assets based on the additional surcharge and the combined tax filings. Based on this revaluation, the Company recorded an increase in its net deferred tax asset of $943,000 to reflect the change in the state tax rates among its subsidiaries. The Tax Cuts and Jobs Act was enacted on December 22, 2017, resulting in changes in the U.S. corporate tax rates, business-related exclusions, deductions and credits. Enactment of the Tax Cuts and Jobs Act requires the Company to reflect the changes associated with the law's provisions in its consolidated financial statements as of and for the year ended December 31, 2017. The Company recorded an increase in its net deferred tax asset of $1.3 million to reflect the reduction in the federal corporate income tax rate from 35% to 21%. During 2017, the Company implemented a tax planning strategy which resulted in an increase in deferred tax liabilities, a higher deferred tax provision and a $1.9 million excise tax recorded through current tax expense. Consequently, as a result of the Tax Cuts and Jobs Act being passed and the effect of the tax planning strategy, the net impact on the financial statements was $602,000 in additional tax expense. The income tax provision reconciled to the income taxes that would have been computed at the statutory federal rate of 21% for 2018 and 35% for both 2017 and 2016 is as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Federal income tax, at statutory rates $ 16,861 $ 28,017 $ 21,994 Increase (deduction) in taxes resulting from: Tax-exempt income (1,096 ) (1,652 ) (1,671 ) Excise tax on real estate investment trust ("REIT") dividend — 1,945 — Adjustment to net deferred tax asset for Tax Cuts and Jobs Act — (1,343 ) — State income tax, net of federal income tax effect 1,880 931 552 Adjustment to net deferred tax asset for change in NJ tax law (943 ) — — Excess tax benefits from employee share-based payments (318 ) (587 ) — Other, net 504 158 446 Provision for income taxes $ 16,888 $ 27,469 $ 21,321 The net deferred tax asset consisted of the following: December 31, 2018 2017 Deferred tax assets: (in thousands) Allowance for loan and lease losses $ 11,651 $ 10,662 Stock based compensation plans 865 769 Purchase accounting fair market value adjustments 1,192 1,441 Non-accrued interest 256 394 Deferred compensation 2,142 2,007 Depreciation and amortization 630 805 Other-than-temporary impairment loss on investment securities 59 77 Unrealized losses on securities available for sale 3,162 1,108 Other, net 585 675 Gross deferred tax assets 20,542 17,938 Deferred tax liabilities: Core deposit intangible from acquired companies 516 664 Undistributed income from subsidiary not consolidated for tax return purposes (REIT) 149 12,015 Deferred loan costs 1,418 1,169 Prepaid expenses 459 524 Deferred gain on securities 166 116 Unfunded pension benefits 17 7 Loss on equity securities 36 — Unrealized gains on hedging derivative 322 229 Other 270 357 Gross deferred tax liabilities 3,353 15,081 Net deferred tax assets $ 17,189 $ 2,857 The Company evaluates the realizability of its deferred tax assets by examining its earnings history and projected future earnings and by assessing whether it is more likely than not that carryforwards would not be realized. Based upon the majority of the Company’s deferred tax assets having no expiration date, the Company’s earnings history, and the projections of future earnings, the Company’s management believes that it is more likely than not that all of the Company’s deferred tax assets as of December 31, 2018 will be realized. The Company evaluates tax positions that may be uncertain using a recognition threshold of more likely than not, and a measurement attribute for all tax positions taken or expected to be taken on a tax return, in order for those tax positions to be recognized in the financial statements. The Company had no unrecognized tax benefits or related interest or penalties at December 31, 2018 or 2017 . The Company is subject to U.S. federal income tax law as well as income tax of various state jurisdictions. Tax regulations within each jurisdiction are subject to the interpretation of the related tax laws and regulations and require significant judgment to apply. With few significant exceptions, the Company is no longer subject to U.S. federal examinations by tax authorities for the years before 2016 or to state and local examinations by tax authorities for the years before 2015 .

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS Profit Sharing Plan The Company has a profit sharing plan for all its eligible employees. The Company’s discretionary annual contribution to the plan is determined by its Board of Directors. Annual contributions are allocated to participants on a point basis with accumulated benefits payable at retirement, or, at the discretion of the plan committee, upon termination of employment. There were no contributions made by the Company in 2018 or 2017 , while contributions made by the Company totaled $600,000 for the year ended 2016 . Benefit Obligations from Somerset Hills Acquisition Somerset Hills, acquired by the Company in 2013, entered into a non-qualified Supplemental Executive Retirement Plan (“SERP”) with its former Chief Executive Officer and its Chief Financial Officer which entitles them to a benefit of $48,000 and $24,000 , respectively, per year for 15 years after the earlier of retirement or death. The former Chief Executive Officer and the beneficiary of the Chief Financial Officer are currently being paid out under the plan. As of December 31, 2018 and 2017 , the Company had a liability of $629,000 and $702,000 , respectively, for these SERPs and recognized an expense of $(1,000) , $33,000 and $0 in 2018 , 2017 and 2016 , respectively. 401(k) plan The Company has a 401(k) plan covering substantially all employees providing they meet eligibility requirements. The Company matches 50% of the first 6% contributed by the participants to the 401(k) plan. The Company’s contributions in 2018 , 2017 and 2016 totaled $1.1 million , $1.0 million and $911,000 , respectively. Supplemental Executive Retirement Plans In December 2003 , the Company entered into a SERP agreement with its former CEO that provides annual retirement benefits of $150,000 a year for a 15 year period when the former CEO reached the age of 65 . Our former CEO retired and is receiving annual retirement benefits pursuant to the plan. In 2008 , the Company entered into a SERP agreement with its current CEO that provides annual retirement benefits of $150,000 for a 15 year period when the CEO reaches the age of 65 . In November 2008 , the Company entered into a SERP with a Regional President that provides annual retirement benefits of $90,000 a year for a 10 year period upon his reaching the age of 65 . In December 2016 , the Company entered into a SERP with a former Regional President that provides $84,500 a year for a 15 year period upon his reaching the age of 66 . The Company intends to fund its obligations under the deferred compensation arrangements with the increase in cash surrender value of bank owned life insurance policies. In 2018 , 2017 and 2016 , the Company recorded compensation expense of $83,000 , $261,000 and $746,000 , respectively, for these plans. The accrued liability for these plans was $3.3 million and $3.5 million for the years ended December 31, 2018 and 2017 , respectively. Deferred Compensation Agreement In February 2015 , the Company entered into a Deferred Compensation Agreement with its CEO where it would contribute $16,500 monthly into a deferral account which would earn interest at an annual rate of the Company’s prior year return on equity, provided that the Company’s return on equity remained in a range of 0% to 15% . The Company has agreed to make such contributions each month that the CEO is actively employed from February 2015 through December 31, 2022. The expense incurred in 2018 , 2017 and 2016 was $269,000 , $244,000 and $222,000 , respectively, and the accrued liability at December 31, 2018 and 2017 was $923,000 and $654,000 , respectively. Following the CEO’s normal retirement date, he shall be paid out in 180 consecutive monthly installments. Elective Deferral Plan In March 2015 , the Company established an Elective Deferral Plan for eligible executives in which the executive may elect to contribute a portion of his base salary and bonus to a deferral account which will earn an interest rate of 75% of the Company’s prior year return on equity provided that the return on equity remains in the range of 0% to 15% . The Company recorded an expense of $73,000 , $55,000 and $22,000 in 2018 , 2017 and 2016 , respectively, and had a liability recorded of $1.4 million and $916,000 at December 31, 2018 and 2017 , respectively.

Directors Retirement Plan

Directors Retirement Plan	12 Months Ended
	Dec. 31, 2018
Retirement Benefits, Description [Abstract]
Directors Retirement Plan	DIRECTORS RETIREMENT PLAN The Company provides a retirement plan that directors appointed to the board prior to 2009 who completed five years of service may retire and receive benefit payments ranging from $5,000 through $17,500 per annum, depending upon years of credited service, for a period of ten years. This plan is unfunded. The following tables present the status of the plan and the components of net periodic plan cost for the years then ended. The measurement date for the accumulated benefit obligation is December 31 of the years presented. December 31, 2018 2017 (in thousands) Accrued plan cost included in other liabilities $ 604 $ 673 Amount not recognized as component of net postretirement benefit cost Recognized in accumulated other comprehensive income Net actuarial gain $ (29 ) $ 28 Unrecognized prior service cost — — Amounts not recognized as a component of net postretirement benefit (benefit) $ (29 ) $ 28 Years Ended December 31, 2018 2017 2016 (in thousands) Net periodic plan cost included the following components: Service cost $ 15 $ 21 $ 19 Interest cost 20 23 26 Amortization of prior service cost — 3 12 $ 35 $ 47 $ 57 A discount rate of 3.97% , 3.30% and 3.68% was assumed in the plan valuation for 2018 , 2017 and 2016 , respectively. As the benefit amount is not dependent upon compensation levels, a rate of increase in compensation assumption was not utilized in the plan valuation. The directors' retirement plan holds no plan assets. The benefits expected to be paid in each of the next five years and in aggregate for the five years thereafter are as follows (in thousands): 2019 $ 57 2020 63 2021 37 2022 38 2023 38 2024-2028 235 The Company expects its contribution to the directors' retirement plan to be $57,000 in 2019 . There is no expected amount to be recognized in accumulated other comprehensive income as a component of net periodic benefit cost in 2019 .

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	STOCK-BASED COMPENSATION Employee Stock Option Plans The Company's shareholders approved the 2018 Omnibus Equity Incentive Plan (the "Plan"), which authorizes the granting of incentive stock options, supplemental stock options, stock appreciation rights, restricted shares, restricted stock units, other stock-based awards and cash-based awards to officers, employees and non-employee directors of, and consultants and advisors to, the Company and its subsidiaries. The Plan authorizes the issuance of up to 2.0 million shares of Company common stock and includes approximately 1.1 million shares of common stock theretofore available under the Company's 2009 Equity Compensation Program but not used. The maximum term of the Company’s stock option grants under the Plan is ten years from the date of grant. Under the 2009 Equity Compensation Program, 2.3 million shares of common stock of the Company were authorized. The maximum term of the Company’s stock option grants under this plan was ten years from the date of grant. In 2014, the Company began issuing restricted stock units ("RSUs"), some of which have performance conditions attached to them. No further awards may be granted from the 2009 program. The Company has outstanding stock options issued to its directors as well as options assumed under the Somerset Hills’ stock option plans at the time of the Company's acquisition of Somerset Hills. As of December 31, 2018 and 2017 , respectively, 55,192 and 81,442 options granted to directors were outstanding. As of December 31, 2018 and 2017 , there were 12,296 and 20,774 options outstanding, respectively, under the Somerset Hills’ stock option plans. Excess tax benefits of stock based compensation were $318,000 , $587,000 and $43,000 for the years 2018 , 2017 and 2016 , respectively. A summary of the status of the Company’s option plans as of December 31, 2018 and the changes during the year ending on that date is represented below. Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Outstanding, beginning of year 102,216 $ 8.49 4.27 $ 1,101,806 Granted — — Exercised (34,728 ) 8.84 Expired — — Forfeited — — Outstanding, end of year 67,488 $ 8.28 2.86 $ 440,483 Options exercisable at year-end 67,488 $ 8.28 2.86 $ 440,483 There were no non-vested options under the Company’s option plans as of December 31, 2018 and no changes to the non-vested options for the year then ended. As of December 31, 2018 , there was no unrecognized compensation expense related to unvested stock options under the 2018 Omnibus Equity Incentive Plan or the 2009 Equity Compensation Program. Compensation expense recognized for stock options was $0 , $14,000 and $35,000 for 2018 , 2017 and 2016 , respectively. The aggregate intrinsic values of options exercised in 2018 and 2017 were $406,000 and $337,000 , respectively. Exercise of stock options during 2018 and 2017 resulted in cash receipts of $307,000 and $321,000 , respectively. The total fair value of options that vested in 2018 and 2017 were $0 and $35,000 , respectively. Information regarding the Company’s restricted stock for the year ended December 31, 2018 is as follows: Number of Shares Weighted Average Price Outstanding, Balance at of January 1, 2018 22,982 $ 14.44 Granted 11,575 20.30 Vested (22,856 ) 14.46 Outstanding, December 31, 2018 11,701 $ 20.18 In 2018 , the Company granted 11,575 shares of restricted stock to non-employee directors at a grant date fair value of $20.30 per share under the Company’s 2018 Omnibus Equity Incentive Plan and 2009 Equity Compensation Program. These shares will vest over a one year period, totaling $235,000 in compensation expense. In 2017 , the Company granted 13,176 shares of restricted stock to non-employee directors at a grant date fair value of $18.20 per share under the Company’s 2009 Equity Compensation Program. These shares vested over a one year period, totaling $240,000 in compensation expense. In 2016 , the Company granted 23,952 shares of restricted stock to non-employee directors at a grant date fair value of $10.02 per share under the Company’s 2009 Equity Compensation Program. These shares vested over a one year period, totaling $240,000 in compensation expense. The total fair value of the restricted stock vested during the year ended December 31, 2018 was approximately $331,000 . Compensation expense recognized for restricted stock was $237,000 , $287,000 and $353,000 in 2018 , 2017 and 2016 , respectively. There was approximately $3,000 in unrecognized compensation expense related to restricted stock grants as of December 31, 2018 , which is expected to be recognized over a period of 0.05 years. In 2018 , the Company granted 159,233 RSUs at a weighted average grant date fair value of $19.09 per share under the Company’s 2018 Omnibus Equity Incentive Plan and 2009 Equity Compensation Program. These units vest within a range of two to three years. A portion of these RSUs will vest subject to certain performance conditions in the restricted stock unit agreements. There are also certain provisions in the compensation program which state that if a holder of the RSUs reaches a certain age and years of service, the person has effectively earned a portion of the RSUs at that time. Compensation expense on the RSUs granted in 2018 is expected to average approximately $1.0 million per year over a three year period. In 2017 , the Company granted 132,523 RSUs at a weighted average grant date fair value of $19.92 per share under the Company’s 2009 Equity Compensation Program. These units vest within a range of two to three years. Compensation expense on these restricted stock units is expected to average approximately $880,000 per year over a three year period. In 2016 , the Company granted 180,926 RSUs at a weighted average grant date fair value of $10.45 per share under the Company’s 2009 Equity Compensation Program. Compensation expense on these restricted stock units is expected to average $630,000 per year over a three year period. Compensation expense for restricted stock units totaled $2.2 million , $2.0 million and $1.5 million in 2018 , 2017 and 2016 , respectively. There was approximately $2.5 million in unrecognized compensation expense related to restricted stock units as of December 31, 2018 , which is expected to be recognized over a period of 1.20 years. Information regarding the Company’s RSUs and changes during the year ended December 31, 2018 is as follows: Number of RSUs Weighted Average Price Outstanding, Balance at of January 1, 2018 267,732 $ 13.93 Granted 159,233 19.09 Vested (119,421 ) 13.76 Forfeited (8,197 ) 18.99 Outstanding, December 31, 2018 299,347 $ 16.60

Revenue Recognition (Notes)

Revenue Recognition (Notes)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	REVENUE RECOGNITION The Company’s primary source of revenue is interest income generated from loans, leases and investment securities. Interest income is recognized according to the terms of the financial instrument agreement over the life of the loan, lease or investment security unless it is determined that the counterparty is unable to continue making interest payments. Interest income also includes prepaid interest fees from commercial customers, which approximates the interest foregone on the balance of the loan prepaid. The Company’s additional source of income, also referred to as noninterest income, is generated from deposit related fees, interchange fees, loan and lease fees, merchant fees, loan sales and other miscellaneous income and is largely based on contracts with customers. In these cases, the Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. The Company considers a customer to be any party to which the Company will provide goods or services that are an output of the Company’s ordinary activities in exchange for consideration. There is little seasonality with regards to revenue from contracts with customers and all inter-company revenue is eliminated when the Company’s financial statements are consolidated. Generally, the Company enters into contracts with customers that are short-term in nature where the performance obligations are fulfilled and payment is processed at the same time. Such examples include revenue related to merchant fees, interchange fees and investment services income. In addition, revenue generated from existing customer relationships such as deposit accounts are also considered short-term in nature, because the relationship may be terminated at any time and payment is processed at the time performance obligations are fulfilled. As a result, the Company does not have contract assets, contract liabilities or related receivable accounts for contracts with customers. In cases where collectability is a concern, the Company does not record revenue. Generally, the pricing of transactions between the Company and each customer is either (i) established within a legally enforceable contract between the two parties, as is the case with the loan sales, or (ii) disclosed to the customer at a specific point in time, as is the case when a deposit account is opened or before a new loan is underwritten. Fees are usually fixed at a specific amount or as a percentage of a transaction amount. No judgment or estimates by management are required to record revenue related to these transactions and pricing is clearly identified within these contracts. The Company primarily operates in one geographic region, Northern and Central New Jersey and contiguous areas. Therefore, all significant operating decisions are based upon analysis of the Company as one operating segment or unit. We disaggregate our revenue from contracts with customers by contract-type and timing of revenue recognition, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Noninterest income not generated from customers during the Company’s ordinary activities primarily relates to mortgage servicing rights, gains/losses on the sale of investment securities, gains/losses on the sale of other real estate owned, gains/losses on the sale of property, plant and equipment, and income from bank owned life insurance. The following table sets forth the components of noninterest income for the years ended December 31, 2018 , 2017 and 2016 : 2018 2017 2016 (in thousands) Deposit Related Fees and Charges Debit card interchange income $ 5,150 $ 4,474 $ 4,086 Overdraft charges 3,938 4,656 4,763 ATM service charges 830 808 705 Demand deposit fees and charges 540 679 546 Savings service charges 126 123 57 Total 10,584 10,740 10,157 Commissions and Fees Loan and lease fees 1,264 1,136 1,198 Wire transfer charges 1,093 1,005 914 Investment services income 1,314 1,045 973 Merchant fees 784 718 444 Commissions from sales of checks 434 457 448 Safe deposit income 371 269 247 Other income 264 202 96 Total 5,524 4,832 4,320 Gains on Sale of Loans 1,329 1,836 2,123 Other Income Gains on customer swap transactions 1,992 982 1,056 Title insurance income 195 200 142 Other income 295 518 431 Total 2,482 1,700 1,629 Revenue not from contracts with customers 2,391 6,327 3,101 Total Noninterest Income $ 22,310 $ 25,435 $ 21,330 Timing of Revenue Recognition Products and services transferred at a point in time $ 19,844 $ 19,040 $ 18,192 Products and services transferred over time 75 68 37 Revenue not from contracts with customers 2,391 6,327 3,101 Total Noninterest Income $ 22,310 $ 25,435 $ 21,330

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Lease Obligations Lakeland is obligated under various non-cancelable operating leases on building and land used for office space and banking purposes. These leases contain renewal options and escalation clauses. Rent expense under long-term operating leases amounted to approximately $3.0 million , $3.1 million and $3.2 million for the years ended December 31, 2018 , 2017 and 2016 , respectively, including rent expense to related parties of $144,000 in 2018 , $144,000 in 2017 , and $141,000 in 2016 . At December 31, 2018 , the minimum commitments under all noncancellable leases with remaining terms of more than one year and expiring through 2033 are as follows (in thousands): Year 2019 $ 3,191 2020 3,055 2021 2,866 2022 2,572 2023 2,233 Thereafter 14,642 $ 28,559 Litigation There are no pending legal proceedings involving the Company or Lakeland other than those arising in the normal course of business. Management does not anticipate that the potential liability, if any, arising out of such legal proceedings will have a material effect on the financial condition or results of operations of the Company and Lakeland on a consolidated basis.

Financial Instruments with Off-

Financial Instruments with Off-Balance-Sheet Risk and Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Financial Instruments with Off-Balance-Sheet Risk and Concentrations of Credit Risk	FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK AND CONCENTRATIONS OF CREDIT RISK Lakeland is party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the consolidated financial statements when they become payable. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets. The contract or notional amounts of those instruments reflect the extent of involvement Lakeland has in particular classes of financial instruments. Lakeland’s exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit and standby letters of credit is represented by the contractual or notional amount of those instruments. Lakeland uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments. Lakeland generally requires collateral or other security to support financial instruments with credit risk. The approximate contract amounts are as follows: December 31, 2018 2017 (in thousands) Financial instruments whose contract amounts represent credit risk Commitments to extend credit $ 973,709 $ 966,441 Standby letters of credit and financial guarantees written 21,585 14,832 At December 31, 2018 and 2017 there were $808,000 and $20,000 , respectively, in commitments to lend additional funds to borrowers whose terms have been modified in troubled debt restructurings. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Lakeland evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by Lakeland upon extension of credit, is based on management’s credit evaluation. Standby letters of credit are conditional commitments issued by Lakeland to guarantee the payment by or performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. Lakeland holds deposit accounts, residential or commercial real estate, accounts receivable, inventory and equipment as collateral to support those commitments for which collateral is deemed necessary. The extent of collateral held for those commitments at December 31, 2018 and 2017 varies based on management’s credit evaluation. Lakeland issues financial and performance letters of credit. Financial letters of credit require Lakeland to make payment if the customer fails to make payment, as defined in the agreements. Performance letters of credit require Lakeland to make payments if the customer fails to perform certain non-financial contractual obligations. Lakeland defines the initial fair value of these letters of credit as the fees received from the customer. Lakeland records these fees as a liability when issuing the letters of credit and amortizes the fee over the life of the letter of credit. The maximum potential undiscounted amount of future payments of these letters of credit as of December 31, 2018 was $21.6 million and they expire through 2024 . Lakeland’s exposure under these letters of credit would be reduced by actual performance, subsequent termination by the beneficiaries and by any proceeds that Lakeland obtained in liquidating the collateral for the loans, which varies depending on the customer. As of December 31, 2018 , Lakeland had $973.7 million in loan and lease commitments, with $667.9 million maturing within one year, $135.5 million maturing after one year but within three years, $19.1 million maturing after three years but within five years, and $151.2 million maturing after five years. As of December 31, 2018 , Lakeland had $21.6 million in standby letters of credit, with $21.1 million maturing within one year, $444,000 maturing after one year but within three years, $0 maturing after three years but within five years and $80,000 maturing after five years. Lakeland grants loans primarily to customers in New Jersey, the Hudson Valley Region in New York State, and surrounding areas. Certain of Lakeland’s consumer loans and lease customers are more diversified nationally. Although Lakeland has a diversified loan portfolio, a large portion of its loans are secured by commercial or residential real property. Although Lakeland has a diversified loan portfolio, a substantial portion of its debtors’ ability to honor their contracts is dependent upon the economy. Commercial and standby letters of credit were granted primarily to commercial borrowers.

Comprehensive Income (Loss)

Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Comprehensive Income (Loss)	COMPREHENSIVE INCOME (LOSS) The Company reports comprehensive income (loss) in addition to net income (loss) from operations. Comprehensive income is a more inclusive financial reporting methodology that includes disclosure of certain financial information that historically has not been recognized in the calculation of net income. The following table shows the changes in the balances of each of the components of other comprehensive income for the periods presented. Year Ended December 31, 2018 Before Tax Amount Tax Benefit (Expense) Net of Tax Amount (in thousands) Unrealized losses on securities available for sale Unrealized holding losses arising during period $ (4,241 ) $ 734 $ (3,507 ) Reclassification adjustment for securities gains included in net income — — — Net unrealized losses on securities available for sale (4,241 ) 734 (3,507 ) Unrealized gains on derivatives 9 32 41 Change in pension liability, net 29 (9 ) 20 Other comprehensive loss $ (4,203 ) $ 757 $ (3,446 ) Year Ended December 31, 2017 Before Tax Amount Tax Benefit (Expense) Net of Tax Amount (in thousands) Unrealized losses on securities available for sale Unrealized holding losses arising during period $ (1,406 ) $ 503 $ (903 ) Reclassification adjustment for securities gains included in net income (2,524 ) 884 (1,640 ) Net unrealized losses on securities available for sale (3,930 ) 1,387 (2,543 ) Unrealized gains on derivatives 57 (20 ) 37 Change in pension liability, net (27 ) 11 (16 ) Other comprehensive loss $ (3,900 ) $ 1,378 $ (2,522 ) Year Ended December 31, 2016 Before Tax Amount Tax Benefit (Expense) Net of Tax Amount (in thousands) Unrealized losses on securities available for sale Unrealized holding losses arising during period $ (1,816 ) $ 778 $ (1,038 ) Reclassification adjustment for securities gains included in net income (370 ) 137 (233 ) Net unrealized losses on available for sale securities (2,186 ) 915 (1,271 ) Unrealized gains on derivatives 1,033 (361 ) 672 Change in pension liability, net 70 (28 ) 42 Other comprehensive loss $ (1,083 ) $ 526 $ (557 ) Unrealized Gains (Losses) on Available- for-Sale Securities Unrealized Gains (Losses) on Derivatives Pension Items Total (in thousands, net of tax) Balance at of January 1, 2016 $ 1,154 $ — $ (4 ) $ 1,150 Other comprehensive income (loss) before classifications (1,038 ) 672 42 (324 ) Amounts reclassified from accumulated other comprehensive income (233 ) $ — — (233 ) Net current period other comprehensive income (loss) (1,271 ) 672 42 $ (557 ) Balance at December 31, 2016 $ (117 ) $ 672 $ 38 $ 593 Other comprehensive income (loss) before classifications (903 ) 37 (16 ) (882 ) Amounts reclassified from accumulated other comprehensive income (1,640 ) — — (1,640 ) Net current period other comprehensive income (loss) (2,543 ) 37 (16 ) (2,522 ) Adjustment for implementation of ASU 2018-02 (572 ) 153 (1 ) (420 ) Balance at December 31, 2017 $ (3,232 ) $ 862 $ 21 $ (2,349 ) Adjustment for implementation of ASU 2016-01 (2,043 ) — — (2,043 ) Adjusted balance as of January 1, 2018 (5,275 ) 862 21 (4,392 ) Other comprehensive income (loss) before classifications (3,507 ) 41 20 (3,446 ) Amounts reclassified from accumulated other comprehensive income — — — — Net current period other comprehensive income (loss) (3,507 ) 41 20 (3,446 ) Balance at December 31, 2018 $ (8,782 ) $ 903 $ 41 $ (7,838 )

Fair Value Measurement and Fair

Fair Value Measurement and Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement and Fair Value of Financial Instruments	FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Measurement Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market for an asset or liability in an orderly transaction between market participants at the measurement date. U.S. GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels giving the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest level priority to unobservable inputs (level 3 measurements). The following describes the three levels of fair value hierarchy: Level 1 - unadjusted quoted prices in active markets for identical assets or liabilities; includes U.S. Treasury Notes, and other U.S. Government Agency securities that actively trade in over-the-counter markets; equity securities and mutual funds that actively trade in over-the-counter markets. Level 2 - quoted prices for similar assets or liabilities in active markets; or quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs other than quoted prices that are observable for the asset or liability including yield curves, volatilities, and prepayment speeds. Level 3 - unobservable inputs for the asset or liability that reflect the Company’s own assumptions about assumptions that market participants would use in the pricing of the asset or liability and that are consequently not based on market activity but on particular valuation techniques. The Company’s assets that are measured at fair value on a recurring basis are its available for sale investment securities and its interest rate swaps. The Company obtains fair values on its securities using information from a third party servicer. If quoted prices for securities are available in an active market, those securities are classified as Level 1 securities. The Company has U.S. Treasury Notes and certain equity securities that are classified as Level 1 securities. Level 2 securities were primarily comprised of U.S. Agency bonds, residential mortgage-backed securities, obligations of state and political subdivisions and corporate securities. Fair values were estimated primarily by obtaining quoted prices for similar assets in active markets or through the use of pricing models supported with market data information. Standard inputs include benchmark yields, reported trades, broker-dealer quotes, issuer spreads, bids and offers. On a quarterly basis, the Company reviews the pricing information received from the Company’s third party pricing service. This review includes a comparison to non-binding third-party quotes. The fair values of derivatives are based on valuation models using current market terms (including interest rates and fees), the remaining terms of the agreements and the credit worthiness of the counter-party as of the measurement date (Level 2). The following table sets forth the Company’s financial assets that were accounted for at fair value on a recurring basis as of the periods presented by level within the fair value hierarchy. During the years ended December 31, 2018 and 2017 , the Company did not make any transfers between recurring Level 1 fair value measurements and recurring Level 2 fair value measurements. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value (in thousands) Assets: Investment securities, available for sale U.S. Treasury and government agencies $ 4,920 $ 136,007 $ — $ 140,927 Mortgage-backed securities — 447,094 — 447,094 Obligations of states and political subdivisions — 45,505 — 45,505 Corporate debt securities — 5,092 — 5,092 Total securities available for sale 4,920 633,698 — 638,618 Equity securities, at fair value 2,731 13,190 — 15,921 Derivative assets — 12,135 — 12,135 Total Assets $ 7,651 $ 659,023 $ — $ 666,674 Liabilities: Derivative liabilities $ — $ 11,036 $ — $ 11,036 Total Liabilities $ — $ 11,036 $ — $ 11,036 December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value (in thousands) Assets: Investment securities, available for sale U.S. Treasury and government agencies $ 5,415 $ 141,840 $ — $ 147,255 Mortgage-backed securities — 424,331 — 424,331 Obligations of states and political subdivisions — 51,320 — 51,320 Corporate debt securities — 5,140 — 5,140 Total securities available for sale 5,415 622,631 — 628,046 Equity securities, at fair value 5,147 12,942 — 18,089 Derivative assets — 6,555 — 6,555 Total Assets $ 10,562 $ 642,128 $ — $ 652,690 Liabilities: Derivative liabilities $ — $ 5,465 $ — $ 5,465 Total Liabilities $ — $ 5,465 $ — $ 5,465 The following table sets forth the Company’s financial assets subject to fair value adjustments (impairment) on a non-recurring basis. Assets are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: December 31, 2018 (Level 1) (Level 2) (Level 3) Total Fair Value (in thousands) Assets: Impaired loans and leases $ — $ — $ 19,702 $ 19,702 Loans held for sale — 1,113 — 1,113 Other real estate owned and other repossessed assets — — 830 830 December 31, 2017 (Level 1) (Level 2) (Level 3) Total Fair Value (in thousands) Assets: Impaired loans and leases $ — $ — $ 22,591 $ 22,591 Loans held for sale — 456 — 456 Other real estate owned and other repossessed assets — — 843 843 Impaired loans and leases are evaluated and valued at the time the loan is identified as impaired at the lower of cost or market value. Because most of Lakeland’s impaired loans are collateral dependent, fair value is generally measured based on the value of the collateral, less estimated costs to sell, securing these loans and leases and is classified at a level 3 in the fair value hierarchy. Collateral may be real estate, accounts receivable, inventory, equipment and/or other business assets. The value of the real estate is assessed based on appraisals by qualified third party licensed appraisers. The appraisers may use the income approach to value the collateral using discount rates (with ranges of 5 - 11% ) or capitalization rates (with ranges of 4 - 9% ) to evaluate the property. The value of the equipment may be determined by an appraiser, if significant, inquiry through a recognized valuation resource, or by the value on the borrower’s financial statements. Field examiner reviews on business assets may be conducted based on the loan exposure and reliance on this type of collateral. Appraised and reported values may be discounted based on management’s historical knowledge, changes in market conditions from the time of valuation, and/or management’s expertise and knowledge of the client and client’s business. Impaired loans and leases are reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted accordingly, based on the same factors identified above. The Company has a held for sale loan portfolio that consists of residential mortgages that are being sold in the secondary market. The Company records these mortgages at the lower of cost or fair market value. Fair value is generally determined by the value of purchase commitments. Other real estate owned (OREO) and other repossessed assets, representing property acquired through foreclosure or deed in lieu of foreclosure, are carried at fair value less estimated disposal costs of the acquired property. Fair value on other real estate owned is based on the appraised value of the collateral using discount rates or capitalization rates similar to those used in impaired loan valuation. The fair value of other repossessed assets is estimated by inquiry through a recognized valuation resource. Changes in the assumptions or methodologies used to estimate fair values may materially affect the estimated amounts. Changes in economic conditions, locally or nationally, could impact the value of the estimated amounts of impaired loans, OREO and other repossessed assets. Fair Value of Certain Financial Instruments Estimated fair values have been determined by the Company using the best available data and an estimation methodology suitable for each category of financial instruments. Management is concerned that there may not be reasonable comparability between institutions due to the wide range of permitted assumptions and methodologies in the absence of active markets. This lack of uniformity gives rise to a high degree of subjectivity in estimating financial instrument fair values. The estimation methodologies used, the estimated fair values, and recorded book balances at December 31, 2018 and December 31, 2017 are outlined below. This summary, as well as the table below, excludes financial assets and liabilities for which carrying value approximates fair value. For financial assets, these include cash and cash equivalents. For financial liabilities, these include noninterest-bearing demand deposits, savings and interest-bearing transaction accounts and federal funds sold and securities sold under agreements to repurchase. The estimated fair value of demand, savings and interest-bearing transaction accounts is the amount payable on demand at the reporting date. Carrying value is used because there is no stated maturity on these accounts, and the customer has the ability to withdraw the funds immediately. Also excluded from this summary and the following table are those financial instruments recorded at fair value on a recurring basis, as previously described. The fair value of investment securities held to maturity was measured using information from the same third-party servicer used for investment securities available for sale using the same methodologies discussed above. Investment securities held to maturity includes $6.0 million in short-term municipal bond anticipation notes and $1.0 million in subordinated debt that are non-rated and do not have an active secondary market or information readily available on standard financial systems. As a result, the securities are classified as Level 3 securities. Management performs a credit analysis before investing in these securities. FHLB stock is an equity interest that can be sold to the issuing FHLB, to other FHLBs, or to other member banks at its par value. Because ownership of these securities is restricted, they do not have a readily determinable fair value. As such, the Company’s FHLB stock is recorded at cost or par value and is evaluated for impairment each reporting period by considering the ultimate recoverability of the investment rather than temporary declines in value. The Company’s evaluation primarily includes an evaluation of liquidity, capitalization, operating performance, commitments, and regulatory or legislative events. The net loan portfolio at December 31, 2018 has been valued using an exit price approach, which incorporates a build-up discount rate calculation that uses a swap rate adjusted for credit risk, servicing costs, a liquidity premium and a prepayment premium. This is not comparable with the fair values used for December 31, 2017, which are based on entrance prices. For December 31, 2017 , the loan portfolio was valued using a present value discounted cash flow where market prices are not available. The discount rate used in these calculations is the estimated current market rate adjusted for credit risk. For fixed maturity certificates of deposit, fair value was estimated based on the present value of discounted cash flows using the rates currently offered for deposits of similar remaining maturities. The carrying amount of accrued interest payable approximates its fair value. The fair value of long-term debt is based upon the discounted value of contractual cash flows. The Company estimates the discount rate using the rates currently offered for similar borrowing arrangements. The fair value of subordinated debentures is based on bid/ask prices from brokers for similar types of instruments. The fair values of commitments to extend credit and standby letters of credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed-rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value of guarantees and letters of credit is based on fees currently charged for similar agreements or on the estimated cost to terminate them or otherwise settle the obligations with the counterparties at the reporting date. The fair values of commitments to extend credit and standby letters of credit are deemed immaterial. The following table presents the carrying values, fair values and placement in the fair value hierarchy of the Company’s financial instruments as of December 31, 2018 and December 31, 2017 : December 31, 2018 Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Financial Assets: Investment securities held to maturity $ 153,646 $ 150,932 $ — $ 143,913 $ 7,019 Federal Home Loan and other membership bank stock 13,301 13,301 — 13,301 — Loans and leases, net 4,419,045 4,341,477 — — 4,341,477 Financial Liabilities: Certificates of deposit 757,038 750,801 — 750,801 — Other borrowings 181,118 176,921 — 176,921 — Subordinated debentures 105,027 102,497 — — 102,497 December 31, 2017 Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Financial Assets: Investment securities held to maturity $ 139,685 $ 138,688 $ — $ 127,901 $ 10,787 Federal Home Loan and other membership bank stock 12,576 12,576 — 12,576 — Loans and leases, net 4,117,265 4,114,516 — — 4,114,516 Financial Liabilities: Certificates of deposit 737,428 732,417 — 732,417 — Other borrowings 192,011 189,080 — 189,080 — Subordinated debentures 104,902 97,244 — — 97,244

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	DERIVATIVES Lakeland is a party to interest rate derivatives that are not designated as hedging instruments. Under a program, Lakeland executes interest rate swaps with commercial lending customers to facilitate their respective risk management strategies. These interest rate swaps with customers are simultaneously offset by interest rate swaps that Lakeland executes with a third party, such that Lakeland minimizes its net risk exposure resulting from such transactions. Because the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. The changes in the fair value of the swaps offset each other, except for the credit risk of the counterparties, which is determined by taking into consideration the risk rating, probability of default and loss given default for all counterparties. As of December 31, 2018 and 2017 , Lakeland had $498,000 and $500,000 , respectively, in securities pledged for collateral on its interest rate swaps. In June 2016, the Company entered into two cash flow hedges in order to hedge the variable cash outflows associated with its floating rate subordinated debentures (See Note 8). The notional value of these hedges was $30.0 million . The Company’s objective in using the cash flow hedge is to add stability to interest expense and to manage its exposure to interest rate movements. The Company used interest rate swaps designated as cash flow hedges which involved the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. In these particular hedges the Company is paying a third party an average of 1.10% in exchange for a payment at 3 month LIBOR . The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges are recorded in accumulated other comprehensive income and are subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During the year ended December 31, 2018 , the Company did not record any hedge ineffectiveness. The Company recognized $329,000 of accumulated other comprehensive income that was reclassified into interest expense during 2018 . The Company did not enter into any hedges in 2018 . Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Company’s debt. During the next twelve months, the Company estimates that $509,000 will be reclassified as a decrease to interest expense should the rate environment remain the same. The following table presents summary information regarding these derivatives for the periods presented (dollars in thousands): December 31, 2018 Notional Amount Average Maturity (Years) Weighted Average Rate Fixed Weighted Average Variable Rate Fair Value Classified in Other Assets: 3rd Party interest rate swaps $ 153,909 8.3 4.10 % 1 Mo. LIBOR + 2.13% $ 5,329 Customer interest rate swaps 164,427 12.0 5.04 % 1 Mo. LIBOR + 2.05% 5,707 Interest rate swap (cash flow hedge) 30,000 2.5 1.10 % 3 Mo. LIBOR 1,099 Classified in Other Liabilities: Customer interest rate swaps $ 153,909 8.3 4.10 % 1 Mo. LIBOR + 2.13% $ (5,329 ) 3rd party interest rate swaps 164,427 12.0 5.04 % 1 Mo. LIBOR + 2.05% (5,707 ) December 31, 2017 Notional Amount Average Maturity (Years) Weighted Average Rate Fixed Weighted Average Variable Rate Fair Value Classified in Other Assets: 3rd Party interest rate swaps $ 110,076 8.8 3.87 % 1 Mo. LIBOR + 2.11% $ 3,634 Customer interest rate swaps 82,760 11.5 4.74 % 1 Mo. LIBOR + 2.21% 1,831 Interest rate swap (cash flow hedge) 30,000 3.5 1.10 % 3 Mo. LIBOR 1,090 Classified in Other Liabilities: Customer interest rate swaps $ 110,076 8.8 3.87 % 1 Mo. LIBOR + 2.11% $ (3,634 ) 3rd party interest rate swaps 82,760 11.5 4.74 % 1 Mo. LIBOR + 2.21% (1,831 )

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Regulatory Matters	REGULATORY MATTERS The Bank Holding Company Act of 1956 restricts the amount of dividends the Company can pay. Accordingly, dividends should generally only be paid out of current earnings, as defined. The New Jersey Banking Act of 1948 restricts the amount of dividends paid on the capital stock of New Jersey chartered banks. Accordingly, no dividends shall be paid by such banks on their capital stock unless, following the payment of such dividends, the capital stock of Lakeland will be unimpaired, and: (1) Lakeland will have a surplus, as defined, of not less than 50% of its capital stock, or, if not, (2) the payment of such dividend will not reduce the surplus, as defined, of Lakeland. Under these limitations, approximately $544.1 million was available for payment of dividends from Lakeland to the Company as of December 31, 2018 . The Company and Lakeland are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory – and possible additional discretionary – actions by regulators that, if undertaken, could have a direct material effect on the Company’s and Lakeland’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 and Lakeland’s assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The Company’s and Lakeland’s capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Quantitative measures established by regulations to ensure capital adequacy require the Company and Lakeland to maintain minimum amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets, and of Tier 1 capital to average assets. Management believes, as of December 31, 2018 , that the Company and Lakeland met all capital adequacy requirements to which they are subject. As of December 31, 2018 , the most recent notification from the FDIC categorized Lakeland as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, Lakeland must maintain minimum total risk-based, Tier 1 risk-based, common equity Tier 1 capital and Tier 1 leverage ratios as set forth in the table below. There are no conditions or events since that notification that management believes have changed the institution’s category. As of December 31, 2018 and 2017 , the Company and Lakeland have the following capital ratios based on the then current regulations: Actual For Capital Adequacy Purposes with Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions December 31, 2018 Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total capital (to risk-weighted assets) Company $ 637,377 13.71 % > $ 458,952 > 9.875% N/A N/A Lakeland 605,560 13.06 % $ 457,912 9.875 % > $ 463,708 > 10.00% Tier 1 capital (to risk-weighted assets) Company $ 523,577 11.27 % > $ 366,000 > 7.875% N/A N/A Lakeland 565,549 12.20 % $ 365,170 7.875 % > $ 370,967 > 8.00% Common equity Tier 1 capital (to risk-weighted assets) Company $ 493,577 10.62 % > $ 296,285 > 6.375% N/A N/A Lakeland 565,549 12.20 % $ 295,614 6.375 % > $ 301,410 > 6.50% Tier 1 capital (to average assets) Company $ 523,577 9.39 % > $ 222,982 > 4.00% N/A N/A Lakeland 565,549 10.17 % $ 222,539 4.00 % > $ 278,173 > 5.00% Actual For Capital Adequacy Purposes with Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions December 31, 2017 Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total capital (to risk-weighted assets) Company $ 589,047 13.40 % > $ 406,477 > 9.25% N/A N/A Lakeland 563,910 12.86 % $ 405,552 9.25 % > $ 438,435 > 10.00% Tier 1 capital (to risk-weighted assets) Company $ 477,453 10.87 % > $ 318,590 > 7.25% N/A N/A Lakeland 525,979 12.00 % $ 317,865 7.25 % > $ 350,748 > 8.00% Common equity Tier 1 capital (to risk-weighted assets) Company $ 447,453 10.18 % > $ 252,675 > 5.75% N/A N/A Lakeland 525,979 12.00 % $ 252,100 5.75 % > $ 284,983 > 6.50% Tier 1 capital (to average assets) Company $ 477,453 9.12 % > $ 209,431 > 4.00% N/A N/A Lakeland 525,979 10.06 % $ 209,239 4.00 % > $ 261,548 > 5.00% The final rules implementing the Basel Committee on Banking Supervisions capital guidelines for U.S. Banks became effective for the Company on January 1, 2015, with full compliance with all the final rule’s requirements phased in over a multi-year schedule, to be fully phased in by January 1, 2019. The Basel Rules require a “capital conservation buffer.” The implementation of the capital conservation buffer began on January 1, 2016 at the 0.625% level and increases by 0.625% every January 1 until it reached 2.5% on January 1, 2019.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	GOODWILL AND OTHER INTANGIBLE ASSETS The Company reported goodwill of $136.4 million at both December 31, 2018 and December 31, 2017 . Core deposit intangible was $1.8 million on December 31, 2018 compared to $2.4 million on December 31, 2017 . The Company recorded $691,000 , $1.5 million and $2.7 million in core deposit intangible for the Harmony, Pascack and Somerset Hills acquisitions, respectively. In 2018 , it has amortized $594,000 in core deposit intangible. The estimated future amortization expense for each of the succeeding five years ended December 31 is as follows (in thousands): For the Year Ended 2019 $ 505 2020 415 2021 326 2022 236 2023 147

Condensed Financial Information

Condensed Financial Information - Parent Company Only	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information - Parent Company Only	CONDENSED FINANCIAL INFORMATION - PARENT COMPANY ONLY CONDENSED BALANCE SHEETS December 31, 2018 2017 (in thousands) ASSETS Cash and due from banks $ 23,285 $ 17,695 Equity securities 2,743 5,158 Investment securities, held to maturity 1,000 1,000 Investment in subsidiaries 695,571 659,180 Other assets 7,182 6,013 TOTAL ASSETS $ 729,781 $ 689,046 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 1,015 $ 1,022 Subordinated debentures 105,027 104,902 Total stockholders’ equity 623,739 583,122 TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY $ 729,781 $ 689,046 CONDENSED STATEMENTS OF INCOME Years Ended December 31, 2018 2017 2016 (in thousands) INCOME Dividends from subsidiaries $ 30,589 $ 26,665 $ 20,687 Other income (125 ) 2,750 199 TOTAL INCOME 30,464 29,415 20,886 EXPENSE Interest on subordinated debentures 5,141 5,091 2,171 Noninterest expenses 506 377 442 TOTAL EXPENSE 5,647 5,468 2,613 Income before (benefit) provision for income taxes 24,817 23,947 18,273 Income taxes (benefit) provision (1,130 ) (2,018 ) (845 ) Income before equity in undistributed income of subsidiaries 25,947 25,965 19,118 Equity in undistributed income of subsidiaries 37,454 26,615 22,400 NET INCOME AVAILABLE TO COMMON SHAREHOLDERS $ 63,401 $ 52,580 $ 41,518 CONDENSED STATEMENTS OF CASH FLOWS Years Ended December 31, 2018 2017 2016 (in thousands) CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 63,401 $ 52,580 $ 41,518 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Gain on securities — (2,539 ) — Amortization of subordinated debt costs 125 118 30 Change in market value of equity securities 338 — — Excess tax benefits 318 587 — Increase in other assets (1,446 ) (1,927 ) (922 ) (Decrease) increase in other liabilities (6 ) (17 ) 1,010 Equity in undistributed income of subsidiaries (37,454 ) (26,615 ) (22,400 ) NET CASH PROVIDED BY OPERATING ACTIVITIES 25,276 22,187 19,236 CASH FLOWS FROM INVESTING ACTIVITIES Net cash used in acquisition — — (5,356 ) Purchases of available for sale securities — (79 ) (62 ) Purchases of equity securities (78 ) — — Proceeds from sale of available for sale securities — 3,217 — Proceeds from sale of equity securities 2,155 — — Contribution to subsidiary — — (124,373 ) NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES 2,077 3,138 (129,791 ) CASH FLOWS FROM FINANCING ACTIVITIES Cash dividends paid on common stock (21,307 ) (18,853 ) (16,007 ) Proceeds from issuance of common stock, net — — 48,678 Proceeds from issuance of subordinated debt, net — — 73,516 Retirement of restricted stock (763 ) (773 ) (206 ) Excess tax benefits — — 43 Exercise of stock options 307 321 285 NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES (21,763 ) (19,305 ) 106,309 Net increase (decrease) in cash and cash equivalents 5,590 6,020 (4,246 ) Cash and cash equivalents, beginning of year 17,695 11,675 15,921 CASH AND CASH EQUIVALENTS, END OF YEAR $ 23,285 $ 17,695 $ 11,675

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation The accounting and reporting policies of the Company and its subsidiaries conform with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and predominant practices within the banking industry. The consolidated financial statements include the accounts of the Company, Lakeland, Lakeland NJ Investment Corp., Lakeland Investment Corp., Lakeland Equity, Inc. and Lakeland Preferred Equity, Inc. All significant intercompany balances and transactions have been eliminated in consolidation. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications. The preparation of financial statements 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. These estimates and assumptions also affect reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. The principal estimates that are particularly susceptible to significant change in the near term relate to the allowance for loan and lease losses and the valuation of the Company’s investment securities portfolio. The policies regarding these estimates are discussed below. The Company’s operating segments are components of its enterprise for which separate financial information is available and is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The Company’s chief operating decision maker is its Chief Executive Officer. All of the Company’s financial services activities are interrelated, and each activity is dependent and assessed based on how each of the activities of the Company supports the others. For example, commercial lending is dependent upon the ability of Lakeland to fund itself with retail deposits and other borrowings and to manage interest rate and credit risk. The situation is also similar for consumer and residential mortgage lending. Moreover, the Company primarily operates in one market area, Northern and Central New Jersey and contiguous areas. Therefore, all significant operating decisions are based upon analysis of the Company as one operating segment or unit. Accordingly, the Company has determined that it has one operating segment and thus one reporting segment.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents are defined as cash on hand, cash items in the process of collection, amounts due from banks and federal funds sold with an original maturity of three months or less. A portion of Lakeland’s cash on hand and on deposit with the Federal Reserve Bank was required to meet regulatory reserve and clearing requirements.
Investment Securities	Investment Securities Investment securities are classified as held to maturity or available for sale. Management determines the appropriate classification of investment securities at the time of purchase. Investments in securities, for which management has both the ability and intent to hold to maturity, are classified as held to maturity and carried at cost, adjusted for the amortization of premiums and accretion of discounts computed by the effective interest method. Investments in debt securities, which management believes may be sold prior to maturity due to changes in interest rates, prepayment risk, liquidity requirements, or other factors, are classified as available for sale. Net unrealized gains and losses for such securities, net of tax effect, are reported as other comprehensive income (loss) and excluded from the determination of net income. Gains or losses on disposition of investment securities are based on the net proceeds and the adjusted carrying amount of the securities sold using the specific identification method. Losses are recorded through the statement of income when the impairment is considered other-than-temporary, even if a decision to sell has not been made. The Company evaluates its investment securities portfolio for impairment each quarter. In estimating other-than-temporary losses, the Company considers the length of time and the extent to which the fair value has been less than cost, the financial condition and near-term prospects of the issuer, and whether the Company is more likely than not to sell the security before recovery of its cost basis. If a security has been impaired for more than twelve months, and the impairment is deemed other-than-temporary, a write down will occur in that quarter. If a loss is deemed to be other-than-temporary, it is recognized as a realized loss in the income statement with the security assigned a new cost basis. If the Company intends to sell an impaired security, the Company records an other-than-temporary loss in an amount equal to the entire difference between the fair value and amortized cost. If a security is determined to be other-than-temporarily impaired, but the Company does not intend to sell the security, only the credit portion of the estimated loss is recognized in earnings in gain (loss) on securities, with the other portion of the loss recognized in other comprehensive income. If a determination is made that an equity security is other-than-temporarily impaired, the unrealized loss will be recognized as an other-than-temporary impairment charge in noninterest income as a component of gain (loss) on investment securities.
Loans and Leases and Allowance for Loan and Lease Losses	Loans and Leases and Allowance for Loan and Lease Losses Loans and leases that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are stated at the amount of unpaid principal and are net of unearned discount, unearned loan fees and an allowance for loan and lease losses. Interest income is accrued as earned on a simple interest basis, adjusted for prepayments. All unamortized fees and costs related to the loan are amortized over the life of the loan using the interest method. Accrual of interest is discontinued on a loan or lease when management believes, after considering economic and business conditions and collection efforts, that the borrower’s financial condition is such that full collection of interest and principal is doubtful. When a loan or lease is placed on such non-accrual status, all accumulated accrued interest receivable is reversed out of current period income. Commercial loans and leases are placed on a non-accrual status with all accrued interest and unpaid interest reversed if (a) because of the deterioration in the financial position of the borrowers they are maintained on a cash basis (which means payments are applied when and as received rather than on a regularly scheduled basis), (b) payment in full of interest or principal is not expected, or (c) principal and interest have been in default for a period of 90 days or more unless the obligation is both well-secured and in process of collection. Residential mortgage loans and closed-end consumer loans are placed on non-accrual status at the time principal and interest have been in default for a period of 90 days or more, except where there exists sufficient collateral to cover the defaulted principal and interest payments, and the loans are well-secured and in the process of collection. Open-end consumer loans secured by real estate are generally placed on non-accrual and reviewed for charge-off when principal and interest payments are four months in arrears unless the obligations are well-secured and in the process of collection. Interest thereafter on such charged-off loans is taken into income when received only after full recovery of principal. As a general rule, a non-accrual asset may be restored to accrual status when none of its principal or interest is due and unpaid, satisfactory payments have been received for a sustained period (usually six months), or when it otherwise becomes well-secured and in the process of collection. The Company defines impaired loans as all non-accrual loans with recorded investments of $500,000 or greater. Impaired loans also include all loans modified as troubled debt restructurings. Loans and leases are considered impaired when, based on current information and events, it is probable that Lakeland will be unable to collect all amounts due in accordance with the original contractual terms of the loan agreement, including scheduled principal and interest payments. Impairment is measured based on the present value of expected cash flows discounted at the loan’s effective interest rate, or as a practical expedient, Lakeland may measure impairment based on a loan’s observable market price, or the fair value of the collateral, less estimated costs to sell, if the loan is collateral-dependent. Regardless of the measurement method, Lakeland measures impairment based on the fair value of the collateral when it is determined that foreclosure is probable. Most of Lakeland’s impaired loans are collateral-dependent. Shortfalls in collateral or cash flows are charged-off or specifically reserved for in the period the short-fall is identified. Charge-offs are recommended by the Chief Credit Officer and approved by the Board. Lakeland groups impaired commercial loans under $500,000 into homogeneous pools and collectively evaluates them. Interest received on impaired loans and leases may be recorded as interest income. However, if management is not reasonably certain that an impaired loan and lease will be repaid in full, or if a specific time frame to resolve full collection cannot yet be reasonably determined, all payments received are recorded as reductions of principal. Purchased Credit-Impaired (“PCI”) loans are loans acquired through acquisition or purchased at a discount that is due, in part, to credit quality. PCI loans are accounted for in accordance with ASC Subtopic 310-30 and are initially recorded at fair value (as determined by the present value of expected future cash flows) with no valuation allowance (i.e., the allowance for loan losses). The difference between the undiscounted cash flows expected at acquisition and the initial carrying amount (fair value) of the covered loans, or the “accretable yield,” is recognized as interest income utilizing the level-yield method over the life of the loans. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment, as a loss accrual or a valuation allowance. Reclassifications of the non-accretable difference to the accretable yield may occur subsequent to the loan acquisition dates due to increases in expected cash flows of the loans and results in an increase in yield on a prospective basis. Subsequent to acquisition date, further credit deterioration of a PCI loan will result in a valuation allowance recognized in the allowance for loan and lease losses. Loans are classified as troubled debt restructured loans ("TDRs") in cases where borrowers experience financial difficulties and Lakeland makes certain concessionary modifications to contractual terms. Restructured loans typically involve a modification of terms such as a reduction of the stated interest rate, an extended moratorium of principal payments and/or an extension of the maturity date at a stated interest rate lower than the current market rate for a new loan with similar risk. Nonetheless, restructured loans are classified as impaired loans. If a loan has been restructured, it will continue to be classified as a TDR until it is fully repaid or until it meets all of the following criteria: 1) the borrower is no longer experiencing financial difficulties, 2) the rate is not less than the rate provided for similar credit risk, 3) other terms are no less favorable than similar new debt and 4) no concessions were granted. The allowance for loan and lease losses is the estimated amount considered necessary to cover probable and reasonably estimable incurred losses inherent in the loan portfolio at the balance sheet date. In determining the allowance, we make significant estimates and judgments, and, therefore, have identified the allowance as a critical accounting policy. The allowance is established through a provision for loan and lease losses charged against income. Loan principal considered to be uncollectible by management is charged against the allowance. The allowance for loan and lease losses has been determined in accordance with U.S. GAAP. We are responsible for the timely and periodic determination of the amount of the allowance required. We believe that our allowance is adequate to cover identifiable losses, as well as estimated losses inherent in our portfolio for which certain losses are probable but not specifically identifiable. The determination of the adequacy of the allowance for loan and lease losses and the periodic provisioning for estimated losses included in the consolidated financial statements is the responsibility of management and the Board of Directors. Management performs a formal quarterly evaluation of the allowance for loan and lease losses. This quarterly process is performed by the credit administration department and approved by the Chief Credit Officer. All supporting documentation with regard to the evaluation process is maintained by the credit administration department. Each quarter, the evaluation along with the supporting documentation is reviewed by the finance department before approval by the Chief Credit Officer. The allowance evaluation is then presented to an Allowance for Loan and Lease Losses committee, which gives final approval to the allowance evaluation before being presented to the Board of Directors for their approval. Additionally, the Company continually evaluates, through its governance process, the development of the allowance for loan and lease losses methodology. During the third quarter of 2017, the Company refined and enhanced its quantitative framework by implementing loss migration periods to determine historical loss rates. It also enhanced its qualitative framework to complement the loss migration historical loss rates. These enhancements were implemented to increase the level of precision in the allowance for loan and lease losses and did not result in a material change in the required allowance for loan and lease losses. The methodology employed for assessing the adequacy of the allowance consists of the following criteria: • The establishment of specific reserve amounts for impaired loans and leases, including PCI loans. • The establishment of reserves for pools of homogeneous loans and leases not subject to specific review, including impaired loans under $500,000, leases, 1 - 4 family residential mortgages, and consumer loans. The establishment of reserve amounts for pools of homogeneous loans and leases are based upon the determination of historical loss rates, which are adjusted to reflect current conditions through the use of qualitative factors. The qualitative factors considered by the Company includes an evaluation of the results of the Company’s independent loan review function, the Company's reporting capabilities, the adequacy and expertise of Lakeland’s lending staff, underwriting policies, loss histories, trends in the portfolio, delinquency trends, economic and business conditions and capitalization rates. Since many of Lakeland’s loans depend on the sufficiency of collateral as a secondary source of repayment, any adverse trends in the real estate market could affect the underlying values available to protect Lakeland from losses. Additionally, management determines the loss emergence periods for each loan segment, which are used to define loss migration periods and establish appropriate ranges for qualitative adjustments for each loan segment. The loss emergence period is the estimated time from the date of a loss event (such as a personal bankruptcy) to the actual recognition of the loss (typically via the first partial or full loan charge-off), and is determined based upon a study of our past loss experience by loan segment. All of the factors considered in the analysis of the adequacy of the allowance for loan and lease losses may be subject to change. To the extent actual outcomes differ from management estimates, additional provisions for loan and lease losses may be required that would adversely impact earnings in future periods. A loan that management designates as impaired is reviewed for charge-off when it is placed on non-accrual status with a resulting charge-off if the loan is not secured by collateral having sufficient liquidation value to repay the loan if the loan is collateral dependent or charged off if deemed uncollectible. For a loan that is not collateral dependent, a reserve may be established for any shortfall in expected cash flows. Charge-offs are recommended by the Chief Credit Officer and approved by the Board. Loans Held for Sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or estimated fair value. Gains and losses on sales of loans are specifically identified and accounted for in accordance with U.S. GAAP which requires that an entity engaged in mortgage banking activities classify the retained mortgage-backed security or other interest, which resulted from the securitization of a mortgage loan held for sale, based upon its ability and intent to sell or hold these investments.
Bank Premises and Equipment	Premises and Equipment, Net Premises and equipment, including leasehold improvements, are stated at cost less accumulated depreciation. Depreciation expense is computed on the straight-line method over the estimated useful lives of the assets. Leasehold improvements are depreciated over the shorter of the estimated useful lives of the improvements or the terms of the related leases.
Other Real Estate Owned and Other Repossessed Assets	Other Real Estate Owned and Other Repossessed Assets Other real estate owned (OREO) and other repossessed assets, representing property acquired through foreclosure (or deed-in-lieu-of-foreclosure), are carried at fair value less estimated disposal costs of the acquired property. Costs relating to holding the assets are charged to expense. An allowance for OREO or other repossessed assets is established, through charges to expense, to maintain properties at fair value less estimated costs to sell. Operating results of OREO and other repossessed assets, including rental income and operating expenses, are included in other expenses.
Mortgage Servicing	Mortgage Servicing Lakeland performs various servicing functions on loans owned by others. A fee, usually based on a percentage of the outstanding principal balance of the loan, is received for these services. At December 31, 2018 and 2017 , Lakeland was servicing approximately $19.9 million and $23.0 million , respectively, of loans for others. Lakeland originates certain mortgages under a definitive plan to sell or securitize those loans and service the loans owned by the investor. Upon the transfer of the mortgage loans in a sale or a securitization, Lakeland records the servicing assets retained. Lakeland records mortgage servicing rights and the loans based on relative fair values at the date of origination and evaluates the mortgage servicing rights for impairment at each reporting period. Lakeland also originates loans that it sells to other banks and investors and does not retain the servicing rights.
Mortgage Servicing Rights	Mortgage Servicing Rights When mortgage loans are sold with servicing retained, servicing rights are initially recorded at fair value with the income statement effect recorded in gains on sales of loans. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans. As of December 31, 2018 and 2017 , Lakeland had originated mortgage servicing rights of $68,000 and $88,000 , respectively. Under the amortization measurement method, Lakeland subsequently measures servicing rights at fair value at each reporting date and records any impairment in value of servicing assets in earnings in the period in which the impairment occurs. The fair values of servicing rights are subject to fluctuations as a result of changes in estimated and actual prepayment speeds and default rates and losses. Servicing fee income, which is reported on the income statement as commissions and fees, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan, and are recorded as income when earned.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, put presumptively beyond the reach of the transferor and its creditors even in bankruptcy or other receivership, (2) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets.
Derivatives	Derivatives Lakeland enters into interest rate swaps (“swaps”) with loan customers to provide a facility to mitigate the fluctuations in the variable rate on the respective loans. These swaps are matched in offsetting terms to swaps that Lakeland enters into with an outside third party. The swaps are reported at fair value in other assets or other liabilities. Lakeland’s swaps qualify as derivatives, but are not designated as hedging instruments, thus any net gain or loss resulting from changes in the fair value is recognized in other noninterest income. The credit risk associated with derivatives executed with customers is similar as that involved in extending loans and is subject to normal credit policies. Collateral is obtained based on management’s assessment of the customer. The positions of customer derivatives are recorded at fair value and changes in value are included in noninterest income on the consolidated statement of income. Cash flow hedges are used primarily to minimize the variability in cash flows of assets or liabilities, or forecasted transactions caused by interest rate fluctuations. Changes in the fair value of derivatives designated as cash flow hedges are recorded in accumulated other comprehensive income and are reclassified into the line item in the income statement in which the hedged item is recorded in the same period the hedged item affects earnings. Hedge ineffectiveness and gains and losses on the component of a derivative excluded in assessing hedge effectiveness are recorded in the same income statement line item. Further discussion of Lakeland’s financial derivatives is set forth in Note 19 to the Consolidated Financial Statements.
Earnings Per Share	Earnings Per Share Earnings per share is calculated on the basis of the weighted average number of common shares outstanding during the year. Basic earnings per share excludes dilution and is computed by dividing income available to common shareholders by the weighted average common shares outstanding during the period. Diluted earnings per share takes into account the potential dilution that could occur if securities or other contracts to issue common stock were exercised and converted into common stock.
Employee Benefit Plans	Employee Benefit Plans The Company has certain employee benefit plans covering substantially all employees. The Company accrues such costs as incurred. We recognize the overfunded or underfunded status of pension and postretirement benefit plans in accordance with U.S. GAAP. Actuarial gains and losses, prior service costs or credits, and any remaining transition assets or obligations are recognized as a component of Accumulated Other Comprehensive Income, net of tax effects, until they are amortized as a component of net periodic benefit cost.
Comprehensive Income (Loss)	Comprehensive Income (Loss) The Company reports comprehensive income (loss) in addition to net income from operations. Other comprehensive income (loss) includes items recorded directly in equity such as unrealized gains or losses on securities available for sale as well as unrealized gains (losses) recorded on derivatives and benefit plans.
Goodwill and Other Identifiable Intangible Assets	Goodwill and Other Identifiable Intangible Assets Goodwill is presumed to have an indefinite useful life and is tested, at least annually, for impairment at the reporting unit level. Impairment exists when the carrying amount of goodwill exceeds its implied fair value. For purposes of our goodwill impairment testing, we have identified a single reporting unit, community banking. U.S. GAAP permits an entity to make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test. The Company completed its annual qualitative assessment as of November 30, 2018 and concluded that there was less than a 50% probability that the fair value of the reporting unit is less than its carrying amount and, therefore, the two-step goodwill impairment test was not required.
Bank Owned Life Insurance	Bank Owned Life Insurance Lakeland invests in bank owned life insurance (“BOLI”). BOLI involves the purchasing of life insurance by Lakeland on a chosen group of employees. Lakeland is the owner and beneficiary of the policies. At December 31, 2018 and 2017 , Lakeland had $110.1 million and $107.5 million , respectively, in BOLI. Income earned on BOLI was $3.3 million , $2.4 million and $2.6 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. BOLI is accounted for using the cash surrender value method and is recorded at its net realizable value.
Deferred Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method of accounting for income taxes. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities as measured by the enacted tax rates that will be in effect when these differences reverse. Deferred tax expense is the result of changes in deferred tax assets and liabilities. The principal types of differences between assets and liabilities for financial statement and tax return purposes are allowance for loan and lease losses, core deposit intangibles, deferred loan fees and deferred compensation.
Variable Interest Entities	Variable Interest Entities Management has determined that Lakeland Bancorp Capital Trust II and Lakeland Bancorp Capital Trust IV (collectively, “the Trusts”) qualify as variable interest entities. The Trusts issued mandatorily redeemable preferred stock to investors and loaned the proceeds to the Company. The Trusts hold, as their sole asset, subordinated debentures issued by the Company. The Company is not considered the primary beneficiary of the Trusts, therefore the Trusts are not consolidated in the Company’s financial statements. The Company’s maximum exposure to the Trusts is $30.0 million at December 31, 2018 which is the Company’s liability to the Trusts and includes the Company’s investment in the Trusts. The Federal Reserve has issued guidance on the regulatory capital treatment for the trust preferred securities issued by the Trusts. The rule retains the current maximum percentage of total capital permitted for trust preferred securities at 25% , but enacts other changes to the rules governing trust preferred securities that affect their use as part of the collection of entities known as “restricted core capital elements.” The rule allows bank holding companies to continue to count trust preferred securities as Tier 1 Capital. The Company’s capital ratios continue to be categorized as “well-capitalized” under the regulatory framework for prompt corrective action. Under the Collins Amendment to the Dodd-Frank Wall Street Reform and Consumer Protection Act, any new issuance of trust preferred securities by the Company would not be eligible as regulatory capital.
New Accounting Pronouncements	New Accounting Pronouncements In August 2018, the Financial Accounting Standards Board ("FASB") issued an update to improve the effectiveness of fair value measurement disclosures. Among other provisions, the update removes requirements to disclose amounts and reasons of transfers between Level 1 and Level 2 in the fair value hierarchy, and it modifies the disclosures regarding transfers in and out of Level 3 of the fair value hierarchy. The update requires a discussion regarding the change in unrealized gains and losses included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period, and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. This update will be effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2019. Because the Company does not typically have Level 3 fair value measurements, the update is expected to have an insignificant impact on the Company's financial statements. In August 2018, the FASB issued an update which aligns the requirements for capitalizing implementation costs in a cloud-computing arrangement service contract with the requirements for capitalizing implementation costs incurred for an internal-use software license. Implementation costs incurred by customers in a cloud computing arrangement are to be deferred and recognized over the term of the arrangement, if those costs would be capitalized by the customer in a software licensing arrangement under the internal-use software guidance. This update will be effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2019. The Company is currently assessing the impact that the guidance will have on its financial statements. In August 2018, the FASB issued an update which changes the disclosure of accounting and reporting requirements related to single-employer defined benefit pension or other postretirement benefit plans. The amendments in the update remove disclosures that are no longer considered cost-beneficial, clarify the specific requirements of disclosures and add disclosure requirements identified as relevant. For calendar-year public companies, the changes will be effective for annual periods, including interim periods within those annual periods, in 2020. Because the Company has minimal pension plan provisions that require calculation of projected benefit obligations or accumulated benefit obligations, the update is expected to have an insignificant impact on the Company's financial statements. In June 2018, the FASB issued an update expanding earlier guidance on stock compensation to include share-based payments issued to nonemployees for goods and services. Consequently, the accounting for share-based payments to nonemployees and employees will be substantially the same. This update will be effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2018. Earlier adoption is permitted. The adoption of this update had an insignificant impact on the Company's financial statements. In March 2018, the FASB issued an update regarding the accounting implications of the Tax Cuts and Jobs Act (the "Tax Act"). The update clarifies that in a company's financial statements that include the reporting period in which the Tax Act was enacted, a company must first reflect the income tax effects of the Tax Act in which the accounting under U.S. GAAP is complete. Those amounts would not be provisional amounts. The company would also report provisional amounts for those specific income tax effects for which the accounting under U.S. GAAP will be incomplete but for which a reasonable estimate can be determined. If there are income tax effects for the Tax Act for which a reasonable estimate cannot be determined, the company would not report provisional amounts and would continue to apply U.S. GAAP based on the tax laws that were in effect immediately prior to the Tax Act being enacted. This accounting update is effective immediately. The Company believes its accounting for the income tax effects of the Tax Act is complete. Technical corrections or other forthcoming guidance could change how we interpret provisions of the Tax Act, which may impact our effective tax rate and could affect our deferred tax assets, tax positions and/or our tax liabilities. In February 2018, the FASB issued an update regarding the reclassification of certain tax effects from accumulated other comprehensive income. This update requires a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the newly enacted federal corporate tax rate. The amount of the reclassification would be the difference between the historical 35% corporate income tax rate and the newly enacted 21% corporate tax rate. This update eliminates the stranded tax effects associated with the change in the federal corporate income tax rate in the Tax Act and improves the usefulness of information reported to financial statement users. The amendments are effective for all entities for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption of the amendments is permitted including adoption in any interim period, for public business entities for reporting periods for which financial statements have not yet been issued and all other entities for reporting periods for which financial statements have not yet been made available for issuance. An entity may apply the amendments in the update retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Act is recognized. The Company elected to adopt this update in December 2017 and recorded a $420,000 increase to retained earnings and reduction to accumulated other comprehensive income. In August 2017, the FASB issued an update intended to improve and simplify accounting rules around hedge accounting. Amendments expand and refine hedge accounting for both nonfinancial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The amendments in this update also make certain targeted improvements to simplify the application of hedge accounting guidance and ease the administrative burden of hedge documentation requirements and assessing hedge effectiveness. In October 2018, the FASB issued an update to permit the use of the Overnight Index Swap ("OIS") rate based on the Secured Overnight Financing Rate ("SOFR") as a benchmark interest rate for hedge accounting purposes. These updates will be effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2018. The adoption of this update had an insignificant impact on the Company's financial statements. In July 2017, the FASB issued guidance which simplifies the accounting for certain financial instruments with down round features, a provision in an equity-linked financial instrument (or embedded feature) that provides a downward adjustment of the current exercise price based on the price of future equity offerings. The provisions of the new guidance related to down rounds are effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company has no equity-linked financial instruments that have such down round features, therefore the adoption of this update had an insignificant impact on the Company's financial statements. In May 2017, the FASB issued an update which provides clarity and reduces diversity in practice when accounting for the modification of terms and conditions for share-based payment awards. Previous accounting guidance did not distinguish between modifications which were substantive from modifications that were merely administrative. The accounting standards update requires entities to account for the effects of a modification unless the following three conditions are met: the fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified; the vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified; and the classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. This update is effective for annual and interim periods beginning after December 15, 2017. The adoption of this update had an insignificant impact on the Company’s financial statements. In March 2017, the FASB issued an update which shortens the amortization period for certain callable debt securities held at a premium to the earliest call date. Under current GAAP, entities amortize the premium as an adjustment of yield over the contractual life of the instrument even if the holder is certain that the call will be exercised. As a result, upon the exercise of a call on a callable debt security held at a premium, the unamortized premium is recorded as a loss in earnings. The update shortens the amortization period for certain callable debt securities held at a premium and requires the premium be amortized to the earliest call date. This update will be effective for annual and interim periods beginning after December 15, 2018. Entities are required to apply the amendments on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this update had an insignificant impact on the Company’s financial statements. In March 2017, the FASB issued an update which changes the presentation of net periodic pension cost and net periodic postretirement benefit cost in a company’s income statement. The amendment requires that an employer report the service cost component in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The amendment is effective for annual and interim periods beginning after December 15, 2017. Because the Company has minimal benefit plan provisions that require the measurement of net periodic pension cost and net periodic postretirement benefit cost, the adoption of this update had an insignificant impact on the Company’s financial statements. In January 2017, the FASB issued an update to simplify the test for goodwill impairment. This amendment eliminates Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value. This update will be effective for the Company’s financial statements for annual years beginning after December 15, 2019. The adoption of this update is expected to have an insignificant impact on the Company’s financial statements. In January 2017, the FASB issued an update that clarifies the definition of a business as it pertains to business combinations. This amendment affects all companies and other reporting organizations that must determine whether they have sold or acquired a business. This update is effective for the Company’s financial statements for fiscal years beginning after December 15, 2017. The adoption of this update had an insignificant impact on the Company’s financial statements. In September 2016, the FASB issued an accounting standards update to address diversity in presentation in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. This update is effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2017. The adoption of this update had an insignificant impact on the Company’s consolidated balance sheet or statement of income. In June 2016, the FASB issued an accounting standards update pertaining to the measurement of credit losses on financial instruments. This update requires the measurement of all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. This update is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. This update will be effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2019. The Company is currently evaluating its existing systems and data to support the new standard as well as assessing the impact that the guidance will have on the Company's consolidated financial statements. The Company has formed a working group under the direction of the Chief Risk Officer that is comprised of individuals from the credit, risk management, finance and project management areas for implementation of this update. In early 2018, the Company contracted with a software and advisory service provider to aid in implementation. The Company continues to work with this service provider in assessing its data and preparing for implementation. In November 2018, the FASB issued additional codification improvements which clarified that operating leases are not part of the credit losses standard, but rather, should be accounted for in accordance with the leases standard. In February 2016, FASB issued accounting guidance that requires all lessees to recognize a lease liability and a right-of-use asset, measured at the present value of the future minimum lease payments, at the lease commencement date. Lessor accounting remains largely unchanged under the new guidance. The guidance is effective for fiscal years beginning after December 15, 2018, including interim reporting periods within that reporting period, with early adoption permitted. A modified retrospective approach must be applied for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. In the third quarter of 2018, the FASB issued updates which included targeted improvements to the leasing guidance that is intended to reduce costs and ease implementation of the leases standard. The improvements include an optional transition method to adopt the new leases standard where the entity could initially apply the new leases standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption. Consequently, an entity's reporting for comparative periods presented in the financial statements in which it adopts the new leases standard, will continue to be in accordance with current GAAP in topic 840, Leases. An entity that adopts this additional transition method, must provide the required disclosures for all periods that continue to be in accordance with the current GAAP in Topic 840. The lease update also includes a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component and, instead, to account for these components as a single component if the nonlease components otherwise would be accounted for under the new revenue guidance and both of the following conditions are met: 1) the timing and pattern of transfer of the nonlease component(s) and associated lease component are the same, and 2) the lease component, if accounted for separately, would be classified as an operating lease. The Company is adopting the ASUs related to Leases as of January 1, 2019. The Company reviewed its existing lease contracts and service contracts that may include embedded leases. The Company retained the services of a software provider to aid in implementation with the oversight of management. Management identified the complete population of contracts that would be required to be assessed under this standard. Management has elected the transition practical expedient option, which allowed us not to reassess 1) whether any contracts are or contain embedded leases; 2) the lease classification for any leases; and 3) whether initial direct costs meet the new definition, as of the initial adoption date. From the lessee perspective, no embedded leases were identified and we will recognize upon adoption, a Right of Use ("ROU") asset and a lease liability primarily related to real estate leases existing on January 1, 2019. Management is in process of completing its assessment which includes assessment of the leases from the Highlands Bancorp. Inc. acquisition which occurred early in first quarter 2019. In January 2016, the FASB issued an accounting standards update intended to improve the recognition and measurement of financial instruments. Specifically, the accounting standards update requires all equity instruments, with the exception of those that are accounted for under the equity method of accounting, to be measured at fair value with changes in the fair value recognized through net income. Additionally, public business entities are required to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The amendments in this update also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In February 2018, the FASB issued further guidance that provided technical corrections to this update. Those technical corrections included clarification on accounting for equity securities without a readily determinable fair value, remeasurement requirements on forward contracts and purchased options, and presentation requirements for certain fair value option liabilities. This amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The adoption of this update required an adjustment on January 1, 2018 from other comprehensive income to retained earnings for the amount of the unrealized gain on equity securities as of December 31, 2017. Thereafter, any increases or decreases to the market value on these equity securities will be recorded through the consolidated statements of income. Please see the Consolidated Statement of Changes in Stockholders' Equity, Note 4 - Investment Securities and Note 17 - Comprehensive Income (Loss) for more information. In May 2014, the FASB issued an accounting standards update that clarifies the principles for recognizing revenue. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to a customer in an amount that reflects the consideration to which the entity expects to be entitled in exchange for these goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. In 2016, the FASB issued further implementation guidance regarding revenue recognition. This additional guidance included clarification on certain principal versus agent considerations within the implementation of the guidance as well as clarification related to identifying performance obligations and licensing. The guidance also requires new qualitative and quantitative disclosures, including disaggregation of revenues and descriptions of performance obligations. The guidance along with its updates is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. In evaluating this standard, management has determined that the majority of revenue earned by the Company is from revenue streams not included in the scope of this standard. The Company has assessed its revenue streams and reviewed contracts potentially affected by the guidance including deposit related fees, interchange fees, investment commissions, merchant fee income and other noninterest income sources to determine the potential impact the new guidance is expected to have on the Company’s consolidated financial statements. The Company adopted the guidance on January 1, 2018 using the modified retrospective method. The Company did not have a cumulative-effect adjustment to opening retained earnings as a result of adopting this standard. Please see Note 14 - Revenue Recognition for more information.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following tables present the computation of basic and diluted earnings per share for the periods presented. Year Ended December 31, 2018 Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share amounts) Basic earnings per share Net income available to common shareholders $ 63,401 47,578 $ 1.33 Less: earnings allocated to participating securities (582 ) — (0.01 ) Net income available to common shareholders $ 62,819 47,578 $ 1.32 Effect of dilutive securities Stock options and restricted stock — 188 — Diluted earnings per share Net income available to common shareholders plus assumed conversions $ 62,819 47,766 $ 1.32 Year Ended December 31, 2017 Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share amounts) Basic earnings per share Net income available to common shareholders $ 52,580 47,438 $ 1.11 Less: earnings allocated to participating securities (480 ) — (0.01 ) Net income available to common shareholders $ 52,100 47,438 $ 1.10 Effect of dilutive securities Stock options and restricted stock — 236 (0.01 ) Diluted earnings per share Net income available to common shareholders plus assumed conversions $ 52,100 47,674 $ 1.09 Year Ended December 31, 2016 Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share amounts) Basic earnings per share Net income available to common shareholders $ 41,518 42,912 $ 0.97 Less: earnings allocated to participating securities (396 ) — (0.01 ) Net income available to common shareholders $ 41,122 42,912 $ 0.96 Effect of dilutive securities Stock options and restricted stock — 202 (0.01 ) Diluted earnings per share Net income available to common shareholders plus assumed conversions $ 41,122 $ 43,114 $ 0.95

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Reconciliation of Available-for-Sale Securities	The amortized cost, gross unrealized gains and losses and the fair value of the Company’s available for sale and held to maturity investment securities are as follows: December 31, 2018 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) AVAILABLE FOR SALE U.S. Treasury and U.S. government agencies $ 143,495 $ — $ (2,568 ) $ 140,927 $ 148,968 $ 78 $ (1,791 ) $ 147,255 Mortgage-backed securities, residential 434,208 779 (8,843 ) 426,144 419,538 479 (5,763 ) 414,254 Mortgage-backed securities, multifamily 21,087 67 (204 ) 20,950 10,133 7 (63 ) 10,077 Obligations of states and political subdivisions 45,951 140 (586 ) 45,505 51,289 448 (417 ) 51,320 Debt securities 5,000 92 — 5,092 5,000 140 — 5,140 $ 649,741 $ 1,078 $ (12,201 ) $ 638,618 $ 634,928 $ 1,152 $ (8,034 ) $ 628,046
Reconciliation of Held-to-Maturity Securities	December 31, 2018 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) HELD TO MATURITY U.S. government agencies $ 33,025 $ — $ (677 ) $ 32,348 $ 33,415 $ 24 $ (402 ) $ 33,037 Mortgage-backed securities, residential 75,859 169 (1,838 ) 74,190 54,991 249 (978 ) 54,262 Mortgage-backed securities, multifamily 1,853 — (35 ) 1,818 1,957 — (22 ) 1,935 Obligations of states and political subdivisions 37,909 113 (328 ) 37,694 43,318 306 (188 ) 43,436 Debt securities 5,000 — (118 ) 4,882 6,004 14 — 6,018 $ 153,646 $ 282 $ (2,996 ) $ 150,932 $ 139,685 $ 593 $ (1,590 ) $ 138,688
Summary of Contractual Maturities of Investment Securities Classified as Available for Sale and Held to Maturity	The following table lists contractual maturities of investment securities classified as available for sale and held to maturity at December 31, 2018 . Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Available for Sale Held to Maturity Amortized Fair Amortized Fair Cost Value Cost Value (in thousands) Due in one year or less $ 30,766 $ 30,614 $ 7,061 $ 7,066 Due after one year through five years 104,519 102,754 42,103 41,720 Due after five years through ten years 40,768 40,108 23,752 23,185 Due after ten years 18,393 18,048 3,018 2,953 194,446 191,524 75,934 74,924 Mortgage-backed securities 455,295 447,094 77,712 76,008 Total securities $ 649,741 $ 638,618 $ 153,646 $ 150,932
Sales of Securities, Gross Gains and Gross Losses on Sales of Securities	The following table shows proceeds from sales of securities, gross gains and gross losses on sales and calls of securities for the periods indicated: Years Ended December 31, 2018 2017 2016 (in thousands) Sale proceeds $ — $ 4,500 $ 15,654 Gross gains — 2,539 370 Gross losses — (15 ) —
Reconciliation of Available-for-Sale and Held-to-Maturity Securities in Continuous Unrealized Loss Position	The following tables indicates the length of time individual securities have been in a continuous unrealized loss position at December 31, 2018 and 2017 : December 31, 2018 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Number of Securities Fair Value Unrealized Losses (dollars in thousands) AVAILABLE FOR SALE U.S. Treasury and U.S. government agencies $ 20,588 $ 216 $ 120,338 $ 2,352 27 $ 140,926 $ 2,568 Mortgage-backed securities, residential 10,119 58 316,851 8,785 139 326,970 8,843 Mortgage-backed securities, multifamily 1,977 2 12,911 202 4 14,888 204 Obligations of states and political subdivisions 1,289 2 26,522 584 50 27,811 586 $ 33,973 $ 278 $ 476,622 $ 11,923 220 $ 510,595 $ 12,201 HELD TO MATURITY U.S. government agencies $ — $ — $ 32,348 $ 677 6 $ 32,348 $ 677 Mortgage-backed securities, residential 8,325 59 53,761 1,779 36 62,086 1,838 Mortgage-backed securities, multifamily — — 1,818 35 2 1,818 35 Obligations of states and political subdivisions 1,764 8 15,580 320 27 17,344 328 Debt securities 3,882 118 — — 1 3,882 118 $ 13,971 $ 185 $ 103,507 $ 2,811 72 $ 117,478 $ 2,996 December 31, 2017 Less than 12 Months 12 Months or Longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Number of securities Fair Value Unrealized Losses (dollars in thousands) AVAILABLE FOR SALE U.S. Treasury and U.S. government agencies $ 80,391 $ 646 $ 54,769 $ 1,145 27 $ 135,160 $ 1,791 Mortgage-backed securities, residential 199,387 1,723 157,739 4,040 118 357,126 5,763 Mortgage-backed securities, multifamily — — 5,088 63 1 5,088 63 Obligations of states and political subdivisions 9,612 77 12,970 340 39 22,582 417 $ 289,390 $ 2,446 $ 230,566 $ 5,588 185 $ 519,956 $ 8,034 HELD TO MATURITY U.S. government agencies $ 15,371 $ 95 $ 6,720 $ 307 4 $ 22,091 $ 402 Mortgage-backed securities, residential 26,090 426 19,203 552 25 45,293 978 Mortgage-backed securities, multifamily 1,935 22 — — 2 1,935 22 Obligations of states and political subdivisions 15,353 56 6,028 132 23 21,381 188 $ 58,749 $ 599 $ 31,951 $ 991 54 $ 90,700 $ 1,590

Loans and Leases and Other Re_2

Loans and Leases and Other Real Estate (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Composition of Lakeland`s Loan and Lease Portfolio	The following sets forth the composition of Lakeland’s loan and lease portfolio: December 31, 2018 2017 (in thousands) Commercial, secured by real estate $ 3,057,779 $ 2,831,184 Commercial, industrial and other 336,735 340,400 Leases 87,925 75,039 Real estate - residential mortgage 329,854 322,880 Real estate - construction 319,545 264,908 Home equity and consumer 328,609 322,269 Total loans and leases 4,460,447 4,156,680 Less deferred fees (3,714 ) (3,960 ) Loans and leases, net of deferred fees $ 4,456,733 $ 4,152,720
Schedule of Changes in Accretable Yield	The following table presents changes in the accretable yield for PCI loans (in thousands): Years Ended December 31, 2018 2017 Balance, beginning of period $ 129 $ 145 Accretion (182 ) (202 ) Net reclassification non-accretable difference 134 186 Balance, end of period $ 81 $ 129
Lakeland's Non-Accrual Loans and Leases and Its Accruing Troubled Debt Restructurings (TDRs)	The following schedule sets forth certain information regarding Lakeland’s non-accrual loans and leases, its other real estate owned and other repossessed assets, and accruing troubled debt restructurings (“TDRs”) (in thousands): At December 31, 2018 2017 Commercial, secured by real estate $ 7,192 $ 5,890 Commercial, industrial and other 1,019 184 Leases 501 144 Real estate - residential mortgage 1,986 3,860 Real estate - construction — 1,472 Home equity and consumer 1,432 2,105 Total non-accrual loans and leases 12,130 13,655 Other real estate and other repossessed assets 830 843 Total non-performing assets $ 12,960 $ 14,498 Troubled debt restructurings, still accruing $ 9,293 $ 11,462
Age Analysis of Past Due Loans, Segregated by Class of Loans	An age analysis of past due loans, segregated by class of loans as of December 31, 2018 and 2017 , is as follows: December 31, 2018 30-59 Days Past Due 60-89 Days Past Due Greater Than 89 Days Total Past Due Current Total Loans and Leases Recorded Investment Greater than 89 Days and Still Accruing (in thousands) Commercial, secured by real estate $ 1,477 $ 639 $ 2,237 $ 4,353 $ 3,053,426 $ 3,057,779 $ — Commercial, industrial and other 173 243 750 1,166 335,569 336,735 — Leases 533 13 501 1,047 86,878 87,925 — Real estate - residential mortgage 743 111 1,776 2,630 327,224 329,854 — Real estate - construction — — — — 319,545 319,545 — Home equity and consumer 1,917 216 850 2,983 325,626 328,609 — $ 4,843 $ 1,222 $ 6,114 $ 12,179 $ 4,448,268 $ 4,460,447 $ — December 31, 2017 30-59 Days Past Due 60-89 Days Past Due Greater Than 89 Days Total Past Due Current Total Loans and Leases Recorded Investment Greater than 89 Days and Still Accruing (in thousands) Commercial, secured by real estate $ 3,663 $ 1,082 $ 3,817 $ 8,562 $ 2,822,622 $ 2,831,184 $ — Commercial, industrial and other 80 121 56 257 340,143 340,400 — Leases 496 139 144 779 74,260 75,039 — Real estate - residential mortgage 939 908 3,137 4,984 317,896 322,880 — Real estate - construction — — 1,472 1,472 263,436 264,908 — Home equity and consumer 1,258 310 1,386 2,954 319,315 322,269 200 $ 6,436 $ 2,560 $ 10,012 $ 19,008 $ 4,137,672 $ 4,156,680 $ 200
Impaired Loans with and without Specific Allowances	The following tables represent the Company's impaired loans at December 31, 2018 , 2017 and 2016 . December 31, 2018 Recorded Investment in Impaired Loans Contractual Unpaid Principal Balance Related Allowance Interest Income Recognized Average Investment in Impaired Loans (in thousands) Loans without related allowance: Commercial, secured by real estate $ 9,284 $ 9,829 $ — $ 188 $ 7,369 Commercial, industrial and other 1,151 1,449 — 19 1,834 Leases 301 597 — — 376 Real estate - residential mortgage — — — 4 242 Real estate - construction — — — — 726 Home equity and consumer — — — — — Loans with related allowance: Commercial, secured by real estate 7,270 7,597 307 317 7,594 Commercial, industrial and other 209 209 7 12 209 Leases 30 30 14 — 19 Real estate - residential mortgage 730 884 4 20 745 Real estate - construction — — — — — Home equity and consumer 727 765 6 32 898 Total: Commercial, secured by real estate $ 16,554 $ 17,426 $ 307 $ 505 $ 14,963 Commercial, industrial and other 1,360 1,658 7 31 2,043 Leases 331 627 14 — 395 Real estate - residential mortgage 730 884 4 24 987 Real estate - construction — — — — 726 Home equity and consumer 727 765 6 32 898 $ 19,702 $ 21,360 $ 338 $ 592 $ 20,012 December 31, 2017 Recorded Investment in Impaired Loans Contractual Unpaid Principal Balance Related Allowance Interest Income Recognized Average Investment in Impaired Loans (in thousands) Loans without related allowance: Commercial, secured by real estate $ 12,155 $ 12,497 $ — $ 366 $ 12,774 Commercial, industrial and other 618 618 — 25 618 Leases — — — — — Real estate - residential mortgage 963 980 — 15 996 Real estate - construction 1,471 1,471 — — 1,471 Home equity and consumer — — — — 6 Loans with related allowance: Commercial, secured by real estate 5,381 5,721 454 206 5,029 Commercial, industrial and other 164 164 9 14 283 Leases 65 65 30 — 29 Real estate - residential mortgage 781 919 4 27 940 Real estate - construction — — — — — Home equity and consumer 993 1,026 8 52 1,090 Total: Commercial, secured by real estate $ 17,536 $ 18,218 $ 454 $ 572 $ 17,803 Commercial, industrial and other 782 782 9 39 901 Leases 65 65 30 — 29 Real estate - residential mortgage 1,744 1,899 4 42 1,936 Real estate - construction 1,471 1,471 — — 1,471 Home equity and consumer 993 1,026 8 52 1,096 $ 22,591 $ 23,461 $ 505 $ 705 $ 23,236 December 31, 2016 Recorded Investment in Impaired Loans Contractual Unpaid Principal Balance Related Allowance Interest Income Recognized Average Investment in Impaired Loans (in thousands) Loans without related allowance: Commercial, secured by real estate $ 12,764 $ 13,195 $ — $ 229 $ 13,631 Commercial, industrial and other 603 603 — 24 1,109 Leases — — — — — Real estate - residential mortgage 1,880 3,146 — 16 2,430 Real estate - construction 1,471 1,471 — — 12 Home equity and consumer 139 139 — — 388 Loans with related allowance: Commercial, secured by real estate 5,860 6,142 392 273 6,549 Commercial, industrial and other 349 349 12 17 360 Leases — — — — 1 Real estate - residential mortgage 1,031 1,100 31 30 1,011 Real estate - construction — — — — — Home equity and consumer 1,188 1,211 94 59 1,184 Total: Commercial, secured by real estate $ 18,624 $ 19,337 $ 392 $ 502 $ 20,180 Commercial, industrial and other 952 952 12 41 1,469 Leases — — — — 1 Real estate - residential mortgage 2,911 4,246 31 46 3,441 Real estate - construction 1,471 1,471 — — 12 Home equity and consumer 1,327 1,350 94 59 1,572 $ 25,285 $ 27,356 $ 529 $ 648 $ 26,675
Lakeland's Commercial Loan Portfolio	The following table shows Lakeland’s commercial loan portfolio as of December 31, 2018 and 2017 , by the risk ratings discussed above (in thousands): December 31, 2018 Commercial, Secured by Real Estate Commercial, Industrial and Other RISK RATING Real Estate - Construction 1 $ — $ 1,119 $ — 2 — 18,462 — 3 69,995 36,367 — 4 933,577 91,145 17,375 5 1,910,423 168,474 297,625 5W - Watch 61,626 7,798 3,493 6 - Other assets especially mentioned 38,844 2,033 — 7 - Substandard 43,314 11,337 1,052 8 - Doubtful — — — 9 - Loss — — — Total $ 3,057,779 $ 336,735 $ 319,545 December 31, 2017 Commercial, Secured by Real Estate Commercial, Industrial and Other RISK RATING Real Estate - Construction 1 $ — $ 392 $ — 2 — 26,968 — 3 76,824 35,950 — 4 862,537 96,426 15,502 5 1,779,908 150,928 246,806 5W - Watch 47,178 8,779 — 6 - Other assets especially mentioned 40,245 8,670 — 7 - Substandard 24,492 12,287 2,600 8 - Doubtful — — — 9 - Loss — — — Total $ 2,831,184 $ 340,400 $ 264,908
Allowance for Loan and Lease Losses by Portfolio Segment and Related Recorded Investment in Loans and Leases	The following table details activity in the allowance for loan and lease losses by portfolio segment and the related recorded investment in loans and leases for the years ended December 31, 2018 and 2017 : December 31, 2018 Commercial, Secured by Real Estate Commercial, Industrial and Other Leases Real Estate - Residential Mortgage Real Estate - Construction Home Equity and Consumer Total (in thousands) Beginning balance $ 25,704 $ 2,313 $ 630 $ 1,557 $ 2,731 $ 2,520 $ 35,455 Charge-offs (421 ) (1,452 ) (507 ) (131 ) (248 ) (588 ) (3,347 ) Recoveries 468 317 23 10 17 332 1,167 Provision 2,130 564 841 130 515 233 4,413 Ending balance $ 27,881 $ 1,742 $ 987 $ 1,566 $ 3,015 $ 2,497 $ 37,688 Allowance for Loan and Leases Losses Ending balance: Individually evaluated for impairment $ 307 $ 7 $ 14 $ 4 $ — $ 6 $ 338 Ending balance: Collectively evaluated for impairment 27,574 1,735 973 1,562 3,015 2,491 37,350 Ending balance $ 27,881 $ 1,742 $ 987 $ 1,566 $ 3,015 $ 2,497 $ 37,688 Loans and Leases Ending balance: Individually evaluated for impairment $ 16,554 $ 1,360 $ 331 $ 730 $ — $ 727 $ 19,702 Ending balance: Collectively evaluated for impairment 3,040,573 335,375 87,594 329,124 319,545 327,882 4,440,093 Ending balance: Loans acquired with deteriorated credit quality 652 — — — — — 652 Ending balance (1) $ 3,057,779 $ 336,735 $ 87,925 $ 329,854 $ 319,545 $ 328,609 $ 4,460,447 (1) Excludes deferred fees December 31, 2017 Commercial, Secured by Real Estate Commercial, Industrial and Other Leases Real Estate - Residential Mortgage Real Estate - Construction Home Equity and Consumer Total (in thousands) Beginning balance $ 21,223 $ 1,723 $ 548 $ 1,964 $ 2,352 $ 3,435 $ 31,245 Charge-offs (762 ) (477 ) (305 ) (441 ) (609 ) (852 ) (3,446 ) Recoveries 396 172 59 5 31 903 1,566 Provision 4,847 895 328 29 957 (966 ) 6,090 Ending balance $ 25,704 $ 2,313 $ 630 $ 1,557 $ 2,731 $ 2,520 $ 35,455 Allowance for Loan and Leases Losses Ending balance: Individually evaluated for impairment $ 454 $ 9 $ 30 $ 4 $ — $ 8 $ 505 Ending balance: Collectively evaluated for impairment 25,250 2,304 600 1,553 2,731 2,512 34,950 Ending balance $ 25,704 $ 2,313 $ 630 $ 1,557 $ 2,731 $ 2,520 $ 35,455 Loans and Leases Ending balance: Individually evaluated for impairment $ 17,536 $ 782 $ 65 $ 1,744 $ 1,471 $ 993 $ 22,591 Ending balance: Collectively evaluated for impairment 2,812,941 339,618 74,974 321,136 263,437 321,273 4,133,379 Ending balance: Loans acquired with deteriorated credit quality 707 — — — — 3 710 Ending balance (1) $ 2,831,184 $ 340,400 $ 75,039 $ 322,880 $ 264,908 $ 322,269 $ 4,156,680 (1) Excludes deferred fees
Summary of Restructured Loans	The following table summarizes loans and leases that have been restructured during the periods presented: For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment (dollars in thousands) Commercial, secured by real estate 5 $ 3,348 $ 3,348 8 $ 4,618 $ 4,618 Commercial, industrial and other 1 950 950 2 124 124 Leases 1 15 15 6 65 65 7 $ 4,313 $ 4,313 16 $ 4,807 $ 4,807
Summary of Restructured Loans within Previous 12 Months that have Subsequently Defaulted	The following table presents loans and leases modified as TDRs within the previous 12 months from December 31, 2018 and 2017 that have defaulted during the subsequent twelve months: For the Year Ended December 31, 2018 For the Year Ended December 31, 2017 Number of Contracts Recorded Investment Number of Contracts Recorded Investment (dollars in thousands) Commercial, secured by real estate 1 $ 171 — $ — Leases — $ — 2 $ 35 1 $ 171 2 $ 35
Summary of Future Minimum Lease Payments of Lease Receivables	Future minimum lease payments of lease receivables are expected as follows (in thousands): 2019 $ 30,384 2020 24,297 2021 18,089 2022 10,814 2023 3,969 Thereafter 372 $ 87,925

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	Estimated December 31, Useful Lives 2018 2017 (in thousands) Land Indefinite $ 10,471 $ 10,626 Buildings and building improvements 10 to 50 years 47,006 46,985 Leasehold improvements 10 to 25 years 12,880 12,953 Furniture, fixtures and equipment 2 to 30 years 27,858 26,923 98,215 97,487 Less accumulated depreciation and amortization 49,040 47,174 $ 49,175 $ 50,313

Time Deposits (Tables)

Time Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Schedule of Maturities of Certificates of Deposit	At December 31, 2018 , the schedule of maturities of certificates of deposit is as follows (in thousands): Year 2019 $ 568,350 2020 108,881 2021 35,698 2022 41,235 2023 2,874 $ 757,038

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of Information Relating to Securities Sold Under Agreements to Repurchase and Federal Funds Purchased	The following tables summarize information relating to securities sold under agreements to repurchase and federal funds purchased for the years presented. For purposes of the tables, the average amount outstanding was calculated based on a daily average. Federal Funds Purchased 2018 2017 2016 (dollars in thousands) Balance at December 31, $ 192,064 $ 80,000 $ 32,000 Interest rate at December 31, 2.88 % 1.71 % 0.85 % Maximum amount outstanding at any month-end during the year $ 214,165 $ 168,784 $ 133,434 Average amount outstanding during the year $ 21,338 $ 13,264 $ 8,708 Weighted average interest rate during the year 2.03 % 1.42 % 0.71 % Securities Sold Under Agreements to Repurchase 2018 2017 2016 (dollars in thousands) Balance at December 31, $ 41,841 $ 44,936 $ 24,354 Interest rate at December 31, 0.26 % 0.02 % 0.02 % Maximum amount outstanding at any month-end during the year $ 50,526 $ 44,936 $ 32,872 Average amount outstanding during the year $ 32,435 $ 28,480 $ 27,535 Weighted average interest rate during the year 0.12 % 0.03 % 0.03 %
Summary of FHLB Debt Matures	FHLB debt matures as follows (in thousands): 2019 $ 40,264 2020 55,880 2021 44,971 2022 15,566 2023 24,437 $ 181,118

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Components of Income Taxes	The components of income taxes are as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Current tax provision $ 30,459 $ 10,565 $ 22,308 Deferred tax expense (benefit) (13,571 ) 16,904 (987 ) Total provision for income taxes $ 16,888 $ 27,469 $ 21,321
Summary of Income Tax Provision Reconciled to Income Taxes that Computed at Statutory Federal Rate	The income tax provision reconciled to the income taxes that would have been computed at the statutory federal rate of 21% for 2018 and 35% for both 2017 and 2016 is as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Federal income tax, at statutory rates $ 16,861 $ 28,017 $ 21,994 Increase (deduction) in taxes resulting from: Tax-exempt income (1,096 ) (1,652 ) (1,671 ) Excise tax on real estate investment trust ("REIT") dividend — 1,945 — Adjustment to net deferred tax asset for Tax Cuts and Jobs Act — (1,343 ) — State income tax, net of federal income tax effect 1,880 931 552 Adjustment to net deferred tax asset for change in NJ tax law (943 ) — — Excess tax benefits from employee share-based payments (318 ) (587 ) — Other, net 504 158 446 Provision for income taxes $ 16,888 $ 27,469 $ 21,321
Summary of Net Deferred Tax Asset	The net deferred tax asset consisted of the following: December 31, 2018 2017 Deferred tax assets: (in thousands) Allowance for loan and lease losses $ 11,651 $ 10,662 Stock based compensation plans 865 769 Purchase accounting fair market value adjustments 1,192 1,441 Non-accrued interest 256 394 Deferred compensation 2,142 2,007 Depreciation and amortization 630 805 Other-than-temporary impairment loss on investment securities 59 77 Unrealized losses on securities available for sale 3,162 1,108 Other, net 585 675 Gross deferred tax assets 20,542 17,938 Deferred tax liabilities: Core deposit intangible from acquired companies 516 664 Undistributed income from subsidiary not consolidated for tax return purposes (REIT) 149 12,015 Deferred loan costs 1,418 1,169 Prepaid expenses 459 524 Deferred gain on securities 166 116 Unfunded pension benefits 17 7 Loss on equity securities 36 — Unrealized gains on hedging derivative 322 229 Other 270 357 Gross deferred tax liabilities 3,353 15,081 Net deferred tax assets $ 17,189 $ 2,857

Directors Retirement Plan (Tabl

Directors Retirement Plan (Tables) - Director	12 Months Ended
	Dec. 31, 2018
Status of Directors Retirement Plan	The measurement date for the accumulated benefit obligation is December 31 of the years presented. December 31, 2018 2017 (in thousands) Accrued plan cost included in other liabilities $ 604 $ 673 Amount not recognized as component of net postretirement benefit cost Recognized in accumulated other comprehensive income Net actuarial gain $ (29 ) $ 28 Unrecognized prior service cost — — Amounts not recognized as a component of net postretirement benefit (benefit) $ (29 ) $ 28
Components of Net Periodic Pension Cost	Years Ended December 31, 2018 2017 2016 (in thousands) Net periodic plan cost included the following components: Service cost $ 15 $ 21 $ 19 Interest cost 20 23 26 Amortization of prior service cost — 3 12 $ 35 $ 47 $ 57
Benefits Expected to be Paid	The directors' retirement plan holds no plan assets. The benefits expected to be paid in each of the next five years and in aggregate for the five years thereafter are as follows (in thousands): 2019 $ 57 2020 63 2021 37 2022 38 2023 38 2024-2028 235

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Option Activity under the Company's Stock Option Plans	A summary of the status of the Company’s option plans as of December 31, 2018 and the changes during the year ending on that date is represented below. Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in Years) Aggregate Intrinsic Value Outstanding, beginning of year 102,216 $ 8.49 4.27 $ 1,101,806 Granted — — Exercised (34,728 ) 8.84 Expired — — Forfeited — — Outstanding, end of year 67,488 $ 8.28 2.86 $ 440,483 Options exercisable at year-end 67,488 $ 8.28 2.86 $ 440,483
Summary of Company's Restricted Stock	Information regarding the Company’s RSUs and changes during the year ended December 31, 2018 is as follows: Number of RSUs Weighted Average Price Outstanding, Balance at of January 1, 2018 267,732 $ 13.93 Granted 159,233 19.09 Vested (119,421 ) 13.76 Forfeited (8,197 ) 18.99 Outstanding, December 31, 2018 299,347 $ 16.60 Information regarding the Company’s restricted stock for the year ended December 31, 2018 is as follows: Number of Shares Weighted Average Price Outstanding, Balance at of January 1, 2018 22,982 $ 14.44 Granted 11,575 20.30 Vested (22,856 ) 14.46 Outstanding, December 31, 2018 11,701 $ 20.18

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table sets forth the components of noninterest income for the years ended December 31, 2018 , 2017 and 2016 : 2018 2017 2016 (in thousands) Deposit Related Fees and Charges Debit card interchange income $ 5,150 $ 4,474 $ 4,086 Overdraft charges 3,938 4,656 4,763 ATM service charges 830 808 705 Demand deposit fees and charges 540 679 546 Savings service charges 126 123 57 Total 10,584 10,740 10,157 Commissions and Fees Loan and lease fees 1,264 1,136 1,198 Wire transfer charges 1,093 1,005 914 Investment services income 1,314 1,045 973 Merchant fees 784 718 444 Commissions from sales of checks 434 457 448 Safe deposit income 371 269 247 Other income 264 202 96 Total 5,524 4,832 4,320 Gains on Sale of Loans 1,329 1,836 2,123 Other Income Gains on customer swap transactions 1,992 982 1,056 Title insurance income 195 200 142 Other income 295 518 431 Total 2,482 1,700 1,629 Revenue not from contracts with customers 2,391 6,327 3,101 Total Noninterest Income $ 22,310 $ 25,435 $ 21,330 Timing of Revenue Recognition Products and services transferred at a point in time $ 19,844 $ 19,040 $ 18,192 Products and services transferred over time 75 68 37 Revenue not from contracts with customers 2,391 6,327 3,101 Total Noninterest Income $ 22,310 $ 25,435 $ 21,330

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Aggregate Future Minimum Commitments of Lease Payments	At December 31, 2018 , the minimum commitments under all noncancellable leases with remaining terms of more than one year and expiring through 2033 are as follows (in thousands): Year 2019 $ 3,191 2020 3,055 2021 2,866 2022 2,572 2023 2,233 Thereafter 14,642 $ 28,559

Financial Instruments with Of_2

Financial Instruments with Off-Balance-Sheet Risk and Concentrations of Credit Risk (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Approximate Contract Amounts of Collateral or Other Security to Support Financial Instruments with Credit Risk	Lakeland generally requires collateral or other security to support financial instruments with credit risk. The approximate contract amounts are as follows: December 31, 2018 2017 (in thousands) Financial instruments whose contract amounts represent credit risk Commitments to extend credit $ 973,709 $ 966,441 Standby letters of credit and financial guarantees written 21,585 14,832

Comprehensive Income (Loss) (Ta

Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Components of Other Comprehensive Income	The following table shows the changes in the balances of each of the components of other comprehensive income for the periods presented. Year Ended December 31, 2018 Before Tax Amount Tax Benefit (Expense) Net of Tax Amount (in thousands) Unrealized losses on securities available for sale Unrealized holding losses arising during period $ (4,241 ) $ 734 $ (3,507 ) Reclassification adjustment for securities gains included in net income — — — Net unrealized losses on securities available for sale (4,241 ) 734 (3,507 ) Unrealized gains on derivatives 9 32 41 Change in pension liability, net 29 (9 ) 20 Other comprehensive loss $ (4,203 ) $ 757 $ (3,446 ) Year Ended December 31, 2017 Before Tax Amount Tax Benefit (Expense) Net of Tax Amount (in thousands) Unrealized losses on securities available for sale Unrealized holding losses arising during period $ (1,406 ) $ 503 $ (903 ) Reclassification adjustment for securities gains included in net income (2,524 ) 884 (1,640 ) Net unrealized losses on securities available for sale (3,930 ) 1,387 (2,543 ) Unrealized gains on derivatives 57 (20 ) 37 Change in pension liability, net (27 ) 11 (16 ) Other comprehensive loss $ (3,900 ) $ 1,378 $ (2,522 ) Year Ended December 31, 2016 Before Tax Amount Tax Benefit (Expense) Net of Tax Amount (in thousands) Unrealized losses on securities available for sale Unrealized holding losses arising during period $ (1,816 ) $ 778 $ (1,038 ) Reclassification adjustment for securities gains included in net income (370 ) 137 (233 ) Net unrealized losses on available for sale securities (2,186 ) 915 (1,271 ) Unrealized gains on derivatives 1,033 (361 ) 672 Change in pension liability, net 70 (28 ) 42 Other comprehensive loss $ (1,083 ) $ 526 $ (557 )
Summary of Changes in Accumulated Other Comprehensive Income	Unrealized Gains (Losses) on Available- for-Sale Securities Unrealized Gains (Losses) on Derivatives Pension Items Total (in thousands, net of tax) Balance at of January 1, 2016 $ 1,154 $ — $ (4 ) $ 1,150 Other comprehensive income (loss) before classifications (1,038 ) 672 42 (324 ) Amounts reclassified from accumulated other comprehensive income (233 ) $ — — (233 ) Net current period other comprehensive income (loss) (1,271 ) 672 42 $ (557 ) Balance at December 31, 2016 $ (117 ) $ 672 $ 38 $ 593 Other comprehensive income (loss) before classifications (903 ) 37 (16 ) (882 ) Amounts reclassified from accumulated other comprehensive income (1,640 ) — — (1,640 ) Net current period other comprehensive income (loss) (2,543 ) 37 (16 ) (2,522 ) Adjustment for implementation of ASU 2018-02 (572 ) 153 (1 ) (420 ) Balance at December 31, 2017 $ (3,232 ) $ 862 $ 21 $ (2,349 ) Adjustment for implementation of ASU 2016-01 (2,043 ) — — (2,043 ) Adjusted balance as of January 1, 2018 (5,275 ) 862 21 (4,392 ) Other comprehensive income (loss) before classifications (3,507 ) 41 20 (3,446 ) Amounts reclassified from accumulated other comprehensive income — — — — Net current period other comprehensive income (loss) (3,507 ) 41 20 (3,446 ) Balance at December 31, 2018 $ (8,782 ) $ 903 $ 41 $ (7,838 )

Fair Value Measurement and Fa_2

Fair Value Measurement and Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets and Liabilities Measured on Recurring Basis	Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: December 31, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value (in thousands) Assets: Investment securities, available for sale U.S. Treasury and government agencies $ 4,920 $ 136,007 $ — $ 140,927 Mortgage-backed securities — 447,094 — 447,094 Obligations of states and political subdivisions — 45,505 — 45,505 Corporate debt securities — 5,092 — 5,092 Total securities available for sale 4,920 633,698 — 638,618 Equity securities, at fair value 2,731 13,190 — 15,921 Derivative assets — 12,135 — 12,135 Total Assets $ 7,651 $ 659,023 $ — $ 666,674 Liabilities: Derivative liabilities $ — $ 11,036 $ — $ 11,036 Total Liabilities $ — $ 11,036 $ — $ 11,036 December 31, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Fair Value (in thousands) Assets: Investment securities, available for sale U.S. Treasury and government agencies $ 5,415 $ 141,840 $ — $ 147,255 Mortgage-backed securities — 424,331 — 424,331 Obligations of states and political subdivisions — 51,320 — 51,320 Corporate debt securities — 5,140 — 5,140 Total securities available for sale 5,415 622,631 — 628,046 Equity securities, at fair value 5,147 12,942 — 18,089 Derivative assets — 6,555 — 6,555 Total Assets $ 10,562 $ 642,128 $ — $ 652,690 Liabilities: Derivative liabilities $ — $ 5,465 $ — $ 5,465 Total Liabilities $ — $ 5,465 $ — $ 5,465
Fair Value of Financial Assets Measured on Non-recurring Basis	The following table sets forth the Company’s financial assets subject to fair value adjustments (impairment) on a non-recurring basis. Assets are classified in their entirety based on the lowest level of input that is significant to the fair value measurement: December 31, 2018 (Level 1) (Level 2) (Level 3) Total Fair Value (in thousands) Assets: Impaired loans and leases $ — $ — $ 19,702 $ 19,702 Loans held for sale — 1,113 — 1,113 Other real estate owned and other repossessed assets — — 830 830 December 31, 2017 (Level 1) (Level 2) (Level 3) Total Fair Value (in thousands) Assets: Impaired loans and leases $ — $ — $ 22,591 $ 22,591 Loans held for sale — 456 — 456 Other real estate owned and other repossessed assets — — 843 843
Carrying Values and Fair Values of Company's Financial Instruments	The following table presents the carrying values, fair values and placement in the fair value hierarchy of the Company’s financial instruments as of December 31, 2018 and December 31, 2017 : December 31, 2018 Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Financial Assets: Investment securities held to maturity $ 153,646 $ 150,932 $ — $ 143,913 $ 7,019 Federal Home Loan and other membership bank stock 13,301 13,301 — 13,301 — Loans and leases, net 4,419,045 4,341,477 — — 4,341,477 Financial Liabilities: Certificates of deposit 757,038 750,801 — 750,801 — Other borrowings 181,118 176,921 — 176,921 — Subordinated debentures 105,027 102,497 — — 102,497 December 31, 2017 Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) (in thousands) Financial Assets: Investment securities held to maturity $ 139,685 $ 138,688 $ — $ 127,901 $ 10,787 Federal Home Loan and other membership bank stock 12,576 12,576 — 12,576 — Loans and leases, net 4,117,265 4,114,516 — — 4,114,516 Financial Liabilities: Certificates of deposit 737,428 732,417 — 732,417 — Other borrowings 192,011 189,080 — 189,080 — Subordinated debentures 104,902 97,244 — — 97,244

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary Information Regarding Derivatives	The following table presents summary information regarding these derivatives for the periods presented (dollars in thousands): December 31, 2018 Notional Amount Average Maturity (Years) Weighted Average Rate Fixed Weighted Average Variable Rate Fair Value Classified in Other Assets: 3rd Party interest rate swaps $ 153,909 8.3 4.10 % 1 Mo. LIBOR + 2.13% $ 5,329 Customer interest rate swaps 164,427 12.0 5.04 % 1 Mo. LIBOR + 2.05% 5,707 Interest rate swap (cash flow hedge) 30,000 2.5 1.10 % 3 Mo. LIBOR 1,099 Classified in Other Liabilities: Customer interest rate swaps $ 153,909 8.3 4.10 % 1 Mo. LIBOR + 2.13% $ (5,329 ) 3rd party interest rate swaps 164,427 12.0 5.04 % 1 Mo. LIBOR + 2.05% (5,707 )

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Summary of Capital Ratios	As of December 31, 2018 and 2017 , the Company and Lakeland have the following capital ratios based on the then current regulations: Actual For Capital Adequacy Purposes with Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions December 31, 2018 Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total capital (to risk-weighted assets) Company $ 637,377 13.71 % > $ 458,952 > 9.875% N/A N/A Lakeland 605,560 13.06 % $ 457,912 9.875 % > $ 463,708 > 10.00% Tier 1 capital (to risk-weighted assets) Company $ 523,577 11.27 % > $ 366,000 > 7.875% N/A N/A Lakeland 565,549 12.20 % $ 365,170 7.875 % > $ 370,967 > 8.00% Common equity Tier 1 capital (to risk-weighted assets) Company $ 493,577 10.62 % > $ 296,285 > 6.375% N/A N/A Lakeland 565,549 12.20 % $ 295,614 6.375 % > $ 301,410 > 6.50% Tier 1 capital (to average assets) Company $ 523,577 9.39 % > $ 222,982 > 4.00% N/A N/A Lakeland 565,549 10.17 % $ 222,539 4.00 % > $ 278,173 > 5.00% Actual For Capital Adequacy Purposes with Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions December 31, 2017 Amount Ratio Amount Ratio Amount Ratio (dollars in thousands) Total capital (to risk-weighted assets) Company $ 589,047 13.40 % > $ 406,477 > 9.25% N/A N/A Lakeland 563,910 12.86 % $ 405,552 9.25 % > $ 438,435 > 10.00% Tier 1 capital (to risk-weighted assets) Company $ 477,453 10.87 % > $ 318,590 > 7.25% N/A N/A Lakeland 525,979 12.00 % $ 317,865 7.25 % > $ 350,748 > 8.00% Common equity Tier 1 capital (to risk-weighted assets) Company $ 447,453 10.18 % > $ 252,675 > 5.75% N/A N/A Lakeland 525,979 12.00 % $ 252,100 5.75 % > $ 284,983 > 6.50% Tier 1 capital (to average assets) Company $ 477,453 9.12 % > $ 209,431 > 4.00% N/A N/A Lakeland 525,979 10.06 % $ 209,239 4.00 % > $ 261,548 > 5.00%

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Estimated Future Amortization Expense	The estimated future amortization expense for each of the succeeding five years ended December 31 is as follows (in thousands): For the Year Ended 2019 $ 505 2020 415 2021 326 2022 236 2023 147

Condensed Financial Informati_2

Condensed Financial Information - Parent Company Only (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheets	CONDENSED BALANCE SHEETS December 31, 2018 2017 (in thousands) ASSETS Cash and due from banks $ 23,285 $ 17,695 Equity securities 2,743 5,158 Investment securities, held to maturity 1,000 1,000 Investment in subsidiaries 695,571 659,180 Other assets 7,182 6,013 TOTAL ASSETS $ 729,781 $ 689,046 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 1,015 $ 1,022 Subordinated debentures 105,027 104,902 Total stockholders’ equity 623,739 583,122 TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY $ 729,781 $ 689,046
Condensed Statements of Operations	CONDENSED STATEMENTS OF INCOME Years Ended December 31, 2018 2017 2016 (in thousands) INCOME Dividends from subsidiaries $ 30,589 $ 26,665 $ 20,687 Other income (125 ) 2,750 199 TOTAL INCOME 30,464 29,415 20,886 EXPENSE Interest on subordinated debentures 5,141 5,091 2,171 Noninterest expenses 506 377 442 TOTAL EXPENSE 5,647 5,468 2,613 Income before (benefit) provision for income taxes 24,817 23,947 18,273 Income taxes (benefit) provision (1,130 ) (2,018 ) (845 ) Income before equity in undistributed income of subsidiaries 25,947 25,965 19,118 Equity in undistributed income of subsidiaries 37,454 26,615 22,400 NET INCOME AVAILABLE TO COMMON SHAREHOLDERS $ 63,401 $ 52,580 $ 41,518
Condensed Statements of Cash Flows	Years Ended December 31, 2018 2017 2016 (in thousands) INCOME Dividends from subsidiaries $ 30,589 $ 26,665 $ 20,687 Other income (125 ) 2,750 199 TOTAL INCOME 30,464 29,415 20,886 EXPENSE Interest on subordinated debentures 5,141 5,091 2,171 Noninterest expenses 506 377 442 TOTAL EXPENSE 5,647 5,468 2,613 Income before (benefit) provision for income taxes 24,817 23,947 18,273 Income taxes (benefit) provision (1,130 ) (2,018 ) (845 ) Income before equity in undistributed income of subsidiaries 25,947 25,965 19,118 Equity in undistributed income of subsidiaries 37,454 26,615 22,400 NET INCOME AVAILABLE TO COMMON SHAREHOLDERS $ 63,401 $ 52,580 $ 41,518 CONDENSED STATEMENTS OF CASH FLOWS Years Ended December 31, 2018 2017 2016 (in thousands) CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 63,401 $ 52,580 $ 41,518 Adjustments to reconcile net income to net cash provided by (used in) operating activities: Gain on securities — (2,539 ) — Amortization of subordinated debt costs 125 118 30 Change in market value of equity securities 338 — — Excess tax benefits 318 587 — Increase in other assets (1,446 ) (1,927 ) (922 ) (Decrease) increase in other liabilities (6 ) (17 ) 1,010 Equity in undistributed income of subsidiaries (37,454 ) (26,615 ) (22,400 ) NET CASH PROVIDED BY OPERATING ACTIVITIES 25,276 22,187 19,236 CASH FLOWS FROM INVESTING ACTIVITIES Net cash used in acquisition — — (5,356 ) Purchases of available for sale securities — (79 ) (62 ) Purchases of equity securities (78 ) — — Proceeds from sale of available for sale securities — 3,217 — Proceeds from sale of equity securities 2,155 — — Contribution to subsidiary — — (124,373 ) NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES 2,077 3,138 (129,791 ) CASH FLOWS FROM FINANCING ACTIVITIES Cash dividends paid on common stock (21,307 ) (18,853 ) (16,007 ) Proceeds from issuance of common stock, net — — 48,678 Proceeds from issuance of subordinated debt, net — — 73,516 Retirement of restricted stock (763 ) (773 ) (206 ) Excess tax benefits — — 43 Exercise of stock options 307 321 285 NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES (21,763 ) (19,305 ) 106,309 Net increase (decrease) in cash and cash equivalents 5,590 6,020 (4,246 ) Cash and cash equivalents, beginning of year 17,695 11,675 15,921 CASH AND CASH EQUIVALENTS, END OF YEAR $ 23,285 $ 17,695 $ 11,675

Summary of Accounting Policie_2

Summary of Accounting Policies - Additional Information (Detail)	Nov. 30, 2017	Dec. 31, 2018USD ($)Segment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jan. 01, 2018USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of operating segments | Segment		1
Number of reportable segments | Segment		1
Principal and interest default period		90 days
Period of principal and interest payments in arrears for open-end consumer loans are reviewed for charge-off		4 months
Residential mortgage loans are placed on non-accrual status at the time principal and interest period		90 days
Non-accrual asset satisfactory payments period		6 months
Non-accrual loans with recorded investment, minimum amount		$ 500,000
Maximum amount of individual impaired commercial loans that places into homogeneous pool for collective evaluation		500,000
Amount of loans sold that are being serviced for others		19,900,000	$ 23,000,000
Originated mortgage servicing rights		68,000	88,000
Goodwill likelihood probability percentage	50.00%
Bank owned life insurance		110,052,000	107,489,000
Income on bank owned life insurance		3,256,000	2,354,000	$ 2,562,000
Company's liability to trusts including investments		$ 30,000,000
Cumulative adjustment for adoption					$ 0
Percentage of capital permitted for trust preferred securities		25.00%
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment for adoption			2,000,000		2,043,000
Accumulated Other Comprehensive Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment for adoption			(420,000)		$ (2,043,000)
ASU 2018-02 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment for adoption			420,000
ASU 2018-02 | Accumulated Other Comprehensive Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment for adoption			$ 420,000

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) $ / shares in Units, $ in Thousands	Jan. 04, 2019USD ($)Branch$ / sharesshares	Jan. 07, 2016USD ($)Branch$ / sharesshares	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Business Acquisition, Contingent Consideration [Line Items]
Assets			$ 5,806,093	$ 5,405,639
Loans and leases, net of deferred fees			4,456,733	4,152,720
Deposits			4,620,670	4,368,748
Total stockholders’ equity			623,739	583,122	$ 550,044	$ 400,516
Merger and acquisition integration-related expenses			$ 464	$ 0	$ 4,103
Pascack Bancorp, Inc.
Business Acquisition, Contingent Consideration [Line Items]
Consideration paid through common stock | shares		3,314,284
Consideration price per share (usd per share) | $ / shares		$ 11.35
Average strike price (usd per share) | $ / shares		$ 7.37
Cash paid in connection with cancellation of the old stock options		$ 122
Pascack Bancorp, Inc. | New Jersey
Business Acquisition, Contingent Consideration [Line Items]
Number of bank branches operated | Branch		8
Subsequent Event [Member] | Highlands Bancorp, Inc.
Business Acquisition, Contingent Consideration [Line Items]
Assets	$ 480,800
Loans and leases, net of deferred fees	438,300
Deposits	408,800
Total stockholders’ equity	$ 31,200
Subsequent Event [Member] | Highlands Bancorp, Inc.
Business Acquisition, Contingent Consideration [Line Items]
Consideration paid through common stock | shares	2,837,524
Consideration price per share (usd per share) | $ / shares	$ 14.71
Average strike price (usd per share) | $ / shares	$ 8.09
Cash paid in connection with cancellation of the old stock options	$ 797
Subsequent Event [Member] | Highlands Bancorp, Inc. | New Jersey
Business Acquisition, Contingent Consideration [Line Items]
Number of bank branches operated | Branch	4
Conversion ratio	1.015

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic earnings per share
Net income available to common shareholders, Income	$ 63,401	$ 52,580	$ 41,518
Less: earnings allocated to participating securities, Income	(582)	(480)	(396)
Net income available to common shareholders, Total	$ 62,819	$ 52,100	$ 41,122
Net income available to common shareholders, Shares	47,578	47,438	42,912
Less: earnings allocated to participating securities, Shares	0	0	0
Net income available to common shareholders, Total	47,578	47,438	42,912
Net income available to common shareholders, Per share amount	$ 1.33	$ 1.11	$ 0.97
Less: earnings allocated to participating securities, Per share amount	(0.01)	(0.01)	(0.01)
Net income available to common shareholders, Total	$ 1.32	$ 1.10	$ 0.96
Effect of dilutive securities
Stock options and restricted stock, Income	$ 0	$ 0	$ 0
Stock options and restricted stock, Shares	188	236	202
Stock options and restricted stock, Per share amount	$ 0	$ (0.01)	$ (0.01)
Diluted earnings per share
Net income available to common shareholders plus assumed conversions, Income	$ 62,819	$ 52,100	$ 41,122
Net income available to common shareholders plus assumed conversions, Shares	47,766	47,674	43,114
Net income available to common shareholders plus assumed conversions, Per share amount	$ 1.32	$ 1.09	$ 0.95

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options to purchase	0	0	0

Investment Securities - Reconci

Investment Securities - Reconciliation of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 649,741	$ 634,928
Gross Unrealized Gains	1,078	1,152
Gross Unrealized Losses	(12,201)	(8,034)
Fair Value	638,618	628,046
Debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,000	5,000
Gross Unrealized Gains	92	140
Gross Unrealized Losses	0	0
Fair Value	5,092	5,140
Obligations of states and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	45,951	51,289
Gross Unrealized Gains	140	448
Gross Unrealized Losses	(586)	(417)
Fair Value	45,505	51,320
Mortgage-backed securities, multifamily
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	21,087	10,133
Gross Unrealized Gains	67	7
Gross Unrealized Losses	(204)	(63)
Fair Value	20,950	10,077
Mortgage-backed securities, residential
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	434,208	419,538
Gross Unrealized Gains	779	479
Gross Unrealized Losses	(8,843)	(5,763)
Fair Value	426,144	414,254
U.S. Treasury and U.S. government agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	143,495	148,968
Gross Unrealized Gains	0	78
Gross Unrealized Losses	(2,568)	(1,791)
Fair Value	$ 140,927	$ 147,255

Investment Securities - Recon_2

Investment Securities - Reconciliation of Held-to-Maturity Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 153,646	$ 139,685
Gross Unrealized Gains	282	593
Gross Unrealized Losses	(2,996)	(1,590)
Fair Value	150,932	138,688
Debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	5,000	6,004
Gross Unrealized Gains	0	14
Gross Unrealized Losses	(118)	0
Fair Value	4,882	6,018
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	37,909	43,318
Gross Unrealized Gains	113	306
Gross Unrealized Losses	(328)	(188)
Fair Value	37,694	43,436
Mortgage-backed securities, multifamily
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,853	1,957
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(35)	(22)
Fair Value	1,818	1,935
Mortgage-backed securities, residential
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	75,859	54,991
Gross Unrealized Gains	169	249
Gross Unrealized Losses	(1,838)	(978)
Fair Value	74,190	54,262
U.S. government agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	33,025	33,415
Gross Unrealized Gains	0	24
Gross Unrealized Losses	(677)	(402)
Fair Value	$ 32,348	$ 33,037

Investment Securities - Summary

Investment Securities - Summary of Contractual Maturities of Investment Securities Classified as Available for Sale and Held to Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Available for Sale, Amortized Cost
Due in one year or less	$ 30,766
Due after one year through five years	104,519
Due after five years through ten years	40,768
Due after ten years	18,393
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	194,446
Total	649,741
Available for Sale, Fair Value
Due in one year or less	30,614
Due after one year through five years	102,754
Due after five years through ten years	40,108
Due after ten years	18,048
Total	191,524
Investment securities, available for sale, at fair value	638,618
Held to Maturity, Amortized Cost
Due in one year or less	7,061
Due after one year through five years	42,103
Due after five years through ten years	23,752
Due after ten years	3,018
Total	75,934
Amortized Cost	153,646	$ 139,685
Held to Maturity, Fair Value
Due in one year or less	7,066
Due after one year through five years	41,720
Due after five years through ten years	23,185
Due after ten years	2,953
Total	74,924
Total securities, Held to Maturity, Fair Value	150,932	$ 138,688
Mortgage-backed securities
Available for Sale, Amortized Cost
Available for sale	455,295
Available for Sale, Fair Value
Available for sale	447,094
Held to Maturity, Amortized Cost
Held to maturity	77,712
Held to Maturity, Fair Value
Held to maturity	$ 76,008

Investment Securities - Sales o

Investment Securities - Sales of Securities, Gross Gains and Gross Losses on Sales of Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Sale proceeds	$ 0	$ 4,500	$ 15,654
Gross gains	0	2,539	370
Gross losses	$ 0	$ (15)	$ 0

Investment Securities - Additio

Investment Securities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
Investment [Line Items]
Cumulative adjustment for adoption				$ 0
Equity securities, at fair value	$ 15,921,000	$ 18,089,000
Loss on equity securities	(583,000)	0	$ 0
Securities, carrying value	476,300,000	400,400,000
Market value of equities	2,700,000
Equity securities included in investment funds	13,200,000
Investment in community development loans	$ 3,500,000
Redemption of funds	60 days
Unfunded commitments	$ 0
Amortized cost of securities	10,400,000
Fair value of securities	$ 9,700,000
Retained Earnings
Investment [Line Items]
Cumulative adjustment for adoption		$ 2,000,000		$ 2,043,000

Investment Securities - Recon_3

Investment Securities - Reconciliation of Available-for-Sale and Held-to-Maturity Securities in Continuous Unrealized Loss Position (Detail) $ in Thousands	Dec. 31, 2018USD ($)Security	Dec. 31, 2017USD ($)Security
Investment [Line Items]
Available for Sale, Less than 12 Months, Fair Value	$ 33,973	$ 289,390
Available for Sale, Less than 12 Months, Unrealized Losses	278	2,446
Available for Sale, 12 Months or Longer, Fair Value	476,622	230,566
Available for Sale, 12 Months or Longer, Unrealized Losses	$ 11,923	$ 5,588
Available for Sale, Number of Securities | Security	220	185
Available for Sale, Total, Fair Value	$ 510,595	$ 519,956
Available for Sale, Total, Unrealized Losses	12,201	8,034
Held to Maturity, Less Than 12 Months, Fair Value	13,971
Held to Maturity, Less Than 12 Months, Unrealized Losses	185
Held to Maturity, 12 Months or Longer, Fair Value	103,507
Held to Maturity, Less Than 12 Months, Unrealized Losses	$ 2,811
Held to Maturity, Number of Securities | Security	72
Held to Maturity, Fair Value	$ 117,478
Held to Maturity, Unrealized Losses	2,996
Obligations of states and political subdivisions
Investment [Line Items]
Available for Sale, Less than 12 Months, Fair Value	1,289	9,612
Available for Sale, Less than 12 Months, Unrealized Losses	2	77
Available for Sale, 12 Months or Longer, Fair Value	26,522	12,970
Available for Sale, 12 Months or Longer, Unrealized Losses	$ 584	$ 340
Available for Sale, Number of Securities | Security	50	39
Available for Sale, Total, Fair Value	$ 27,811	$ 22,582
Available for Sale, Total, Unrealized Losses	586	417
Held to Maturity, Less Than 12 Months, Fair Value	1,764	15,353
Held to Maturity, Less Than 12 Months, Unrealized Losses	8	56
Held to Maturity, 12 Months or Longer, Fair Value	15,580	6,028
Held to Maturity, Less Than 12 Months, Unrealized Losses	$ 320	$ 132
Held to Maturity, Number of Securities | Security	27	23
Held to Maturity, Fair Value	$ 17,344	$ 21,381
Held to Maturity, Unrealized Losses	328	188
Mortgage-backed securities, multifamily
Investment [Line Items]
Available for Sale, Less than 12 Months, Fair Value	1,977	0
Available for Sale, Less than 12 Months, Unrealized Losses	2	0
Available for Sale, 12 Months or Longer, Fair Value	12,911	5,088
Available for Sale, 12 Months or Longer, Unrealized Losses	$ 202	$ 63
Available for Sale, Number of Securities | Security	4	1
Available for Sale, Total, Fair Value	$ 14,888	$ 5,088
Available for Sale, Total, Unrealized Losses	204	63
Held to Maturity, Less Than 12 Months, Fair Value	0	1,935
Held to Maturity, Less Than 12 Months, Unrealized Losses	0	22
Held to Maturity, 12 Months or Longer, Fair Value	1,818	0
Held to Maturity, Less Than 12 Months, Unrealized Losses	$ 35	$ 0
Held to Maturity, Number of Securities | Security	2	2
Held to Maturity, Fair Value	$ 1,818	$ 1,935
Held to Maturity, Unrealized Losses	35	22
Mortgage-backed securities, residential
Investment [Line Items]
Available for Sale, Less than 12 Months, Fair Value	10,119	199,387
Available for Sale, Less than 12 Months, Unrealized Losses	58	1,723
Available for Sale, 12 Months or Longer, Fair Value	316,851	157,739
Available for Sale, 12 Months or Longer, Unrealized Losses	$ 8,785	$ 4,040
Available for Sale, Number of Securities | Security	139	118
Available for Sale, Total, Fair Value	$ 326,970	$ 357,126
Available for Sale, Total, Unrealized Losses	8,843	5,763
Held to Maturity, Less Than 12 Months, Fair Value	8,325	26,090
Held to Maturity, Less Than 12 Months, Unrealized Losses	59	426
Held to Maturity, 12 Months or Longer, Fair Value	53,761	19,203
Held to Maturity, Less Than 12 Months, Unrealized Losses	$ 1,779	$ 552
Held to Maturity, Number of Securities | Security	36	25
Held to Maturity, Fair Value	$ 62,086	$ 45,293
Held to Maturity, Unrealized Losses	1,838	978
U.S. Treasury and U.S. government agencies
Investment [Line Items]
Available for Sale, Less than 12 Months, Fair Value	20,588	80,391
Available for Sale, Less than 12 Months, Unrealized Losses	216	646
Available for Sale, 12 Months or Longer, Fair Value	120,338	54,769
Available for Sale, 12 Months or Longer, Unrealized Losses	$ 2,352	$ 1,145
Available for Sale, Number of Securities | Security	27	27
Available for Sale, Total, Fair Value	$ 140,926	$ 135,160
Available for Sale, Total, Unrealized Losses	2,568	1,791
Held to Maturity, Less Than 12 Months, Fair Value	0	15,371
Held to Maturity, Less Than 12 Months, Unrealized Losses	0	95
Held to Maturity, 12 Months or Longer, Fair Value	32,348	6,720
Held to Maturity, Less Than 12 Months, Unrealized Losses	$ 677	$ 307
Held to Maturity, Number of Securities | Security	6	4
Held to Maturity, Fair Value	$ 32,348	$ 22,091
Held to Maturity, Unrealized Losses	677	402
Debt securities
Investment [Line Items]
Held to Maturity, Less Than 12 Months, Fair Value	3,882	58,749
Held to Maturity, Less Than 12 Months, Unrealized Losses	118	599
Held to Maturity, 12 Months or Longer, Fair Value	0	31,951
Held to Maturity, Less Than 12 Months, Unrealized Losses	$ 0	$ 991
Held to Maturity, Number of Securities | Security	1	54
Held to Maturity, Fair Value	$ 3,882	$ 90,700
Held to Maturity, Unrealized Losses	$ 118	$ 1,590

Loans and Leases and Other Re_3

Loans and Leases and Other Real Estate - Composition of Lakeland`s Loan and Lease Portfolio (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 4,460,447	$ 4,156,680
Less deferred fees	(3,714)	(3,960)
Loans and leases, net of deferred fees	4,456,733	4,152,720
Commercial, secured by real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	3,057,779	2,831,184
Commercial, industrial and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	336,735	340,400
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	87,925	75,039
Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	329,854	322,880
Real estate - construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	319,545	264,908
Home equity and consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 328,609	$ 322,269

Loans and Leases and Other Re_4

Loans and Leases and Other Real Estate - Additional Information (Detail) - USD ($)	Jul. 01, 2016	Jan. 07, 2016	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings included in non accrual loans				$ 3,600,000	$ 2,700,000
Unfunded lending reserve				2,300,000	2,500,000
Loans to these related parties				53,100,000	27,500,000
Loans to these related parties, additions				18,700,000
Repayment of loan from related parties				10,800,000
Mortgages held for sale				1,113,000	456,000
Residential real estate acquired through disclosure				830,000	800,000
Other repossessed assets owned				0	0
Writedown of other repossessed assets				70,000	98,000	$ 0
Federal Home Loan Bank of New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential loans pledged for potential borrowings at the Federal Home Loan Bank of New York				1,200,000,000	1,100,000,000
Residential Property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate acquired through disclosure				702,000	843,000
Pascack Bancorp, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and debt securities acquired with deteriorated credit quality				157,000			$ 127,000
Loans and debt securities acquired with deteriorated credit quality decrease		$ 661,000
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Payments			$ 218,000
Harmony Bank
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and debt securities acquired with deteriorated credit quality				495,000
Loans and debt securities acquired with deteriorated credit quality decrease	$ 274,000
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Payments			$ 247,000
Impaired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest accrued on impaired loans and leases				1,100,000	1,500,000	$ 1,700,000
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Group of impaired loans with recorded investment				500,000
Home equity and consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Overdraft balances included in home equity and consumer loans				452,000	$ 966,000
Residential Mortgages And Consumer Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans that were in process of foreclosure				1,500,000
Related Party Relationships, Commenced Or Ceased During 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans to these related parties, additions				$ 17,700,000

Loans and Leases and Other Re_5

Loans and Leases and Other Real Estate - Schedule of Changes in Accretable Yield (Detail) - Loans Acquired with Deteriorated Credit Quality - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 129	$ 145
Accretion	(182)	(202)
Net reclassification non-accretable difference	134	186
Balance, end of period	$ 81	$ 129

Loans and Leases and Other Re_6

Loans and Leases and Other Real Estate - Lakeland's Non-Accrual Loans and Leases and Its Accruing Troubled Debt Restructurings (TDRs) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans and leases	$ 12,130	$ 13,655
Other real estate and other repossessed assets	830	843
Total non-performing assets	12,960	14,498
Troubled debt restructurings, still accruing	9,293	11,462
Commercial, secured by real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans and leases	7,192	5,890
Commercial, industrial and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans and leases	1,019	184
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans and leases	501	144
Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans and leases	1,986	3,860
Real estate - construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans and leases	0	1,472
Home equity and consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans and leases	$ 1,432	$ 2,105

Loans and Leases and Other Re_7

Loans and Leases and Other Real Estate - Age Analysis of Past Due Loans, Segregated by Class of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 12,179	$ 19,008
Current	4,448,268	4,137,672
Total Loans and Leases	4,460,447	4,156,680
Recorded Investment Greater than 89 Days and Still Accruing	0	200
Commercial, secured by real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,353	8,562
Current	3,053,426	2,822,622
Total Loans and Leases	3,057,779	2,831,184
Recorded Investment Greater than 89 Days and Still Accruing	0	0
Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,166	257
Current	335,569	340,143
Total Loans and Leases	336,735	340,400
Recorded Investment Greater than 89 Days and Still Accruing	0	0
Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,047	779
Current	86,878	74,260
Total Loans and Leases	87,925	75,039
Recorded Investment Greater than 89 Days and Still Accruing	0	0
Real estate - residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,630	4,984
Current	327,224	317,896
Total Loans and Leases	329,854	322,880
Recorded Investment Greater than 89 Days and Still Accruing	0	0
Real estate - construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	1,472
Current	319,545	263,436
Total Loans and Leases	319,545	264,908
Recorded Investment Greater than 89 Days and Still Accruing	0	0
Home equity and consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,983	2,954
Current	325,626	319,315
Total Loans and Leases	328,609	322,269
Recorded Investment Greater than 89 Days and Still Accruing	0	200
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,843	6,436
30-59 Days Past Due | Commercial, secured by real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,477	3,663
30-59 Days Past Due | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	173	80
30-59 Days Past Due | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	533	496
30-59 Days Past Due | Real estate - residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	743	939
30-59 Days Past Due | Real estate - construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
30-59 Days Past Due | Home equity and consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,917	1,258
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,222	2,560
60-89 Days Past Due | Commercial, secured by real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	639	1,082
60-89 Days Past Due | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	243	121
60-89 Days Past Due | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13	139
60-89 Days Past Due | Real estate - residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	111	908
60-89 Days Past Due | Real estate - construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
60-89 Days Past Due | Home equity and consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	216	310
Greater Than 89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,114	10,012
Greater Than 89 Days | Commercial, secured by real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,237	3,817
Greater Than 89 Days | Commercial, industrial and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	750	56
Greater Than 89 Days | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	501	144
Greater Than 89 Days | Real estate - residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,776	3,137
Greater Than 89 Days | Real estate - construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	1,472
Greater Than 89 Days | Home equity and consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 850	$ 1,386

Loans and Leases and Other Re_8

Loans and Leases and Other Real Estate - Impaired Loans with and without Specific Allowances (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Recorded Investment in Impaired Loans	$ 19,702	$ 22,591	$ 25,285
Contractual Unpaid Principal Balance	21,360	23,461	27,356
Loans with related allowance, Related Allowance	338	505
Related Allowance	338	505	529
Interest Income Recognized	592	705	648
Average Investment in Impaired Loans	20,012	23,236	26,675
Commercial, secured by real estate
Financing Receivable, Impaired [Line Items]
Loans without related allowance, Recorded Investment in Impaired Loans	9,284	12,155	12,764
Loans with related allowance, Recorded Investment in Impaired Loans	7,270	5,381	5,860
Recorded Investment in Impaired Loans	16,554	17,536	18,624
Loans without related allowance, Contractual Unpaid Principal Balance	9,829	12,497	13,195
Loans with related allowance, Contractual Unpaid Principal Balance	7,597	5,721	6,142
Contractual Unpaid Principal Balance	17,426	18,218	19,337
Loans with related allowance, Related Allowance	307	454	392
Related Allowance	307	454	392
Loans without related allowance, Interest Income Recognized	188	366	229
Loans with related allowance, Interest Income Recognized	317	206	273
Interest Income Recognized	505	572	502
Loans without related allowance, Average Investment in Impaired Loans	7,369	12,774	13,631
Loans with related allowance, Average Investment in Impaired Loans	7,594	5,029	6,549
Average Investment in Impaired Loans	14,963	17,803	20,180
Commercial, industrial and other
Financing Receivable, Impaired [Line Items]
Loans without related allowance, Recorded Investment in Impaired Loans	1,151	618	603
Loans with related allowance, Recorded Investment in Impaired Loans	209	164	349
Recorded Investment in Impaired Loans	1,360	782	952
Loans without related allowance, Contractual Unpaid Principal Balance	1,449	618	603
Loans with related allowance, Contractual Unpaid Principal Balance	209	164	349
Contractual Unpaid Principal Balance	1,658	782	952
Loans with related allowance, Related Allowance	7	9	12
Related Allowance	7	9	12
Loans without related allowance, Interest Income Recognized	19	25	24
Loans with related allowance, Interest Income Recognized	12	14	17
Interest Income Recognized	31	39	41
Loans without related allowance, Average Investment in Impaired Loans	1,834	618	1,109
Loans with related allowance, Average Investment in Impaired Loans	209	283	360
Average Investment in Impaired Loans	2,043	901	1,469
Leases
Financing Receivable, Impaired [Line Items]
Loans without related allowance, Recorded Investment in Impaired Loans	301	0	0
Loans with related allowance, Recorded Investment in Impaired Loans	30	65	0
Recorded Investment in Impaired Loans	331	65	0
Loans without related allowance, Contractual Unpaid Principal Balance	597	0	0
Loans with related allowance, Contractual Unpaid Principal Balance	30	65	0
Contractual Unpaid Principal Balance	627	65	0
Loans with related allowance, Related Allowance	14	30	0
Related Allowance	14	30	0
Loans without related allowance, Interest Income Recognized	0	0	0
Loans with related allowance, Interest Income Recognized	0	0	0
Interest Income Recognized	0	0	0
Loans without related allowance, Average Investment in Impaired Loans	376	0	0
Loans with related allowance, Average Investment in Impaired Loans	19	29	1
Average Investment in Impaired Loans	395	29	1
Real estate - residential mortgage
Financing Receivable, Impaired [Line Items]
Loans without related allowance, Recorded Investment in Impaired Loans	0	963	1,880
Loans with related allowance, Recorded Investment in Impaired Loans	730	781	1,031
Recorded Investment in Impaired Loans	730	1,744	2,911
Loans without related allowance, Contractual Unpaid Principal Balance	0	980	3,146
Loans with related allowance, Contractual Unpaid Principal Balance	884	919	1,100
Contractual Unpaid Principal Balance	884	1,899	4,246
Loans with related allowance, Related Allowance	4	4	31
Related Allowance	4	4	31
Loans without related allowance, Interest Income Recognized	4	15	16
Loans with related allowance, Interest Income Recognized	20	27	30
Interest Income Recognized	24	42	46
Loans without related allowance, Average Investment in Impaired Loans	242	996	2,430
Loans with related allowance, Average Investment in Impaired Loans	745	940	1,011
Average Investment in Impaired Loans	987	1,936	3,441
Real estate - construction
Financing Receivable, Impaired [Line Items]
Loans without related allowance, Recorded Investment in Impaired Loans	0	1,471	1,471
Loans with related allowance, Recorded Investment in Impaired Loans	0	0	0
Recorded Investment in Impaired Loans	0	1,471	1,471
Loans without related allowance, Contractual Unpaid Principal Balance	0	1,471	1,471
Loans with related allowance, Contractual Unpaid Principal Balance	0	0	0
Contractual Unpaid Principal Balance	0	1,471	1,471
Loans with related allowance, Related Allowance	0	0	0
Related Allowance	0	0	0
Loans without related allowance, Interest Income Recognized	0	0	0
Loans with related allowance, Interest Income Recognized	0	0	0
Interest Income Recognized	0	0	0
Loans without related allowance, Average Investment in Impaired Loans	726	1,471	12
Loans with related allowance, Average Investment in Impaired Loans	0	0	0
Average Investment in Impaired Loans	726	1,471	12
Home equity and consumer
Financing Receivable, Impaired [Line Items]
Loans without related allowance, Recorded Investment in Impaired Loans	0	0	139
Loans with related allowance, Recorded Investment in Impaired Loans	727	993	1,188
Recorded Investment in Impaired Loans	727	993	1,327
Loans without related allowance, Contractual Unpaid Principal Balance	0	0	139
Loans with related allowance, Contractual Unpaid Principal Balance	765	1,026	1,211
Contractual Unpaid Principal Balance	765	1,026	1,350
Loans with related allowance, Related Allowance	6	8	94
Related Allowance	6	8	94
Loans without related allowance, Interest Income Recognized	0	0	0
Loans with related allowance, Interest Income Recognized	32	52	59
Interest Income Recognized	32	52	59
Loans without related allowance, Average Investment in Impaired Loans	0	6	388
Loans with related allowance, Average Investment in Impaired Loans	898	1,090	1,184
Average Investment in Impaired Loans	$ 898	$ 1,096	$ 1,572

Loans and Leases and Other Re_9

Loans and Leases and Other Real Estate - Lakeland 's Commercial Loan Portfolio (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 4,419,045	$ 4,117,265
Commercial, secured by real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,057,779	2,831,184
Commercial, secured by real estate | 1
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial, secured by real estate | 2
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial, secured by real estate | 3
Financing Receivable, Recorded Investment [Line Items]
Total loans	69,995	76,824
Commercial, secured by real estate | 4
Financing Receivable, Recorded Investment [Line Items]
Total loans	933,577	862,537
Commercial, secured by real estate | 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,910,423	1,779,908
Commercial, secured by real estate | 5W - Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	61,626	47,178
Commercial, secured by real estate | 6 - Other assets especially mentioned
Financing Receivable, Recorded Investment [Line Items]
Total loans	38,844	40,245
Commercial, secured by real estate | 7 - Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	43,314	24,492
Commercial, secured by real estate | 8 - Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial, secured by real estate | 9 - Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial, industrial and other
Financing Receivable, Recorded Investment [Line Items]
Total loans	336,735	340,400
Commercial, industrial and other | 1
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,119	392
Commercial, industrial and other | 2
Financing Receivable, Recorded Investment [Line Items]
Total loans	18,462	26,968
Commercial, industrial and other | 3
Financing Receivable, Recorded Investment [Line Items]
Total loans	36,367	35,950
Commercial, industrial and other | 4
Financing Receivable, Recorded Investment [Line Items]
Total loans	91,145	96,426
Commercial, industrial and other | 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	168,474	150,928
Commercial, industrial and other | 5W - Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,798	8,779
Commercial, industrial and other | 6 - Other assets especially mentioned
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,033	8,670
Commercial, industrial and other | 7 - Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,337	12,287
Commercial, industrial and other | 8 - Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial, industrial and other | 9 - Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Real estate - construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	319,545	264,908
Real estate - construction | 1
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Real estate - construction | 2
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Real estate - construction | 3
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Real estate - construction | 4
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,375	15,502
Real estate - construction | 5
Financing Receivable, Recorded Investment [Line Items]
Total loans	297,625	246,806
Real estate - construction | 5W - Watch
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,493	0
Real estate - construction | 6 - Other assets especially mentioned
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Real estate - construction | 7 - Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,052	2,600
Real estate - construction | 8 - Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Real estate - construction | 9 - Loss
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0

Loans and Leases and Other R_10

Loans and Leases and Other Real Estate - Allowance for Loan and Lease Losses by Portfolio Segment and Related Recorded Investment in Loans and Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 35,455	$ 31,245
Charge-offs	(3,347)	(3,446)
Recoveries	1,167	1,566
Provision	4,413	6,090	$ 4,223
Ending balance: Individually evaluated for impairment	338	505
Ending balance	37,688	35,455	31,245
Ending balance: Collectively evaluated for impairment	37,350	34,950
Loans and Leases
Total Loans and Leases	4,460,447	4,156,680
Loans and Leases
Loans and Leases
Ending balance: Individually evaluated for impairment	19,702	22,591
Ending balance: Collectively evaluated for impairment	4,440,093	4,133,379
Total Loans and Leases	4,460,447	4,156,680
Loans and Leases | Loans Acquired with Deteriorated Credit Quality
Loans and Leases
Ending balance: Loans acquired with deteriorated credit quality	652	710
Commercial, secured by real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	25,704	21,223
Charge-offs	(421)	(762)
Recoveries	468	396
Provision	2,130	4,847
Ending balance: Individually evaluated for impairment	307	454	392
Ending balance	27,881	25,704	21,223
Ending balance: Collectively evaluated for impairment	27,574	25,250
Loans and Leases
Total Loans and Leases	3,057,779	2,831,184
Commercial, secured by real estate | Loans and Leases
Loans and Leases
Ending balance: Individually evaluated for impairment	16,554	17,536
Ending balance: Collectively evaluated for impairment	3,040,573	2,812,941
Total Loans and Leases	3,057,779	2,831,184
Commercial, secured by real estate | Loans and Leases | Loans Acquired with Deteriorated Credit Quality
Loans and Leases
Ending balance: Loans acquired with deteriorated credit quality	652	707
Commercial, industrial and other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,313	1,723
Charge-offs	(1,452)	(477)
Recoveries	317	172
Provision	564	895
Ending balance: Individually evaluated for impairment	7	9	12
Ending balance	1,742	2,313	1,723
Ending balance: Collectively evaluated for impairment	1,735	2,304
Loans and Leases
Total Loans and Leases	336,735	340,400
Commercial, industrial and other | Loans and Leases
Loans and Leases
Ending balance: Individually evaluated for impairment	1,360	782
Ending balance: Collectively evaluated for impairment	335,375	339,618
Total Loans and Leases	336,735	340,400
Commercial, industrial and other | Loans and Leases | Loans Acquired with Deteriorated Credit Quality
Loans and Leases
Ending balance: Loans acquired with deteriorated credit quality	0	0
Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	630	548
Charge-offs	(507)	(305)
Recoveries	23	59
Provision	841	328
Ending balance: Individually evaluated for impairment	14	30	0
Ending balance	987	630	548
Ending balance: Collectively evaluated for impairment	973	600
Loans and Leases
Total Loans and Leases	87,925	75,039
Leases | Loans and Leases
Loans and Leases
Ending balance: Individually evaluated for impairment	331	65
Ending balance: Collectively evaluated for impairment	87,594	74,974
Total Loans and Leases	87,925	75,039
Leases | Loans and Leases | Loans Acquired with Deteriorated Credit Quality
Loans and Leases
Ending balance: Loans acquired with deteriorated credit quality	0	0
Real estate - residential mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,557	1,964
Charge-offs	(131)	(441)
Recoveries	10	5
Provision	130	29
Ending balance: Individually evaluated for impairment	4	4	31
Ending balance	1,566	1,557	1,964
Ending balance: Collectively evaluated for impairment	1,562	1,553
Loans and Leases
Total Loans and Leases	329,854	322,880
Real estate - residential mortgage | Loans and Leases
Loans and Leases
Ending balance: Individually evaluated for impairment	730	1,744
Ending balance: Collectively evaluated for impairment	329,124	321,136
Total Loans and Leases	329,854	322,880
Real estate - residential mortgage | Loans and Leases | Loans Acquired with Deteriorated Credit Quality
Loans and Leases
Ending balance: Loans acquired with deteriorated credit quality	0	0
Real estate - construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,731	2,352
Charge-offs	(248)	(609)
Recoveries	17	31
Provision	515	957
Ending balance: Individually evaluated for impairment	0	0	0
Ending balance	3,015	2,731	2,352
Ending balance: Collectively evaluated for impairment	3,015	2,731
Loans and Leases
Total Loans and Leases	319,545	264,908
Real estate - construction | Loans and Leases
Loans and Leases
Ending balance: Individually evaluated for impairment	0	1,471
Ending balance: Collectively evaluated for impairment	319,545	263,437
Total Loans and Leases	319,545	264,908
Real estate - construction | Loans and Leases | Loans Acquired with Deteriorated Credit Quality
Loans and Leases
Ending balance: Loans acquired with deteriorated credit quality	0	0
Home equity and consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,520	3,435
Charge-offs	(588)	(852)
Recoveries	332	903
Provision	233	(966)
Ending balance: Individually evaluated for impairment	6	8	94
Ending balance	2,497	2,520	$ 3,435
Ending balance: Collectively evaluated for impairment	2,491	2,512
Loans and Leases
Total Loans and Leases	328,609	322,269
Home equity and consumer | Loans and Leases
Loans and Leases
Ending balance: Individually evaluated for impairment	727	993
Ending balance: Collectively evaluated for impairment	327,882	321,273
Total Loans and Leases	328,609	322,269
Home equity and consumer | Loans and Leases | Loans Acquired with Deteriorated Credit Quality
Loans and Leases
Ending balance: Loans acquired with deteriorated credit quality	$ 0	$ 3

Loans and Leases and Other R_11

Loans and Leases and Other Real Estate - Summary of Restructured Loans (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)Contract	Dec. 31, 2017USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	7	16
Pre- Modification Outstanding Recorded Investment	$ 4,313	$ 4,807
Post- Modification Outstanding Recorded Investment	$ 4,313	$ 4,807
Commercial, secured by real estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	5	8
Pre- Modification Outstanding Recorded Investment	$ 3,348	$ 4,618
Post- Modification Outstanding Recorded Investment	$ 3,348	$ 4,618
Commercial, industrial and other
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	2
Pre- Modification Outstanding Recorded Investment	$ 950	$ 124
Post- Modification Outstanding Recorded Investment	$ 950	$ 124
Leases
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	6
Pre- Modification Outstanding Recorded Investment	$ 15	$ 65
Post- Modification Outstanding Recorded Investment	$ 15	$ 65

Loans and Leases and Other R_12

Loans and Leases and Other Real Estate - Summary of Restructured Loans within Previous 12 Months that have Subsequently Defaulted (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)Contract	Dec. 31, 2017USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	2
Recorded Investment | $	$ 171	$ 35
Commercial, secured by real estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	0
Recorded Investment | $	$ 171	$ 0
Leases
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	2
Recorded Investment | $	$ 0	$ 35

Loans and Leases and Other R_13

Loans and Leases and Other Real Estate - Summary of Future Minimum Lease Payments of Lease Receivables (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Receivables [Abstract]
2,018	$ 30,384
2,019	24,297
2,020	18,089
2,021	10,814
2,022	3,969
Thereafter	372
Total	$ 87,925

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Land	$ 10,471	$ 10,626
Buildings and building improvements	47,006	46,985
Leasehold improvements	12,880	12,953
Furniture, fixtures and equipment	27,858	26,923
Premises and equipment, gross	98,215	97,487
Less accumulated depreciation and amortization	49,040	47,174
Premises and equipment	$ 49,175	$ 50,313
Buildings and building improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Buildings and building improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	50 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years

Premises and Equipment - Additi

Premises and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 5.3	$ 5	$ 5

Time Deposits - Schedule of Mat

Time Deposits - Schedule of Maturities of Certificates of Deposit (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
2,019	$ 568,350
2,020	108,881
2,021	35,698
2,022	41,235
2,023	2,874
Total	$ 757,038	$ 737,428

Debt - Additional Information (

Debt - Additional Information (Short Term Debt) (Detail) - Line of Credit - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Overnight federal funds borrowed	$ 192,100,000	$ 80,000,000
Overnight federal funds lines available for borrow	210,000,000
Federal Home Loan Bank of New York
Short-term Debt [Line Items]
Overnight borrowings	0	0
Borrowings with the Federal Reserve Bank of New York		$ 0
Federal Reserve Bank of New York
Short-term Debt [Line Items]
Borrowings with the Federal Reserve Bank	$ 0

Debt - Summary of Information R

Debt - Summary of Information Relating to Securities Sold Under Agreements to Repurchase and Federal Funds Purchased (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal Funds Purchased
Short-term Debt [Line Items]
Balance at December 31,	$ 192,064	$ 80,000	$ 32,000
Interest rate at December 31,	2.88%	1.71%	0.85%
Maximum amount outstanding at any month-end during the year	$ 214,165	$ 168,784	$ 133,434
Average amount outstanding during the year	$ 21,338	$ 13,264	$ 8,708
Weighted average interest rate during the year	2.03%	1.42%	0.71%
Securities Sold Under Agreements to Repurchase
Short-term Debt [Line Items]
Balance at December 31,	$ 41,841	$ 44,936	$ 24,354
Interest rate at December 31,	0.26%	0.02%	0.02%
Maximum amount outstanding at any month-end during the year	$ 50,526	$ 44,936	$ 32,872
Average amount outstanding during the year	$ 32,435	$ 28,480	$ 27,535
Weighted average interest rate during the year	0.12%	0.03%	0.03%

Debt - Additional Information_2

Debt - Additional Information (Long Term Debt) (Detail)	Aug. 03, 2015USD ($)	May 31, 2007USD ($)shares	Jun. 30, 2003USD ($)shares	Jun. 30, 2018USD ($)	Mar. 31, 2017USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jun. 30, 2016USD ($)Derivative
Debt Instrument [Line Items]
Advances from the FHLB							$ 181,118,000	$ 172,000,000
Long-term debt prepayment fee							0	2,828,000	$ 0
Securities sold under agreement to repurchase maturities due							$ 0	$ 20,000,000
Repayments of long-term debt				$ 20,000,000
Cash Flow Hedging | Interest Rate Swaps
Debt Instrument [Line Items]
Debt instrument, face amount										$ 30,000,000
Debt instrument, description of variable rate basis							3 month LIBOR
Number of derivatives | Derivative										2
Short Term and Long Term Mortgage Backed Securities Sold Under Agreements To Repurchase
Debt Instrument [Line Items]
Pledged securities							$ 57,700,000
Federal Home Loan Bank of New York
Debt Instrument [Line Items]
Repayments of debt					$ 34,000,000
Long-term debt prepayment fee					638,000
Federal Home Loan Bank of New York | Maximum
Debt Instrument [Line Items]
Maturity of advances from the FHLB							5 years	4 years
Collateralized FHLB Advances | Weighted Average
Debt Instrument [Line Items]
Weighted average interest rate of advances							2.10%	1.69%
Debt Securities Sold under Agreements to Repurchase
Debt Instrument [Line Items]
Repayments of debt					20,000,000
Long-term debt prepayment fee					$ 2,200,000
Weighted average interest rate of advances								2.25%
Junior Subordinated Debt | Lakeland Bancorp Capital Trust IV
Debt Instrument [Line Items]
Debt instrument, face amount		$ 20,600,000
Debt instrument, maturity date		Aug. 31, 2037
Debt instrument, basis point		1.52%
Distribution rate on securities		6.61%
Distribution of securities years		5 years
Trust preferred securities, issued | shares		20,000
Trust preferred securities, face value		$ 1,000
Proceeds of trust preferred securities, Total		$ 20,000,000
Preferred securities redeemed							2,037
Gain on extinguishment of debt	$ 1,800,000
Debentures extinguished	$ 10,000,000
Junior Subordinated Debt | Lakeland Bancorp Capital II
Debt Instrument [Line Items]
Debt instrument, face amount			$ 20,600,000
Debt instrument, maturity date							Jun. 30, 2033
Debt instrument, basis point			3.10%
Distribution rate on securities			5.71%
Distribution of securities years			5 years
Trust preferred securities, issued | shares			20,000
Trust preferred securities, face value			$ 1,000
Proceeds of trust preferred securities, Total			$ 20,000,000
Preferred securities redeemed							2,033
Subordinated Debenture Offering | Fixed To Floating
Debt Instrument [Line Items]
Debt instrument, offering date							Sep. 30, 2016
Debt instrument, face amount						$ 75,000,000
Debt instrument, maturity date							Sep. 30, 2026
Debt instrument, interest rate						5.125%
Debt instrument, interest rate repricing date							Sep. 30, 2021
Debt issuance costs							$ 1,500,000
Subordinated Debenture Offering | Fixed To Floating | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis point						3.97%
Debt instrument, description of variable rate basis							Three-month LIBOR

Debt - Summary of FHLB Debt Mat

Debt - Summary of FHLB Debt Matures (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 40,264
2,020	55,880
2,021	44,971
2,022	15,566
2,023	24,437
Total	$ 181,118	$ 172,000

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Dec. 14, 2016	Jul. 01, 2016	Jan. 07, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Common stock, net proceeds				$ 0	$ 0	$ 48,678
Harmony Bank
Class of Stock [Line Items]
Consideration paid through common stock		3,201,109
Consideration price per share (usd per share)		$ 14.31
Closing stock price per share		11.45
Shares to receive by the acquiree at the time of merger				1.25
Average strike price (usd per share)		$ 9.07
Cash paid in connection with cancellation of the old stock options		$ 869
Pascack Bancorp, Inc.
Class of Stock [Line Items]
Consideration paid through common stock			3,314,284
Consideration price per share (usd per share)			$ 11.35
Average strike price (usd per share)			$ 7.37
Cash paid for acquisition			$ 4,500
Cash paid in connection with cancellation of the old stock options			$ 122
At-the-market Common Stock Issuance
Class of Stock [Line Items]
Common stock sold	2,739,650
Common stock, weighted average price (usd per share)	$ 18.25
Common stock, gross proceeds	$ 50,000
Common stock, net proceeds	$ 48,700

Income Taxes - Components of In

Income Taxes - Components of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current tax provision	$ 30,459	$ 10,565	$ 22,308
Deferred tax (benefit) expense	(13,571)	16,904	(987)
Total provision for income taxes	$ 16,888	$ 27,469	$ 21,321

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 01, 2018
Income Tax Disclosure [Line Items]
Unrealized losses on securities available for sale	$ 17,189,000	$ 2,857,000
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset, income tax expense (benefit)	1,300,000
Excise tax on real estate investment trust (REIT) dividend	$ 0	1,945,000	$ 0
Effective income tax rate reconciliation, change in enacted tax rate and excise tax on real estate investment trust dividend, amount		$ 602,000
Statutory federal rate	21.00%	35.00%	35.00%
Unrecognized tax benefits	$ 0	$ 0
Income tax penalties and interest expense	$ 0	$ 0
New Jersey Division of Taxation [Member] | State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Unrealized losses on securities available for sale				$ 943,000

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Tax Provision Reconciled to Income Taxes that Computed at Statutory Federal Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal income tax, at statutory rates	$ 16,861	$ 28,017	$ 21,994
Increase (deduction) in taxes resulting from:
Tax-exempt income	(1,096)	(1,652)	(1,671)
Excise tax on real estate investment trust (REIT) dividend	0	1,945	0
Adjustment to net deferred tax asset for Tax Cuts and Jobs Act	0	(1,343)	0
State income tax, net of federal income tax effect	1,880	931	552
Adjustment to net deferred tax asset for change in NJ tax law	(943)	0	0
Excess tax benefits from employee share-based payments	(318)	(587)	0
Other, net	504	158	446
Total provision for income taxes	$ 16,888	$ 27,469	$ 21,321

Income Taxes - Summary of Net D

Income Taxes - Summary of Net Deferred Tax Asset (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for loan and lease losses	$ 11,651	$ 10,662
Stock based compensation plans	865	769
Purchase accounting fair market value adjustments	1,192	1,441
Non-accrued interest	256	394
Deferred compensation	2,142	2,007
Depreciation and amortization	630	805
Other-than-temporary impairment loss on investment securities	59	77
Unrealized losses on securities available for sale	3,162	1,108
Other, net	585	675
Gross deferred tax assets	20,542	17,938
Deferred tax liabilities:
Core deposit intangible from acquired companies	516	664
Undistributed income from subsidiary not consolidated for tax return purposes (REIT)	149	12,015
Deferred loan costs	1,418	1,169
Prepaid expenses	459	524
Deferred gain on securities	166	116
Unfunded pension benefits	17	7
Loss on equity securities	36	0
Unrealized gains on hedging derivative	322	229
Other	270	357
Gross deferred tax liabilities	3,353	15,081
Net deferred tax assets	$ 17,189	$ 2,857

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail)	1 Months Ended			12 Months Ended
	Mar. 31, 2015	Feb. 28, 2015USD ($)	Nov. 30, 2008USD ($)	Dec. 31, 2018USD ($)Installments	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2008USD ($)	Dec. 31, 2003USD ($)
Defined Benefit Plan Disclosure [Line Items]
Company's contributions to employees salary				$ 1,100,000	$ 1,000,000	$ 911,000
Employees contributions to their annual salary				50.00%
Percent of match				6.00%
Profit Sharing Plan
Defined Benefit Plan Disclosure [Line Items]
Company's contributions to employees salary				$ 0	0	600,000
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Annual retirement benefit			$ 90,000			$ 84,500		$ 150,000	$ 150,000
Retirement benefit period			10 years			15 years		15 years	15 years
Compensation expense				83,000	261,000	$ 746,000
Retirement age of CEO			65 years			66 years		65 years	65 years
Accrued liabilities				3,300,000	3,500,000
Supplemental Employee Retirement Plan | Somerset Hills Bancorp
Defined Benefit Plan Disclosure [Line Items]
Retirement benefit period							15 years
Employee benefit plan liability				629,000	702,000
Compensation expense				(1,000)	33,000	$ 0
Supplemental Employee Retirement Plan | Somerset Hills Bancorp | CEO
Defined Benefit Plan Disclosure [Line Items]
Annual retirement benefit							$ 48,000
Supplemental Employee Retirement Plan | Somerset Hills Bancorp | Chief Financial Officer
Defined Benefit Plan Disclosure [Line Items]
Annual retirement benefit							$ 24,000
Deferred Compensation Agreement
Defined Benefit Plan Disclosure [Line Items]
Expense related to the deferred compensation plan				269,000	244,000	222,000,000
Accrued liability on deferred compensation plans				$ 923,000	654,000
Deferred Compensation Agreement | CEO
Defined Benefit Plan Disclosure [Line Items]
Employer monthly contribution		$ 16,500
Number of consecutive installments payments | Installments				180
Deferred Compensation Agreement | Minimum | CEO
Defined Benefit Plan Disclosure [Line Items]
Range of return on equity		0.00%
Deferred Compensation Agreement | Maximum | CEO
Defined Benefit Plan Disclosure [Line Items]
Range of return on equity		15.00%
Elective Deferral Plan
Defined Benefit Plan Disclosure [Line Items]
Expense related to the deferred compensation plan				$ 73,000	55,000	$ 22,000,000
Accrued liability on deferred compensation plans				$ 1,400,000	$ 916,000
Elective Deferral Plan | Eligible Executives
Defined Benefit Plan Disclosure [Line Items]
Deferral account, interest rate	75.00%
Elective Deferral Plan | Minimum | Eligible Executives
Defined Benefit Plan Disclosure [Line Items]
Range of return on equity	0.00%
Elective Deferral Plan | Maximum | Eligible Executives
Defined Benefit Plan Disclosure [Line Items]
Range of return on equity	15.00%

Directors Retirement Plan - Add

Directors Retirement Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Minimum period of service for retirement	5 years
Maximum payment period for benefits	10 years
Director's Retirement Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Discount rate of directors retirement plan	3.97%	3.30%	3.68%
Plan assets of director's retirement plan	$ 0
Contribution to the director's retirement plan	57,000
Minimum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Remuneration rate for board of directors	5,000
Maximum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Remuneration rate for board of directors	$ 17,500

Directors Retirement Plan - Sta

Directors Retirement Plan - Status of Directors Retirement Plan (Detail) - Director - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Accrued plan cost included in other liabilities	$ 604	$ 673
Recognized in accumulated other comprehensive income
Net actuarial gain	(29)	28
Unrecognized prior service cost	0	0
Amounts not recognized as a component of net postretirement benefit (benefit)	$ (29)	$ 28

Directors Retirement Plan - Com

Directors Retirement Plan - Components of Net Periodic Plan Cost for Retirement Plan (Detail) - Director's Retirement Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net periodic plan cost included the following components:
Service cost	$ 15	$ 21	$ 19
Interest cost	20	23	26
Amortization of prior service cost	0	3	12
Net periodic postretirement cost	$ 35	$ 47	$ 57

Directors Retirement Plan - Ben

Directors Retirement Plan - Benefits Expected to be Paid (Detail) - Director $ in Thousands	Dec. 31, 2018USD ($)
Defined Benefit Plan Disclosure [Line Items]
2,019	$ 57
2,020	63
2,021	37
2,022	38
2,023	38
2024 - 2028	$ 235

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	0
Options outstanding (in shares)	67,488	102,216
Excess tax benefits	$ 318,000	$ 587,000	$ 0
Excess tax benefits	0	0	43,000
Share-based compensation expense	2,425,000	2,325,000	1,899,000
Aggregate intrinsic value of options exercised	406,000	337,000
Exercise of stock options	307,000	321,000	285,000
Fair value of options vested	$ 0	$ 35,000
Two Thousand And Eighteen Omnibus Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, common stock, shares authorized (in shares)	2,000,000
Number of shares available for grant (in shares)	1,100,000
2009 Equity Compensation Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation, common stock, shares authorized (in shares)	2,300,000
Expiration period of stock option plan	10 years
Number of shares available for grant (in shares)	0
Somerset Hills' Stock Option Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	12,296	20,774
Non Vested Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)	0
Vested in period (in shares)	0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0	$ 14,000	35,000
Stock Options | 2009 Equity Compensation Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	3,000
Share-based compensation expense	237,000	$ 287,000	$ 353,000
Fair value of options vested	$ 331,000
Granted (usd per share)	$ 20.30
Unrecognized compensation expense, period of recognition	18 days
Granted (in shares)	11,575
Restricted Stock | 2009 Equity Compensation Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	11,575	13,176	23,952
Granted (usd per share)	$ 20.30	$ 18.20	$ 10.02
Vesting period	1 year	1 year
Allocated share based compensation expense	$ 235,000	$ 240,000	$ 240,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (usd per share)	$ 19.09
Granted (in shares)	159,233
RSUs | 2009 Equity Compensation Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 2,500,000
Granted (usd per share)	$ 19.09	$ 19.92	$ 10.45
Vesting period	3 years	3 years	3 years
Allocated share based compensation expense	$ 2,200,000	$ 2,000,000	$ 1,500,000
Share-based compensation expense	$ 1,000,000	$ 880,000	$ 630,000
Unrecognized compensation expense, period of recognition	1 year 2 months 12 days
Granted (in shares)	159,233	132,523	180,926
RSUs | 2009 Equity Compensation Program | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years	2 years
RSUs | 2009 Equity Compensation Program | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years	3 years
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)		81,442
Director | Somerset Hills' Stock Option Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	55,192

Stock-Based Compensation - Opti

Stock-Based Compensation - Option Activity under the Company's Stock Option Plans (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number of Shares
Balance at beginning of period	102,216
Granted	0
Exercised	(34,728)
Expired	0
Forfeited	0
Balance at end of period	67,488	102,216
Options exercisable at year-end	67,488
Weighted Average Exercise Price
Balance beginning of period	$ 8.49
Granted	0
Exercised	8.84
Expired	0
Forfeited	0
Balance end of period	8.28	$ 8.49
Options exercisable at year-end	$ 8.28
Outstanding, Weighted average remaining contractual term (in years), Ending balance	2 years 10 months 10 days	4 years 3 months 7 days
Options exercisable, Weighted average remaining contractual term (in years), Ending balance	2 years 10 months 10 days
Outstanding, Aggregate intrinsic value	$ 440,483	$ 1,101,806
Options exercisable at year end, Aggregate intrinsic value	$ 440,483

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Company's Restricted Stock Activity (Detail)	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance at beginning of period | shares	22,982
Granted | shares	11,575
Vested | shares	(22,856)
Balance at end of period | shares	11,701
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Balance at beginning of period | $ / shares	$ 14.44
Granted | $ / shares	20.30
Vested | $ / shares	14.46
Balance of end of period | $ / shares	$ 20.18
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance at beginning of period | shares	267,732
Granted | shares	159,233
Vested | shares	(119,421)
Forfeited | shares	(8,197)
Balance at end of period | shares	299,347
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Balance at beginning of period | $ / shares	$ 13.93
Granted | $ / shares	19.09
Vested | $ / shares	13.76
Forfeited | $ / shares	18.99
Balance of end of period | $ / shares	$ 16.60

Revenue Recognition (Details)

Revenue Recognition (Details)	12 Months Ended
	Dec. 31, 2018SegmentRegion
Revenue from Contract with Customer [Abstract]
Number of Geographic Regions | Region	1
Number of operating segments | Segment	1

Revenue Recognition Disaggregat

Revenue Recognition Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Debit card interchange income	$ 5,150	$ 4,474	$ 4,086
Overdraft Fees	3,938	4,656	4,763
ATM Service Fees	830	808	705
Demand Deposit Fees and Charges	540	679	546
Savings Service Fees	126	123	57
Total	10,584	10,740	10,157
Loan and lease fees	1,264	1,136	1,198
Wire Transfer Charges	1,093	1,005	914
Investment services income	1,314	1,045	973
Merchant fees	784	718	444
Commissions from sales of checks	434	457	448
Safe deposit income	371	269	247
Other income	264	202	96
Total	5,524	4,832	4,320
Gains on sales of loans	1,329	1,836	2,123
Gains on customer swap transactions	1,992	982	1,056
Title insurance income	195	200	142
Other income	295	518	431
Total	2,482	1,700	1,629
Revenue not from contracts with customers	2,391	6,327	3,101
TOTAL NONINTEREST INCOME	22,310	25,435	21,330
Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Timing of Revenue Recognition	19,844	19,040	18,192
Products and services transferred over time
Disaggregation of Revenue [Line Items]
Timing of Revenue Recognition	$ 75	$ 68	$ 37

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Rent expense under long-term operating leases	$ 3,000	$ 3,100	$ 3,200
Rent expense to related parties	$ 144	$ 144	$ 141

Commitments and Contingencies_2

Commitments and Contingencies - Aggregate Future Minimum Commitments of Lease Payments (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,019	$ 3,191
2,020	3,055
2,021	2,866
2,022	2,572
2,023	2,233
Thereafter	14,642
Total	$ 28,559

Financial Instruments with Of_3

Financial Instruments with Off-Balance-Sheet Risk and Concentrations of Credit Risk - Summary of Approximate Contract Amounts of Collateral or Other Security to Support Financial Instruments with Credit Risk (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Standby letters of credit and financial guarantees written
Schedule Of Financial Instruments With Off Balance Sheet Credit Risk [Line Items]
Financial instruments with off-balance sheet risks, contract amount	$ 21,585	$ 14,832
Commitments to extend credit
Schedule Of Financial Instruments With Off Balance Sheet Credit Risk [Line Items]
Financial instruments with off-balance sheet risks, contract amount	$ 973,709	$ 966,441

Financial Instruments with Of_4

Financial Instruments with Off-Balance-Sheet Risk and Concentrations of Credit Risk - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Financial Instruments With Off Balance Sheet Credit Risk [Line Items]
Commitments to lend additional funds to borrowers	$ 808	$ 20
Standby letters of credit	$ 21,600
Expiry of letters of credit	2,024
Loan and lease commitments	$ 973,700
Loan and lease commitments maturing within one year	667,900
Maturing after one year but within three years	135,500
Maturing after three years but within five years	19,100
Maturing after five years	151,200
Letters of credit maturing after one year but within three years	444
Standby letters of credit maturing within one year	21,100
Letters of credit maturing after three year but within five years	0
Letters of credit maturing after five years	80
Maximum
Schedule Of Financial Instruments With Off Balance Sheet Credit Risk [Line Items]
Standby letters of credit	$ 21,600

Comprehensive Income (Loss) - C

Comprehensive Income (Loss) - Components of Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Unrealized gains (losses) on available for sale securities
Unrealized holding gains (losses) arising during period, Before Tax Amount	$ (4,241)	$ (1,406)	$ (1,816)
Reclassification adjustment for net gains realized in net income, Before Tax Amount	0	(2,524)	(370)
Net unrealized gains (losses) on available for sale securities, Before Tax Amount	(4,241)	(3,930)	(2,186)
Unrealized gain on derivatives, Before Tax Amount	9	57	1,033
Change in pension liabilities, Before Tax Amount	29	(27)	70
Other comprehensive income (loss), net, Before Tax Amount	(4,203)	(3,900)	(1,083)
Unrealized holding gains (losses) arising during period, Tax benefit (Expense)	734	503	778
Reclassification adjustment for net gains realized in net income, (Expense)	0	884	137
Net unrealized gains (losses) on available for sale securities, Tax Benefit (Expense)	734	1,387	915
Unrealized gain on derivatives, Tax Benefit (Expense)	32	(20)	(361)
Change in pension liabilities, Tax Benefit (Expense)	(9)	11	(28)
Other comprehensive income (loss), net, Tax Benefit (Expense)	757	1,378	526
Unrealized holding gains (losses) arising during period, Net of Tax Amount	(3,507)	(903)	(1,038)
Reclassification adjustment for net gains realized in net income, Net of Tax Amount	0	(1,640)	(233)
Net unrealized gains (losses) on available for sale securities, Net of Tax Amount	(3,507)	(2,543)	(1,271)
Unrealized gain on derivatives, Net of Tax Amount	41	37	672
Change in pension liabilities, Net of Tax Amount	20	(16)	42
Other comprehensive loss	$ (3,446)	$ (2,522)	$ (557)

Comprehensive Income (Loss) - S

Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 583,122	$ 550,044	$ 400,516
Other comprehensive loss	(3,446)	(2,522)	(557)
Adjustment for implementation of ASU 2018-02				$ 0
January 1, 2018, as adjusted				583,122
Balance at end of period	623,739	583,122	550,044
Unrealized Gains (Losses) on Available- for-Sale Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(3,232)	(117)	1,154
Other comprehensive income (loss) before classifications	(3,507)	(903)	(1,038)
Amounts reclassified from accumulated other comprehensive income	0	(1,640)	(233)
Other comprehensive loss	(3,507)	(2,543)	(1,271)
Adjustment for implementation of ASU 2018-02		(572)		(2,043)
January 1, 2018, as adjusted				(5,275)
Balance at end of period	(8,782)	(3,232)	(117)
Unrealized Gains (Losses) on Derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	862	672	0
Other comprehensive income (loss) before classifications	41	37	672
Amounts reclassified from accumulated other comprehensive income	0	0	0
Other comprehensive loss	41	37	672
Adjustment for implementation of ASU 2018-02		153		0
January 1, 2018, as adjusted				862
Balance at end of period	903	862	672
Pension Items
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	21	38	(4)
Other comprehensive income (loss) before classifications	20	(16)	42
Amounts reclassified from accumulated other comprehensive income	0	0	0
Other comprehensive loss	20	(16)	42
Adjustment for implementation of ASU 2018-02		(1)		0
January 1, 2018, as adjusted				21
Balance at end of period	41	21	38
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(2,349)	593	1,150
Other comprehensive income (loss) before classifications	(3,446)	(882)	(324)
Amounts reclassified from accumulated other comprehensive income	0	(1,640)	(233)
Other comprehensive loss	(3,446)	(2,522)	(557)
Adjustment for implementation of ASU 2018-02		(420)		(2,043)
January 1, 2018, as adjusted				$ (4,392)
Balance at end of period	$ (7,838)	$ (2,349)	$ 593

Fair Value Measurement and Fa_3

Fair Value Measurement and Fair Value of Financial Instruments - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	$ 638,618
Assets:
Equity securities, at fair value	15,921	$ 18,089
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	638,618	628,046
Assets:
Equity securities, at fair value	15,921	18,089
Derivative assets	12,135	6,555
Total Assets	666,674	652,690
Liabilities:
Derivative liabilities	11,036
Total Liabilities	11,036	5,465
Fair Value, Measurements, Recurring | Non Hedging
Liabilities:
Derivative liabilities		5,465
Fair Value, Measurements, Recurring | U.S. Treasury and U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		147,255
Fair Value, Measurements, Recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		424,331
Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		51,320
Fair Value, Measurements, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		5,140
Fair Value, Measurements, Recurring | U.S. Treasury and U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	140,927
Fair Value, Measurements, Recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	447,094
Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	45,505
Fair Value, Measurements, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	5,092
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	4,920	5,415
Assets:
Equity securities, at fair value	2,731	5,147
Total Assets	7,651	10,562
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring | U.S. Treasury and U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		5,415
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring | U.S. Treasury and U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	4,920
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	633,698	622,631
Assets:
Equity securities, at fair value	13,190	12,942
Derivative assets	12,135	6,555
Total Assets	659,023	642,128
Liabilities:
Derivative liabilities	11,036
Total Liabilities	11,036	5,465
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Non Hedging
Liabilities:
Derivative liabilities		5,465
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. Treasury and U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		141,840
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		424,331
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		51,320
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities		$ 5,140
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. Treasury and U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	136,007
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	447,094
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	45,505
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities, available for sale, debt securities	$ 5,092

Fair Value Measurement and Fa_4

Fair Value Measurement and Fair Value of Financial Instruments - Fair Value of Financial Assets Measured on Non-recurring Basis (Detail) - Fair Value, Measurements, Non-recurring - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases	$ 19,702	$ 22,591
Loans held for sale	1,113	456
Other real estate owned and other repossessed assets	830	843
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	1,113	456
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans and leases	19,702	22,591
Other real estate owned and other repossessed assets	$ 830	$ 843

Fair Value Measurement and Fa_5

Fair Value Measurement and Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term municipal bond	$ 6,000
Subordinate debt	105,027	$ 104,902
Non-rated
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Subordinate debt	$ 1,000
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	5.00%
Capitalization rates	4.00%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rates	11.00%
Capitalization rates	9.00%

Fair Value Measurement and Fa_6

Fair Value Measurement and Fair Value of Financial Instruments - Carrying Values and Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial Assets:
Investment securities held to maturity, Fair Value	$ 150,932	$ 138,688
Investment securities held to maturity, Carrying Value	153,646	139,685
Federal Home Loan Bank and other membership bank stocks, Fair Value	13,301	12,576
Federal Home Loan Bank and other membership bank stocks, Carrying Value	13,301	12,576
Loans and leases, net Fair Value	4,341,477	4,114,516
Loans and leases, net Carrying Value	4,419,045	4,117,265
Financial Liabilities:
Certificates of deposit, Fair Value	750,801	732,417
Certificates of deposit, Carrying value	757,038	737,428
Other borrowings, Fair Value	176,921	189,080
Other borrowings, Carrying value	181,118	192,011
Subordinated debentures, Fair Value	102,497	97,244
Subordinated debentures, Carrying Value	105,027	104,902
Significant Other Observable Inputs (Level 2)
Financial Assets:
Investment securities held to maturity, Fair Value	143,913	127,901
Federal Home Loan Bank and other membership bank stocks, Fair Value	13,301	12,576
Financial Liabilities:
Certificates of deposit, Fair Value	750,801	732,417
Other borrowings, Fair Value	176,921	189,080
Significant Unobservable Inputs (Level 3)
Financial Assets:
Investment securities held to maturity, Fair Value	7,019	10,787
Loans and leases, net Fair Value	4,341,477	4,114,516
Financial Liabilities:
Subordinated debentures, Fair Value	$ 102,497	$ 97,244

Derivatives - Additional Inform

Derivatives - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jun. 30, 2016USD ($)Derivative
Derivative [Line Items]
Available for sale securities pledged for collateral	$ 498,000	$ 500,000,000
Interest expense	39,562,000	$ 24,966,000	$ 17,647,000
Reclassification Out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Interest expense	$ 509,000
Cash Flow Hedging | Interest Rate Swaps
Derivative [Line Items]
Number of derivatives | Derivative				2
Notional amount				$ 30,000,000
Average interest rate				1.10%
Variable rate basis	3 month LIBOR
Amount of ineffective hedges	$ 0
Interest expense	$ 329,000

Derivatives - Summary Informati

Derivatives - Summary Information Regarding Derivatives (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
3rd Party interest rate swaps
Derivative [Line Items]
Derivatives, asset notional amount	$ 153,909,000	$ 110,076,000
Derivatives liability, notional amount	$ 164,427,000	$ 82,760,000
Derivatives, asset average maturity (years)	8 years 3 months 18 days	8 years 9 months 18 days
Derivative, liability average maturity (years)	12 years	11 years 6 months
Weighted average rate fixed, other assets	4.10%	3.87%
Weighted average rate fixed, other liabilities	5.04%	4.74%
Weighted average variable rate description, other assets	1 Mo. LIBOR + 2.13%	1 Mo. LIBOR + 2.11%
Weighted average variable rate, other liabilities	1 Mo. LIBOR + 2.05%	1 Mo. LIBOR + 2.21%
Derivatives asset, asset fair value	$ 5,329,000	$ 3,634,000
Derivative liability, liability fair value	$ (5,707,000)	$ (1,831,000)
Derivative asset, average basis spread on variable rate	2.00%	2.11%
Derivative liability, average basis spread on variable rate	2.05%	2.21%
Customer interest rate swaps
Derivative [Line Items]
Derivatives, asset notional amount	$ 164,427,000	$ 82,760,000
Derivatives liability, notional amount	$ 153,909,000	$ 110,076,000
Derivatives, asset average maturity (years)	12 years	11 years 6 months
Derivative, liability average maturity (years)	8 years 3 months 18 days	8 years 9 months 18 days
Weighted average rate fixed, other assets	5.04%	4.74%
Weighted average rate fixed, other liabilities	4.10%	3.87%
Weighted average variable rate description, other assets	1 Mo. LIBOR + 2.05%	1 Mo. LIBOR + 2.21%
Weighted average variable rate, other liabilities	1 Mo. LIBOR + 2.13%	1 Mo. LIBOR + 2.11%
Derivatives asset, asset fair value	$ 5,707,000	$ 1,831,000
Derivative liability, liability fair value	$ (5,329,000)	$ (3,634,000)
Derivative asset, average basis spread on variable rate	2.00%	2.21%
Derivative liability, average basis spread on variable rate	2.13%	2.11%
Interest rate swap (cash flow hedge)
Derivative [Line Items]
Derivatives, asset notional amount	$ 30,000,000	$ 30,000,000
Derivatives, asset average maturity (years)	2 years 6 months	3 years 6 months
Weighted average rate fixed, other assets	1.10%	1.10%
Weighted average variable rate description, other assets	3 Mo. LIBOR	3 Mo. LIBOR
Derivatives asset, asset fair value	$ 1,099,000	$ 1,090,000

Regulatory Matters - Additional

Regulatory Matters - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Banking and Thrift [Abstract]
Percentage of surplus	Not less than 50%
Amount of capital available for payment of dividends	$ 544.1
Tier 1 capital conservation buffer of risk-weighted assets	2.50%
Capital conservation buffer of risk-weighted assets, 2016	0.625%
Tier 1 capital conservation buffer of risk-weighted assets, 2017	0.625%
Tier 1 capital conservation buffer of risk-weighted assets, 2018	0.625%
Tier 1 capital conservation buffer of risk-weighted assets, 2019	0.625%

Regulatory Matters - Summary of

Regulatory Matters - Summary of Capital Ratios (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets)	$ 637,377	$ 589,047
Tier 1 capital (to risk-weighted assets)	523,577	477,453
Common equity Tier 1 capital (to risk-weighted assets)	493,577	447,453
Tier 1 capital (to average assets)	$ 523,577	$ 477,453
Total capital (to risk-weighted assets), ratio	13.71%	13.40%
Tier 1 capital (to risk-weighted assets), ratio	11.27%	10.87%
Common equity Tier 1 capital (to risk-weighted assets), ratio	10.62%	10.18%
Tier 1 capital (to average assets), ratio	9.39%	9.12%
Total capital (to risk-weighted assets), For capital adequacy purposes	$ 458,952	$ 406,477
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes	366,000	318,590
Common equity Tier 1 capital (to risk-weighted assets), For capital adequacy purposes	296,285	252,675
Tier 1 capital (to average assets), For capital adequacy purposes	$ 222,982	$ 209,431
Total capital (to risk-weighted assets), For capital adequacy purposes , ratio	10.00%	9.00%
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, ratio	8.00%	7.00%
Common equity Tier 1 capital (to risk-weighted assets),For capital adequacy purposes, ratio	6.375%	5.75%
Tier 1 capital (to average assets), For capital adequacy purposes, ratio	4.00%	4.00%
Subsidiaries
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets)	$ 605,560	$ 563,910
Tier 1 capital (to risk-weighted assets)	565,549	525,979
Common equity Tier 1 capital (to risk-weighted assets)	565,549	525,979
Tier 1 capital (to average assets)	$ 565,549	$ 525,979
Total capital (to risk-weighted assets), ratio	13.06%	12.86%
Tier 1 capital (to risk-weighted assets), ratio	12.20%	12.00%
Common equity Tier 1 capital (to risk-weighted assets), ratio	12.20%	12.00%
Tier 1 capital (to average assets), ratio	10.17%	10.06%
Total capital (to risk-weighted assets), For capital adequacy purposes	$ 457,912	$ 405,552
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes	365,170	317,865
Common equity Tier 1 capital (to risk-weighted assets), For capital adequacy purposes	295,614	252,100
Tier 1 capital (to average assets), For capital adequacy purposes	222,539	209,239
Total capital (to risk - weighted assets), To be well capitalized under prompt corrective action provisions	463,708	438,435
Tier 1 capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions	370,967	350,748
Common equity Tier 1 capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions	301,410	284,983
Tier 1 capital (to average assets), To be well capitalized under prompt corrective action provisions	$ 278,173	$ 261,548
Total capital (to risk - weighted assets), To be well capitalized under prompt corrective action provisions, ratio	10.00%	10.00%
Tier 1 capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Common equity Tier 1 capital (to risk-weighted assets), To be well capitalized under prompt corrective action provision, ratio	6.50%	6.50%
Tier 1 capital (to average assets), To be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 01, 2016	Jan. 07, 2016	May 31, 2013
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 136,433	$ 136,433
Core deposit intangible	1,800	2,400
Amortization of core deposit intangible	$ 594	$ 654	$ 734
Harmony Bank
Goodwill And Intangible Assets [Line Items]
Core deposit intangible				$ 691
Pascack Bancorp, Inc.
Goodwill And Intangible Assets [Line Items]
Core deposit intangible					$ 1,500
Somerset Hills Acquisition
Goodwill And Intangible Assets [Line Items]
Core deposit intangible						$ 2,700

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Schedule of Estimated Future Amortization Expense (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,019	$ 505
2,020	415
2,021	326
2,022	236
2,023	$ 147

Condensed Financial Informati_3

Condensed Financial Information - Parent Company Only - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 208,599	$ 142,933	$ 175,801	$ 118,493
Equity securities	638,618	628,046
Investment securities, held to maturity	153,646	139,685
Other assets	42,308	35,576
TOTAL ASSETS	5,806,093	5,405,639
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	41,634	31,920
Subordinated debentures	105,027	104,902
Total stockholders’ equity	623,739	583,122	550,044	400,516
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	5,806,093	5,405,639
Parent Company
ASSETS
Cash and due from banks	23,285	17,695	$ 11,675	$ 15,921
Equity securities	2,743	5,158
Investment securities, held to maturity	1,000	1,000
Investment in subsidiaries	695,571	659,180
Other assets	7,182	6,013
TOTAL ASSETS	729,781	689,046
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	1,015	1,022
Subordinated debentures	105,027	104,902
Total stockholders’ equity	623,739	583,122
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 729,781	$ 689,046

Condensed Financial Informati_4

Condensed Financial Information - Parent Company Only - Condensed Statements of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INCOME
Other income	$ 2,182	$ 3,123	$ 1,769
EXPENSE
Noninterest expenses	111,167	104,534	99,917
Income taxes (benefit) provision	16,888	27,469	21,321
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	63,401	52,580	41,518
Parent Company
INCOME
Dividends from subsidiaries	30,589	26,665	20,687
Other income	(125)	2,750	199
TOTAL INCOME	30,464	29,415	20,886
EXPENSE
Interest on subordinated debentures	5,141	5,091	2,171
Noninterest expenses	506	377	442
TOTAL EXPENSE	5,647	5,468	2,613
Income before (benefit) provision for income taxes	24,817	23,947	18,273
Income taxes (benefit) provision	(1,130)	(2,018)	(845)
Income before equity in undistributed income of subsidiaries	25,947	25,965	19,118
Equity in undistributed income of subsidiaries	37,454	26,615	22,400
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	$ 63,401	$ 52,580	$ 41,518

Condensed Financial Informati_5

Condensed Financial Information - Parent Company Only - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	$ 63,401	$ 52,580	$ 41,518
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Change in market value of equity securities	583	0	0
Excess tax benefits	318	587	0
Increase in other assets	2,679	(25,065)	(5,600)
(Decrease) increase in other liabilities	9,743	3,705	1,618
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of available for sale securities	(110,370)	(140,258)	(244,861)
Purchase of equity securities	(570)	(307)	(838)
Proceeds from sale of available for sale securities	0	4,500	15,654
Proceeds from sales of equity securities	2,155	0	0
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividends paid on common stock	(21,307)	(18,853)	(16,007)
Proceeds from issuance of common stock, net	0	0	48,678
Proceeds from issuance of subordinated debt, net	0	0	73,516
Retirement of restricted stock	(763)	(773)	(206)
Excess tax benefits	0	0	43
Exercise of stock options	307	321	285
Net increase (decrease) in cash and cash equivalents	65,666	(32,868)	57,308
Cash and cash equivalents, beginning of year	142,933	175,801	118,493
CASH AND CASH EQUIVALENTS, END OF YEAR	208,599	142,933	175,801
Parent Company
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	63,401	52,580	41,518
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Gain on securities	0	(2,539)	0
Amortization of subordinated debt costs	125	118	30
Change in market value of equity securities	338	0	0
Excess tax benefits	318	587	0
Increase in other assets	(1,446)	(1,927)	(922)
(Decrease) increase in other liabilities	(6)	(17)	1,010
Equity in undistributed income of subsidiaries	(37,454)	(26,615)	(22,400)
NET CASH PROVIDED BY OPERATING ACTIVITIES	25,276	22,187	19,236
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash used in acquisition	0	0	(5,356)
Purchases of available for sale securities	0	(79)	(62)
Purchase of equity securities	(78)	0	0
Proceeds from sale of available for sale securities	0	3,217	0
Proceeds from sales of equity securities	2,155	0	0
Contribution to subsidiary	0	0	(124,373)
NET CASH USED IN INVESTING ACTIVITIES	2,077	3,138	(129,791)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividends paid on common stock	(21,307)	(18,853)	(16,007)
Proceeds from issuance of common stock, net	0	0	48,678
Proceeds from issuance of subordinated debt, net	0	0	73,516
Retirement of restricted stock	(763)	(773)	(206)
Excess tax benefits	0	0	43
Exercise of stock options	307	321	285
NET CASH PROVIDED BY FINANCING ACTIVITIES	(21,763)	(19,305)	106,309
Net increase (decrease) in cash and cash equivalents	5,590	6,020	(4,246)
Cash and cash equivalents, beginning of year	17,695	11,675	15,921
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 23,285	$ 17,695	$ 11,675

Uncategorized Items - lbai-2018

Label	Element	Value
Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 512,734,000
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
Retained Earnings [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 74,780,000