The First of Long Island Corporation (FLIC) 10-K 15 Mar 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Mar. 01, 2019	Jun. 29, 2018
Document And Entity Information
Entity Registrant Name	FIRST OF LONG ISLAND CORP
Entity Central Index Key	0000740663
Trading Symbol	flic
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		25,153,936
Entity Public Float			$ 605.3
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets:
Cash and cash equivalents	$ 47,358	$ 69,672
Investment securities:
Held-to-maturity, at amortized cost (fair value of $5,552 and $7,749)	5,504	7,636
Available-for-sale, fair value	758,015	720,128
Total securities	763,519	727,764
Loans:
Commercial and industrial	98,785	109,623
Secured by real estate:
Commercial mortgages	1,281,295	1,193,007
Residential mortgages	1,809,651	1,558,564
Home equity lines	67,710	83,625
Consumer and other	5,958	5,533
Total Loans	3,263,399	2,950,352
Allowance for loan losses	(30,838)	(33,784)
Total	3,232,561	2,916,568
Restricted stock, at cost	40,686	37,314
Bank premises and equipment, net	41,267	39,648
Bank-owned life insurance	80,925	59,665
Pension plan assets, net	15,154	19,152
Deferred income tax benefit	3,447
Other assets	16,143	24,925
Total assets	4,241,060	3,894,708
Deposits:
Checking	935,574	896,129
Savings, NOW and money market	1,590,341	1,602,460
Time, $100,000 and over	309,165	203,890
Time, other	249,892	119,518
Total	3,084,972	2,821,997
Short-term borrowings	388,923	281,141
Long-term debt	362,027	423,797
Accrued expenses and other liabilities	16,951	10,942
Deferred income taxes payable		2,381
Total liabilities	3,852,873	3,540,258
Commitments and Contingent Liabilities (Note L)
Stockholders' Equity:
Common stock, par value $.10 per share: Authorized, 80,000,000 shares; Issued and outstanding, 25,422,740 and 24,668,390 shares	2,542	2,467
Surplus	145,163	127,122
Retained earnings	249,922	224,315
Total	397,627	353,904
Accumulated other comprehensive income (loss), net of tax	(9,440)	546
Total	388,187	354,450
Total	$ 4,241,060	$ 3,894,708

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Consolidated Balance Sheets [Abstract]
Held-to-Maturity Securities, Fair Value	$ 5,552	$ 7,749
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	25,422,740	24,668,390
Common stock, shares outstanding (in shares)	25,422,740	24,668,390

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest and dividend income:
Loans	$ 112,784	$ 97,027	$ 82,456
Taxable	12,040	7,754	7,981
Nontaxable	13,413	13,484	13,686
Total interest and dividend income	138,237	118,265	104,123
Interest expense:
Savings, NOW and money market deposits	12,105	7,113	5,344
Time deposits	10,452	5,479	5,107
Short-term borrowings	4,858	1,345	296
Long-term debt	8,315	7,772	7,255
Total interest expense	35,730	21,709	18,002
Net interest income	102,507	96,556	86,121
Provision (credit) for loan losses	(1,755)	4,854	3,480
Net interest income after provision (credit) for loan losses	104,262	91,702	82,641
Noninterest income:
Investment Management Division income	2,175	2,090	2,000
Service charges on deposit accounts	2,634	2,792	2,666
Net gains (losses) on sales of securities	(10,406)	(1,866)	1,868
Other	7,876	5,145	3,970
Total	2,279	8,161	10,504
Noninterest expense:
Salaries	27,926	25,373	23,258
Employee benefits and other personnel expense	8,539	7,268	6,872
Occupancy and equipment	11,686	10,245	9,264
Debt extinguishment			1,756
Other	11,755	11,966	12,066
Total noninterest expense	59,906	54,852	53,216
Income before income taxes	46,635	45,011	39,929
Income tax expense	5,062	9,889	9,049
Net income	$ 41,573	$ 35,122	$ 30,880
Earnings per share:
Basic	$ 1.64	$ 1.44	$ 1.35
Diluted	1.63	1.43	1.34
Cash dividends declared per share	$ 0.64	$ 0.58	$ 0.55

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 41,573	$ 35,122	$ 30,880
Other comprehensive income (loss):
Change in net unrealized holding gains (losses) on available-for-sale securities	(8,485)	1,631	(17,004)
Change in funded status of pension plan	(4,316)	1,718	1,443
Change in net unrealized loss on derivative instrument	(1,130)
Other comprehensive income (loss) before income taxes	(13,931)	3,349	(15,561)
Income tax expense (benefit)	(4,222)	1,199	(6,433)
Other comprehensive income (loss)	(9,709)	2,150	(9,128)
Comprehensive income	$ 31,864	$ 37,272	$ 21,752

Consolidated Statement Of Chang

Consolidated Statement Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]		Total
Balance (in shares) at Dec. 31, 2015	14,116,677
Balance at Dec. 31, 2015	$ 1,412	$ 56,931	$ 185,069	$ 7,524		$ 250,936
Net income			30,880			30,880
Other comprehensive income (loss)				(9,128)		(9,128)
Common stock issued in public offering, net of issuance costs (in shares)	1,300,000
Common stock issued in public offering, net of issuance costs	$ 130	35,140				35,270
Shares withheld upon the vesting and conversion of RSUs (in shares)	(13,393)
Shares withheld upon the vesting and conversion of RSUs	$ (1)	(369)				(370)
Common stock issued under stock compensation plans (in shares)	109,409
Common stock issued under stock compensation plans	$ 11	895				906
Common stock issued under dividend reinvestment and stock purchase plan (in shares)	287,498
Common stock issued under dividend reinvestment and stock purchase plan	$ 28	8,414				8,442
3-for-2 stock split (in shares)	7,898,916
3-for-2 stock split	$ 790	(790)
Stock-based compensation		1,517				1,517
Cash dividends declared			(12,623)			(12,623)
Balance (in shares) at Dec. 31, 2016	23,699,107
Balance at Dec. 31, 2016	$ 2,370	101,738	203,326	(1,604)		305,830
Net income			35,122			35,122
Other comprehensive income (loss)				2,150		2,150
Shares withheld upon the vesting and conversion of RSUs (in shares)	(19,339)
Shares withheld upon the vesting and conversion of RSUs	$ (2)	(525)				(527)
Common stock issued under stock compensation plans (in shares)	164,720
Common stock issued under stock compensation plans	$ 17	959				976
Common stock issued under dividend reinvestment and stock purchase plan (in shares)	823,902
Common stock issued under dividend reinvestment and stock purchase plan	$ 82	22,516				22,598
Stock-based compensation		2,434				2,434
Cash dividends declared			(14,133)			(14,133)
Balance (in shares) at Dec. 31, 2017	24,668,390
Balance at Dec. 31, 2017	$ 2,467	127,122	224,315	546		354,450
Net income			41,573			41,573
Other comprehensive income (loss)				(9,709)		(9,709)
Reclassification of stranded tax effects upon the adoption of ASU 2018-02			277	(277)	[1]
Repurchase of common stock	$ (8)	(1,533)				(1,541)
Repurchase of common stock (in shares)	(77,300)
Shares tendered upon the exercise of stock options	$ (1)	(365)				(366)
Shares tendered upon the exercise of stock options (in shares)	(14,549)
Shares withheld upon the vesting and conversion of RSUs (in shares)	(27,591)
Shares withheld upon the vesting and conversion of RSUs	$ (3)	(771)				(774)
Common stock issued under stock compensation plans (in shares)	174,164
Common stock issued under stock compensation plans	$ 17	727				744
Common stock issued under dividend reinvestment and stock purchase plan (in shares)	699,626
Common stock issued under dividend reinvestment and stock purchase plan	$ 70	18,169				18,239
Stock-based compensation		1,814				1,814
Cash dividends declared			(16,243)			(16,243)
Balance (in shares) at Dec. 31, 2018	25,422,740
Balance at Dec. 31, 2018	$ 2,542	$ 145,163	$ 249,922	$ (9,440)		$ 388,187
[1]	The adoption of Accounting Standards Update ("ASU") 2018-02 "Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" in the first quarter of 2018 allowed the Corporation to reclassify certain stranded tax effects arising from the enactment of the Tax Cuts and Jobs Act ("Tax Act") in December 2017 from accumulated other comprehensive income to retained earnings. See "Adoption of New Accounting Standards" for more information regarding the effects of adopting ASU 2018-02.

Consolidated Statement Of Cha_2

Consolidated Statement Of Changes In Stockholders' Equity (Parenthetical)	Oct. 27, 2016
Consolidated Statement Of Changes In Stockholders' Equity [Abstract]
Stock split ratio	1.5

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Cash Flows From Operating Activities:
Net income	$ 41,573,000	$ 35,122,000	$ 30,880,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (credit) for loan losses	(1,755,000)	4,854,000	3,480,000
Provision (credit) for deferred income taxes	(1,601,000)	1,114,000	1,233,000
Provision for losses on other real estate owned		725,000
Depreciation and amortization	4,068,000	3,604,000	3,219,000
Premium amortization on investment securities, net	1,714,000	3,045,000	4,002,000
Net (losses) gains on sales of securities	10,406,000	1,866,000	(1,868,000)
Net gain on sale of premises and equipment	(1,176,000)
Loss on debt extinguishment			1,756,000
Stock-based compensation expense	1,814,000	2,434,000	1,517,000
Accretion of cash surrender value on bank-owned life insurance	(2,134,000)	(1,568,000)	(932,000)
Pension expense (credit) less contribution	(319,000)	(118,000)	(1,536,000)
Increase (decrease) in accrued expenses and other liabilities	4,002,000	1,031,000	(3,313,000)
Other decreases (increases)	2,782,000	(4,937,000)	(2,849,000)
Net cash provided by operating activities	59,374,000	47,172,000	35,589,000
Proceeds from sales of investment securities:
Held-to-maturity		355,000	123,000
Available-for-sale	263,994,000	135,695,000	62,047,000
Proceeds from maturities and redemptions of investment securities:
Held-to-maturity	5,240,000	6,089,000	4,322,000
Available-for-sale	74,639,000	100,994,000	108,486,000
Purchases of investment securities:
Held-to-maturity	(3,059,000)	(2,606,000)	(1,403,000)
Available-for-sale	(397,174,000)	(144,885,000)	(267,329,000)
Proceeds from sales of loans held-for-sale	1,250,000		544,000
Proceeds from sale of real estate	6,793,000
Net increase in loans	(315,389,000)	(411,908,000)	(298,361,000)
Net increase in restricted stock	(3,372,000)	(5,551,000)	(3,328,000)
(Purchases of) proceeds from bank-owned life insurance, net	(18,561,000)	(25,000,000)	388,000
Purchases of premises and equipment, net	(5,687,000)	(8,891,000)	(7,250,000)
Net cash used in investing activities	(391,326,000)	(355,708,000)	(401,761,000)
Cash Flows From Financing Activities:
Net increase in deposits	262,975,000	213,280,000	324,042,000
Net increase (decrease) in short-term borrowings	107,782,000	74,129,000	(4,490,000)
Proceeds from long-term debt	39,680,000	71,635,000	43,500,000
Repayment of long-term debt	(101,450,000)	(27,050,000)	(31,756,000)
Proceeds from issuance of common stock, net	18,239,000	22,598,000	43,712,000
Proceeds from exercise of stock options	312,000	917,000	906,000
Repurchases of common stock	(1,541,000)
Shares withheld upon the vesting and conversion of RSUs	(774,000)	(527,000)	(370,000)
Cash dividends paid	(15,585,000)	(13,703,000)	(12,078,000)
Net cash provided by financing activities	309,638,000	341,279,000	363,466,000
Net (decrease) increase in cash and cash equivalents	(22,314,000)	32,743,000	(2,706,000)
Cash and cash equivalents, beginning of year	69,672,000	36,929,000	39,635,000
Cash and cash equivalents, end of period	47,358,000	69,672,000	36,929,000
Supplemental Cash Flow Disclosures:
Cash paid for interest	35,274,000	21,545,000	21,158,000
Cash paid for income taxes	2,490,000	12,838,000	9,006,000
Noncash investing and financing activities:
Cash dividends payable	4,456,000	3,798,000	$ 3,368,000
Additions to other real estate owned		$ 5,850,000
Loans transferred from portfolio to held-for-sale	$ 1,151,000

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Summary Of Significant Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	NOTE A – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES  The consolidated financial statements include the accounts of The First of Long Island Corporation and its wholly-owned subsidiary, The First National Bank of Long Island, and subsidiaries wholly-owned by the Bank, either directly or indirectly: The First of Long Island Agency, Inc.; FNY Service Corp. (“FNY”); and The First of Long Island REIT, Inc. (“REIT”). The Corporation’s financial condition and operating results principally reflect those of the Bank and its subsidiaries. The consolidated entity is referred to as the “Corporation,” and the Bank and its subsidiaries are collectively referred to as the “Bank.” All intercompany balances and amounts have been eliminated. In preparing the consolidated financial statements, management is required to make estimates, such as the allowance for loan losses, and assumptions that affect the reported asset and liability balances, revenue and expense amounts and the disclosure of contingent assets and liabilities. Actual results could differ significantly from those estimates.  The accounting and reporting policies of the Corporation reflect banking industry practice and conform to generally accepted accounting principles (“GAAP”) in the United States. The following is a summary of the Corporation’s significant accounting policies.  Cash and Cash Equivalents  Cash and cash equivalents include cash and deposits with other financial institutions that generally mature within 90 days.  Investment Securities  Current accounting standards require that investment securities be classified as held-to-maturity, available-for-sale or trading. The trading category is not applicable to any securities in the Bank's portfolio because the Bank does not buy or hold debt or equity securities principally for the purpose of selling in the near term. Held-to-maturity securities, or debt securities which the Bank has the intent and ability to hold to maturity, are reported at amortized cost. Available-for-sale securities, or debt securities which are neither held-to-maturity securities nor trading securities, are reported at fair value, with unrealized gains and losses, net of the related income tax effect, included in other comprehensive income (loss). Equity securities, if any, are carried at fair value, with changes in fair value reported in net income. Equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment.  Interest income includes amortization or accretion of purchase premium or discount. Premiums and discounts on securities are amortized or accreted using the level-yield method. Prepayments are anticipated for mortgage-backed securities. Premiums on municipal securities are amortized to the earlier of the stated maturity date or the first call date, while discounts on municipal securities are accreted to the stated maturity date. Realized gains and losses on the sale of securities are determined using the specific identification method.  Investment securities are evaluated for other-than-temporary impairment (“OTTI”) no less often than quarterly. In determining OTTI, management considers many factors, including: (1) the length of time and the extent to which the fair value has been less than cost; (2) the financial condition and near-term prospects of the issuer; (3) whether the market decline was affected by macroeconomic conditions; and (4) whether management has the intent to sell the debt security or more likely than not will be required to sell the debt security before its anticipated recovery. The assessment of whether an other-than-temporary decline exists involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time.  When OTTI occurs, management considers whether it intends to sell, or, more likely than not, will be required to sell a security in an unrealized loss position before recovery of its amortized cost basis. If either of these criteria is met, the entire difference between amortized cost and fair value is recognized in earnings. For securities that do not meet the aforementioned criteria, the amount of impairment recognized in earnings is limited to the amount related to credit losses, while impairment related to other factors is recognized in other comprehensive income (loss).  Loans Held-for-Sale  Loans held-for-sale are carried at the lower of cost or fair value. Any subsequent declines in fair value below the initial carrying value are recorded as a valuation allowance established through a charge to noninterest income.  Loans and Allowance for Loan Losses  Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding principal balance less any chargeoffs and the allowance for loan losses and plus or minus net deferred loan costs and fees, respectively. Interest on loans is credited to income based on the principal amount outstanding. Direct loan origination costs, net of loan origination fees, are deferred and recognized in interest income using the level-yield method without anticipating prepayments.  The past due status of a loan is based on the contractual terms in the loan agreement. Unless a loan is well secured and in the process of collection, the accrual of interest income is discontinued when a loan becomes 90 days past due as to principal or interest payments. The accrual of interest income on a loan is also discontinued when it is determined that the borrower will not be able to make principal and interest payments according to the contractual terms of the current loan agreement. When the accrual of interest income is discontinued on a loan, any accrued but unpaid interest is reversed against current period income. Interest received on nonaccrual loans is applied to the outstanding principal balance until the loans qualify for return to an accrual status, if ever. Return to an accrual status occurs when all the principal and interest amounts contractually past due are brought current and all future payments are reasonably assured.  The allowance for loan losses is established through provisions for loan losses charged against income. When available information confirms that specific loans, or portions thereof, are uncollectible, these amounts are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance.  The allowance for loan losses is an amount that management currently believes will be adequate to absorb probable incurred losses in the Bank’s loan portfolio. The process for estimating credit losses and determining the allowance for loan losses as of any balance sheet date is subjective in nature and requires material estimates. Actual results could differ significantly from those estimates.  The allowance for loan losses is comprised of specific reserves allocated to individually impaired loans plus estimated losses on pools of loans that are collectively reviewed. Although the allowance for loan losses has two separate components, one for impairment losses on individual loans and one for collective impairment losses on pools of loans, the entire allowance for loan losses is available to absorb realized losses as they occur whether they relate to individual loans or pools of loans.  Estimated losses for loans individually deemed to be impaired are based on either the fair value of collateral or the discounted value of expected future cash flows. For all collateral dependent impaired loans, impairment losses are measured based on the fair value of the collateral. A loan is considered to be impaired when, based on current information and events, it is probable that the Bank will be unable to collect the scheduled principal and interest when due according to the contractual terms of the current loan agreement. Loans that experience insignificant payment delays and payment shortfalls are not automatically considered to be impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record and financial condition and the amount of the shortfall in relation to the principal and interest owed. In estimating the fair value of real estate collateral, management utilizes appraisals or evaluations adjusted for costs to dispose and a distressed sale adjustment, if needed.  In addition to estimating losses for loans individually deemed to be impaired, management also estimates collective impairment losses for pools of loans that are not specifically reviewed. Loan pools include: commercial and industrial loans; small business credit scored loans; owner-occupied commercial mortgages; multifamily commercial mortgages; other commercial mortgages; construction and land development loans; first-lien residential mortgages; junior-lien residential mortgages; first-lien home equity lines; junior-lien home equity lines; and consumer loans. The Bank’s highest average annualized loss experience over periods of 24, 36, 48 or 60 months is generally the starting point in determining the allowance for loan losses for each pool of loans. Management believes that this approach appropriately reflects losses from the current economic cycle and those incurred losses in the Bank’s loan portfolio. However, since future losses could vary significantly from those experienced in the past, on a quarterly basis management adjusts its historical loss experience to reflect current conditions. In doing so, management considers a variety of general qualitative factors and then subjectively determines the weight to assign to each in estimating losses. The factors include, among others: (1) delinquencies, (2) economic conditions as judged by things such as national and local unemployment levels, (3) changes in value of underlying collateral as judged by things such as median home prices, commercial vacancy rates and forecasted vacancy and rental rates in the Bank’s service area, (4) trends in the nature and volume of loans, (5) concentrations of credit, (6) changes in lending policies and procedures, (7) experience, ability and depth of lending staff, (8) changes in the quality of the loan review function, (9) environmental risks, and (10) loan risk ratings. Substantially all of the Bank’s allowance for loan losses allocable to pools of loans that are collectively evaluated for impairment results from these qualitative adjustments to historical loss experience. Because of the nature of the qualitative factors and the difficulty in assessing their impact, management’s resulting estimate of losses may not accurately reflect actual losses in the portfolio.  Troubled debt restructurings are by definition impaired loans and are generally reported at the present value of estimated future cash flows using the loan’s effective rate at inception. However, if a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported at the fair value of the collateral.  Transfers of Financial Assets  Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Corporation, 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 the Corporation does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.  Bank Premises and Equipment  Land is carried at cost. Other bank premises and equipment are carried at cost less accumulated depreciation and amortization. Buildings are depreciated using the straight-line method over their estimated useful lives, which range from 31 to 40 years. Building and leasehold improvements are depreciated using the straight-line method over the remaining lives of the buildings or leases, as applicable, or their estimated useful lives, whichever is shorter. The lives of the respective leases range from five to twenty years. Furniture, fixtures and equipment are depreciated using the straight-line method over their estimated useful lives, which range from three to ten years. Premises and equipment held-for-sale, if any, is included in Other Assets on the Corporation’s consolidated balance sheet and carried at the lower of cost or fair value.  Bank-owned Life Insurance  The Bank is the owner and beneficiary of insurance policies on the lives of certain officers. Bank-owned life insurance (“BOLI”) is recorded at the amount that can be realized under the contract at the balance sheet date, which is the cash surrender value adjusted for other charges or amounts due that are probable at settlement, if any.  Restricted Stock  The Bank is a member of and is required to own stock in the Federal Home Loan Bank of New York (“FHLB”) and the Federal Reserve Bank of New York (“FRB”). The amount of FHLB stock held is based on membership and the level of FHLB advances. The amount of FRB stock held is based on the Bank’s capital and surplus balances. These stocks do not have a readily determinable fair value, are carried at cost, classified as restricted stock and periodically evaluated for impairment based on the prospects for the ultimate recovery of cost. Cash dividends, if any, are reported as interest income on taxable investment securities.  Other Real Estate Owned  Real estate acquired through foreclosure or by deed-in-lieu of foreclosure is initially recorded at the lower of cost or fair value, less estimated selling costs and is included in other assets on the consolidated balance sheet. Chargeoffs recorded at the time of acquisition are charged to the allowance for loan losses. Thereafter, decreases in the property’s estimated fair value are charged to earnings and credited to a valuation allowance and subsequent recoveries in fair value are credited to earnings and charged to the valuation allowance. Such adjustments to earnings are included in other noninterest expense along with any additional property maintenance costs incurred in owning the property. Rental income received from tenants of other real estate owned is included in other noninterest income.  Long-term Assets  Premises and equipment, intangible assets, BOLI and other long-term assets, if any, are reviewed for impairment when events indicate that their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.  Loan Commitments and Related Financial Instruments  Financial instruments include off-balance-sheet credit instruments, such as commitments to make loans, commercial letters of credit and standby letters of credit. The face amount of these items represents the exposure to loss, before considering collateral held or ability to repay. The Bank maintains a reserve for losses on off-balance-sheet credit exposures which is included in accrued expenses and other liabilities on the consolidated balance sheet. Off-balance-sheet credit instruments are recorded on the balance sheet when they are funded or drawn down.  Derivatives  The Corporation records cash flow hedges at the inception of a derivative contract based on management’s intentions and belief as to the likely effectiveness of the hedge. Cash flow hedges represent a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability. For a cash flow hedge, the gain or loss on the derivative is recorded in other comprehensive income (loss) and is reclassified into earnings in the same period during which the hedged transaction affects earnings. The changes in the fair value of a derivative that is not highly effective in hedging the expected cash flows of the hedged item are recognized immediately as noninterest income in the consolidated income statements.  Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged. Net cash settlements on derivatives that do not qualify for hedge accounting are reported in noninterest income. Cash flows from hedges are classified in the consolidated statements of cash flows in the same manner as the items being hedged.  The Corporation formally documents the relationship between derivatives and hedged items, as well as the risk management objective and the strategy for undertaking hedge transactions at the inception of the hedging relationship. This documentation includes linking cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. The Corporation also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in cash flows of the hedged item. The Corporation discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in cash flows of the hedged item, the derivative is settled or terminated, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm or treatment of the derivative as a hedge is no longer appropriate or intended.  When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded as noninterest income. When a cash flow hedge is discontinued but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income (loss) are amortized into earnings over the same periods which the hedged transactions will affect earnings.  Checking Deposits  The Bank’s commercial checking accounts generally have a related noninterest-bearing sweep account. The sole purpose of the sweep accounts is to reduce the reserve balances that the Bank is required to maintain with the FRB, and thereby increase funds available for investment. Although the sweep accounts are classified as savings accounts for regulatory purposes, they are included in checking deposits in the accompanying consolidated balance sheets.  Income Taxes  A current tax liability or asset is recognized for the estimated taxes payable or refundable on tax returns for the current year. A deferred tax liability or asset is recognized for the estimated future tax effects attributable to temporary differences and carryforwards. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized. The measurement of current and deferred tax liabilities and assets is based on provisions of the enacted tax law. The effects of future changes in tax laws or rates are not considered. The Corporation recognizes interest and/or penalties related to income tax matters in noninterest income or noninterest expense as appropriate.  Retirement Plans  Pension expense is the sum of service cost, interest cost, amortization of actuarial gains and losses and plan expenses, net of the expected return on plan assets and participant contributions. The service cost component of pension expense is included in salaries on the consolidated statement of income. All other components of pension expense are included in other noninterest income. Employee 401(k) plan expense is equal to the amount of the Corporation’s matching contributions and is included in employee benefits and other personnel expense on the consolidated statement of income.  Loss Contingencies  Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated.  Stockholders’ Equity  Earnings Per Share . The Corporation calculates basic and diluted earnings per share (“EPS”) using the two-class method. Under the two-class method, net income for the period is allocated between common stockholders and participating securities according to dividends declared and participation rights in undistributed earnings. Basic EPS excludes the dilutive effect of outstanding stock options and restricted stock units (“RSUs”) and is computed by dividing net income allocated to common stockholders by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if outstanding stock options and RSUs were converted into shares of common stock that then shared in the earnings of the Corporation. Diluted EPS is computed by dividing net income allocated to common stockholders by the weighted average number of common shares and dilutive stock options and RSUs. 6,122 RSUs were excluded from the calculation of EPS at December 31, 2018 because their inclusion would be anti-dilutive. There were no anti-dilutive stock options or RSUs at December 31, 2017 or 2016. Other than the stock options and RSUs described in “Note I – Stock-Based Compensation”, the Corporation has no securities that could be converted into common stock nor does the Corporation have any contracts that could result in the issuance of common stock.  The following table is a calculation of basic and diluted EPS for the periods indicated.      (dollars in thousands, except per share data) 2018 2017 2016  Net income $ 41,573 $ 35,122 $ 30,880  Income allocated to participating securities (1) 115 128 127  Income allocated to common stockholders $ 41,458 $ 34,994 $ 30,753   Weighted average:  Common shares 25,293,698 24,219,813 22,745,967  Dilutive stock options and restricted stock units (1) 164,301 255,333 271,929  25,457,999 24,475,146 23,017,896  Earnings per share:  Basic $1.64 $1.44 $1.35  Diluted $1.63 $1.43 $1.34  (1) RSUs awarded in 2016 accrue dividends at the same rate as the dividends declared by the Board of Directors on the Corporation’s common stock. For purposes of computing EPS, these RSUs are considered to participate with common stock in the earnings of the Corporation and, therefore, the Corporation calculates basic and diluted EPS using the two-class method. Under the two-class method, net income for the period is allocated between common stockholders and participating securities according to dividends declared and participation rights in undistributed earnings. Substantially all of the RSUs awarded in 2016 vested on December 31, 2018.  Stock Split. On October 27, 2016, the Corporation declared a 3 -for-2 stock split effected through a 50% stock dividend. Additional shares issued as a result of the stock split are shown for 2016 on the line captioned “3-for-2 stock split” in the Consolidated Statement of Changes in Stockholders’ Equity. Share and per share amounts included in the consolidated financial statements and notes thereto have been adjusted as appropriate to reflect the effect of the split.  Public Offering of Common Stock. In May 2016, the Corporation sold 1,300,000 shares of common stock ( 1,950,000 shares post-split) in an underwritten public offering at a price of $29.00 per share ( $19.33 post-split). The net proceeds of the offering, after the underwriting discount and offering expenses paid by the Corporation, were $35,270,000 .  Stock-based Compensation  The Corporation’s stock-based compensation plans are described in “Note I – Stock-Based Compensation”. Compensation cost is determined for stock options and RSUs issued to employees and non-employee directors based on the grant date fair value of the award.  Compensation expense for RSUs is recognized over the applicable performance or service period, which is usually the vesting period, or the period from the grant date to the participant’s eligible retirement date, whichever is shorter. Compensation expense is adjusted at the end of the performance period, if applicable, to reflect the actual number of shares of the Corporation’s common stock into which the RSUs will be converted. Compensation expense for stock options is recognized ratably over the five -year vesting period or the period from the grant date to the participant’s eligible retirement date, whichever is shorter. The Corporation accounts for forfeitures as they occur.  Comprehensive Income  Comprehensive income includes net income and other comprehensive income (loss). Other comprehensive income (loss) includes revenues, expenses, gains and losses that under GAAP are included in comprehensive income but excluded from net income. Other comprehensive income (loss) for the Corporation consists of net unrealized holding gains or losses on available-for-sale securities and derivative instruments and changes in the funded status of the Bank’s defined benefit pension plan, all net of related income taxes. Accumulated other comprehensive income (loss) is recognized as a separate component of stockholders’ equity.  The components of other comprehensive income (loss) and the related tax effects are as follows:      (in thousands) 2018 2017 2016  Change in net unrealized holding gains (losses) on available-for-sale securities:  Change arising during the period $ (18,891) $ (236) $ (15,153)  Reclassification adjustment for losses (gains) included in net income (1) 10,406 1,867 (1,851)  (8,485) 1,631 (17,004)  Tax effect (2,569) 685 (6,983)  (5,916) 946 (10,021)  Change in funded status of pension plan:  Unrecognized net gain (loss) arising during the period (4,316) 1,700 1,199  Amortization of net actuarial loss included in pension expense (2) — 18 244  (4,316) 1,718 1,443  Tax effect (1,312) 514 550  (3,004) 1,204 893  Change in unrealized loss on derivative instrument:  Amount of loss recognized during the period (1,607) — —  Reclassification adjustment for net interest expense included in  net income (3) 477 — —  (1,130) — —  Tax effect (341) — —  (789) — —  Other comprehensive income (loss) $ (9,709) $ 2,150 $ (9,128)  (1) Represents net realized gains and losses arising from the sale of available-for-sale securities. These net realized gains and losses are included in the consolidated statements of income in the line item, “Net gains (losses) on sales of securities.” See “Note B – Investment Securities” for the income tax expense or benefit related to these net realized gains and losses, which is included in the consolidated statements of income in the line item “Income tax expense.”  (2) Represents the amortization of net actuarial loss relating to the Corporation’s defined benefit pension plan. This item is a component of net periodic pension cost (see “Note J – Retirement Plans”) and included in the consolidated statements of income in the line item, “Other noninterest income.”  (3) Represents the net interest expense recorded on a derivative transaction and included in the consolidated statements of income in the line item “Interest expense – short-term borrowings.”  The following sets forth the components of accumulated other comprehensive income (loss), net of tax:      Current Period Change due to  Other Adoption  Balance Comprehensive of ASU Balance  (in thousands) 12/31/17 Income (Loss) 2018-02 (1) 12/31/18  Unrealized holding gains (losses) on available-for-sale securities $ 2,600 $ (5,916) $ 361 $ (2,955)  Unrealized actuarial losses on pension plan (2,054) (3,004) (638) (5,696)  Unrealized loss on derivative instrument — (789) — (789)  Accumulated other comprehensive income (loss), net of tax $ 546 $ (9,709) $ (277) $ (9,440)  (1) The adoption of Accounting Standards Update (“ASU”) 2018-02 “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” in the first quarter of 2018 allowed the Corporation to reclassify certain stranded tax effects arising from the enactment of the Tax Cuts and Jobs Act (“Tax Act”) in December 2017 from accumulated other comprehensive income to retained earnings. See “Adoption of New Accounting Standards” for more information regarding the effects of adopting ASU 2018-02.  Operating Segments  While management monitors the revenue streams of the Bank’s various products and services, the identifiable segments are not material and operations are managed and financial performance is evaluated on a company-wide basis. Accordingly, all of the financial operations of the Bank are aggregated in one reportable operating segment.  Investment Management Division  Assets held in a fiduciary capacity are not assets of the Corporation and, accordingly, are not included in the accompanying consolidated financial statements. The Investment Management Division records fees on the accrual basis.  Reclassifications  When appropriate, items in the prior year financial statements are reclassified to conform to the current period presentation.  Adoption of New Accounting Standards  In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09 “Revenue from Contracts with Customers.” While the guidance in ASU 2014-09 supersedes most existing industry-specific revenue recognition accounting guidance, much of a bank’s revenue comes from financial instruments such as debt securities and loans that are scoped-out of the guidance. The amendments in ASU 2014-09 also include improved disclosures to enable users of financial statements to better understand the nature, amount, timing and uncertainty of revenue that is recognized. The adoption of ASU 2014-09 and all subsequent amendments on January 1, 2018, using the modified retrospective transition method, did not materially impact the Corporation’s financial position or results of operations and, as such, no cumulative effect adjustment was recorded. See “Note N – Revenue from Contracts with Customers” for disclosures pertaining to the revenue streams within the scope of ASU 2014-09.  In January 2016, the FASB issued ASU 2016-01 “Financial Instruments – Overall.” The adoption of ASU 2016-01 on January 1, 2018 did not have a material impact on the Corporation’s financial position or results of operations but resulted in the prospective application of an exit price notion in the determination of the fair value of certain financial instruments as disclosed in “Note M – Fair Value of Financial Instruments.” Adoption of the ASU also resulted in the elimination of disclosures regarding the methods and assumptions used to estimate fair value. The Bank’s FHLB and FRB stock, included under the line item “Restricted stock, at cost” in the consolidated balance sheets, are specifically excluded from the scope of the ASU.  In August 2016, the FASB issued ASU 2016-15 “Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing diversity in practice. The adoption of ASU 2016-15 on January 1, 2018 did not have a material impact on the Corporation’s cash flows or disclosures.  In March 2017, the FASB issued ASU 2017-07 “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” The ASU requires, among other things, that an employer disaggregate the service cost component from other components of net benefit cost and provides explicit guidance on how to present the service cost component and other components of net benefit cost in the income statement. The adoption of ASU 2017-07 on January 1, 2018 resulted in revised income statement classifications of the components of net periodic pension cost for all periods presented. T he Corporation used the amounts disclosed in “Note J – Retirement Plans” as the basis for applying the retrospective presentation requirements of the ASU. See Note J for details of the reclassified amounts. The other amendments in the ASU did not materially impact the Corporation’s financial position or results of operations.  In February 2018, the FASB issued ASU 2018-02 “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The ASU allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Act which was signed into law on December 22, 2017. Management early-adopted the ASU

Investment Securities

Investment Securities	12 Months Ended
	Dec. 31, 2018
Investment Securities [Abstract]
Investment Securities	NOTE B – INVESTMENT SECURITIES  The following tables set forth the amortized cost and estimated fair values of the Bank’s investment securities at December 31, 2018 and 2017.     2018  (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value  Held-to-Maturity Securities:  State and municipals $ 5,142 $ 36 $ — $ 5,178  Pass-through mortgage securities 267 11 — 278  Collateralized mortgage obligations 95 1 — 96  $ 5,504 $ 48 $ — $ 5,552  Available-for-Sale Securities:  State and municipals $ 422,235 $ 3,220 $ (5,417) $ 420,038  Pass-through mortgage securities 66,631 24 (1,169) 65,486  Collateralized mortgage obligations 154,378 886 (363) 154,901  Corporate bonds 119,000 — (1,410) 117,590  $ 762,244 $ 4,130 $ (8,359) $ 758,015      2017  Held-to-Maturity Securities:  State and municipals $ 6,970 $ 78 $ — $ 7,048  Pass-through mortgage securities 311 21 — 332  Collateralized mortgage obligations 355 14 — 369  $ 7,636 $ 113 $ — $ 7,749  Available-for-Sale Securities:  State and municipals $ 453,158 $ 10,051 $ (1,886) $ 461,323  Pass-through mortgage securities 72,539 84 (1,232) 71,391  Collateralized mortgage obligations 190,175 15 (2,776) 187,414  $ 715,872 $ 10,150 $ (5,894) $ 720,128  At December 31, 2018 and 2017, investment securities with a carrying value of $342,712,000 and $423,360,000 , respectively, were pledged as collateral to secure public deposits and borrowed funds.  There were no holdings of securities of any one issuer, other than the U.S. government and its agencies, in an amount greater than 10% of stockholders’ equity at December 31, 2018 and 2017 .  Securities With Unrealized Losses. The following tables set forth securities with unrealized losses at December 31, 2018 and 2017 presented by length of time the securities had been in a continuous unrealized loss position.      2018  Less than 12 Months 12 Months or More Total  (in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss  State and municipals $ 102,882 $ (1,639) $ 62,995 $ (3,778) $ 165,877 $ (5,417)  Pass-through mortgage securities 38,421 (142) 23,425 (1,027) 61,846 (1,169)  Collateralized mortgage obligations 32,577 (89) 7,342 (274) 39,919 (363)  Corporate bonds 97,590 (1,410) — — 97,590 (1,410)  Total temporarily impaired $ 271,470 $ (3,280) $ 93,762 $ (5,079) $ 365,232 $ (8,359)      2017  State and municipals $ 54,732 $ (574) $ 28,723 $ (1,312) $ 83,455 $ (1,886)  Pass-through mortgage securities 10,172 (81) 52,652 (1,151) 62,824 (1,232)  Collateralized mortgage obligations 130,267 (1,230) 54,751 (1,546) 185,018 (2,776)  Total temporarily impaired $ 195,171 $ (1,885) $ 136,126 $ (4,009) $ 331,297 $ (5,894)  Because the unrealized losses reflected in the preceding tables are deemed by management to be attributable to changes in interest rates and not credit losses, and because management does not have the intent to sell these securities and it is not more likely than not that it will be required to sell these securities before their anticipated recovery, the Bank does not consider these securities to be other-than-temporarily impaired at December 31, 2018.  Sales of Available-for-Sale Securities. Sales of available-for-sale securities were as follows:     (in thousands) 2018 2017 2016   Proceeds $ 263,994 $ 135,695 $ 62,047   Gains $ 300 $ 382 $ 1,869  Losses (10,706) (2,249) (18)  Net gain (loss) $ (10,406) $ (1,867) $ 1,851  The income tax expense (benefit) related to these net realized gains (losses) was ($2,907,000) , ($782,000) and $772,000 in 2018, 2017 and 2016, respectively, and is included in the consolidated statements of income in the line item, “Income tax expense.”  Sales of Held-to-Maturity Securities. During 2018, the Bank did not sell any securities that were classified as held-to-maturity.  During 2017, the Bank sold one municipal security that was classified as held-to-maturity. The sale was in response to a significant deterioration in the creditworthiness of the issuer. The security sold had a carrying value of $354,000 at the time of sale and the Bank realized a gain upon sale of $1,000 .  During 2016, the Bank sold one mortgage-backed security that was classified as held-to-maturity. The sale occurred after the Bank collected 85% or more of the principal amount outstanding at acquisition. The security sold had a carrying value of $106,000 at the time of sale and the Bank realized a gain upon sale of $17,000 .  Maturities. The following table sets forth by maturity the amortized cost and fair value of the Bank’s state and municipal securities and corporate bonds at December 31, 2018 based on the earlier of their stated maturity or, if applicable, their pre-refunded date. The remaining securities in the Bank’s investment securities portfolio are mortgage-backed securities, consisting of pass-through mortgage securities and collateralized mortgage obligations. Although these securities are expected to have substantial periodic repayments they are reflected in the table below in aggregate amounts.      (in thousands) Amortized Cost Fair Value  Held-to-Maturity Securities:  Within one year $ 3,059 $ 3,059  After 1 through 5 years 2,083 2,119  After 5 through 10 years — —  After 10 years — —  Mortgage-backed securities 362 374  $ 5,504 $ 5,552  Available-for-Sale Securities:  Within one year $ 47,839 $ 48,271  After 1 through 5 years 37,588 37,683  After 5 through 10 years 284,907 283,676  After 10 years 170,901 167,998  Mortgage-backed securities 221,009 220,387  $ 762,244 $ 758,015

Loans

Loans	12 Months Ended
	Dec. 31, 2018
Loans [Abstract]
Loans	NOTE C – LOANS  The following tables set forth by class of loans as of December 31, 2018 and 2017 the amount of loans individually and collectively evaluated for impairment and the portion of the allowance for loan losses allocable to such loans.      December 31, 2018  Loans Allowance for Loan Losses  (in thousands) Individually Evaluated for Impairment Collectively Evaluated for Impairment Ending Balance Individually Evaluated for Impairment Collectively Evaluated for Impairment Ending Balance  Commercial and industrial $ 22 $ 98,763 $ 98,785 $ — $ 1,158 $ 1,158  Commercial mortgages:  Multifamily — 756,714 756,714 — 5,851 5,851  Other — 433,330 433,330 — 3,783 3,783  Owner-occupied 520 90,731 91,251 — 743 743  Residential mortgages:  Closed end 1,814 1,807,837 1,809,651 16 18,828 18,844  Revolving home equity 743 66,967 67,710 — 410 410  Consumer and other 324 5,634 5,958 — 49 49  $ 3,423 $ 3,259,976 $ 3,263,399 $ 16 $ 30,822 $ 30,838      December 31, 2017  Commercial and industrial $ 48 $ 109,575 $ 109,623 $ — $ 1,441 $ 1,441  Commercial mortgages:  Multifamily — 682,593 682,593 — 6,423 6,423  Other — 414,783 414,783 — 4,734 4,734  Owner-occupied 531 95,100 95,631 — 1,076 1,076  Residential mortgages:  Closed end 1,368 1,557,196 1,558,564 18 19,329 19,347  Revolving home equity — 83,625 83,625 — 689 689  Consumer and other — 5,533 5,533 — 74 74  $ 1,947 $ 2,948,405 $ 2,950,352 $ 18 $ 33,766 $ 33,784   The following tables present the activity in the allowance for loan losses for the years ended December 31, 2018, 2017 and 2016.      (in thousands) Balance at 1/1/18 Chargeoffs Recoveries Provision for Loan Losses (Credit) Balance at 12/31/18  Commercial and industrial $ 1,441 $ 683 $ 34 $ 366 $ 1,158  Commercial mortgages:  Multifamily 6,423 — — (572) 5,851  Other 4,734 — — (951) 3,783  Owner-occupied 1,076 — — (333) 743  Residential mortgages:  Closed end 19,347 552 118 (69) 18,844  Revolving home equity 689 253 150 (176) 410  Consumer and other 74 9 4 (20) 49  $ 33,784 $ 1,497 $ 306 $ (1,755) $ 30,838      (in thousands) Balance at 1/1/17 Chargeoffs Recoveries Provision for Loan Losses (Credit) Balance at 12/31/17  Commercial and industrial $ 1,408 $ 102 $ 13 $ 122 $ 1,441  Commercial mortgages:  Multifamily 6,119 — — 304 6,423  Other 4,296 — — 438 4,734  Owner-occupied 959 820 — 937 1,076  Residential mortgages:  Closed end 15,740 97 3 3,701 19,347  Revolving home equity 1,401 100 — (612) 689  Consumer and other 134 27 3 (36) 74  $ 30,057 $ 1,146 $ 19 $ 4,854 $ 33,784      (in thousands) Balance at 1/1/16 Chargeoffs Recoveries Provision for Loan Losses (Credit) Balance at 12/31/16  Commercial and industrial $ 928 $ 445 $ 4 $ 921 $ 1,408  Commercial mortgages:  Multifamily 6,858 — — (739) 6,119  Other 3,674 — — 622 4,296  Owner-occupied 1,047 — — (88) 959  Residential mortgages:  Closed end 13,639 259 9 2,351 15,740  Revolving home equity 1,016 — 12 373 1,401  Consumer and other 94 5 5 40 134  $ 27,256 $ 709 $ 30 $ 3,480 $ 30,057  For individually impaired loans, the following tables set forth by class of loans at December 31, 2018, 2017 and 2016 the recorded investment, unpaid principal balance and related allowance. The tables also set forth the average recorded investment of individually impaired loans and interest income recognized while the loans were impaired during the years ended December 31, 2018, 2017 and 2016. The recorded investment is the unpaid principal balance of the loans less any interest payments applied to principal and any direct chargeoffs plus or minus net deferred loan costs and fees. Any principal and interest payments received on nonaccrual impaired loans are applied to the recorded investment in the loans. The Bank recognizes interest income on other impaired loans using the accrual method of accounting.      2018  (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized  With no related allowance recorded:  Commercial and industrial $ 22 $ 22 $ — $ 48 $ 3  Commercial mortgages - owner-occupied 520 604 — 530 25  Residential mortgages:  Closed end 1,561 1,573 — 1,566 5  Revolving home equity 743 747 — 754 —  Consumer and other 324 324 — 339 17  With an allowance recorded:  Residential mortgages - closed end 253 253 16 266 12  Total:  Commercial and industrial 22 22 — 48 3  Commercial mortgages - owner-occupied 520 604 — 530 25  Residential mortgages:  Closed end 1,814 1,826 16 1,832 17  Revolving home equity 743 747 — 754 —  Consumer and other 324 324 — 339 17  $ 3,423 $ 3,523 $ 16 $ 3,503 $ 62       2017  With no related allowance recorded:  Commercial and industrial $ 48 $ 48 $ — $ 67 $ 5  Commercial mortgages - owner-occupied 531 615 — 654 21  Residential mortgages - closed end 1,095 1,102 — 1,122 7  With an allowance recorded:  Residential mortgages - closed end 273 272 18 280 13  Total:  Commercial and industrial 48 48 — 67 5  Commercial mortgages - owner-occupied 531 615 — 654 21  Residential mortgages - closed end 1,368 1,374 18 1,402 20  $ 1,947 $ 2,037 $ 18 $ 2,123 $ 46      2016  With no related allowance recorded:  Commercial and industrial $ 131 $ 131 $ — $ 134 $ 1  Commercial mortgages - owner-occupied 558 636 — 575 —  Residential mortgages:  Closed end 230 313 — 245 —  Revolving home equity 280 279 — 280 —  With an allowance recorded:  Residential mortgages:  Closed end 626 634 45 641 29  Revolving home equity 1,490 1,491 482 1,493 —  Total:  Commercial and industrial 131 131 — 134 1  Commercial mortgages - owner-occupied 558 636 — 575 —  Residential mortgages:  Closed end 856 947 45 886 29  Revolving home equity 1,770 1,770 482 1,773 —  $ 3,315 $ 3,484 $ 527 $ 3,368 $ 30  Aging of Loans . The following tables present the aging of the recorded investment in loans by class of loans.      December 31, 2018  (in thousands) 30-59 Days Past Due 60-89 Days Past Due Past Due 90 Days or More and Still Accruing Nonaccrual Loans Total Past Due Loans & Nonaccrual Loans Current Total Loans  Commercial and industrial $ — $ 43 $ — $ — $ 43 $ 98,742 $ 98,785  Commercial mortgages:  Multifamily — — — — — 756,714 756,714  Other — — — — — 433,330 433,330  Owner-occupied — — — — — 91,251 91,251  Residential mortgages:  Closed end 864 — — 1,392 2,256 1,807,395 1,809,651  Revolving home equity — — — 743 743 66,967 67,710  Consumer and other 2 — — — 2 5,956 5,958  $ 866 $ 43 $ — $ 2,135 $ 3,044 $ 3,260,355 $ 3,263,399      December 31, 2017  Commercial and industrial $ 20 $ — $ — $ — $ 20 $ 109,603 $ 109,623  Commercial mortgages:  Multifamily — — — — — 682,593 682,593  Other — — — — — 414,783 414,783  Owner-occupied — — — — — 95,631 95,631  Residential mortgages:  Closed end 2,186 21 — 1,000 3,207 1,555,357 1,558,564  Revolving home equity 522 — — — 522 83,103 83,625  Consumer and other 7 — — — 7 5,526 5,533  $ 2,735 $ 21 $ — $ 1,000 $ 3,756 $ 2,946,596 $ 2,950,352  There were no loans in the process of foreclosure nor did the Bank hold any foreclosed residential real estate property at December 31, 2018 or 2017. In 2017, the Bank took a deed-in-lieu of foreclosure for one commercial real estate property. The property was recorded as other real estate owned at December 31, 2017 and had a carrying value of $5,125,000 , which was net of a valuation allowance of $725,000 . Other real estate owned at December 31, 2017 consisted solely of the property taken and was included in the consolidated balance sheet under “other assets.” The Bank sold the property for its carrying value in the first quarter of 2018.  Troubled Debt Restructurings. A restructuring constitutes a troubled debt restructuring when it includes a concession by the Bank and the borrower is experiencing financial difficulty. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. The Bank performs the evaluation under its internal underwriting policy.  The following table presents information about loans modified in troubled debt restructurings during the years ended December 31, 2018 and 2016. The Bank did not modify any loans in troubled debt restructurings during 2017.      Outstanding Recorded Investment Interest Rates  (dollars in thousands) Number of Loans Pre- Modification Post- Modification Pre- Modification Post- Modification  2018:  Residential mortgages - closed end 1 $ 432 $ 472 5.86% 4.50%  Consumer and other 1 350 350 6.50% 6.50%  2 $ 782 $ 822  2016:  Commercial and industrial 2 $ 1,131 $ 1,131 5.00% and 6.75% 5.00% and 6.75%  Residential mortgages - closed end 1 109 109 3.95% 3.95%  3 $ 1,240 $ 1,240  In 2018, the Bank consolidated an unsecured business line of credit, residential mortgage and home equity line of credit to a single borrower into a new first lien residential mortgage. The restructured residential mortgage resulted in a below market interest rate and extended term. Also in 2018, the Bank modified two consumer loans to a single borrower into one loan. The term of the restructured loan was extended for 12 months and the post-modification interest rate was lower than the current market rate for new debt with similar risk.  The 2016 troubled debt restructurings include the modification of a $1.0 million commercial and industrial loan into a new time loan which was subsequently repaid during 2016. The post-modification interest rates for all of the 2016 restructurings in the table above were lower than the current market rates for new debt with similar risk.  At December 31, 2018, 2017 and 2016, the Bank had an allowance for loan losses of $16,000 , $18,000 and $45,000 , respectively, allocated to specific troubled debt restructurings. The Bank had no commitments to lend additional amounts to loans that were classified as troubled debt restructurings.  There were no troubled debt restructurings for which there was a payment default during 2018, 2017 and 2016 that were modified during the twelve-month period prior to default. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms.  Risk Characteristics. Credit risk within the Bank’s loan portfolio primarily stems from factors such as changes in the borrower’s financial condition, credit concentrations, changes in collateral values, economic conditions and environmental contamination of properties securing mortgage loans. The Bank’s commercial loans, including those secured by real estate mortgages, are primarily made to small and medium-sized businesses. Such loans sometimes involve a higher degree of risk than those to larger companies because such businesses may have shorter operating histories, higher debt-to-equity ratios and may lack sophistication in internal record keeping and financial and operational controls. In addition, most of the Bank’s loans are made to businesses and consumers on Long Island and in the boroughs of New York City, and a large percentage of these loans are mortgage loans secured by properties located in those areas. The primary sources of repayment for residential and commercial mortgage loans include employment and other income of the borrowers, the businesses of the borrowers and cash flows from the underlying properties. In the case of multifamily mortgage loans, a substantial portion of the underlying properties are rent stabilized or rent controlled. These sources of repayment are dependent on, among other things, the strength of the local economy.  Credit Quality Indicators. The Corporation categorizes loans into risk categories based on relevant information about the borrower’s ability to service their debt including, but not limited to, current financial information of the borrower and any guarantors, payment experience, credit underwriting, documentation, public records, due diligence checks and current economic trends.  Commercial and industrial loans and commercial mortgage loans are risk rated utilizing a ten point rating system. The ten point risk rating system is described hereinafter.   Internally Assigned Risk Rating 1 – 2 Cash flow is of high quality and stable. Borrower has very good liquidity and ready access to traditional sources of credit. This category also includes loans to borrowers secured by cash and/or marketable securities within approved margin requirements. 3 – 4 Cash flow quality is strong, but shows some variability. Borrower has good liquidity and asset quality. Borrower has access to traditional sources of credit with minimal restrictions. 5 – 6 Cash flow quality is acceptable but shows some variability. Liquidity varies with operating cycle and assets provide an adequate margin of protection. Borrower has access to traditional sources of credit, but generally on a secured basis. 7 Watch - Cash flow has a high degree of variability and subject to economic downturns. Liquidity is strained and the ability of the borrower to access traditional sources of credit is diminished. 8 Special Mention - The borrower has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the Bank’s credit position at some future date. Special mention assets are not adversely classified and do not expose the Bank to risk sufficient to warrant adverse classification. 9 Substandard - Loans are inadequately protected by the current sound worth and paying capacity of the borrower or the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. 10 Doubtful - Loans have all the inherent weaknesses of those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable.  Risk ratings on commercial and industrial loans and commercial mortgages are initially assigned during the underwriting process and affirmed as part of the approval process. The ratings are periodically reviewed and evaluated based upon borrower contact, credit department review or independent loan review.  The Bank's loan risk rating and review policy establishes requirements for the annual review of commercial real estate and commercial and industrial loans. The requirements include details of the scope of coverage and selection process based on loan-type and risk rating. Among other things, at least 80% of the recorded investment of commercial real estate loans as of December 31 of the prior year must be reviewed annually. Lines of credit are also reviewed annually at each proposed reaffirmation. The frequency of the review of other loans is determined by the Bank’s ongoing assessments of the borrower’s condition.  Residential mortgage loans, revolving home equity lines and other consumer loans are risk rated utilizing a three point rating system. In most cases, the borrower’s credit score dictates the risk rating. However, regardless of credit score, loans that are on management’s watch list or have been criticized or classified by management are assigned a risk rating of 3. A credit score is a tool used in the Bank’s loan approval process, and a minimum score of 680 is generally required for new loans. Credit scores for each borrower are updated at least annually. The risk ratings along with their definitions are as follows:   Internally Assigned Risk Rating 1 Credit score is equal to or greater than 680. 2 Credit score is 635 to 679. 3 Credit score is below 635 or, regardless of credit score, the loan has been classified, criticized or placed on watch.  The following tables present the recorded investment in commercial and industrial loans and commercial real estate loans by class of loans and risk rating. Loans shown as Pass are all loans other than those risk rated Watch, Special Mention, Substandard or Doubtful.      December 31, 2018  Internally Assigned Risk Rating  Special  (in thousands) Pass Watch Mention Substandard Doubtful Total  Commercial and industrial $ 97,684 $ — $ 667 $ 434 $ — $ 98,785  Commercial mortgages:  Multifamily 756,714 — — — — 756,714  Other 417,838 14,194 1,298 — — 433,330  Owner-occupied 85,710 1,090 3,911 540 — 91,251  $ 1,357,946 $ 15,284 $ 5,876 $ 974 $ — $ 1,380,080      December 31, 2017  Commercial and industrial $ 108,846 $ 450 $ 279 $ 48 $ — $ 109,623  Commercial mortgages:  Multifamily 673,128 2,354 7,111 — — 682,593  Other 404,379 7,567 2,837 — — 414,783  Owner-occupied 93,618 — 1,482 531 — 95,631  $ 1,279,971 $ 10,371 $ 11,709 $ 579 $ — $ 1,302,630  The following tables present the recorded investment in residential mortgage loans, home equity lines and other consumer loans by class of loans and risk rating. Loans shown as Pass are all loans other than those risk rated Watch, Special Mention, Substandard or Doubtful.      December 31, 2018  Internally Assigned Risk Rating  Special  (in thousands) Pass Watch Mention Substandard Doubtful Total  Residential mortgages:  Closed end $ 1,807,525 $ 312 $ — $ 1,814 $ — $ 1,809,651  Revolving home equity 66,718 — 249 743 — 67,710  Consumer and other 4,958 — — 324 — 5,282  $ 1,879,201 $ 312 $ 249 $ 2,881 $ — $ 1,882,643      December 31, 2017  Internally Assigned Risk Rating  (in thousands) Pass Watch Special Mention Substandard Doubtful Total  Residential mortgages:  Closed end $ 1,554,168 $ 2,200 $ 828 $ 1,368 $ — $ 1,558,564  Revolving home equity 82,665 256 704 — — 83,625  Consumer and other 5,236 — — — — 5,236  $ 1,642,069 $ 2,456 $ 1,532 $ 1,368 $ — $ 1,647,425  Deposit account overdrafts were $676,000 and $297,000 at December 31, 2018 and 2017, respectively. They are not assigned a risk rating and are therefore excluded from consumer loans in the tables above.  Loans to Directors and Executive Officers. At December 31, 2018, there were no outstanding loans to directors, including their immediate families and companies in which they are principal owners, or executive officers. The aggregate outstanding amount of these loans was $36,000 at December 31, 2017, all of which was repaid in 2018. There were no loans to directors or executive officers that were nonaccrual at December 31, 2018 or 2017 .

Premises And Equipment

Premises And Equipment	12 Months Ended
	Dec. 31, 2018
Premises And Equipment [Abstract]
Premises And Equipment	NOTE D – PREMISES AND EQUIPMENT  Bank premises and equipment consist of the following:      December 31,  (in thousands) 2018 2017  Land $ 9,038 $ 9,038  Buildings and improvements 28,201 26,825  Leasehold improvements 14,175 12,652  Furniture and equipment 32,026 30,800  Construction in process 3,412 2,425  86,852 81,740  Accumulated depreciation and amortization (45,585) (42,092)  $ 41,267 $ 39,648

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Deposits	NOTE E – DEPOSITS  The following table sets forth the remaining maturities of the Bank’s time deposits at December 31, 2018.      Year (dollars in thousands) Less than $100,000 $100,000 or More Total  2019 $ 156,538 $ 126,721 $ 283,259  2020 18,285 48,379 66,664  2021 30,492 66,017 96,509  2022 10,489 17,981 28,470  2023 8,698 12,810 21,508  Thereafter 25,390 37,257 62,647  $ 249,892 $ 309,165 $ 559,057  Time deposits less than $100,000 in the table above include brokered certificates of deposit amounting to $100 million which mature in 2019. The total amount of time deposits that meet or exceed the FDIC insurance limit of $250,000 at December 31, 2018 and 2017 was $128.1 million and $75.1 million, respectively. Deposits from executive officers, directors and their affiliates at December 31, 2018 and 2017 were approximately $9.2 million and $9.4 million, respectively.

Borrowed Funds

Borrowed Funds	12 Months Ended
	Dec. 31, 2018
Borrowed Funds [Abstract]
Borrowed Funds	NOTE F – BORROWED FUNDS  The following table summarizes borrowed funds at December 31, 2018 and 2017.      December 31,  (in thousands) 2018 2017  Short-term borrowings:  Securities sold under repurchase agreements $ 8,923 $ 11,141  Federal Home Loan Bank advances 380,000 270,000  388,923 281,141  Long-term debt:  Securities sold under repurchase agreements — 5,000  Federal Home Loan Bank advances 362,027 418,797  362,027 423,797  $ 750,950 $ 704,938  Accrued interest payable on borrowed funds is included in “accrued expenses and other liabilities” in the consolidated balance sheets and amounted to $1,076,000 and $711,000 at December 31, 2018 and 2017, respectively.  Securities Sold Under Repurchase Agreements. Securities sold under repurchase agreements are short-term, fixed rate financing arrangements as of December 31, 2018.  The following table sets forth information concerning securities sold under repurchase agreements.      (dollars in thousands) 2018 2017  Average daily balance during the year $ 15,790 $ 15,903  Average interest rate during the year 1.31 % 1.77 %  Maximum month-end balance during the year $ 18,548 $ 19,188  Weighted average interest rate at year-end .05 % 1.72 %  At December 31, 2018, securities sold under repurchase agreements amounted to $8,923,000 with overnight contractual maturities and weighted average interest rates of 0.05% . The repurchase agreements are collateralized by $3.1 million of municipal securities.  Federal Home Loan Bank Advances. FHLB advances are collateralized by a blanket lien on residential and commercial mortgage loans with a lendable value of $2.3 billion and $2.0 billion at December 31, 2018 and 2017, respectively. Each advance is non-amortizing and, for those advances with a term greater than one day, subject to a prepayment penalty.  The following table sets forth information concerning FHLB advances.      (dollars in thousands) 2018 2017  Average daily balance during the year $ 607,797 $ 524,404  Average interest rate during the year 2.05 % 1.68 %  Maximum month-end balance during the year $ 742,027 $ 688,797  Weighted average interest rate at year-end 2.34 % 1.75 %  The following table sets forth as of December 31, 2018 the contractual maturities and weighted average interest rates of FHLB advances for each of the next five years and the period thereafter.      Contractual Maturity (dollars in thousands) Amount Weighted Average Rate  Overnight $ 230,000 2.60 %  2019 223,500 2.43  2020 82,750 1.84  2021 54,225 1.90  2022 75,872 2.05  2023 55,680 2.54  After 2023 20,000 2.01  512,027 2.22  $ 742,027 2.34 %  Other Borrowings. The Bank had no other borrowings at December 31, 2018 or 2017 . In 2018 and 2017, the average balance of other borrowings was de minimus.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Taxes [Abstract]
Income Taxes	NOTE G – INCOME TAXES  The Corporation, the Bank and the Bank’s subsidiaries, except for the REIT, file a consolidated federal income tax return. Income taxes charged to earnings in 2018, 2017 and 2016 had effective tax rates of 10.9%, 22.0% and 22.7% , respectively. The following table sets forth a reconciliation of the statutory federal income tax rate to the Corporation’s effective tax rate.       Year Ended December 31,  2018 2017 2016  Statutory federal income tax rate 21.0 % 35.0 % 35.0 %  State and local income taxes, net of federal income tax benefit (.8) 2.0 .9  Tax-exempt income, net of disallowed cost of funding (5.8) (10.2) (11.8)  BOLI income (1.2) (1.2) (.9)  Excess tax benefit of stock-based compensation (.9) (1.7) (.9)  Impact of cost segregation study (1.5) — —  Impact of federal tax reform on deferred taxes — (2.0) —  Other .1 .1 .4  10.9 % 22.0 % 22.7 %  During 2018, the Corporation completed a cost segregation study which enabled the acceleration of tax depreciation and resulted in a credit to income tax expense of $717,000 .  Upon enactment of the Tax Act on December 22, 2017, the Corporation recorded a $909,000 credit to income tax expense to reflect a decrease in its net deferred tax liability.  Provision for Income Taxes . The following table sets forth the components of the provision for income taxes.      Year Ended December 31,  (in thousands) 2018 2017 2016  Current:  Federal $ 5,975 $ 8,139 $ 7,407  State and local 688 636 409  6,663 8,775 7,816  Deferred:  Federal (458) 335 1,114  State and local (1,143) 779 119  (1,601) 1,114 1,233  $ 5,062 $ 9,889 $ 9,049  Net Deferred Tax Asset (Liability) . The following table sets forth the components of the Corporation’s net deferred tax asset (liability.)      December 31,  (in thousands) 2018 2017  Deferred tax assets:  Allowance for loan losses and off-balance-sheet credit exposure $ 9,312 $ 10,097  Stock-based compensation 1,384 1,382  Unrealized losses on available-for-sale securities 1,274 —  Accrued bonuses 686 —  Contract incentive 680 —  Net operating loss carryforwards 371 —  Unrealized loss on interest rate swap 341 —  Accrued rent expense 239 224  Asset writedown and other real estate owned valuation allowance 80 266  Directors' retirement expense 45 47  Supplemental executive retirement expense 36 17  Interest on nonperforming loans 16 55  Depreciation — 724  Accrued legal settlement — 12  14,464 12,824  Valuation allowance — —  14,464 12,824  Deferred tax liabilities:  Deferred loan costs 5,462 5,142  Prepaid pension 4,545 5,615  Depreciation 675 —  Deferred gain on Section 1031 exchange 276 —  Prepaid expenses 59 146  REIT spillover dividend — 3,043  Unrealized gains on available-for-sale securities — 1,259  11,017 15,205  Net deferred tax asset (liability) $ 3,447 $ (2,381)  The Corporation had no material unrecognized tax benefits at December 31, 2018, 2017 or 2016. The Corporation has not taken any tax positions for which it is reasonably possible that unrecognized tax benefits will significantly increase within the next twelve months.  The Corporation is subject to Federal, New York State, New York City, New Jersey and Connecticut income taxes. The Corporation did not incur any amounts for interest and penalties due taxing authorities for calendar years 2018, 2017 or 2016. During 2018 the Internal Revenue Service completed an examination of the Corporation’s 2015 federal income tax return with no changes.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2018
Regulatory Matters [Abstract]
Regulatory Matters	NOTE H – REGULATORY MATTERS  Minimum Regulatory Capital Requirements . The Corporation and the Bank are subject to the Basel III regulatory capital requirements issued by the Federal Reserve Board and the Office of the Comptroller of the Currency. These requirements are intended to ensure that the Corporation and the Bank maintain minimum ratios of Tier 1 capital to average assets as well as Common Equity Tier 1 capital, Tier 1 capital and Total capital to risk weighted assets. Failure to meet the minimum capital requirements can result in certain mandatory and possibly additional discretionary actions by the regulators that, if undertaken, could have a direct material effect on the financial statements of the Corporation and Bank.  Basel III includes guidelines with respect to the components of regulatory capital and calculation of risk weighted assets for balance sheet assets and liabilities and off-balance-sheet positions. The Corporation and the Bank exclude accumulated other comprehensive income (loss) components from Tier 1 and Total regulatory capital.  Basel III sets forth prompt corrective action (“PCA”) requirements for all banks and establishes a capital conservation buffer which is phased-in through 2019. The Corporation and the Bank exceeded the Basel III minimum capital adequacy requirements, including the capital conservation buffer of 1.875% applicable to the Bank for 2018. The most recent regulatory notifications categorized the Bank as well capitalized under the PCA provisions and there are no conditions or events since that notification that management believes have changed that category. The Corporation’s and the Bank’s actual capital amounts and ratios under the Basel III rules at December 31, 2018 and 2017 are presented in the table below.      2018  Actual Capital Minimum Capital Adequacy Requirement Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions  (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio  Tier 1 capital to average assets:  Consolidated $ 397,036 9.40 % $ 169,015 4.00 % N/A N/A  Bank 399,237 9.45 168,916 4.00 $ 211,145 5.00 %  Common equity tier 1 capital to risk weighted assets:  Consolidated 397,036 15.29 116,840 4.50 N/A N/A  Bank 399,237 15.38 116,820 4.50 168,741 6.50  Tier 1 capital to risk weighted assets:  Consolidated 397,036 15.29 155,786 6.00 N/A N/A  Bank 399,237 15.38 155,761 6.00 207,681 8.00  Total capital to risk weighted assets:  Consolidated 428,020 16.48 207,715 8.00 N/A N/A  Bank 430,221 16.57 207,681 8.00 259,601 10.00   2017  Tier 1 capital to average assets:  Consolidated $ 353,684 9.34 % $ 151,398 4.00 % N/A N/A  Bank 353,568 9.34 151,358 4.00 $ 189,197 5.00 %  Common equity tier 1 capital to risk weighted assets:  Consolidated 353,684 15.28 104,128 4.50 N/A N/A  Bank 353,568 15.29 104,051 4.50 150,296 6.50  Tier 1 capital to risk weighted assets:  Consolidated 353,684 15.28 138,837 6.00 N/A N/A  Bank 353,568 15.29 138,735 6.00 184,980 8.00  Total capital to risk weighted assets:  Consolidated 382,670 16.54 185,116 8.00 N/A N/A  Bank 382,533 16.54 184,980 8.00 231,225 10.00  Other Matters. A source of funds for dividend payments to shareholders is dividends received from the Bank. Banking regulations limit the amount of dividends that may be paid by the Bank without prior approval of regulatory agencies. Under these regulations, the amount of dividends that the Bank may pay in any calendar year is limited to the current year’s net profits, combined with the retained net profits of the preceding two years, subject to the minimum capital requirements described above. During 2019, the Bank could, without prior approval, declare dividends of approximately $52,340,000 plus any 2019 net profits retained to the date of the dividend declaration.  Regulation D of the Board of Governors of The Federal Reserve System requires banks to maintain reserves against certain deposit balances. The Bank’s average reserve requirement for 2018 was approximately $33,135,000 .

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2018
Stock-based Compensation [Abstract]
Stock-based Compensation	NOTE I – STOCK-BASED COMPENSATION  On April 22, 2014, the stockholders of the Corporation approved the 2014 Equity Incentive Plan (“2014 Plan”). Upon approval of the 2014 Plan, no further awards could be made under the 2006 Stock Compensation Plan (“2006 Plan”).  2014 Plan. Under the 2014 Plan, awards may be granted to employees and non-employee directors as non-qualified stock options (“NQSOs”), stock appreciation rights (“SARs”), restricted stock awards, RSUs, or any combination thereof, any of which may be subject to performance-based vesting conditions. Awards may also be granted to employees as incentive stock options (“ISOs”). The exercise price of stock options and SARs granted under the 2014 Plan may not be less than the fair market value of the Corporation’s common stock on the date the stock option or SAR is granted. The 2014 Plan is administered by the Compensation Committee of the Board of Directors. Substantially all of the awards granted to date under the 2014 Plan are RSUs. All awards granted under the 2014 Plan will immediately vest upon an involuntary termination following a change in control, total and permanent disability, as defined, or death, and with certain exceptions, will immediately vest in the event of retirement, as defined.  The Corporation has 2,250,000 shares of common stock reserved for awards under the 2014 Plan. Awards granted under the 2006 Plan that expire or are forfeited after April 22, 2014 will be added to the number of shares of common stock reserved for issuance of awards under the 2014 Plan. All of the 2,250,000 shares may be issued pursuant to the exercise of stock options or SARs. A maximum of 787,500 shares may be issued as restricted stock awards or RSUs. At December 31, 2018, 1,860,384 equity awards remain available to be granted under the 2014 Plan of which 405,777 may be granted as restricted stock awards or RSUs.  Details of RSUs. The following table summarizes the vesting schedule of RSUs outstanding at December 31, 2018.      Granted During the Year Ended December 31,  Total 2018 2017 2016  Number of RSUs :  Granted 272,291 70,688 94,329 107,274  Outstanding at December 31, 2018 215,084 65,390 76,033 73,661   Vested and convertible at December 31, 2018 80,348 14,233 — 66,115  Scheduled to vest during:  2019 91,581 21,178 62,857 7,546  2020 18,708 8,782 9,926 —  2021 24,447 21,197 3,250 —  215,084 65,390 76,033 73,661  The RSUs in the table above include performance-based RSUs with vesting based on the financial performance of the Corporation in 2018 and 2019 and service-based RSUs with various service-based vesting periods. The grant date fair value of RSUs awarded in 2016 is equal to the market price of the shares underlying the awards on the grant date. The grant date fair value of RSUs awarded in 2018 and 2017 is equal to the market price of the shares underlying the awards on the grant date, discounted for dividends that are not paid on these RSUs. The fair values of awards made in 2018, 2017 and 2016, as well as the assumptions utilized in determining such values, is presented below.     2018  Performance-Based Service-Based  Vesting Vesting  Grant date fair value $27.09 $27.09 to $27.33  Market price on grant date $28.25 $28.25 to $28.50  Expected annual dividend $.60 $.60  Expected term (in years) 2.0 2.0 to 3.0  Risk-free interest rate 2.02% 1.89% to 2.02%   2017  Grant date fair value $26.27 $25.35 to $26.00  Market price on grant date $27.90 $27.50 to $28.15  Expected annual dividend $.56 $.56  Expected term (in years) 3.0 3.0 to 4.0  Risk-free interest rate 1.49% 1.60% to 1.67%   2016  Grant date fair value $18.17 $18.17 to $22.17  Market price on grant date $18.17 $18.17 to $22.17  In January 2019, 107,511 RSUs were awarded under the 2014 Plan, including 47,072 performance-based RSUs and 60,439 service-based RSUs.  The following table presents a summary of RSUs outstanding at December 31, 2018 and changes during the year then ended.     Weighted-  Weighted- Average Aggregate  Average Remaining Intrinsic  Number of Grant-Date Contractual Value  RSUs Fair Value Term (yrs.) (in thousands)  Outstanding at January 1, 2018 274,134 $ 19.64  Granted 70,688 27.10  Converted (107,722) 15.58  Forfeited (22,016) 22.86  Outstanding at December 31, 2018 215,084 $ 23.79 0.68 $ 4,291  Vested and Convertible at December 31, 2018 80,348 $ 19.76 — $ 1,603  The performance-based RSUs granted in 2018 and 2017 have a maximum payout potential of 1.50 and 1.25 shares, respectively, of the Corporation’s common stock for each RSU awarded. All other RSUs outstanding at December 31, 2018 have a maximum payout potential of one share of the Corporation’s common stock for each RSU awarded. RSUs outstanding at December 31, 2018 include 80,348 RSUs that were vested and convertible into common stock at year-end and 134,736 RSUs that are currently expected to vest and become convertible in the future. The total intrinsic value of RSUs converted in 2018, 2017 and 2016 was $3,035,000 , $1,779,000 and $1,445,000 , respectively.  2006 Plan. The 2006 Plan was approved by the stockholders of the Corporation on April 18, 2006. The 2006 Plan permitted the granting of stock options, SARs, restricted stock awards and RSUs to employees and non-employee directors. Under the terms of the 2006 Plan, stock options and SARs could not have an exercise price that was less than 100% of the fair market value of one share of the underlying common stock on the date of grant. Through December 31, 2011, equity grants to executive officers and directors under the 2006 Plan consisted of a combination of NQSOs and RSUs, while equity grants to other officers consisted solely of NQSOs. Beginning in 2012, equity grants under the 2006 Plan consisted solely of RSUs. Stock options granted under the 2006 Plan have a five year vesting period and a ten year term.  Fair Value of Stock Options. The grant date fair value of options was estimated on the date of grant using the Black-Scholes option pricing model. Substantially all outstanding stock options were expensed in prior years.  Stock Option Activity. The following table presents a summary of options outstanding at December 31, 2018 and changes during the year then ended.     Weighted-  Weighted- Average Aggregate  Average Remaining Intrinsic  Number of Exercise Contractual Value  Options Price Term (yrs.) (in thousands)  Outstanding at January 1, 2018 159,807 $ 11.35  Exercised (63,695) 10.66  Outstanding at December 31, 2018 96,112 $ 11.80 1.40 $ 783  Exercisable at December 31, 2018 95,812 $ 11.79 1.38 $ 782   All options outstanding at December 31, 2018 are either fully vested or expected to vest. The total intrinsic value of options exercised in 2018, 2017 and 2016 was $900,000 , $1,833,000 and $853,000 , respectively. Cash received from option exercises in 2018, 2017 and 2016, was $312,000 , $917,000 and $906,000 , respectively. Tax benefits from stock option exercises were $271,000 , $767,000 and $356,000 in 2018, 2017 and 2016, respectively.  Compensation Expense. The Corporation recorded compensation expense for share-based payments of $1,814,000 , $2,434,000 and $1,517,000 in 2018, 2017 and 2016, respectively, and related income tax benefits of $547,000 , $1,019,000 and $637,000 , respectively.  Unrecognized Compensation Cost. As of December 31, 2018, there was $1,009,000 of total unrecognized compensation cost related to non-vested equity awards comprised of $1,000 for options and $1,008,000 for RSUs. The total cost is expected to be recognized over a weighted-average period of 1.39 years which is based on weighted average periods of 1.43 years and 1.39 years for options and RSUs, respectively.  Other. No cash was used to settle stock options in 2018, 2017 or 2016. The Corporation uses newly issued shares to settle stock option exercises and for the conversion of RSUs. During 2018 and 2017, 2,747 and 2,060 shares, respectively, of the Corporation’s common stock were issued to a member of the Board of Directors in payment of director fees.

Retirement Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2018
Retirement Plans [Abstract]
Retirement Plans	NOTE J – RETIREMENT PLANS  The Bank has a 401(k) plan, defined benefit pension plan and supplemental executive retirement plan. Employees are immediately eligible to participate in the 401(k) plan provided they are at least 18 years of age. Participants may elect to contribute, on a tax-deferred basis, up to 100% of gross compensation, as defined, subject to the limitations of Section 401(k) of the Internal Revenue Code. The Bank may, at its sole discretion, make matching contributions to each participant's account based on the amount of the participant's tax deferred contributions. Participants are fully vested in their elective contributions and, after five years of participation in the 401(k) plan, are fully vested ( 20% vesting per year) in the matching contributions, if any, made by the Bank. The Bank’s expense for matching contributions was $486,000 , $441,000 and $396,000 for 2018, 2017 and 2016, respectively. The Bank has a defined benefit pension plan (“Pension Plan” or “Plan”). An internal management committee (the “Committee”) oversees the affairs of the Plan and acts as named fiduciary. The Committee has retained Vanguard Group, Inc., including its subsidiaries and affiliates (“Vanguard”), to act as discretionary investment agent, trustee and custodian for the Plan. Vanguard has formulated investment recommendations customized to meet the Committee’s objectives and, after approval by the Committee, such investment recommendations are incorporated into the investment guidelines and policies contained in the investment management agreement between the Bank and Vanguard (the “Investment Management Agreement”). The Committee utilizes a formal Investment Policy Statement which includes, among other things, the investment guidelines and policies contained in the Investment Management Agreement. The Investment Policy Statement is periodically revised by the Committee as deemed appropriate.  Employees are eligible to participate in the Pension Plan after attaining 21 years of age and completing 12 full months of service. Pension benefits are generally based on a percentage of average annual compensation during the period of creditable service. The Bank makes contributions to the Pension Plan which, when taken together with participant contributions equal to 2% of their compensation, will be sufficient to fund these benefits. The Bank’s funding method, the unit credit actuarial cost method, is consistent with the funding requirements of applicable federal laws and regulations which set forth both minimum required and maximum tax deductible contributions. Employees become fully vested after four years of participation in the Pension Plan ( no vesting occurs during the four-year period).  Significant Actuarial Assumptions . The following table sets forth the significant actuarial assumptions used to determine the benefit obligation at December 31, 2018, 2017 and 2016 and the benefit cost for each of the Plan years then ended.     2018 2017 2016  Weighted average assumptions used to determine the  benefit obligation at year end:  Discount rate 4.53% 3.93% 4.40%  Rate of increase in compensation levels 3.50% 3.50% 3.50%   Weighted average assumptions used to determine net pension cost:  Discount rate 3.93% 4.40% 4.54%  Rate of increase in compensation levels 3.50% 3.50% 3.50%  Expected long-term rate of return on plan assets 5.50% 5.50% 6.00%  The increase in the discount rate from 3.93% in 2017 to 4.53% in 2018 decreased the projected benefit obligation at December 31, 2018 by approximately $3,093,000 . In calculating the benefit obligation at December 31, 2018, the mortality table previously utilized, RP-2014 Healthy Annuitant/Employee Mortality Table with Projection Scale MP-2017, was adjusted to reflect Scale MP-2018. The updated mortality table decreased the projected benefit obligation at December 31, 2018 by approximately $133,000 .  The decrease in the discount rate from 4.40% in 2016 to 3.93% in 2017 increased the projected benefit obligation at December 31, 2017 by approximately $2,377,000 . In calculating the benefit obligation at December 31, 2017, the mortality table previously utilized, RP-2014 Healthy Annuitant/Employee Mortality Table with Projection Scale MP-2016, was adjusted to reflect Scale MP-2017. The updated mortality table decreased the projected benefit obligation at December 31, 2017 by approximately $277,000 .  The decrease in the discount rate from 4.54% in 2015 to 4.40% in 2016 increased the projected benefit obligation at December 31, 2016 by $643,000 . In calculating the benefit obligation at December 31, 2016, the mortality table previously utilized, RP-2014 Healthy Annuitant/Employee Mortality Table with Projection Scale MP-2015, was adjusted to reflect Scale MP-2016. The updated mortality table decreased the projected benefit obligation at December 31, 2016 by approximately $536,000 . In addition, a change in the withdrawal/turnover assumption from the T-3 table of the Pension Actuary’s Handbook to the 2003 SOA Pension Plan Turnover Table decreased the projected benefit obligation at December 31, 2016 by $157,000 .  Net Pension Cost. The following table sets forth the components of net periodic pension cost.      (in thousands) 2018 2017 2016  Service cost plus expected expenses and net of expected plan  participant contributions $ 1,369 $ 1,214 $ 1,142  Interest cost 1,587 1,590 1,584  Expected return on plan assets (3,275) (2,940) (2,953)  Amortization of net actuarial loss — 18 244  Net pension cost (credit) $ (319) $ (118) $ 17  As a result of the adoption of ASU 2017-07, for all periods presented, the components of net pension credit other than the service cost component were included in the line item “Other noninterest income” in the consolidated statements of income. The service cost component was included in the line item “Salaries” in the consolidated statements of income. See “Note A – Summary of Significant Accounting Policies” for more information regarding the provisions of ASU 2017-07.  The net actuarial loss for the defined benefit plan that will be amortized from accumulated other comprehensive income (loss) into net periodic pension cost in 2019 is $352,000 . Prior service cost was fully amortized from accumulated other comprehensive income (loss) into net periodic pension cost as of December 31, 2014.  Funded Status of the Plan . The following table sets forth the change in the projected benefit obligation and Plan assets for each year and, as of the end of each year, the funded status of the Plan and accumulated benefit obligation.      (in thousands) 2018 2017 2016  Change in projected benefit obligation:  Projected benefit obligation at beginning of year $ 41,384 $ 37,016 $ 35,684  Service cost 1,533 1,386 1,283  Interest cost 1,587 1,590 1,584  Benefits paid (1,574) (1,510) (1,364)  Assumption changes (3,226) 2,100 (50)  Experience loss (gain) and other 766 802 (121)  Projected benefit obligation at end of year 40,470 41,384 37,016   Change in fair value of plan assets:  Fair value of plan assets at beginning of year 60,536 54,332 50,021  Actual return on plan assets (3,563) 7,497 3,919  Employer contributions — — 1,553  Plan participant contributions 333 321 301  Benefits paid (1,574) (1,510) (1,365)  Expenses (108) (104) (97)  Fair value of plan assets at end of year 55,624 60,536 54,332  Funded status at end of year $ 15,154 $ 19,152 $ 17,316  Accumulated benefit obligation $ 38,042 $ 38,544 $ 34,451  During 2018, the Bank did not make a contribution to the Plan and the Bank has no minimum required pension contribution for the Plan year ending September 30, 2019. It’s maximum tax-deductible contribution for the tax year beginning January 1, 2019 is $7,700,000 . The contribution the Bank will make in 2019, if any, has not yet been determined.  Plan Assets. The objective for the Plan’s assets is to generate long-term investment returns from both income and capital appreciation which outpaces the rate of inflation, while maintaining sufficient liquidity to ensure the Plan’s ability to pay all anticipated benefit and expense obligations when due. The Plan will maintain a de minimis amount of cash equivalents, with the remaining assets allocated across two broadly-defined financial asset categories: (1) equity, both domestic and international; and (2) fixed income of various durations and issuer type. The goal of the equity allocation is to supplement the Bank’s contributions to the Plan when the Plan is underfunded and increase surplus when the Plan is overfunded. The fixed income component will include longer-duration bonds designed to match and hedge the characteristics of the Plan’s liabilities. Cash equivalents, under normal circumstances, will be temporary holdings for the purpose of paying expenses and monthly benefits.  For fixed income investments: (1) the minimum average credit quality shall be investment grade (Standard & Poor’s BBB or Moody’s Baa) or higher; and (2) no more than 5% of the portfolio may be invested in securities with ratings below investment grade, and none may be rated below investment grade at the time of purchase.  Reasonable precautions are taken to avoid excessive concentrations to protect the portfolio against unfavorable outcomes within an asset class. Specifically, the following guidelines are in place:  · With the exception of fixed income investments explicitly guaranteed by the U.S. government, no single investment security shall represent more than 5% of total Plan assets; and · With the exception of passively managed investment vehicles seeking to match the returns of broadly diversified market indices or diversified investment vehicles chosen specifically to hedge the interest rate risk embedded in Plan liabilities, no single investment pool or investment company (mutual fund) shall comprise more than 10% of total plan assets.  The portfolio will be rebalanced to the target asset allocation, if needed, no less often than quarterly. Unless expressly authorized in writing by the Committee, the following investing activities are prohibited:  · Purchasing securities on margin; · Pledging or hypothecating securities, except for loans of securities that are fully collateralized; · Purchasing or selling derivative securities for speculation or leverage; and · Engaging in investment strategies that have the potential to amplify or distort the risk of loss beyond a level that is reasonably expected given the objectives of the portfolio.  The Plan’s actual asset allocations, target allocations and expected long-term rates of return by asset category at December 31, 2018 and 2017 are set forth in the tables that follow.     December 31, 2018  Target Allocation Percentage of Plan Assets Weighted Average Expected Long-term Rates of Return  Cash equivalents 0% - 1% .2% <1.00%  Equity mutual funds 15% - 25% 18.1% 5.9% to 8.3%  Fixed income mutual funds 75% - 85% 81.7% 3.8% to 5.0%  100.0% 4.2% to 5.6%   December 31, 2017  Cash equivalents 0% - 1% .2% <1.00%  Equity mutual funds 15% - 25% 20.1% 6.2% to 8.4%  Fixed income mutual funds 75% - 85% 79.7% 3.4% to 4.4%  100.0% 4.5% to 5.5%  The ranges for the weighted average expected long-term rates of return for equity funds, bond funds and total plan assets set forth in the preceding table represent expected 25 th to 75 th percentile returns provided by Vanguard. For these purposes Vanguard utilizes a proprietary capital markets model (the “model”) developed and maintained by Vanguard’s primary investment research and advice teams. The model forecasts distributions of future returns for a wide array of broad asset classes. The theoretical and empirical foundation of the model is that the returns of various asset classes reflect the compensation investors require for bearing different types of systematic risk. At the core of the model are estimates of the dynamic statistical relationship between risk factors and asset returns, obtained from statistical analysis based on available historical monthly financial and economic data.  At December 31, 2018, the equity and fixed income components of Plan assets consist of the following Vanguard institutional funds:  Equity  · Vanguard Total Stock Market Index Fund (VITSX). This fund seeks to track the performance of the Center for Research in Security Prices (CRSP) U.S. Total Market Index. The fund is passively managed using index sampling and consists of large, small and mid-cap equity securities diversified across growth and value styles. · Vanguard Total International Stock Index Fund (VTSNX). This fund seeks to track the performance of the Financial Times Stock Exchange (FTSE) Global All Cap ex U.S. Index. The fund is passively managed and includes broad exposure across developed and emerging non-U.S. equity markets.  Fixed Income  · Vanguard Long-Term Investment-Grade Fund (VWETX). This fund seeks high and sustainable current income. Investments are selected using a fundamental, bottom-up credit selection process and consist of long-term, high-quality bonds broadly diversified by issuer and industry sector. · Vanguard Long-Term Bond Index Fund (VBLLX). This fund seeks high current income with high credit quality and to track the performance of the Barclays U.S. Long Government/Credit Float Adjusted Index. The fund is passively managed using index sampling and includes diversified exposure to long-term, investment-grade U.S. bond market instruments. Obligations of the U.S. government make up a significant portion of the fund’s holdings.  Fair Value of Plan Assets. The fair value of the Plan assets at December 31, 2018 and 2017, by asset category, is summarized below.      Fair Value Measurements Using:  (in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  December 31, 2018:  Cash equivalents:  Vanguard Prime Money Market Mutual Fund $ 137 $ — $ 137 $ —  Total cash equivalents 137 — 137 —  Equity mutual funds:  Vanguard Total Stock Market Index Fund (VITSX) 5,513 5,513 — —  Vanguard Total International Stock Index Fund (VTSNX) 4,539 4,539 — —  Total equity mutual funds 10,052 10,052 — —  Fixed income mutual funds:  Vanguard Long-Term Investment Grade Fund (VWETX) 27,260 27,260 — —  Vanguard Long-Term Bond Index Fund (VBLLX) 18,175 18,175 — —  Total fixed income mutual funds 45,435 45,435 — —  Total Plan Assets $ 55,624 $ 55,487 $ 137 $ —   December 31, 2017:  Cash equivalents:  Vanguard Prime Money Market Mutual Fund $ 117 $ — $ 117 $ —  Total cash equivalents 117 — 117 —  Equity mutual funds:  Vanguard Total Stock Market Index Fund (VITSX) 6,658 6,658 — —  Vanguard Total International Stock Index Fund (VTSNX) 5,479 5,479 — —  Total equity mutual funds 12,137 12,137 — —  Fixed income mutual funds:  Vanguard Long-Term Investment Grade Fund (VWETX) 29,065 29,065 — —  Vanguard Long-Term Bond Index Fund (VBLLX) 19,217 19,217 — —  Total fixed income mutual funds 48,282 48,282 — —  Total Plan Assets $ 60,536 $ 60,419 $ 117 $ —  The fair values of the Vanguard mutual funds represent their net asset values (“NAV”) at December 31, 2018 and 2017. On an ongoing basis, the Plan has the ability to readily redeem its investments in these funds at their NAV per share with no advance notification.  An explanation of matrix pricing and the definitions of Level 1, 2 and 3 fair value measurements are included in “Note M – Fair Value of Financial Instruments” to these consolidated financial statements. At both December 31, 2018 and 2017 , the Plan’s cash and cash equivalents amounted to .2% of the Plan’s total assets and represented investments in the Vanguard Prime Money Market Mutual Fund.  Estimated Future Benefit Payments. The following benefit payments, which reflect expected future service as appropriate, are expected to be made by the Plan.      Year (dollars in thousands) Amount  2019 $ 1,926  2020 2,067  2021 2,169  2022 2,346  2023 2,542  2024 - 2028 14,372  The Bank’s Supplemental Executive Retirement Plan (“SERP”) currently covers the Bank’s Chief Executive Officer (“CEO”). The benefit under the SERP is equal to the additional amount that the CEO would be entitled to under the Pension and 401(k) plans in the absence of Internal Revenue Code limitations. SERP expense was $285,000 , $31,000 and $197,000 in 2018, 2017 and 2016, respectively.

Other Operating Expenses

Other Operating Expenses	12 Months Ended
	Dec. 31, 2018
Other Operating Expenses [Abstract]
Other Operating Expenses	NOTE K – OTHER OPERATING EXPENSES  Expenses included in other operating expenses that exceed one percent of the aggregate of total interest income and noninterest income in one or more of the years shown are as follows:      (in thousands) 2018 2017 2016  Computer services $ 1,987 $ 1,888 $ 2,631  Marketing 1,414 1,442 1,053  FDIC assessment 1,222 1,178 1,379  Consultants 542 702 1,337

Commitments And Contingent Liab

Commitments And Contingent Liabilities	12 Months Ended
	Dec. 31, 2018
Commitments And Contingent Liabilities [Abstract]
Commitments And Contingent Liabilities	NOTE L – COMMITMENTS AND CONTINGENT LIABILITIES  Financial Instruments With Off-Balance-Sheet Risk. In the normal course of business, the Bank enters into various types of off-balance-sheet arrangements to meet the financing needs of its customers. These off-balance-sheet financial instruments include commitments to extend credit, standby letters of credit and commercial letters of credit. These instruments involve varying degrees of credit risk in excess of the amount recognized in the consolidated balance sheets and expose the Bank to credit loss in the event of nonperformance by the Bank’s customers. The Bank's exposure to credit loss is represented by the contractual notional amount of these instruments. The Bank uses the same credit policies in making commitments to extend credit, and generally uses the same credit policies for letters of credit, as it does for on-balance sheet instruments such as loans.  At December 31, 2018 and 2017, financial instruments whose contract amounts represent credit risk are as follows:      2018 2017  (in thousands) Fixed Rate Variable Rate Fixed Rate Variable Rate  Commitments to extend credit $ 31,496 $ 204,072 $ 90,635 $ 227,385  Standby letters of credit 3,670 — 4,244 —  A commitment to extend credit is a legally binding agreement to lend to a customer as long as there is no violation of any condition established in the contract. Unused home equity, small business and commercial lines of credit are a large component of the Bank’s variable rate loan commitments. Since some of the commitments to extend credit and letters of credit are expected to expire without being drawn upon and, with respect to unused lines of credit, can be frozen, reduced or terminated by the Bank based on the financial condition of the borrower, the total commitment amounts do not necessarily represent future cash requirements. Home equity lines generally expire ten years from their date of origination and small business lines generally have a three-year term. Other real estate loan commitments generally expire within 60 days and commercial line commitments generally expire within one year. At December 31, 2018, the Bank’s fixed rate loan commitments are to make loans with interest rates ranging from 4.00% to 4.75% and maturities of ten years or more. The amount of collateral obtained, if any, by the Bank upon extension of credit is based on management’s credit evaluation of the borrower. Collateral held varies but may include mortgages on commercial and residential real estate, securities, deposit accounts with the Bank or other financial institutions and security interests in business assets and equipment.  Standby letters of credit are conditional commitments issued by the Bank to assure the performance or financial obligations of a customer to a third party. The Bank's standby letters of credit extend through February 2020. The credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loans to customers. The Bank generally holds collateral and/or obtains personal guarantees supporting these commitments. The extent of collateral held for these commitments at December 31, 2018 varied from 50% to 100% of the contractual notional amount of each instrument, with the average amount of collateral totaling 96% of the aggregate outstanding notional amount. Standby letters of credit are considered financial guarantees and are recorded at fair value.  Employment Agreements. At December 31, 2018, the chief executive officer, senior executive vice president and four of the Corporation’s other executive vice presidents, collectively referred to as the senior executives, had employment agreements with the Corporation under which they are entitled to severance compensation in the event that their employment is terminated without cause or they terminate their employment following an event constituting Good Reason, as defined. The chief executive officer’s employment agreement has a term of three calendar years beginning January 1, 2017. Each of the other senior executives has an employment agreement with a term of two calendar years beginning either January 1, 2017 or January 1, 2018. These two-year employment agreements automatically renew for an additional period of one year on each anniversary date unless the Corporation gives written notice of non-renewal at least 30 days prior to such date. Notwithstanding the foregoing, each of these two-year employment agreements expire on December 31 of the calendar year in which the executive attains normal retirement age (“Retirement Age Termination Date”), which for these purposes is age 65. The senior executive vice president’s employment agreement has been extended for two years beyond its Retirement Age Termination Date of December 31, 2019. At the appropriate time and at its option, the Corporation can extend the other two -year employment agreements for two years beyond their retirement age termination dates. The current aggregate annual salaries provided for in these employment agreements is $2,222,000 .   Lease Commitments. At December 31, 2018, minimum annual rental commitments under non-cancelable operating leases are as follows:      Year (dollars in thousands) Amount  2019 $ 2,986  2020 2,925  2021 2,816  2022 2,781  2023 2,419  Thereafter 8,117  $ 22,044  The Bank has various renewal options on the above leases. Rent expense, including amounts paid for real estate taxes and common area maintenance, was $2,966,000 , $2,466,000 and $2,085,000 in 2018, 2017 and 2016, respectively.  Related Party Leases. Buildings occupied by two of the Bank’s branch offices are leased from a director of the Corporation and the Bank. The leases expire on October 31, 2022 and December 31, 2019 with options to renew. The Bank expects to renew both leases prior to their expiration. Aggregate base rent expense for these leases, plus a proportionate share of real estate taxes on one of the leased properties, amounted to approximately $78,000 for each of the years ending December 31, 2018, 2017 and 2016. The Corporation believes that the terms of the leases are comparable to competitive terms that could have been obtained from an unrelated third party.  Litigation. The Corporation is a named defendant in several legal actions incidental to the business. For some of these actions there is a possibility that the Corporation will sustain a financial loss. Management believes that none of the possible losses are material.

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Of Financial Instruments [Abstract]
Fair Value Of Financial Instruments	NOTE M – FAIR VALUE OF FINANCIAL INSTRUMENTS  Financial Instruments Recorded at Fair Value . When measuring fair value, the Corporation uses a fair value hierarchy, which is designed to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy involves three levels of inputs that may be used to measure fair value:  Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Corporation has the ability to access at the measurement date.  Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs other than quoted prices that are observable or can be corroborated by observable market data.  Level 3: Significant unobservable inputs that reflect the Corporation’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.  The Corporation deems transfers between levels of the fair value hierarchy to have occurred on the date of the event or change in circumstance that caused the transfer. There were no transfers between levels of the fair value hierarchy in either 2018 or 2017.  The fair values of the Corporation’s investment securities designated as available-for-sale at December 31, 2018 and 2017 are set forth in the tables that follow. These values are determined on a recurring basis using matrix pricing (Level 2 inputs). Matrix pricing, which is a mathematical technique widely used in the industry to value debt securities, does not rely exclusively on quoted prices for the specific securities but rather on the relationship of such securities to other benchmark quoted securities.      Fair Value Measurements Using:  (in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  December 31, 2018:  Financial Assets:  Available-for-Sale Securities:  State and municipals $ 420,038 $ — $ 420,038 $ —  Pass-through mortgage securities 65,486 — 65,486 —  Collateralized mortgage obligations 154,901 — 154,901 —  Corporate bonds 117,590 117,590  $ 758,015 $ — $ 758,015 $ —  Financial Liabilities:  Derivative - interest rate swap $ 1,130 $ — $ 1,130 $ —   December 31, 2017:  Financial Assets:  Available-for-Sale Securities:  State and municipals $ 461,323 $ — $ 461,323 $ —  Pass-through mortgage securities 71,391 — 71,391 —  Collateralized mortgage obligations 187,414 — 187,414 —  $ 720,128 $ — $ 720,128 $ —  There were no assets measured at fair value on a nonrecurring basis at December 31, 2018. Assets measured at fair value on a nonrecurring basis at December 31, 2017 are set forth in the table that follows. Real estate appraisals utilized in measuring the fair value of other real estate and impaired loans may employ a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. In arriving at fair value, the Corporation adjusts the value set forth in the appraisal by deducting costs to sell and a distressed sale adjustment when appropriate. The adjustments made by the appraisers and the Corporation are deemed to be significant unobservable inputs and therefore result in a Level 3 classification of the inputs used for determining the fair value of impaired loans and other real estate owned. Because the Corporation has no impaired loans or other real estate owned measured at fair value at December 31, 2018, the impact of unobservable inputs on the Corporation’s financial statements is not material.      Fair Value Measurements Using:  (in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  December 31, 2017:  Other real estate owned $ 5,125 $ — $ — $ 5,125  The other real estate owned in the preceding table is one commercial real estate property acquired by deed-in-lieu of foreclosure at a fair value of $5,850,000 in the fourth quarter of 2017. A valuation allowance of $725,000 was subsequently recorded and is included in other noninterest expense in the consolidated statements of income for the year ended December 31, 2017. The Bank sold the property for its carrying value in the first quarter of 2018.  The Corporation had no impaired loans recorded at fair value at December 31, 2018 or 2017. During the years ended December 31, 2017 and 2016, the Corporation recorded provisions (credits) for loan losses of ($482,000) and $449,000 , respectively, for impaired loans measured at fair value. No such provisions were recorded in 2018.  Financial Instruments Not Recorded at Fair Value. Fair value estimates are made at a specific point in time. Such estimates are generally subjective in nature and dependent upon a number of significant assumptions associated with each financial instrument or group of similar financial instruments, including estimates of discount rates, liquidity, risks associated with specific financial instruments, estimates of future cash flows, and relevant available market information. Changes in assumptions could significantly affect the estimates. In addition, fair value estimates do not reflect the value of anticipated future business, premiums or discounts that could result from offering for sale at one time the Corporation’s entire holdings of a particular financial instrument, or the tax consequences of realizing gains or losses on the sale of financial instruments.  The following table sets forth the carrying amounts and estimated fair values of financial instruments that are not recorded at fair value in the Corporation’s financial statements at December 31, 2018 and 2017.      December 31, 2018 December 31, 2017  (in thousands) Level of Fair Value Hierarchy Carrying Amount Fair Value Carrying Amount Fair Value  Financial Assets:  Cash and cash equivalents Level 1 $ 47,358 $ 47,358 $ 69,672 $ 69,672  Held-to-maturity securities Level 2 2,445 2,493 5,030 5,143  Held-to-maturity securities Level 3 3,059 3,059 2,606 2,606  Loans Level 3 3,232,561 3,079,946 2,916,568 2,855,812  Restricted stock Level 1 40,686 40,686 37,314 37,314   Financial Liabilities:  Checking deposits Level 1 935,574 935,574 896,129 896,129  Savings, NOW and money market deposits Level 1 1,590,341 1,590,341 1,602,460 1,602,460  Time deposits Level 2 559,057 553,900 323,408 323,108  Short-term borrowings Level 1 388,923 388,923 281,141 281,141  Long-term debt Level 2 362,027 354,651 423,797 418,465  As described in “Note A – Summary of Significant Accounting Policies” t he Corporation adopted ASU 2016-01 on January 1, 2018 and applied the provisions of the standard prospectively to the fair value amounts in the table above.

Revenue From Contracts With Cus

Revenue From Contracts With Customers	12 Months Ended
	Dec. 31, 2018
Revenue From Contracts With Customers [Abstract]
Revenue From Contracts With Customers	NOTE N – REVENUE FROM CONTRACTS WITH CUSTOMERS  As described in “Note A – Summary of Significant Accounting Policies,” the Corporation adopted ASU 2014-09 “Revenue from Contracts with Customers” and all subsequent amendments on January 1, 2018. The majority of the Bank's income streams are outside of the scope of ASU 2014-09, such as interest and dividend income on loans and securities. Income streams that are within the scope of ASU 2014-09 are recorded in the noninterest income section of the consolidated statements of income and include the following types of fees earned from the Bank's contracts with customers.  Investment Management Division Revenues. The Bank holds customer assets in a fiduciary capacity and provides various services, including trust account services, estate settlement, custody and asset management. The services are performed for customers over time, requiring a time-based measure of progress. Fees are assessed based on market values of customer assets held or under management as of a certain point in time, and income cannot be estimated prior to the end of the measurement period. Volatility in equity and other market values will impact the amount of revenue that will be earned. Fees are generally earned and collected on a monthly or quarterly basis, accrued to income as earned and included in the consolidated statements of income in the line item "Investment Management Division income."  Deposit Account Revenues. Fees are earned and collected on a monthly basis for account maintenance and activity-based service charges on deposit accounts. The services are performed for customers over time, requiring a time-based measure of progress. Customers may be required to maintain minimum balances and average balances. Additional fees may also be earned for overdrafts, replacement of debit cards, bill payment, lockbox services and ACH services, among others, and are earned and collected as transactions take place. All deposit account fees are accrued to income as earned, either monthly or at the point of sale, and included in the consolidated statements of income in the line item "Service charges on deposit accounts."  Transaction and Branch Service Fees. The following revenue streams are components of “Other noninterest income” on the consolidated statements of income. These components totaled $2,089,000 and $1,912,000 for the years ended December 31, 2018 and 2017, respectively. Other items included in “Other noninterest income,” such as BOLI income, non-service components of net pension cost, real estate tax refunds and gains on sales of fixed assets are outside of the scope of ASU 2014-09.  Debit/Credit Card Revenues . The Bank earns a fee when its customers use their debit or credit cards in point-of-sale transactions. These fees are generally known as interchange fees. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recorded daily, concurrently with the transaction processing services provided to the cardholder.  Branch Services Revenues. The Bank charges fees for safe deposit box rentals, wire transfers, money orders, checkbook printing, official checks and ATM usage. Fees are earned, collected and generally recorded as revenue when the service is provided.  Investment Advisory Services. The Bank provides branch space to a third party who sells financial products to the Bank’s customers and pays commissions to the Bank based on the products sold. Commissions are variable and based on the market values of financial assets sold. Commissions are accrued to income as earned and collected.

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2018
Derivatives [Abstract]
Derivatives	NOTE O – DERIVATIVES  As part of its asset liability management activities, the Corporation utilizes interest rate swaps to help manage its interest rate risk position. The notional amount of an interest rate swap does not represent the amount exchanged by the parties. The exchange of cash flows is determined by reference to the notional amount and the other terms of the interest rate swap agreements.  The Bank entered into an interest rate swap with a notional amount totaling $150 million on May 22, 2018, which was designated as a cash flow hedge of certain FHLB advances included in short-term borrowings on the consolidated balance sheet. The swap was determined to be fully effective during the period presented and therefore no amount of ineffectiveness has been included in net income. The aggregate fair value of the swap is recorded in other liabilities, with changes in fair value net of related income taxes recorded in other comprehensive income (loss). The amount included in accumulated other comprehensive income (loss) would be reclassified to current earnings should the hedge no longer be considered effective. The Corporation expects the hedge to remain fully effective during the remaining term of the swap.  The following table summarizes information about the interest rate swap designated as a cash flow hedge at December 31, 2018.      Notional amount $150 million  Weighted average fixed pay rate 2.90%  Weighted average 3-month LIBOR receive rate Currently 2.38%  Weighted average maturity 2.43 Years   Interest expense recorded on the swap transaction, which totaled $477,000 for 2018, is included in the line item “Interest expense – short-term borrowings” in the consolidated statements of income. Amounts reported in accumulated other comprehensive income (loss) related to the swap will be reclassified to interest expense as interest payments are received/made on the Bank’s variable-rate assets/liabilities. During 2018, the Corporation had $477,000 of reclassifications to interest expense. During the next twelve months, the Corporation estimates that $322,000 will be reclassified as an increase to interest expense.  The following table presents the net gains (losses) recorded in the consolidated statements of income and the consolidated statements of comprehensive income relating to the interest rate swap for the year ended 2018.     Amount of Amount of Loss  Gain/(Loss) Amount of Loss Recognized in Other  Recognized in OCI Reclassified from OCI Noninterest Income  (in thousands) (Effective Portion) to Interest Expense (Ineffective Portion)  Interest rate contract:  Year ended December 31, 2018 $ (1,607) $ 477 $ —   The following table reflects the amounts relating to the interest rate swap included in the consolidated balance sheet at December 31, 2018.     Notional Fair Value  (in thousands) Amount Asset Liability  Included in other assets or other liabilities $ — $ 1,130  Interest rate swap related to FHLB advances $ 150,000   Credit Risk Related Contingent Features. The Bank’s agreement with its interest rate swap counterparty sets forth minimum collateral posting thresholds. If the termination value of the swap is a net asset position, the counterparty may be required to post collateral against its obligations to the Bank under the agreement. However, if the termination value of the swap is a net liability position, the Bank may be required to post collateral to the counterparty. At December 31, 2018, the Bank posted collateral of $1.7 million to its counterparty under the agreement which is in a net liability position. If the Bank had breached any of these provisions at December 31, 2018, it could have been required to settle its obligations under the agreement at the termination value.

Parent Company Financial Inform

Parent Company Financial Information	12 Months Ended
	Dec. 31, 2018
Parent Company Financial Information [Abstract]
Parent Company Financial Information	NOTE P – PARENT COMPANY FINANCIAL INFORMATION  Condensed financial information for the Corporation (parent company only) is as follows:  CONDENSED BALANCE SHEETS     December 31,  (in thousands) 2018 2017  Assets:  Cash and due from banks $ 583 $ 925  Investment in subsidiary bank, at equity 390,388 354,334  Prepaid income taxes — 1,552  Deferred income tax benefits 1,924 1,381  Other assets 80 81  $ 392,975 $ 358,273  Liabilities:  Other liabilities $ 332 $ 25  Cash dividends payable 4,456 3,798  4,788 3,823  Stockholders' equity:  Common stock 2,542 2,467  Surplus 145,163 127,122  Retained earnings 249,922 224,315  397,627 353,904  Accumulated other comprehensive income (loss), net of tax (9,440) 546  388,187 354,450  $ 392,975 $ 358,273  CONDENSED STATEMENTS OF INCOME     Year ended December 31,  (in thousands) 2018 2017 2016  Income:  Dividends from subsidiary bank $ 15,525 $ 11,150 $ 4,500   Expenses:  Salaries 1,814 2,434 1,517  Other operating expenses 343 406 376  2,157 2,840 1,893   Income before income taxes 13,368 8,310 2,607  Income tax benefit (1,442) (1,235) (1,181)  Income before undistributed earnings of subsidiary bank 14,810 9,545 3,788  Equity in undistributed earnings 26,763 25,577 27,092  Net income $ 41,573 $ 35,122 $ 30,880   Comprehensive income $ 31,864 $ 37,272 $ 21,752  CONDENSED STATEMENTS OF CASH FLOWS      Year ended December 31,  (in thousands) 2018 2017 2016  Cash Flows From Operating Activities:  Net income $ 41,573 $ 35,122 $ 30,880  Adjustments to reconcile net income to net cash provided by operating activities:  Undistributed earnings of subsidiary bank (26,763) (25,577) (27,092)  Deferred income tax provision (credit) (543) 167 (84)  Stock-based compensation expense 1,814 2,434 1,517  Increase (decrease) in other liabilities 307 5 (19)  Other decreases (increases) 1,619 (1,383) 532  Net cash provided by operating activities 18,007 10,768 5,734   Cash Flows From Investing Activities:  Capital contributions to Bank subsidiary (19,000) (20,500) (38,883)   Cash Flows From Financing Activities:  Repurchase of common stock (1,541) — —  Shares withheld upon the vesting and conversion of RSUs (774) (527) (370)  Proceeds from exercise of stock options 312 917 906  Proceeds from issuance of common stock, net 18,239 22,598 43,712  Cash dividends paid (15,585) (13,703) (12,078)  Net cash provided by financing activities 651 9,285 32,170  Net decrease in cash and cash equivalents* (342) (447) (979)  Cash and cash equivalents, beginning of year 925 1,372 2,351  Cash and cash equivalents, end of year $ 583 $ 925 $ 1,372   Supplemental Schedule of Noncash Financing Activities:  Cash dividends payable $ 4,456 $ 3,798 $ 3,368  * Cash and cash equivalents is defined as cash and due from banks and includes, among other things, the checking and money market accounts with the Corporation’s wholly-owned bank subsidiary.

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Data [Abstract]
Quarterly Financial Data	NOTE Q – QUARTERLY FINANCIAL DATA (Unaudited)      (in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Total  2018  Interest income $ 32,304 $ 34,946 $ 34,859 $ 36,128 $ 138,237  Interest expense 7,148 9,061 9,568 9,953 35,730  Net interest income 25,156 25,885 25,291 26,175 102,507  Provision (credit) for loan losses 1,512 803 (1,768) (2,302) (1,755)  Noninterest income before  net securities losses 3,292 2,679 2,735 3,979 12,685  Net losses on sales of securities — — (4,960) (5,446) (10,406)  Noninterest expense 14,868 15,707 14,242 15,089 59,906  Income before income taxes 12,068 12,054 10,592 11,921 46,635  Income tax expense 957 1,739 535 1,831 5,062  Net income 11,111 10,315 10,057 10,090 41,573 Earnings per share:  Basic .44 .41 .39 .40 1.64  Diluted .44 .40 .39 .39 1.63  Comprehensive income 2,925 7,869 8,952 12,118 31,864   2017  Interest income $ 28,498 $ 28,970 $ 30,337 $ 30,460 $ 118,265  Interest expense 4,838 5,177 5,634 6,060 21,709  Net interest income 23,660 23,793 24,703 24,400 96,556  Provision for loan losses 788 1,293 1,122 1,651 4,854  Noninterest income before  net securities gains (losses) 2,396 2,681 2,484 2,466 10,027  Net gains (losses) on sales of securities 57 1 16 (1,940) (1,866)  Noninterest expense 13,347 13,468 13,394 14,643 54,852  Income before income taxes 11,978 11,714 12,687 8,632 45,011  Income tax expense 2,897 2,581 3,345 1,066 9,889  Net income 9,081 9,133 9,342 7,566 35,122 Earnings per share:  Basic .38 .38 .38 .31 1.44  Diluted .38 .37 .38 .30 1.43  Comprehensive income 9,705 11,619 9,009 6,939 37,272

Summary Of Significant Accoun_2

Summary Of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Summary Of Significant Accounting Policies [Abstract]
Basis Of Presentation	The consolidated financial statements include the accounts of The First of Long Island Corporation and its wholly-owned subsidiary, The First National Bank of Long Island, and subsidiaries wholly-owned by the Bank, either directly or indirectly: The First of Long Island Agency, Inc.; FNY Service Corp. (“FNY”); and The First of Long Island REIT, Inc. (“REIT”). The Corporation’s financial condition and operating results principally reflect those of the Bank and its subsidiaries. The consolidated entity is referred to as the “Corporation,” and the Bank and its subsidiaries are collectively referred to as the “Bank.” All intercompany balances and amounts have been eliminated. In preparing the consolidated financial statements, management is required to make estimates, such as the allowance for loan losses, and assumptions that affect the reported asset and liability balances, revenue and expense amounts and the disclosure of contingent assets and liabilities. Actual results could differ significantly from those estimates.  The accounting and reporting policies of the Corporation reflect banking industry practice and conform to generally accepted accounting principles (“GAAP”) in the United States. The following is a summary of the Corporation’s significant accounting policies.
Cash And Cash Equivalents	Cash and Cash Equivalents  Cash and cash equivalents include cash and deposits with other financial institutions that generally mature within 90 days.
Investment Securities	Investment Securities  Current accounting standards require that investment securities be classified as held-to-maturity, available-for-sale or trading. The trading category is not applicable to any securities in the Bank's portfolio because the Bank does not buy or hold debt or equity securities principally for the purpose of selling in the near term. Held-to-maturity securities, or debt securities which the Bank has the intent and ability to hold to maturity, are reported at amortized cost. Available-for-sale securities, or debt securities which are neither held-to-maturity securities nor trading securities, are reported at fair value, with unrealized gains and losses, net of the related income tax effect, included in other comprehensive income (loss). Equity securities, if any, are carried at fair value, with changes in fair value reported in net income. Equity securities without readily determinable fair values are carried at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment.  Interest income includes amortization or accretion of purchase premium or discount. Premiums and discounts on securities are amortized or accreted using the level-yield method. Prepayments are anticipated for mortgage-backed securities. Premiums on municipal securities are amortized to the earlier of the stated maturity date or the first call date, while discounts on municipal securities are accreted to the stated maturity date. Realized gains and losses on the sale of securities are determined using the specific identification method.  Investment securities are evaluated for other-than-temporary impairment (“OTTI”) no less often than quarterly. In determining OTTI, management considers many factors, including: (1) the length of time and the extent to which the fair value has been less than cost; (2) the financial condition and near-term prospects of the issuer; (3) whether the market decline was affected by macroeconomic conditions; and (4) whether management has the intent to sell the debt security or more likely than not will be required to sell the debt security before its anticipated recovery. The assessment of whether an other-than-temporary decline exists involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time.  When OTTI occurs, management considers whether it intends to sell, or, more likely than not, will be required to sell a security in an unrealized loss position before recovery of its amortized cost basis. If either of these criteria is met, the entire difference between amortized cost and fair value is recognized in earnings. For securities that do not meet the aforementioned criteria, the amount of impairment recognized in earnings is limited to the amount related to credit losses, while impairment related to other factors is recognized in other comprehensive income (loss).
Loans Held-For-Sale	Loans Held-for-Sale  Loans held-for-sale are carried at the lower of cost or fair value. Any subsequent declines in fair value below the initial carrying value are recorded as a valuation allowance established through a charge to noninterest income.
Loans And Allowance For Loan Losses	Loans and Allowance for Loan Losses  Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at their outstanding principal balance less any chargeoffs and the allowance for loan losses and plus or minus net deferred loan costs and fees, respectively. Interest on loans is credited to income based on the principal amount outstanding. Direct loan origination costs, net of loan origination fees, are deferred and recognized in interest income using the level-yield method without anticipating prepayments.  The past due status of a loan is based on the contractual terms in the loan agreement. Unless a loan is well secured and in the process of collection, the accrual of interest income is discontinued when a loan becomes 90 days past due as to principal or interest payments. The accrual of interest income on a loan is also discontinued when it is determined that the borrower will not be able to make principal and interest payments according to the contractual terms of the current loan agreement. When the accrual of interest income is discontinued on a loan, any accrued but unpaid interest is reversed against current period income. Interest received on nonaccrual loans is applied to the outstanding principal balance until the loans qualify for return to an accrual status, if ever. Return to an accrual status occurs when all the principal and interest amounts contractually past due are brought current and all future payments are reasonably assured.  The allowance for loan losses is established through provisions for loan losses charged against income. When available information confirms that specific loans, or portions thereof, are uncollectible, these amounts are charged against the allowance for loan losses, and subsequent recoveries, if any, are credited to the allowance.  The allowance for loan losses is an amount that management currently believes will be adequate to absorb probable incurred losses in the Bank’s loan portfolio. The process for estimating credit losses and determining the allowance for loan losses as of any balance sheet date is subjective in nature and requires material estimates. Actual results could differ significantly from those estimates.  The allowance for loan losses is comprised of specific reserves allocated to individually impaired loans plus estimated losses on pools of loans that are collectively reviewed. Although the allowance for loan losses has two separate components, one for impairment losses on individual loans and one for collective impairment losses on pools of loans, the entire allowance for loan losses is available to absorb realized losses as they occur whether they relate to individual loans or pools of loans.  Estimated losses for loans individually deemed to be impaired are based on either the fair value of collateral or the discounted value of expected future cash flows. For all collateral dependent impaired loans, impairment losses are measured based on the fair value of the collateral. A loan is considered to be impaired when, based on current information and events, it is probable that the Bank will be unable to collect the scheduled principal and interest when due according to the contractual terms of the current loan agreement. Loans that experience insignificant payment delays and payment shortfalls are not automatically considered to be impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record and financial condition and the amount of the shortfall in relation to the principal and interest owed. In estimating the fair value of real estate collateral, management utilizes appraisals or evaluations adjusted for costs to dispose and a distressed sale adjustment, if needed.  In addition to estimating losses for loans individually deemed to be impaired, management also estimates collective impairment losses for pools of loans that are not specifically reviewed. Loan pools include: commercial and industrial loans; small business credit scored loans; owner-occupied commercial mortgages; multifamily commercial mortgages; other commercial mortgages; construction and land development loans; first-lien residential mortgages; junior-lien residential mortgages; first-lien home equity lines; junior-lien home equity lines; and consumer loans. The Bank’s highest average annualized loss experience over periods of 24, 36, 48 or 60 months is generally the starting point in determining the allowance for loan losses for each pool of loans. Management believes that this approach appropriately reflects losses from the current economic cycle and those incurred losses in the Bank’s loan portfolio. However, since future losses could vary significantly from those experienced in the past, on a quarterly basis management adjusts its historical loss experience to reflect current conditions. In doing so, management considers a variety of general qualitative factors and then subjectively determines the weight to assign to each in estimating losses. The factors include, among others: (1) delinquencies, (2) economic conditions as judged by things such as national and local unemployment levels, (3) changes in value of underlying collateral as judged by things such as median home prices, commercial vacancy rates and forecasted vacancy and rental rates in the Bank’s service area, (4) trends in the nature and volume of loans, (5) concentrations of credit, (6) changes in lending policies and procedures, (7) experience, ability and depth of lending staff, (8) changes in the quality of the loan review function, (9) environmental risks, and (10) loan risk ratings. Substantially all of the Bank’s allowance for loan losses allocable to pools of loans that are collectively evaluated for impairment results from these qualitative adjustments to historical loss experience. Because of the nature of the qualitative factors and the difficulty in assessing their impact, management’s resulting estimate of losses may not accurately reflect actual losses in the portfolio.  Troubled debt restructurings are by definition impaired loans and are generally reported at the present value of estimated future cash flows using the loan’s effective rate at inception. However, if a troubled debt restructuring is considered to be a collateral dependent loan, the loan is reported at the fair value of the collateral.
Transfers Of Financial Assets	Transfers of Financial Assets  Transfers of financial assets are accounted for as sales when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from the Corporation, 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 the Corporation does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Bank Premises And Equipment	Bank Premises and Equipment  Land is carried at cost. Other bank premises and equipment are carried at cost less accumulated depreciation and amortization. Buildings are depreciated using the straight-line method over their estimated useful lives, which range from 31 to 40 years. Building and leasehold improvements are depreciated using the straight-line method over the remaining lives of the buildings or leases, as applicable, or their estimated useful lives, whichever is shorter. The lives of the respective leases range from five to twenty years. Furniture, fixtures and equipment are depreciated using the straight-line method over their estimated useful lives, which range from three to ten years. Premises and equipment held-for-sale, if any, is included in Other Assets on the Corporation’s consolidated balance sheet and carried at the lower of cost or fair value.
Bank-Owned Life Insurance	Bank-owned Life Insurance  The Bank is the owner and beneficiary of insurance policies on the lives of certain officers. Bank-owned life insurance (“BOLI”) is recorded at the amount that can be realized under the contract at the balance sheet date, which is the cash surrender value adjusted for other charges or amounts due that are probable at settlement, if any.
Restricted Stock	Restricted Stock  The Bank is a member of and is required to own stock in the Federal Home Loan Bank of New York (“FHLB”) and the Federal Reserve Bank of New York (“FRB”). The amount of FHLB stock held is based on membership and the level of FHLB advances. The amount of FRB stock held is based on the Bank’s capital and surplus balances. These stocks do not have a readily determinable fair value, are carried at cost, classified as restricted stock and periodically evaluated for impairment based on the prospects for the ultimate recovery of cost. Cash dividends, if any, are reported as interest income on taxable investment securities. 
Other Real Estate Owned	Other Real Estate Owned  Real estate acquired through foreclosure or by deed-in-lieu of foreclosure is initially recorded at the lower of cost or fair value, less estimated selling costs and is included in other assets on the consolidated balance sheet. Chargeoffs recorded at the time of acquisition are charged to the allowance for loan losses. Thereafter, decreases in the property’s estimated fair value are charged to earnings and credited to a valuation allowance and subsequent recoveries in fair value are credited to earnings and charged to the valuation allowance. Such adjustments to earnings are included in other noninterest expense along with any additional property maintenance costs incurred in owning the property. Rental income received from tenants of other real estate owned is included in other noninterest income.
Long-term Assets	Long-term Assets  Premises and equipment, intangible assets, BOLI and other long-term assets, if any, are reviewed for impairment when events indicate that their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
Loan Commitments And Related Financial Instruments	Loan Commitments and Related Financial Instruments  Financial instruments include off-balance-sheet credit instruments, such as commitments to make loans, commercial letters of credit and standby letters of credit. The face amount of these items represents the exposure to loss, before considering collateral held or ability to repay. The Bank maintains a reserve for losses on off-balance-sheet credit exposures which is included in accrued expenses and other liabilities on the consolidated balance sheet. Off-balance-sheet credit instruments are recorded on the balance sheet when they are funded or drawn down. 
Derivatives	Derivatives  The Corporation records cash flow hedges at the inception of a derivative contract based on management’s intentions and belief as to the likely effectiveness of the hedge. Cash flow hedges represent a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability. For a cash flow hedge, the gain or loss on the derivative is recorded in other comprehensive income (loss) and is reclassified into earnings in the same period during which the hedged transaction affects earnings. The changes in the fair value of a derivative that is not highly effective in hedging the expected cash flows of the hedged item are recognized immediately as noninterest income in the consolidated income statements.  Net cash settlements on derivatives that qualify for hedge accounting are recorded in interest income or interest expense, based on the item being hedged. Net cash settlements on derivatives that do not qualify for hedge accounting are reported in noninterest income. Cash flows from hedges are classified in the consolidated statements of cash flows in the same manner as the items being hedged.  The Corporation formally documents the relationship between derivatives and hedged items, as well as the risk management objective and the strategy for undertaking hedge transactions at the inception of the hedging relationship. This documentation includes linking cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. The Corporation also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instruments that are used are highly effective in offsetting changes in cash flows of the hedged item. The Corporation discontinues hedge accounting when it determines that the derivative is no longer effective in offsetting changes in cash flows of the hedged item, the derivative is settled or terminated, a hedged forecasted transaction is no longer probable, a hedged firm commitment is no longer firm or treatment of the derivative as a hedge is no longer appropriate or intended.  When hedge accounting is discontinued, subsequent changes in fair value of the derivative are recorded as noninterest income. When a cash flow hedge is discontinued but the hedged cash flows or forecasted transactions are still expected to occur, gains or losses that were accumulated in other comprehensive income (loss) are amortized into earnings over the same periods which the hedged transactions will affect earnings. 
Checking Deposits	Checking Deposits  The Bank’s commercial checking accounts generally have a related noninterest-bearing sweep account. The sole purpose of the sweep accounts is to reduce the reserve balances that the Bank is required to maintain with the FRB, and thereby increase funds available for investment. Although the sweep accounts are classified as savings accounts for regulatory purposes, they are included in checking deposits in the accompanying consolidated balance sheets.
Income Taxes	Income Taxes  A current tax liability or asset is recognized for the estimated taxes payable or refundable on tax returns for the current year. A deferred tax liability or asset is recognized for the estimated future tax effects attributable to temporary differences and carryforwards. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefits that, based on available evidence, are not expected to be realized. The measurement of current and deferred tax liabilities and assets is based on provisions of the enacted tax law. The effects of future changes in tax laws or rates are not considered. The Corporation recognizes interest and/or penalties related to income tax matters in noninterest income or noninterest expense as appropriate.
Retirement Plans	Retirement Plans  Pension expense is the sum of service cost, interest cost, amortization of actuarial gains and losses and plan expenses, net of the expected return on plan assets and participant contributions. The service cost component of pension expense is included in salaries on the consolidated statement of income. All other components of pension expense are included in other noninterest income. Employee 401(k) plan expense is equal to the amount of the Corporation’s matching contributions and is included in employee benefits and other personnel expense on the consolidated statement of income.
Loss Contingencies	Loss Contingencies  Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated.
Stockholders’ Equity	Stockholders’ Equity  Earnings Per Share . The Corporation calculates basic and diluted earnings per share (“EPS”) using the two-class method. Under the two-class method, net income for the period is allocated between common stockholders and participating securities according to dividends declared and participation rights in undistributed earnings. Basic EPS excludes the dilutive effect of outstanding stock options and restricted stock units (“RSUs”) and is computed by dividing net income allocated to common stockholders by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if outstanding stock options and RSUs were converted into shares of common stock that then shared in the earnings of the Corporation. Diluted EPS is computed by dividing net income allocated to common stockholders by the weighted average number of common shares and dilutive stock options and RSUs. 6,122 RSUs were excluded from the calculation of EPS at December 31, 2018 because their inclusion would be anti-dilutive. There were no anti-dilutive stock options or RSUs at December 31, 2017 or 2016. Other than the stock options and RSUs described in “Note I – Stock-Based Compensation”, the Corporation has no securities that could be converted into common stock nor does the Corporation have any contracts that could result in the issuance of common stock.  The following table is a calculation of basic and diluted EPS for the periods indicated.      (dollars in thousands, except per share data) 2018 2017 2016  Net income $ 41,573 $ 35,122 $ 30,880  Income allocated to participating securities (1) 115 128 127  Income allocated to common stockholders $ 41,458 $ 34,994 $ 30,753   Weighted average:  Common shares 25,293,698 24,219,813 22,745,967  Dilutive stock options and restricted stock units (1) 164,301 255,333 271,929  25,457,999 24,475,146 23,017,896  Earnings per share:  Basic $1.64 $1.44 $1.35  Diluted $1.63 $1.43 $1.34  (1) RSUs awarded in 2016 accrue dividends at the same rate as the dividends declared by the Board of Directors on the Corporation’s common stock. For purposes of computing EPS, these RSUs are considered to participate with common stock in the earnings of the Corporation and, therefore, the Corporation calculates basic and diluted EPS using the two-class method. Under the two-class method, net income for the period is allocated between common stockholders and participating securities according to dividends declared and participation rights in undistributed earnings. Substantially all of the RSUs awarded in 2016 vested on December 31, 2018.  Stock Split. On October 27, 2016, the Corporation declared a 3 -for-2 stock split effected through a 50% stock dividend. Additional shares issued as a result of the stock split are shown for 2016 on the line captioned “3-for-2 stock split” in the Consolidated Statement of Changes in Stockholders’ Equity. Share and per share amounts included in the consolidated financial statements and notes thereto have been adjusted as appropriate to reflect the effect of the split.  Public Offering of Common Stock. In May 2016, the Corporation sold 1,300,000 shares of common stock ( 1,950,000 shares post-split) in an underwritten public offering at a price of $29.00 per share ( $19.33 post-split). The net proceeds of the offering, after the underwriting discount and offering expenses paid by the Corporation, were $35,270,000 . 
Stock-based Compensation	Stock-based Compensation  The Corporation’s stock-based compensation plans are described in “Note I – Stock-Based Compensation”. Compensation cost is determined for stock options and RSUs issued to employees and non-employee directors based on the grant date fair value of the award.  Compensation expense for RSUs is recognized over the applicable performance or service period, which is usually the vesting period, or the period from the grant date to the participant’s eligible retirement date, whichever is shorter. Compensation expense is adjusted at the end of the performance period, if applicable, to reflect the actual number of shares of the Corporation’s common stock into which the RSUs will be converted. Compensation expense for stock options is recognized ratably over the five -year vesting period or the period from the grant date to the participant’s eligible retirement date, whichever is shorter. The Corporation accounts for forfeitures as they occur.
Comprehensive Income	Comprehensive Income  Comprehensive income includes net income and other comprehensive income (loss). Other comprehensive income (loss) includes revenues, expenses, gains and losses that under GAAP are included in comprehensive income but excluded from net income. Other comprehensive income (loss) for the Corporation consists of net unrealized holding gains or losses on available-for-sale securities and derivative instruments and changes in the funded status of the Bank’s defined benefit pension plan, all net of related income taxes. Accumulated other comprehensive income (loss) is recognized as a separate component of stockholders’ equity.  The components of other comprehensive income (loss) and the related tax effects are as follows:      (in thousands) 2018 2017 2016  Change in net unrealized holding gains (losses) on available-for-sale securities:  Change arising during the period $ (18,891) $ (236) $ (15,153)  Reclassification adjustment for losses (gains) included in net income (1) 10,406 1,867 (1,851)  (8,485) 1,631 (17,004)  Tax effect (2,569) 685 (6,983)  (5,916) 946 (10,021)  Change in funded status of pension plan:  Unrecognized net gain (loss) arising during the period (4,316) 1,700 1,199  Amortization of net actuarial loss included in pension expense (2) — 18 244  (4,316) 1,718 1,443  Tax effect (1,312) 514 550  (3,004) 1,204 893  Change in unrealized loss on derivative instrument:  Amount of loss recognized during the period (1,607) — —  Reclassification adjustment for net interest expense included in  net income (3) 477 — —  (1,130) — —  Tax effect (341) — —  (789) — —  Other comprehensive income (loss) $ (9,709) $ 2,150 $ (9,128)  (1) Represents net realized gains and losses arising from the sale of available-for-sale securities. These net realized gains and losses are included in the consolidated statements of income in the line item, “Net gains (losses) on sales of securities.” See “Note B – Investment Securities” for the income tax expense or benefit related to these net realized gains and losses, which is included in the consolidated statements of income in the line item “Income tax expense.”  (2) Represents the amortization of net actuarial loss relating to the Corporation’s defined benefit pension plan. This item is a component of net periodic pension cost (see “Note J – Retirement Plans”) and included in the consolidated statements of income in the line item, “Other noninterest income.”  (3) Represents the net interest expense recorded on a derivative transaction and included in the consolidated statements of income in the line item “Interest expense – short-term borrowings.”  The following sets forth the components of accumulated other comprehensive income (loss), net of tax:      Current Period Change due to  Other Adoption  Balance Comprehensive of ASU Balance  (in thousands) 12/31/17 Income (Loss) 2018-02 (1) 12/31/18  Unrealized holding gains (losses) on available-for-sale securities $ 2,600 $ (5,916) $ 361 $ (2,955)  Unrealized actuarial losses on pension plan (2,054) (3,004) (638) (5,696)  Unrealized loss on derivative instrument — (789) — (789)  Accumulated other comprehensive income (loss), net of tax $ 546 $ (9,709) $ (277) $ (9,440)  (1) The adoption of Accounting Standards Update (“ASU”) 2018-02 “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” in the first quarter of 2018 allowed the Corporation to reclassify certain stranded tax effects arising from the enactment of the Tax Cuts and Jobs Act (“Tax Act”) in December 2017 from accumulated other comprehensive income to retained earnings. See “Adoption of New Accounting Standards” for more information regarding the effects of adopting ASU 2018-02. 
Operating Segments	Operating Segments  While management monitors the revenue streams of the Bank’s various products and services, the identifiable segments are not material and operations are managed and financial performance is evaluated on a company-wide basis. Accordingly, all of the financial operations of the Bank are aggregated in one reportable operating segment.
Investment Management Division	Investment Management Division  Assets held in a fiduciary capacity are not assets of the Corporation and, accordingly, are not included in the accompanying consolidated financial statements. The Investment Management Division records fees on the accrual basis.
Reclassifications	Reclassifications  When appropriate, items in the prior year financial statements are reclassified to conform to the current period presentation.
Adoption of New Accounting Standards	Adoption of New Accounting Standards  In May 2014, the Financial Accounting Standards Board (“FASB”) issued ASU 2014-09 “Revenue from Contracts with Customers.” While the guidance in ASU 2014-09 supersedes most existing industry-specific revenue recognition accounting guidance, much of a bank’s revenue comes from financial instruments such as debt securities and loans that are scoped-out of the guidance. The amendments in ASU 2014-09 also include improved disclosures to enable users of financial statements to better understand the nature, amount, timing and uncertainty of revenue that is recognized. The adoption of ASU 2014-09 and all subsequent amendments on January 1, 2018, using the modified retrospective transition method, did not materially impact the Corporation’s financial position or results of operations and, as such, no cumulative effect adjustment was recorded. See “Note N – Revenue from Contracts with Customers” for disclosures pertaining to the revenue streams within the scope of ASU 2014-09.  In January 2016, the FASB issued ASU 2016-01 “Financial Instruments – Overall.” The adoption of ASU 2016-01 on January 1, 2018 did not have a material impact on the Corporation’s financial position or results of operations but resulted in the prospective application of an exit price notion in the determination of the fair value of certain financial instruments as disclosed in “Note M – Fair Value of Financial Instruments.” Adoption of the ASU also resulted in the elimination of disclosures regarding the methods and assumptions used to estimate fair value. The Bank’s FHLB and FRB stock, included under the line item “Restricted stock, at cost” in the consolidated balance sheets, are specifically excluded from the scope of the ASU.  In August 2016, the FASB issued ASU 2016-15 “Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing diversity in practice. The adoption of ASU 2016-15 on January 1, 2018 did not have a material impact on the Corporation’s cash flows or disclosures.  In March 2017, the FASB issued ASU 2017-07 “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” The ASU requires, among other things, that an employer disaggregate the service cost component from other components of net benefit cost and provides explicit guidance on how to present the service cost component and other components of net benefit cost in the income statement. The adoption of ASU 2017-07 on January 1, 2018 resulted in revised income statement classifications of the components of net periodic pension cost for all periods presented. T he Corporation used the amounts disclosed in “Note J – Retirement Plans” as the basis for applying the retrospective presentation requirements of the ASU. See Note J for details of the reclassified amounts. The other amendments in the ASU did not materially impact the Corporation’s financial position or results of operations.  In February 2018, the FASB issued ASU 2018-02 “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.” The ASU allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Act which was signed into law on December 22, 2017. Management early-adopted the ASU in the first quarter of 2018 and reclassified $277,000 of stranded tax effect credits from accumulated other comprehensive income to retained earnings on January 1, 2018. The reclassification did not materially impact the Corporation’s financial position or results of operations. 
Impact Of Issued But Not Yet Effective Accounting Standards	Impact of Issued But Not Yet Effective Accounting Standards  The pronouncements discussed in this section are not intended to be an all-inclusive list, but rather only those pronouncements that could potentially have an impact on the Corporation’s financial position, results of operations or disclosures.  In February 2016, the FASB issued ASU 2016-02 “Leases.” ASU 2016-02 affects any entity that enters into a lease and is intended to increase the transparency and comparability of financial statements among organizations. The ASU requires, among other changes, a lessee to recognize on its balance sheet a lease asset and a lease liability for those leases previously classified as operating leases. The lease asset would represent the right to use the underlying asset for the lease term and the lease liability would represent the discounted value of the required lease payments to the lessor. The ASU would also require entities to disclose key information about leasing arrangements. ASU 2016-02, as amended, is effective for interim and annual reporting periods beginning after December 15, 2018. The Corporation utilized the transition method described in ASU 2018-11 “Leases – Targeted Improvements” to implement ASU 2016-02 on January 1, 2019. Upon adoption of the ASU, the Corporation recorded a right-of-use asset and lease liability approximating $15 million. Implementation did not significantly impact the Corporation’s results of operations or regulatory capital ratios, but will require additional disclosures in 2019.  In June 2016, the FASB issued ASU 2016-13 “Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 affects entities holding financial assets that are not accounted for at fair value, including loans, debt securities and other financial assets. The ASU requires financial assets measured at amortized cost to be presented at the net amount expected to be collected by recording an allowance for credit losses. ASU 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted beginning after December 15, 2018, including interim periods within those fiscal years. Management has established an internal committee to manage the implementation of the ASU. The committee is led by the Bank’s Chief Accounting Officer and includes the Chief Financial Officer and Chief Risk Officer. A broader group of Bank staff has been identified to assist, as needed, in implementing the ASU including representatives of the Bank’s loan operations, credit administration, lending, investments and technology functions. The committee has selected and engaged a third-party software provider, developed an implementation timeline, accumulated the historical data needed to implement the ASU and is reviewing the accounting policy decisions, documentation and internal control processes needed to fully implement the ASU. Implementation of ASU 2016-13 is expected to increase the Bank’s allowance for loan losses and add a component to the allowance for certain financial instruments other than loans.  In August 2018, the FASB issued ASU 2018-13 “Changes to the Disclosure Requirements for Fair Value Measurement” and ASU 2018-14 “Changes to the Disclosure Requirements for Defined Benefit Plans.” These ASUs modify certain disclosure requirements pertaining to fair value measurements and defined benefit plans, respectively, as part of the FASB’s disclosure framework project intended to improve the effectiveness of disclosures in the notes to financial statements. ASU 2018-13 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2019. ASU 2018-14 is effective for fiscal years ending after December 15, 2020. Early adoption is permitted. The adoption of these ASUs will modify the Corporation’s disclosures but will not impact its financial position or results of operations.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Summary Of Significant Accounting Policies [Abstract]
Calculation Of Earnings Per Share	   (dollars in thousands, except per share data) 2018 2017 2016  Net income $ 41,573 $ 35,122 $ 30,880  Income allocated to participating securities (1) 115 128 127  Income allocated to common stockholders $ 41,458 $ 34,994 $ 30,753   Weighted average:  Common shares 25,293,698 24,219,813 22,745,967  Dilutive stock options and restricted stock units (1) 164,301 255,333 271,929  25,457,999 24,475,146 23,017,896  Earnings per share:  Basic $1.64 $1.44 $1.35  Diluted $1.63 $1.43 $1.34  (1) RSUs awarded in 2016 accrue dividends at the same rate as the dividends declared by the Board of Directors on the Corporation’s common stock. For purposes of computing EPS, these RSUs are considered to participate with common stock in the earnings of the Corporation and, therefore, the Corporation calculates basic and diluted EPS using the two-class method. Under the two-class method, net income for the period is allocated between common stockholders and participating securities according to dividends declared and participation rights in undistributed earnings. Substantially all of the RSUs awarded in 2016 vested on December 31, 2018.
Components Of Other Comprehensive Income And Related Tax Effects	   (in thousands) 2018 2017 2016  Change in net unrealized holding gains (losses) on available-for-sale securities:  Change arising during the period $ (18,891) $ (236) $ (15,153)  Reclassification adjustment for losses (gains) included in net income (1) 10,406 1,867 (1,851)  (8,485) 1,631 (17,004)  Tax effect (2,569) 685 (6,983)  (5,916) 946 (10,021)  Change in funded status of pension plan:  Unrecognized net gain (loss) arising during the period (4,316) 1,700 1,199  Amortization of net actuarial loss included in pension expense (2) — 18 244  (4,316) 1,718 1,443  Tax effect (1,312) 514 550  (3,004) 1,204 893  Change in unrealized loss on derivative instrument:  Amount of loss recognized during the period (1,607) — —  Reclassification adjustment for net interest expense included in  net income (3) 477 — —  (1,130) — —  Tax effect (341) — —  (789) — —  Other comprehensive income (loss) $ (9,709) $ 2,150 $ (9,128)  (1) Represents net realized gains and losses arising from the sale of available-for-sale securities. These net realized gains and losses are included in the consolidated statements of income in the line item, “Net gains (losses) on sales of securities.” See “Note B – Investment Securities” for the income tax expense or benefit related to these net realized gains and losses, which is included in the consolidated statements of income in the line item “Income tax expense.”  (2) Represents the amortization of net actuarial loss relating to the Corporation’s defined benefit pension plan. This item is a component of net periodic pension cost (see “Note J – Retirement Plans”) and included in the consolidated statements of income in the line item, “Other noninterest income.”  (3) Represents the net interest expense recorded on a derivative transaction and included in the consolidated statements of income in the line item “Interest expense – short-term borrowings.”
Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax	     Current Period Change due to  Other Adoption  Balance Comprehensive of ASU Balance  (in thousands) 12/31/17 Income (Loss) 2018-02 (1) 12/31/18  Unrealized holding gains (losses) on available-for-sale securities $ 2,600 $ (5,916) $ 361 $ (2,955)  Unrealized actuarial losses on pension plan (2,054) (3,004) (638) (5,696)  Unrealized loss on derivative instrument — (789) — (789)  Accumulated other comprehensive income (loss), net of tax $ 546 $ (9,709) $ (277) $ (9,440)  (1) The adoption of Accounting Standards Update (“ASU”) 2018-02 “Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” in the first quarter of 2018 allowed the Corporation to reclassify certain stranded tax effects arising from the enactment of the Tax Cuts and Jobs Act (“Tax Act”) in December 2017 from accumulated other comprehensive income to retained earnings. See “Adoption of New Accounting Standards” for more information regarding the effects of adopting ASU 2018-02.

Investment Securities (Tables)

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investment Securities [Abstract]
Amortization Cost And Estimated Fair Value Of Investment Securities	   2018  (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value  Held-to-Maturity Securities:  State and municipals $ 5,142 $ 36 $ — $ 5,178  Pass-through mortgage securities 267 11 — 278  Collateralized mortgage obligations 95 1 — 96  $ 5,504 $ 48 $ — $ 5,552  Available-for-Sale Securities:  State and municipals $ 422,235 $ 3,220 $ (5,417) $ 420,038  Pass-through mortgage securities 66,631 24 (1,169) 65,486  Collateralized mortgage obligations 154,378 886 (363) 154,901  Corporate bonds 119,000 — (1,410) 117,590  $ 762,244 $ 4,130 $ (8,359) $ 758,015      2017  Held-to-Maturity Securities:  State and municipals $ 6,970 $ 78 $ — $ 7,048  Pass-through mortgage securities 311 21 — 332  Collateralized mortgage obligations 355 14 — 369  $ 7,636 $ 113 $ — $ 7,749  Available-for-Sale Securities:  State and municipals $ 453,158 $ 10,051 $ (1,886) $ 461,323  Pass-through mortgage securities 72,539 84 (1,232) 71,391  Collateralized mortgage obligations 190,175 15 (2,776) 187,414  $ 715,872 $ 10,150 $ (5,894) $ 720,128 
Securities With A Continuous Unrealized Losses Position	   2018  Less than 12 Months 12 Months or More Total  (in thousands) Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss  State and municipals $ 102,882 $ (1,639) $ 62,995 $ (3,778) $ 165,877 $ (5,417)  Pass-through mortgage securities 38,421 (142) 23,425 (1,027) 61,846 (1,169)  Collateralized mortgage obligations 32,577 (89) 7,342 (274) 39,919 (363)  Corporate bonds 97,590 (1,410) — — 97,590 (1,410)  Total temporarily impaired $ 271,470 $ (3,280) $ 93,762 $ (5,079) $ 365,232 $ (8,359)      2017  State and municipals $ 54,732 $ (574) $ 28,723 $ (1,312) $ 83,455 $ (1,886)  Pass-through mortgage securities 10,172 (81) 52,652 (1,151) 62,824 (1,232)  Collateralized mortgage obligations 130,267 (1,230) 54,751 (1,546) 185,018 (2,776)  Total temporarily impaired $ 195,171 $ (1,885) $ 136,126 $ (4,009) $ 331,297 $ (5,894) 
Sales Of Available-For-Sale Securities	   (in thousands) 2018 2017 2016   Proceeds $ 263,994 $ 135,695 $ 62,047   Gains $ 300 $ 382 $ 1,869  Losses (10,706) (2,249) (18)  Net gain (loss) $ (10,406) $ (1,867) $ 1,851 
Maturities	   (in thousands) Amortized Cost Fair Value  Held-to-Maturity Securities:  Within one year $ 3,059 $ 3,059  After 1 through 5 years 2,083 2,119  After 5 through 10 years — —  After 10 years — —  Mortgage-backed securities 362 374  $ 5,504 $ 5,552  Available-for-Sale Securities:  Within one year $ 47,839 $ 48,271  After 1 through 5 years 37,588 37,683  After 5 through 10 years 284,907 283,676  After 10 years 170,901 167,998  Mortgage-backed securities 221,009 220,387  $ 762,244 $ 758,015 

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2018
Loans [Abstract]
Loans Individually And Collectively Evaluated For Impairment	   December 31, 2018  Loans Allowance for Loan Losses  (in thousands) Individually Evaluated for Impairment Collectively Evaluated for Impairment Ending Balance Individually Evaluated for Impairment Collectively Evaluated for Impairment Ending Balance  Commercial and industrial $ 22 $ 98,763 $ 98,785 $ — $ 1,158 $ 1,158  Commercial mortgages:  Multifamily — 756,714 756,714 — 5,851 5,851  Other — 433,330 433,330 — 3,783 3,783  Owner-occupied 520 90,731 91,251 — 743 743  Residential mortgages:  Closed end 1,814 1,807,837 1,809,651 16 18,828 18,844  Revolving home equity 743 66,967 67,710 — 410 410  Consumer and other 324 5,634 5,958 — 49 49  $ 3,423 $ 3,259,976 $ 3,263,399 $ 16 $ 30,822 $ 30,838      December 31, 2017  Commercial and industrial $ 48 $ 109,575 $ 109,623 $ — $ 1,441 $ 1,441  Commercial mortgages:  Multifamily — 682,593 682,593 — 6,423 6,423  Other — 414,783 414,783 — 4,734 4,734  Owner-occupied 531 95,100 95,631 — 1,076 1,076  Residential mortgages:  Closed end 1,368 1,557,196 1,558,564 18 19,329 19,347  Revolving home equity — 83,625 83,625 — 689 689  Consumer and other — 5,533 5,533 — 74 74  $ 1,947 $ 2,948,405 $ 2,950,352 $ 18 $ 33,766 $ 33,784 
Allowance For Loan Losses	   (in thousands) Balance at 1/1/18 Chargeoffs Recoveries Provision for Loan Losses (Credit) Balance at 12/31/18  Commercial and industrial $ 1,441 $ 683 $ 34 $ 366 $ 1,158  Commercial mortgages:  Multifamily 6,423 — — (572) 5,851  Other 4,734 — — (951) 3,783  Owner-occupied 1,076 — — (333) 743  Residential mortgages:  Closed end 19,347 552 118 (69) 18,844  Revolving home equity 689 253 150 (176) 410  Consumer and other 74 9 4 (20) 49  $ 33,784 $ 1,497 $ 306 $ (1,755) $ 30,838      (in thousands) Balance at 1/1/17 Chargeoffs Recoveries Provision for Loan Losses (Credit) Balance at 12/31/17  Commercial and industrial $ 1,408 $ 102 $ 13 $ 122 $ 1,441  Commercial mortgages:  Multifamily 6,119 — — 304 6,423  Other 4,296 — — 438 4,734  Owner-occupied 959 820 — 937 1,076  Residential mortgages:  Closed end 15,740 97 3 3,701 19,347  Revolving home equity 1,401 100 — (612) 689  Consumer and other 134 27 3 (36) 74  $ 30,057 $ 1,146 $ 19 $ 4,854 $ 33,784      (in thousands) Balance at 1/1/16 Chargeoffs Recoveries Provision for Loan Losses (Credit) Balance at 12/31/16  Commercial and industrial $ 928 $ 445 $ 4 $ 921 $ 1,408  Commercial mortgages:  Multifamily 6,858 — — (739) 6,119  Other 3,674 — — 622 4,296  Owner-occupied 1,047 — — (88) 959  Residential mortgages:  Closed end 13,639 259 9 2,351 15,740  Revolving home equity 1,016 — 12 373 1,401  Consumer and other 94 5 5 40 134  $ 27,256 $ 709 $ 30 $ 3,480 $ 30,057 
Impaired Loans	   2018  (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized  With no related allowance recorded:  Commercial and industrial $ 22 $ 22 $ — $ 48 $ 3  Commercial mortgages - owner-occupied 520 604 — 530 25  Residential mortgages:  Closed end 1,561 1,573 — 1,566 5  Revolving home equity 743 747 — 754 —  Consumer and other 324 324 — 339 17  With an allowance recorded:  Residential mortgages - closed end 253 253 16 266 12  Total:  Commercial and industrial 22 22 — 48 3  Commercial mortgages - owner-occupied 520 604 — 530 25  Residential mortgages:  Closed end 1,814 1,826 16 1,832 17  Revolving home equity 743 747 — 754 —  Consumer and other 324 324 — 339 17  $ 3,423 $ 3,523 $ 16 $ 3,503 $ 62       2017  With no related allowance recorded:  Commercial and industrial $ 48 $ 48 $ — $ 67 $ 5  Commercial mortgages - owner-occupied 531 615 — 654 21  Residential mortgages - closed end 1,095 1,102 — 1,122 7  With an allowance recorded:  Residential mortgages - closed end 273 272 18 280 13  Total:  Commercial and industrial 48 48 — 67 5  Commercial mortgages - owner-occupied 531 615 — 654 21  Residential mortgages - closed end 1,368 1,374 18 1,402 20  $ 1,947 $ 2,037 $ 18 $ 2,123 $ 46      2016  With no related allowance recorded:  Commercial and industrial $ 131 $ 131 $ — $ 134 $ 1  Commercial mortgages - owner-occupied 558 636 — 575 —  Residential mortgages:  Closed end 230 313 — 245 —  Revolving home equity 280 279 — 280 —  With an allowance recorded:  Residential mortgages:  Closed end 626 634 45 641 29  Revolving home equity 1,490 1,491 482 1,493 —  Total:  Commercial and industrial 131 131 — 134 1  Commercial mortgages - owner-occupied 558 636 — 575 —  Residential mortgages:  Closed end 856 947 45 886 29  Revolving home equity 1,770 1,770 482 1,773 —  $ 3,315 $ 3,484 $ 527 $ 3,368 $ 30 
Aging Of The Recorded Investment In Loans	   December 31, 2018  (in thousands) 30-59 Days Past Due 60-89 Days Past Due Past Due 90 Days or More and Still Accruing Nonaccrual Loans Total Past Due Loans & Nonaccrual Loans Current Total Loans  Commercial and industrial $ — $ 43 $ — $ — $ 43 $ 98,742 $ 98,785  Commercial mortgages:  Multifamily — — — — — 756,714 756,714  Other — — — — — 433,330 433,330  Owner-occupied — — — — — 91,251 91,251  Residential mortgages:  Closed end 864 — — 1,392 2,256 1,807,395 1,809,651  Revolving home equity — — — 743 743 66,967 67,710  Consumer and other 2 — — — 2 5,956 5,958  $ 866 $ 43 $ — $ 2,135 $ 3,044 $ 3,260,355 $ 3,263,399      December 31, 2017  Commercial and industrial $ 20 $ — $ — $ — $ 20 $ 109,603 $ 109,623  Commercial mortgages:  Multifamily — — — — — 682,593 682,593  Other — — — — — 414,783 414,783  Owner-occupied — — — — — 95,631 95,631  Residential mortgages:  Closed end 2,186 21 — 1,000 3,207 1,555,357 1,558,564  Revolving home equity 522 — — — 522 83,103 83,625  Consumer and other 7 — — — 7 5,526 5,533  $ 2,735 $ 21 $ — $ 1,000 $ 3,756 $ 2,946,596 $ 2,950,352 
Loans Modified In Trouble Debt Restructurings	   Outstanding Recorded Investment Interest Rates  (dollars in thousands) Number of Loans Pre- Modification Post- Modification Pre- Modification Post- Modification  2018:  Residential mortgages - closed end 1 $ 432 $ 472 5.86% 4.50%  Consumer and other 1 350 350 6.50% 6.50%  2 $ 782 $ 822  2016:  Commercial and industrial 2 $ 1,131 $ 1,131 5.00% and 6.75% 5.00% and 6.75%  Residential mortgages - closed end 1 109 109 3.95% 3.95%  3 $ 1,240 $ 1,240 
Risk Ratings	The following tables present the recorded investment in commercial and industrial loans and commercial real estate loans by class of loans and risk rating. Loans shown as Pass are all loans other than those risk rated Watch, Special Mention, Substandard or Doubtful.      December 31, 2018  Internally Assigned Risk Rating  Special  (in thousands) Pass Watch Mention Substandard Doubtful Total  Commercial and industrial $ 97,684 $ — $ 667 $ 434 $ — $ 98,785  Commercial mortgages:  Multifamily 756,714 — — — — 756,714  Other 417,838 14,194 1,298 — — 433,330  Owner-occupied 85,710 1,090 3,911 540 — 91,251  $ 1,357,946 $ 15,284 $ 5,876 $ 974 $ — $ 1,380,080      December 31, 2017  Commercial and industrial $ 108,846 $ 450 $ 279 $ 48 $ — $ 109,623  Commercial mortgages:  Multifamily 673,128 2,354 7,111 — — 682,593  Other 404,379 7,567 2,837 — — 414,783  Owner-occupied 93,618 — 1,482 531 — 95,631  $ 1,279,971 $ 10,371 $ 11,709 $ 579 $ — $ 1,302,630  The following tables present the recorded investment in residential mortgage loans, home equity lines and other consumer loans by class of loans and risk rating. Loans shown as Pass are all loans other than those risk rated Watch, Special Mention, Substandard or Doubtful.      December 31, 2018  Internally Assigned Risk Rating  Special  (in thousands) Pass Watch Mention Substandard Doubtful Total  Residential mortgages:  Closed end $ 1,807,525 $ 312 $ — $ 1,814 $ — $ 1,809,651  Revolving home equity 66,718 — 249 743 — 67,710  Consumer and other 4,958 — — 324 — 5,282  $ 1,879,201 $ 312 $ 249 $ 2,881 $ — $ 1,882,643      December 31, 2017  Internally Assigned Risk Rating  (in thousands) Pass Watch Special Mention Substandard Doubtful Total  Residential mortgages:  Closed end $ 1,554,168 $ 2,200 $ 828 $ 1,368 $ — $ 1,558,564  Revolving home equity 82,665 256 704 — — 83,625  Consumer and other 5,236 — — — — 5,236  $ 1,642,069 $ 2,456 $ 1,532 $ 1,368 $ — $ 1,647,425 

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Premises And Equipment [Abstract]
Components Of Premises And Equipment	   December 31,  (in thousands) 2018 2017  Land $ 9,038 $ 9,038  Buildings and improvements 28,201 26,825  Leasehold improvements 14,175 12,652  Furniture and equipment 32,026 30,800  Construction in process 3,412 2,425  86,852 81,740  Accumulated depreciation and amortization (45,585) (42,092)  $ 41,267 $ 39,648 

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Schedule Of Remaining Maturities Of Banks Time Deposits	   Year (dollars in thousands) Less than $100,000 $100,000 or More Total  2019 $ 156,538 $ 126,721 $ 283,259  2020 18,285 48,379 66,664  2021 30,492 66,017 96,509  2022 10,489 17,981 28,470  2023 8,698 12,810 21,508  Thereafter 25,390 37,257 62,647  $ 249,892 $ 309,165 $ 559,057 

Borrowed Funds (Tables)

Borrowed Funds (Tables)	12 Months Ended
	Dec. 31, 2018
Borrowed Funds [Abstract]
Summary Of Borrowed Funds	   December 31,  (in thousands) 2018 2017  Short-term borrowings:  Securities sold under repurchase agreements $ 8,923 $ 11,141  Federal Home Loan Bank advances 380,000 270,000  388,923 281,141  Long-term debt:  Securities sold under repurchase agreements — 5,000  Federal Home Loan Bank advances 362,027 418,797  362,027 423,797  $ 750,950 $ 704,938 
Securities Sold Under Repurchase Agreements	   (dollars in thousands) 2018 2017  Average daily balance during the year $ 15,790 $ 15,903  Average interest rate during the year 1.31 % 1.77 %  Maximum month-end balance during the year $ 18,548 $ 19,188  Weighted average interest rate at year-end .05 % 1.72 % 
Federal Home Loan Advances	   (dollars in thousands) 2018 2017  Average daily balance during the year $ 607,797 $ 524,404  Average interest rate during the year 2.05 % 1.68 %  Maximum month-end balance during the year $ 742,027 $ 688,797  Weighted average interest rate at year-end 2.34 % 1.75 % 
Contractual Maturity And Weighted Average Interest Rates On FHLB Advances	   Contractual Maturity (dollars in thousands) Amount Weighted Average Rate  Overnight $ 230,000 2.60 %  2019 223,500 2.43  2020 82,750 1.84  2021 54,225 1.90  2022 75,872 2.05  2023 55,680 2.54  After 2023 20,000 2.01  512,027 2.22  $ 742,027 2.34 % 

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Taxes [Abstract]
Reconciliation Of Statutory Federal Income Tax Rate	   Year Ended December 31,  2018 2017 2016  Statutory federal income tax rate 21.0 % 35.0 % 35.0 %  State and local income taxes, net of federal income tax benefit (.8) 2.0 .9  Tax-exempt income, net of disallowed cost of funding (5.8) (10.2) (11.8)  BOLI income (1.2) (1.2) (.9)  Excess tax benefit of stock-based compensation (.9) (1.7) (.9)  Impact of cost segregation study (1.5) — —  Impact of federal tax reform on deferred taxes — (2.0) —  Other .1 .1 .4  10.9 % 22.0 % 22.7 % 
Provision For Income Taxes	   Year Ended December 31,  (in thousands) 2018 2017 2016  Current:  Federal $ 5,975 $ 8,139 $ 7,407  State and local 688 636 409  6,663 8,775 7,816  Deferred:  Federal (458) 335 1,114  State and local (1,143) 779 119  (1,601) 1,114 1,233  $ 5,062 $ 9,889 $ 9,049 
Net Deferred Tax Asset (Liability)	   December 31,  (in thousands) 2018 2017  Deferred tax assets:  Allowance for loan losses and off-balance-sheet credit exposure $ 9,312 $ 10,097  Stock-based compensation 1,384 1,382  Unrealized losses on available-for-sale securities 1,274 —  Accrued bonuses 686 —  Contract incentive 680 —  Net operating loss carryforwards 371 —  Unrealized loss on interest rate swap 341 —  Accrued rent expense 239 224  Asset writedown and other real estate owned valuation allowance 80 266  Directors' retirement expense 45 47  Supplemental executive retirement expense 36 17  Interest on nonperforming loans 16 55  Depreciation — 724  Accrued legal settlement — 12  14,464 12,824  Valuation allowance — —  14,464 12,824  Deferred tax liabilities:  Deferred loan costs 5,462 5,142  Prepaid pension 4,545 5,615  Depreciation 675 —  Deferred gain on Section 1031 exchange 276 —  Prepaid expenses 59 146  REIT spillover dividend — 3,043  Unrealized gains on available-for-sale securities — 1,259  11,017 15,205  Net deferred tax asset (liability) $ 3,447 $ (2,381) 

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Regulatory Matters [Abstract]
Schedule Of Capital Amounts And Ratios	   2018  Actual Capital Minimum Capital Adequacy Requirement Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions  (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio  Tier 1 capital to average assets:  Consolidated $ 397,036 9.40 % $ 169,015 4.00 % N/A N/A  Bank 399,237 9.45 168,916 4.00 $ 211,145 5.00 %  Common equity tier 1 capital to risk weighted assets:  Consolidated 397,036 15.29 116,840 4.50 N/A N/A  Bank 399,237 15.38 116,820 4.50 168,741 6.50  Tier 1 capital to risk weighted assets:  Consolidated 397,036 15.29 155,786 6.00 N/A N/A  Bank 399,237 15.38 155,761 6.00 207,681 8.00  Total capital to risk weighted assets:  Consolidated 428,020 16.48 207,715 8.00 N/A N/A  Bank 430,221 16.57 207,681 8.00 259,601 10.00   2017  Tier 1 capital to average assets:  Consolidated $ 353,684 9.34 % $ 151,398 4.00 % N/A N/A  Bank 353,568 9.34 151,358 4.00 $ 189,197 5.00 %  Common equity tier 1 capital to risk weighted assets:  Consolidated 353,684 15.28 104,128 4.50 N/A N/A  Bank 353,568 15.29 104,051 4.50 150,296 6.50  Tier 1 capital to risk weighted assets:  Consolidated 353,684 15.28 138,837 6.00 N/A N/A  Bank 353,568 15.29 138,735 6.00 184,980 8.00  Total capital to risk weighted assets:  Consolidated 382,670 16.54 185,116 8.00 N/A N/A  Bank 382,533 16.54 184,980 8.00 231,225 10.00 

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Stock-based Compensation [Abstract]
Summary Of RSU Vested And Expected To Vest	   Granted During the Year Ended December 31,  Total 2018 2017 2016  Number of RSUs :  Granted 272,291 70,688 94,329 107,274  Outstanding at December 31, 2018 215,084 65,390 76,033 73,661   Vested and convertible at December 31, 2018 80,348 14,233 — 66,115  Scheduled to vest during:  2019 91,581 21,178 62,857 7,546  2020 18,708 8,782 9,926 —  2021 24,447 21,197 3,250 —  215,084 65,390 76,033 73,661 
Schedule Of Share-based Payment Award Equity Instruments Other Than Options Valuation Assumptions	   2018  Performance-Based Service-Based  Vesting Vesting  Grant date fair value $27.09 $27.09 to $27.33  Market price on grant date $28.25 $28.25 to $28.50  Expected annual dividend $.60 $.60  Expected term (in years) 2.0 2.0 to 3.0  Risk-free interest rate 2.02% 1.89% to 2.02%   2017  Grant date fair value $26.27 $25.35 to $26.00  Market price on grant date $27.90 $27.50 to $28.15  Expected annual dividend $.56 $.56  Expected term (in years) 3.0 3.0 to 4.0  Risk-free interest rate 1.49% 1.60% to 1.67%   2016  Grant date fair value $18.17 $18.17 to $22.17  Market price on grant date $18.17 $18.17 to $22.17 
RSU Activity	   Weighted-  Weighted- Average Aggregate  Average Remaining Intrinsic  Number of Grant-Date Contractual Value  RSUs Fair Value Term (yrs.) (in thousands)  Outstanding at January 1, 2018 274,134 $ 19.64  Granted 70,688 27.10  Converted (107,722) 15.58  Forfeited (22,016) 22.86  Outstanding at December 31, 2018 215,084 $ 23.79 0.68 $ 4,291  Vested and Convertible at December 31, 2018 80,348 $ 19.76 — $ 1,603 
Stock Option Activity	   Weighted-  Weighted- Average Aggregate  Average Remaining Intrinsic  Number of Exercise Contractual Value  Options Price Term (yrs.) (in thousands)  Outstanding at January 1, 2018 159,807 $ 11.35  Exercised (63,695) 10.66  Outstanding at December 31, 2018 96,112 $ 11.80 1.40 $ 783  Exercisable at December 31, 2018 95,812 $ 11.79 1.38 $ 782  

Retirement Plans (Tables)

Retirement Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Retirement Plans [Abstract]
Projected Benefit Obligation	   2018 2017 2016  Weighted average assumptions used to determine the  benefit obligation at year end:  Discount rate 4.53% 3.93% 4.40%  Rate of increase in compensation levels 3.50% 3.50% 3.50%   Weighted average assumptions used to determine net pension cost:  Discount rate 3.93% 4.40% 4.54%  Rate of increase in compensation levels 3.50% 3.50% 3.50%  Expected long-term rate of return on plan assets 5.50% 5.50% 6.00% 
Net Pension Costs	   (in thousands) 2018 2017 2016  Service cost plus expected expenses and net of expected plan  participant contributions $ 1,369 $ 1,214 $ 1,142  Interest cost 1,587 1,590 1,584  Expected return on plan assets (3,275) (2,940) (2,953)  Amortization of net actuarial loss — 18 244  Net pension cost (credit) $ (319) $ (118) $ 17 
Schedule Of Net Funded Status And Accumulated Benefit Obligation	   (in thousands) 2018 2017 2016  Change in projected benefit obligation:  Projected benefit obligation at beginning of year $ 41,384 $ 37,016 $ 35,684  Service cost 1,533 1,386 1,283  Interest cost 1,587 1,590 1,584  Benefits paid (1,574) (1,510) (1,364)  Assumption changes (3,226) 2,100 (50)  Experience loss (gain) and other 766 802 (121)  Projected benefit obligation at end of year 40,470 41,384 37,016   Change in fair value of plan assets:  Fair value of plan assets at beginning of year 60,536 54,332 50,021  Actual return on plan assets (3,563) 7,497 3,919  Employer contributions — — 1,553  Plan participant contributions 333 321 301  Benefits paid (1,574) (1,510) (1,365)  Expenses (108) (104) (97)  Fair value of plan assets at end of year 55,624 60,536 54,332  Funded status at end of year $ 15,154 $ 19,152 $ 17,316  Accumulated benefit obligation $ 38,042 $ 38,544 $ 34,451 
Schedule Of Allocation Of Plan Assets	   December 31, 2018  Target Allocation Percentage of Plan Assets Weighted Average Expected Long-term Rates of Return  Cash equivalents 0% - 1% .2% <1.00%  Equity mutual funds 15% - 25% 18.1% 5.9% to 8.3%  Fixed income mutual funds 75% - 85% 81.7% 3.8% to 5.0%  100.0% 4.2% to 5.6%   December 31, 2017  Cash equivalents 0% - 1% .2% <1.00%  Equity mutual funds 15% - 25% 20.1% 6.2% to 8.4%  Fixed income mutual funds 75% - 85% 79.7% 3.4% to 4.4%  100.0% 4.5% to 5.5% 
Schedule Of Fair Value Of Plan Assets	   Fair Value Measurements Using:  (in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  December 31, 2018:  Cash equivalents:  Vanguard Prime Money Market Mutual Fund $ 137 $ — $ 137 $ —  Total cash equivalents 137 — 137 —  Equity mutual funds:  Vanguard Total Stock Market Index Fund (VITSX) 5,513 5,513 — —  Vanguard Total International Stock Index Fund (VTSNX) 4,539 4,539 — —  Total equity mutual funds 10,052 10,052 — —  Fixed income mutual funds:  Vanguard Long-Term Investment Grade Fund (VWETX) 27,260 27,260 — —  Vanguard Long-Term Bond Index Fund (VBLLX) 18,175 18,175 — —  Total fixed income mutual funds 45,435 45,435 — —  Total Plan Assets $ 55,624 $ 55,487 $ 137 $ —   December 31, 2017:  Cash equivalents:  Vanguard Prime Money Market Mutual Fund $ 117 $ — $ 117 $ —  Total cash equivalents 117 — 117 —  Equity mutual funds:  Vanguard Total Stock Market Index Fund (VITSX) 6,658 6,658 — —  Vanguard Total International Stock Index Fund (VTSNX) 5,479 5,479 — —  Total equity mutual funds 12,137 12,137 — —  Fixed income mutual funds:  Vanguard Long-Term Investment Grade Fund (VWETX) 29,065 29,065 — —  Vanguard Long-Term Bond Index Fund (VBLLX) 19,217 19,217 — —  Total fixed income mutual funds 48,282 48,282 — —  Total Plan Assets $ 60,536 $ 60,419 $ 117 $ — 
Schedule Of Estimated Future Benefit Payments	   Year (dollars in thousands) Amount  2019 $ 1,926  2020 2,067  2021 2,169  2022 2,346  2023 2,542  2024 - 2028 14,372 

Other Operating Expenses (Table

Other Operating Expenses (Tables)	12 Months Ended
	Dec. 31, 2018
Other Operating Expenses [Abstract]
Schedule Of Other Operating Expenses	   (in thousands) 2018 2017 2016  Computer services $ 1,987 $ 1,888 $ 2,631  Marketing 1,414 1,442 1,053  FDIC assessment 1,222 1,178 1,379  Consultants 542 702 1,337 

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments And Contingent Liabilities [Abstract]
Off-Balance Sheet Risks	   2018 2017  (in thousands) Fixed Rate Variable Rate Fixed Rate Variable Rate  Commitments to extend credit $ 31,496 $ 204,072 $ 90,635 $ 227,385  Standby letters of credit 3,670 — 4,244 — 
Future Minimum Lease Payments	   Year (dollars in thousands) Amount  2019 $ 2,986  2020 2,925  2021 2,816  2022 2,781  2023 2,419  Thereafter 8,117  $ 22,044 

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Of Financial Instruments [Abstract]
Assets Measured On Recurring Basis	   Fair Value Measurements Using:  (in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  December 31, 2018:  Financial Assets:  Available-for-Sale Securities:  State and municipals $ 420,038 $ — $ 420,038 $ —  Pass-through mortgage securities 65,486 — 65,486 —  Collateralized mortgage obligations 154,901 — 154,901 —  Corporate bonds 117,590 117,590  $ 758,015 $ — $ 758,015 $ —  Financial Liabilities:  Derivative - interest rate swap $ 1,130 $ — $ 1,130 $ —   December 31, 2017:  Financial Assets:  Available-for-Sale Securities:  State and municipals $ 461,323 $ — $ 461,323 $ —  Pass-through mortgage securities 71,391 — 71,391 —  Collateralized mortgage obligations 187,414 — 187,414 —  $ 720,128 $ — $ 720,128 $ — 
Assets Measured On Non-recurring Basis	   Fair Value Measurements Using:  (in thousands) Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  December 31, 2017:  Other real estate owned $ 5,125 $ — $ — $ 5,125 
Financial Instruments	   December 31, 2018 December 31, 2017  (in thousands) Level of Fair Value Hierarchy Carrying Amount Fair Value Carrying Amount Fair Value  Financial Assets:  Cash and cash equivalents Level 1 $ 47,358 $ 47,358 $ 69,672 $ 69,672  Held-to-maturity securities Level 2 2,445 2,493 5,030 5,143  Held-to-maturity securities Level 3 3,059 3,059 2,606 2,606  Loans Level 3 3,232,561 3,079,946 2,916,568 2,855,812  Restricted stock Level 1 40,686 40,686 37,314 37,314   Financial Liabilities:  Checking deposits Level 1 935,574 935,574 896,129 896,129  Savings, NOW and money market deposits Level 1 1,590,341 1,590,341 1,602,460 1,602,460  Time deposits Level 2 559,057 553,900 323,408 323,108  Short-term borrowings Level 1 388,923 388,923 281,141 281,141  Long-term debt Level 2 362,027 354,651 423,797 418,465 

Derivatives (Tables)

Derivatives (Tables) - Cash Flow Hedging [Member]	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Schedule Of Interest Rate Swaps	    Notional amount $150 million  Weighted average fixed pay rate 2.90%  Weighted average 3-month LIBOR receive rate Currently 2.38%  Weighted average maturity 2.43 Years 
Schedule Of Gains (Losses) Recorded In Accumulated Other Comprehensive Income And The Consolidated Statements Of Income	   Amount of Amount of Loss  Gain/(Loss) Amount of Loss Recognized in Other  Recognized in OCI Reclassified from OCI Noninterest Income  (in thousands) (Effective Portion) to Interest Expense (Ineffective Portion)  Interest rate contract:  Year ended December 31, 2018 $ (1,607) $ 477 $ — 
Schedule Of Cash Flow Hedges Included In the Consolidated Balance Sheets	   Notional Fair Value  (in thousands) Amount Asset Liability  Included in other assets or other liabilities $ — $ 1,130  Interest rate swap related to FHLB advances $ 150,000 

Parent Company Financial Info_2

Parent Company Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Parent Company Financial Information [Abstract]
Condensed Balance Sheets	   December 31,  (in thousands) 2018 2017  Assets:  Cash and due from banks $ 583 $ 925  Investment in subsidiary bank, at equity 390,388 354,334  Prepaid income taxes — 1,552  Deferred income tax benefits 1,924 1,381  Other assets 80 81  $ 392,975 $ 358,273  Liabilities:  Other liabilities $ 332 $ 25  Cash dividends payable 4,456 3,798  4,788 3,823  Stockholders' equity:  Common stock 2,542 2,467  Surplus 145,163 127,122  Retained earnings 249,922 224,315  397,627 353,904  Accumulated other comprehensive income (loss), net of tax (9,440) 546  388,187 354,450  $ 392,975 $ 358,273 
Condensed Statements Of Income	   Year ended December 31,  (in thousands) 2018 2017 2016  Income:  Dividends from subsidiary bank $ 15,525 $ 11,150 $ 4,500   Expenses:  Salaries 1,814 2,434 1,517  Other operating expenses 343 406 376  2,157 2,840 1,893   Income before income taxes 13,368 8,310 2,607  Income tax benefit (1,442) (1,235) (1,181)  Income before undistributed earnings of subsidiary bank 14,810 9,545 3,788  Equity in undistributed earnings 26,763 25,577 27,092  Net income $ 41,573 $ 35,122 $ 30,880   Comprehensive income $ 31,864 $ 37,272 $ 21,752 
Condensed Statements Of Cash Flows	     Year ended December 31,  (in thousands) 2018 2017 2016  Cash Flows From Operating Activities:  Net income $ 41,573 $ 35,122 $ 30,880  Adjustments to reconcile net income to net cash provided by operating activities:  Undistributed earnings of subsidiary bank (26,763) (25,577) (27,092)  Deferred income tax provision (credit) (543) 167 (84)  Stock-based compensation expense 1,814 2,434 1,517  Increase (decrease) in other liabilities 307 5 (19)  Other decreases (increases) 1,619 (1,383) 532  Net cash provided by operating activities 18,007 10,768 5,734   Cash Flows From Investing Activities:  Capital contributions to Bank subsidiary (19,000) (20,500) (38,883)   Cash Flows From Financing Activities:  Repurchase of common stock (1,541) — —  Shares withheld upon the vesting and conversion of RSUs (774) (527) (370)  Proceeds from exercise of stock options 312 917 906  Proceeds from issuance of common stock, net 18,239 22,598 43,712  Cash dividends paid (15,585) (13,703) (12,078)  Net cash provided by financing activities 651 9,285 32,170  Net decrease in cash and cash equivalents* (342) (447) (979)  Cash and cash equivalents, beginning of year 925 1,372 2,351  Cash and cash equivalents, end of year $ 583 $ 925 $ 1,372   Supplemental Schedule of Noncash Financing Activities:  Cash dividends payable $ 4,456 $ 3,798 $ 3,368  * Cash and cash equivalents is defined as cash and due from banks and includes, among other things, the checking and money market accounts with the Corporation’s wholly-owned bank subsidiary.

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Data [Abstract]
Schedule Of Unaudited Quarterly Financial Data	   (in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Total  2018  Interest income $ 32,304 $ 34,946 $ 34,859 $ 36,128 $ 138,237  Interest expense 7,148 9,061 9,568 9,953 35,730  Net interest income 25,156 25,885 25,291 26,175 102,507  Provision (credit) for loan losses 1,512 803 (1,768) (2,302) (1,755)  Noninterest income before  net securities losses 3,292 2,679 2,735 3,979 12,685  Net losses on sales of securities — — (4,960) (5,446) (10,406)  Noninterest expense 14,868 15,707 14,242 15,089 59,906  Income before income taxes 12,068 12,054 10,592 11,921 46,635  Income tax expense 957 1,739 535 1,831 5,062  Net income 11,111 10,315 10,057 10,090 41,573 Earnings per share:  Basic .44 .41 .39 .40 1.64  Diluted .44 .40 .39 .39 1.63  Comprehensive income 2,925 7,869 8,952 12,118 31,864   2017  Interest income $ 28,498 $ 28,970 $ 30,337 $ 30,460 $ 118,265  Interest expense 4,838 5,177 5,634 6,060 21,709  Net interest income 23,660 23,793 24,703 24,400 96,556  Provision for loan losses 788 1,293 1,122 1,651 4,854  Noninterest income before  net securities gains (losses) 2,396 2,681 2,484 2,466 10,027  Net gains (losses) on sales of securities 57 1 16 (1,940) (1,866)  Noninterest expense 13,347 13,468 13,394 14,643 54,852  Income before income taxes 11,978 11,714 12,687 8,632 45,011  Income tax expense 2,897 2,581 3,345 1,066 9,889  Net income 9,081 9,133 9,342 7,566 35,122 Earnings per share:  Basic .38 .38 .38 .31 1.44  Diluted .38 .37 .38 .30 1.43  Comprehensive income 9,705 11,619 9,009 6,939 37,272 

Summary Of Significant Accoun_4

Summary Of Significant Accounting Policies (Narrative) (Details)		Oct. 27, 2016	May 31, 2016USD ($)$ / sharesshares	Dec. 31, 2018USD ($)segmentshares	Dec. 31, 2017shares	Dec. 31, 2016USD ($)shares	Jan. 01, 2019USD ($)
Summary Of Significant Accounting Policies [Line Items]
Stock split ratio		1.5
Stock split				3-for-2
Stock dividend rate, percentage		50.00%
Common stock issued in public offering, net of issuance costs (in shares) | shares			1,300,000
Shares issued, price per share | $ / shares			$ 29
Common stock issued in public offering, net of issuance costs			$ 35,270,000			$ 35,270,000
Number of reportable segments | segment				1
Post Split [Member]
Summary Of Significant Accounting Policies [Line Items]
Post-split (in shares) | shares			1,950,000
Shares issued, price per share | $ / shares			$ 19.33
RSUs [Member]
Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive securities | shares				6,122	0	0
Employee Stock Option [Member]
Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive securities | shares					0	0
Award vesting period				5 years
Building [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives				31 years
Building [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives				40 years
Leasehold Improvements [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives				5 years
Leasehold Improvements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives				20 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives				3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives				10 years
Accumulated Other Comprehensive Income (Loss) [Member]
Summary Of Significant Accounting Policies [Line Items]
Reclassification of stranded tax effects upon the adoption of ASU 2018-02	[1]			$ (277,000)
Accumulated Other Comprehensive Income (Loss) [Member] | Accounting Standards Update 2018-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Reclassification of stranded tax effects upon the adoption of ASU 2018-02				$ 277,000
Subsequent Event [Member] | Accounting Standards Update 2018-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Operating Lease, Right-of-Use Asset							$ 15,000,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]							us-gaap:Assets
Operating Lease, Liability							$ 15,000,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]							us-gaap:Liabilities
[1]	The adoption of Accounting Standards Update ("ASU") 2018-02 "Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" in the first quarter of 2018 allowed the Corporation to reclassify certain stranded tax effects arising from the enactment of the Tax Cuts and Jobs Act ("Tax Act") in December 2017 from accumulated other comprehensive income to retained earnings. See "Adoption of New Accounting Standards" for more information regarding the effects of adopting ASU 2018-02.

Summary Of Significant Accoun_5

Summary Of Significant Accounting Policies (Calculation Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary Of Significant Accounting Policies [Abstract]
Net income		$ 10,090	$ 10,057	$ 10,315	$ 11,111	$ 7,566	$ 9,342	$ 9,133	$ 9,081	$ 41,573	$ 35,122	$ 30,880
Income allocated to participating securities	[1]									115	128	127
Income allocated to common stockholders										$ 41,458	$ 34,994	$ 30,753
Common shares										25,293,698	24,219,813	22,745,967
Dilutive stock options and restricted stock units	[1]									164,301	255,333	271,929
Total										25,457,999	24,475,146	23,017,896
Earnings per share:
Basic		$ 0.40	$ 0.39	$ 0.41	$ 0.44	$ 0.31	$ 0.38	$ 0.38	$ 0.38	$ 1.64	$ 1.44	$ 1.35
Diluted		$ 0.39	$ 0.39	$ 0.40	$ 0.44	$ 0.30	$ 0.38	$ 0.37	$ 0.38	$ 1.63	$ 1.43	$ 1.34
[1]	RSUs awarded in 2016 accrue dividends at the same rate as the dividends declared by the Board of Directors on the Corporation's common stock. For purposes of computing EPS, these RSUs are considered to participate with common stock in the earnings of the Corporation and, therefore, the Corporation calculates basic and diluted EPS using the two-class method. Under the two-class method, net income for the period is allocated between common stockholders and participating securities according to dividends declared and participation rights in undistributed earnings. Substantially all of the RSUs awarded in 2016 vested on December 31, 2018.

Summary Of Significant Accoun_6

Summary Of Significant Accounting Policies (Components Of Other Comprehensive Income And Related Tax Effects) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in net unrealized holding gains (losses) on available-for-sale securities:
Change arising during the period		$ (18,891)	$ (236)	$ (15,153)
Reclassification adjustment for net losses (gains) included in net income	[1]	10,406	1,867	(1,851)
Change in net unrealized holding gains (losses) on available-for-sale securities		(8,485)	1,631	(17,004)
Tax effect		(2,569)	685	(6,983)
Total		(5,916)	946	(10,021)
Change in funded status of pension plan:
Unrecognized net gain (loss) arising during the period		(4,316)	1,700	1,199
Amortization of net actuarial loss included in pension expense	[2]		18	244
Total		(4,316)	1,718	1,443
Tax effect		(1,312)	514	550
Total		(3,004)	1,204	893
Change in unrealized loss on derivative instrument:
Amount of loss recognized during the period		(1,607)
Reclassification adjustment for net interest expense included in net income	[3]	477
Change in unrealized loss on derivative instruments		(1,130)
Tax effect		(341)
Total		(789)
Other comprehensive income (loss)		$ (9,709)	$ 2,150	$ (9,128)
[1]	Represents net realized gains and losses arising from the sale of available-for-sale securities. These net realized gains and losses are included in the consolidated statements of income in the line item, "Net gains (losses) on sales of securities." See "Note B - Investment Securities" for the income tax expense or benefit related to these net realized gains and losses, which is included in the consolidated statements of income in the line item "Income tax expense."
[2]	Represents the amortization of net actuarial loss relating to the Corporation's defined benefit pension plan. This item is a component of net periodic pension cost (see "Note J - Retirement Plans") and included in the consolidated statements of income in the line item, "Other noninterest income."
[3]	Represents the net interest expense recorded on a derivative transaction and included in the consolidated statements of income in the line item "Interest expense - short-term borrowings."

Summary Of Significant Accoun_7

Summary Of Significant Accounting Policies (Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		$ 354,450	$ 305,830	$ 250,936
Current Period Change		(9,709)	2,150	(9,128)
Balance		388,187	354,450	305,830
Unrealized Holding Gains (Losses) On Available-For-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		2,600
Current Period Change		(5,916)
Adoption of ASU 2018-02	[1]	361
Balance		(2,955)	2,600
Unrealized Actuarial Losses On Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		(2,054)
Current Period Change		(3,004)
Adoption of ASU 2018-02	[1]	(638)
Balance		(5,696)	(2,054)
Unrealized Loss On Derivative Instrument [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance
Current Period Change		(789)
Adoption of ASU 2018-02	[1]
Balance		(789)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		546	(1,604)	7,524
Current Period Change		(9,709)	2,150	(9,128)
Adoption of ASU 2018-02	[1]	(277)
Balance		$ (9,440)	$ 546	$ (1,604)
[1]	The adoption of Accounting Standards Update ("ASU") 2018-02 "Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income" in the first quarter of 2018 allowed the Corporation to reclassify certain stranded tax effects arising from the enactment of the Tax Cuts and Jobs Act ("Tax Act") in December 2017 from accumulated other comprehensive income to retained earnings. See "Adoption of New Accounting Standards" for more information regarding the effects of adopting ASU 2018-02.

Investment Securities (Narrativ

Investment Securities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)security	Dec. 31, 2017USD ($)itemsecurity	Dec. 31, 2016USD ($)security
Investment Securities [Line Items]
Income tax expense (benefit) related to net realized gains (losses)	$ (2,907,000)	$ (782,000)	$ 772,000
Restricted investment securities	$ 342,712,000	$ 423,360,000
Municipal Security [Member]
Investment Securities [Line Items]
Held-to-maturity securities, Number of sales | security		1
Mortgage-Backed Securities [Member]
Investment Securities [Line Items]
Held-to-maturity securities, Number of sales | security	0		1
Held-to-maturity securities, Carrying value			$ 106,000
Held-to-maturity securities, Realized gain			$ 17,000
Mortgage-Backed Securities [Member] | Held-to-maturity Securities [Member]
Investment Securities [Line Items]
Percent of amount collected			85.00%
Excludes U.S. Government And Its Agencies [Member]
Investment Securities [Line Items]
Number of holdings greater than 10 percent of stockholders equity | item		0
State And Municipals [Member]
Investment Securities [Line Items]
Held-to-maturity securities, Carrying value		$ 354,000
Held-to-maturity securities, Realized gain		$ 1,000

Investment Securities (Amortiza

Investment Securities (Amortization Cost And Estimated Fair Value Of Investment Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Amortized Cost And Estimated Fair Values [Line Items]
Held-to-Maturity Securities, Amortized Cost	$ 5,504	$ 7,636
Held-to-Maturity Securities, Gross Unrealized Gains	48	113
Held-to-Maturity Securities, Fair Value	5,552	7,749
Available-for-Sale Securities, Amortized Cost	762,244	715,872
Available-for-Sale Securities, Gross Unrealized Gains	4,130	10,150
Available-for-Sale Securities, Gross Unrealized Losses	(8,359)	(5,894)
Available-for-Sale Securities, Fair value	758,015	720,128
Corporate Bonds [Member]
Schedule Of Amortized Cost And Estimated Fair Values [Line Items]
Available-for-Sale Securities, Amortized Cost	119,000
Available-for-Sale Securities, Gross Unrealized Losses	(1,410)
Available-for-Sale Securities, Fair value	117,590
State And Municipals [Member]
Schedule Of Amortized Cost And Estimated Fair Values [Line Items]
Held-to-Maturity Securities, Amortized Cost	5,142	6,970
Held-to-Maturity Securities, Gross Unrealized Gains	36	78
Held-to-Maturity Securities, Fair Value	5,178	7,048
Available-for-Sale Securities, Amortized Cost	422,235	453,158
Available-for-Sale Securities, Gross Unrealized Gains	3,220	10,051
Available-for-Sale Securities, Gross Unrealized Losses	(5,417)	(1,886)
Available-for-Sale Securities, Fair value	420,038	461,323
Pass-Through Mortgage Securities [Member]
Schedule Of Amortized Cost And Estimated Fair Values [Line Items]
Held-to-Maturity Securities, Amortized Cost	267	311
Held-to-Maturity Securities, Gross Unrealized Gains	11	21
Held-to-Maturity Securities, Fair Value	278	332
Available-for-Sale Securities, Amortized Cost	66,631	72,539
Available-for-Sale Securities, Gross Unrealized Gains	24	84
Available-for-Sale Securities, Gross Unrealized Losses	(1,169)	(1,232)
Available-for-Sale Securities, Fair value	65,486	71,391
Collateralized Mortgage Obligations [Member]
Schedule Of Amortized Cost And Estimated Fair Values [Line Items]
Held-to-Maturity Securities, Amortized Cost	95	355
Held-to-Maturity Securities, Gross Unrealized Gains	1	14
Held-to-Maturity Securities, Fair Value	96	369
Available-for-Sale Securities, Amortized Cost	154,378	190,175
Available-for-Sale Securities, Gross Unrealized Gains	886	15
Available-for-Sale Securities, Gross Unrealized Losses	(363)	(2,776)
Available-for-Sale Securities, Fair value	$ 154,901	$ 187,414

Investment Securities (Securiti

Investment Securities (Securities With A Continuous Unrealized Losses Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	$ 271,470	$ 195,171
Less than 12 months, Unrealized Loss	(3,280)	(1,885)
12 months or more, Fair Value	93,762	136,126
12 months or more, Unrealized Loss	(5,079)	(4,009)
Total, Fair Value	365,232	331,297
Total, Unrealized Loss	(8,359)	(5,894)
State And Municipals [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	102,882	54,732
Less than 12 months, Unrealized Loss	(1,639)	(574)
12 months or more, Fair Value	62,995	28,723
12 months or more, Unrealized Loss	(3,778)	(1,312)
Total, Fair Value	165,877	83,455
Total, Unrealized Loss	(5,417)	(1,886)
Pass-Through Mortgage Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	38,421	10,172
Less than 12 months, Unrealized Loss	(142)	(81)
12 months or more, Fair Value	23,425	52,652
12 months or more, Unrealized Loss	(1,027)	(1,151)
Total, Fair Value	61,846	62,824
Total, Unrealized Loss	(1,169)	(1,232)
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	32,577	130,267
Less than 12 months, Unrealized Loss	(89)	(1,230)
12 months or more, Fair Value	7,342	54,751
12 months or more, Unrealized Loss	(274)	(1,546)
Total, Fair Value	39,919	185,018
Total, Unrealized Loss	(363)	$ (2,776)
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	97,590
Less than 12 months, Unrealized Loss	(1,410)
Total, Fair Value	97,590
Total, Unrealized Loss	$ (1,410)

Investment Securities (Sales Of

Investment Securities (Sales Of Available-For-Sale Securities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Securities [Abstract]
Proceeds	$ 263,994	$ 135,695	$ 62,047
Gains	300	382	1,869
Losses	(10,706)	(2,249)	(18)
Net gain (loss)	$ (10,406)	$ (1,867)	$ 1,851

Investment Securities (Maturiti

Investment Securities (Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Held-to-Maturity Securities:
Held-to-maturity securities, Amortized Cost, Within one year	$ 3,059
Held-to-maturity securities, Fair Value, Within one year	3,059
Held-to-maturity securities, Amortized Cost, After 1 through 5 years	2,083
Held-to-maturity securities, Fair Value, After 1 through 5 years	2,119
Held-to-maturity securities, Amortized Cost, Mortgage-backed securities	362
Held-to-maturity securities, Fair Value, Mortgage-backed securities	374
Held-to-maturity securities, Amortized Cost	5,504	$ 7,636
Held-to-maturity securities, Fair Value	5,552	7,749
Available-for-Sale Securities:
Available-for-sale securities, Amortized Cost, Within one year	47,839
Available-for-sale securities, Fair Value, Within one year	48,271
Available-for-sale securities, Amortized Cost, After 1 through 5 years	37,588
Available-for-sale securities, Fair Value, After 1 through 5 years	37,683
Available-for-sale securities, Amortized Cost, After 5 through 10 years	284,907
Available-for-sale securities, Fair Value, After 5 through 10 years	283,676
Available-for-sale securities, Amortized Cost, After 10 years	170,901
Available-for-sale securities, Fair Value, After 10 years	167,998
Available-for-sale securities, Amortized Cost, Mortgage-backed securities	221,009
Available-for-sale securities, Fair Value, Mortgage-backed securities	220,387
Available-for-sale securities, Amortized Cost	762,244
Available-for-sale securities, Fair Value	$ 758,015	$ 720,128

Loans (Narrative) (Details)

Loans (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)contractloanitem	Dec. 31, 2017USD ($)contractpropertyloanitem	Dec. 31, 2016USD ($)contractitem
Financing Receivable, Recorded Investment, Past Due [Line Items]
Allowance for loan losses, TDR	$ 16,000	$ 18,000	$ 45,000
Number of days past due to be considered default	90 days
Minimum prior year principal balance of commercial Real estate loans required to be reviewed annually	80.00%
Deposit liabilities reclassified as loans receivable	$ 676,000	$ 297,000
Number of contracts with payment default | contract	0	0	0
Outstanding recorded investment, pre-modification	$ 782,000		$ 1,240,000
Loans to related parties		$ 36,000
Nonaccrual loans | loan	0	0
Number of commitments to lend | item	0	0	0
Number of loans in the process of foreclosure | loan	0	0
Residential Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Real estate acquired through foreclosure	$ 0	$ 0
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Outstanding recorded investment, pre-modification			$ 1,131,000
Commercial And Industrial [Member] | Time Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Outstanding recorded investment, pre-modification			$ 1,000,000
Commercial Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of OREO properties | property		1
Other real estate owned	5,125,000
OREO Valuation allowance	$ 725,000

Loans (Loans Individually And C

Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment - Loans	$ 3,423	$ 1,947
Collectively Evaluated for Impairment - Loans	3,259,976	2,948,405
Total Loans	3,263,399	2,950,352
Individually Evaluated for Impairment - Allowance for Loan Losses	16	18
Collectively Evaluated for Impairment - Allowance for Loan Losses	30,822	33,766
Ending balance, allowance	30,838	33,784	$ 30,057	$ 27,256
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment - Loans	22	48
Collectively Evaluated for Impairment - Loans	98,763	109,575
Total Loans	98,785	109,623
Collectively Evaluated for Impairment - Allowance for Loan Losses	1,158	1,441
Ending balance, allowance	1,158	1,441	1,408	928
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively Evaluated for Impairment - Loans	756,714	682,593
Total Loans	756,714	682,593
Collectively Evaluated for Impairment - Allowance for Loan Losses	5,851	6,423
Ending balance, allowance	5,851	6,423	6,119	6,858
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively Evaluated for Impairment - Loans	433,330	414,783
Total Loans	433,330	414,783
Collectively Evaluated for Impairment - Allowance for Loan Losses	3,783	4,734
Ending balance, allowance	3,783	4,734	4,296	3,674
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment - Loans	520	531
Collectively Evaluated for Impairment - Loans	90,731	95,100
Total Loans	91,251	95,631
Collectively Evaluated for Impairment - Allowance for Loan Losses	743	1,076
Ending balance, allowance	743	1,076	959	1,047
Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment - Loans	1,814	1,368
Collectively Evaluated for Impairment - Loans	1,807,837	1,557,196
Total Loans	1,809,651	1,558,564
Individually Evaluated for Impairment - Allowance for Loan Losses	16	18
Collectively Evaluated for Impairment - Allowance for Loan Losses	18,828	19,329
Ending balance, allowance	18,844	19,347	15,740	13,639
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment - Loans	743
Collectively Evaluated for Impairment - Loans	66,967	83,625
Total Loans	67,710	83,625
Collectively Evaluated for Impairment - Allowance for Loan Losses	410	689
Ending balance, allowance	410	689	1,401	1,016
Consumer And Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment - Loans	324
Collectively Evaluated for Impairment - Loans	5,634	5,533
Total Loans	5,958	5,533
Collectively Evaluated for Impairment - Allowance for Loan Losses	49	74
Ending balance, allowance	$ 49	$ 74	$ 134	$ 94

Loans (Allowance For Loan Losse

Loans (Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	$ 33,784	$ 30,057	$ 27,256
Chargeoffs	1,497	1,146	709
Recoveries	306	19	30
Provision for Loan Losses (Credit)	(1,755)	4,854	3,480
Allowance for loan losses, ending balance	30,838	33,784	30,057
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	1,441	1,408	928
Chargeoffs	683	102	445
Recoveries	34	13	4
Provision for Loan Losses (Credit)	366	122	921
Allowance for loan losses, ending balance	1,158	1,441	1,408
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	6,423	6,119	6,858
Provision for Loan Losses (Credit)	(572)	304	(739)
Allowance for loan losses, ending balance	5,851	6,423	6,119
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	4,734	4,296	3,674
Provision for Loan Losses (Credit)	(951)	438	622
Allowance for loan losses, ending balance	3,783	4,734	4,296
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	1,076	959	1,047
Chargeoffs		820
Provision for Loan Losses (Credit)	(333)	937	(88)
Allowance for loan losses, ending balance	743	1,076	959
Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	19,347	15,740	13,639
Chargeoffs	552	97	259
Recoveries	118	3	9
Provision for Loan Losses (Credit)	(69)	3,701	2,351
Allowance for loan losses, ending balance	18,844	19,347	15,740
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	689	1,401	1,016
Chargeoffs	253	100
Recoveries	150		12
Provision for Loan Losses (Credit)	(176)	(612)	373
Allowance for loan losses, ending balance	410	689	1,401
Consumer And Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning balance	74	134	94
Chargeoffs	9	27	5
Recoveries	4	3	5
Provision for Loan Losses (Credit)	(20)	(36)	40
Allowance for loan losses, ending balance	$ 49	$ 74	$ 134

Loans (Impaired Loans) (Details

Loans (Impaired Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Related Allowance	$ 16	$ 18	$ 527
Total, recorded investment	3,423	1,947	3,315
Total, unpaid principal balance	3,523	2,037	3,484
Total, average recorded investment	3,503	2,123	3,368
Total, interest income recognized	62	46	30
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with no related allowance recorded	22	48	131
Unpaid principal balance with no related allowance recorded	22	48	131
Average recorded investment with no related allowance recorded	48	67	134
Interest income recognized with no related allowance recorded	3	5	1
Total, recorded investment	22	48	131
Total, unpaid principal balance	22	48	131
Total, average recorded investment	48	67	134
Total, interest income recognized	3	5	1
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with no related allowance recorded	520	531	558
Unpaid principal balance with no related allowance recorded	604	615	636
Average recorded investment with no related allowance recorded	530	654	575
Interest income recognized with no related allowance recorded	25	21
Total, recorded investment	520	531	558
Total, unpaid principal balance	604	615	636
Total, average recorded investment	530	654	575
Total, interest income recognized	25	21
Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with no related allowance recorded	1,561	1,095	230
Unpaid principal balance with no related allowance recorded	1,573	1,102	313
Related Allowance	16	18	45
Average recorded investment with no related allowance recorded	1,566	1,122	245
Interest income recognized with no related allowance recorded	5	7
Recorded investment with an allowance recorded	253	273	626
Unpaid principal balance with an allowance recorded	253	272	634
Average recorded investment with an allowance recorded	266	280	641
Interest income recognized with an allowance recorded	12	13	29
Total, recorded investment	1,814		856
Total, unpaid principal balance	1,826		947
Total, average recorded investment	1,832		886
Total, interest income recognized	17		29
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with no related allowance recorded	743		280
Unpaid principal balance with no related allowance recorded	747		279
Related Allowance		18	482
Average recorded investment with no related allowance recorded	754		280
Recorded investment with an allowance recorded			1,490
Unpaid principal balance with an allowance recorded			1,491
Average recorded investment with an allowance recorded			1,493
Total, recorded investment	743	1,368	1,770
Total, unpaid principal balance	747	1,374	1,770
Total, average recorded investment	754	1,402	$ 1,773
Total, interest income recognized		$ 20
Consumer And Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment with no related allowance recorded	324
Unpaid principal balance with no related allowance recorded	324
Average recorded investment with no related allowance recorded	339
Interest income recognized with no related allowance recorded	17
Total, recorded investment	324
Total, unpaid principal balance	324
Total, average recorded investment	339
Total, interest income recognized	$ 17

Loans (Aging Of The Recorded In

Loans (Aging Of The Recorded Investment In Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	$ 2,135	$ 1,000
Total past due loan & nonaccrual loans	3,044	3,756
Current	3,260,355	2,946,596
Loans	3,263,399	2,950,352
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loan & nonaccrual loans	43	20
Current	98,742	109,603
Loans	98,785	109,623
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	756,714	682,593
Loans	756,714	682,593
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	433,330	414,783
Loans	433,330	414,783
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	91,251	95,631
Loans	91,251	95,631
Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	1,392	1,000
Total past due loan & nonaccrual loans	2,256	3,207
Current	1,807,395	1,555,357
Loans	1,809,651	1,558,564
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans	743
Total past due loan & nonaccrual loans	743	522
Current	66,967	83,103
Loans	67,710	83,625
Consumer And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due loan & nonaccrual loans	2	7
Current	5,956	5,526
Loans	5,958	5,533
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	866	2,735
30 to 59 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due		20
30 to 59 Days Past Due [Member] | Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	864	2,186
30 to 59 Days Past Due [Member] | Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due		522
30 to 59 Days Past Due [Member] | Consumer And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2	7
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	43	21
60 to 89 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 43
60 to 89 Days Past Due [Member] | Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due		$ 21

Loans (Loans Modified In Troubl

Loans (Loans Modified In Trouble Debt Restructurings) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)loan	Dec. 31, 2016USD ($)loan
Financing Receivable, Modifications [Line Items]
Outstanding Recorded Investment, Number of Loans | loan	2	3
Outstanding Recorded Investment, Pre-Modification	$ 782	$ 1,240
Outstanding Recorded Investment, Post-Modification	$ 822	$ 1,240
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Outstanding Recorded Investment, Number of Loans | loan		2
Outstanding Recorded Investment, Pre-Modification		$ 1,131
Outstanding Recorded Investment, Post-Modification		$ 1,131
Commercial And Industrial [Member] | Minimum [Member]
Financing Receivable, Modifications [Line Items]
Interest Rates, Pre-Modification		5.00%
Interest Rates, Post-Modification		5.00%
Commercial And Industrial [Member] | Maximum [Member]
Financing Receivable, Modifications [Line Items]
Interest Rates, Pre-Modification		6.75%
Interest Rates, Post-Modification		6.75%
Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Modifications [Line Items]
Outstanding Recorded Investment, Number of Loans | loan	1	1
Outstanding Recorded Investment, Pre-Modification	$ 432	$ 109
Outstanding Recorded Investment, Post-Modification	$ 472	$ 109
Interest Rates, Pre-Modification	5.86%	3.95%
Interest Rates, Post-Modification	4.50%	3.95%
Consumer And Other [Member]
Financing Receivable, Modifications [Line Items]
Outstanding Recorded Investment, Number of Loans | loan	1
Outstanding Recorded Investment, Pre-Modification	$ 350
Outstanding Recorded Investment, Post-Modification	$ 350
Interest Rates, Pre-Modification	6.50%
Interest Rates, Post-Modification	6.50%

Loans (Risk Ratings) (Details)

Loans (Risk Ratings) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 3,263,399	$ 2,950,352
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	98,785	109,623
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	97,684	108,846
Commercial And Industrial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		450
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	667	279
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	434	48
Commercial And Industrial [Member] | Internal Investment Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	98,785	109,623
Residential Mortgages [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,809,651	1,558,564
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	67,710	83,625
Residential Mortgages [Member] | Pass [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,807,525	1,554,168
Residential Mortgages [Member] | Pass [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	66,718	82,665
Residential Mortgages [Member] | Watch [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	312	2,200
Residential Mortgages [Member] | Watch [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		256
Residential Mortgages [Member] | Special Mention [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		828
Residential Mortgages [Member] | Special Mention [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	249	704
Residential Mortgages [Member] | Substandard [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,814	1,368
Residential Mortgages [Member] | Substandard [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	743
Residential Mortgages [Member] | Internal Investment Grade [Member] | Closed-End [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,809,651	1,558,564
Residential Mortgages [Member] | Internal Investment Grade [Member] | Revolving Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	67,710	83,625
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	756,714	682,593
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	433,330	414,783
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	91,251	95,631
Commercial Mortgages [Member] | Pass [Member] | Multifamily Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	756,714	673,128
Commercial Mortgages [Member] | Pass [Member] | Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	417,838	404,379
Commercial Mortgages [Member] | Pass [Member] | Owner-occupied Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	85,710	93,618
Commercial Mortgages [Member] | Watch [Member] | Multifamily Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		2,354
Commercial Mortgages [Member] | Watch [Member] | Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	14,194	7,567
Commercial Mortgages [Member] | Watch [Member] | Owner-occupied Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,090
Commercial Mortgages [Member] | Special Mention [Member] | Multifamily Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans		7,111
Commercial Mortgages [Member] | Special Mention [Member] | Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,298	2,837
Commercial Mortgages [Member] | Special Mention [Member] | Owner-occupied Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,911	1,482
Commercial Mortgages [Member] | Substandard [Member] | Owner-occupied Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	540	531
Commercial Mortgages [Member] | Internal Investment Grade [Member] | Multifamily Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	756,714	682,593
Commercial Mortgages [Member] | Internal Investment Grade [Member] | Other Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	433,330	414,783
Commercial Mortgages [Member] | Internal Investment Grade [Member] | Owner-occupied Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	91,251	95,631
Consumer And Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,958	5,533
Consumer And Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,958	5,236
Consumer And Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	324
Consumer And Other [Member] | Internal Investment Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,282	5,236
Residential Mortgages, Home Equity Lines, And Other Consumer Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,879,201	1,642,069
Residential Mortgages, Home Equity Lines, And Other Consumer Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	312	2,456
Residential Mortgages, Home Equity Lines, And Other Consumer Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	249	1,532
Residential Mortgages, Home Equity Lines, And Other Consumer Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,881	1,368
Residential Mortgages, Home Equity Lines, And Other Consumer Loans [Member] | Internal Investment Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,882,643	1,647,425
Commercial And Industrial Loans And Commercial Real Estate Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,357,946	1,279,971
Commercial And Industrial Loans And Commercial Real Estate Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	15,284	10,371
Commercial And Industrial Loans And Commercial Real Estate Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,876	11,709
Commercial And Industrial Loans And Commercial Real Estate Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	974	579
Commercial And Industrial Loans And Commercial Real Estate Loans [Member] | Internal Investment Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,380,080	$ 1,302,630

Premises and Equipment (Compone

Premises and Equipment (Components Of Premises And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 86,852	$ 81,740
Accumulated depreciation and amortization	(45,585)	(42,092)
Total	41,267	39,648
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	9,038	9,038
Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	28,201	26,825
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	14,175	12,652
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	32,026	30,800
Construction In Process [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 3,412	$ 2,425

Deposits (Narrative) (Details)

Deposits (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deposits [Abstract]
Time deposits, at or above FDIC insurance limit	$ 128.1	$ 75.1
Related party deposit	$ 9.2	$ 9.4

Deposits (Schedule Of Remaining

Deposits (Schedule Of Remaining Maturities Of Banks Time Deposits) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Time Deposit Maturities [Line Items]
2019	$ 283,259
2020	66,664
2021	96,509
2022	28,470
2023	21,508
Thereafter	62,647
Total time deposits	559,057
Less than $100,000 [Member]
Time Deposit Maturities [Line Items]
2019	156,538
2020	18,285
2021	30,492
2022	10,489
2023	8,698
Thereafter	25,390
Total time deposits	249,892
Deposits $100,000 or More [Member]
Time Deposit Maturities [Line Items]
2019	126,721
2020	48,379
2021	66,017
2022	17,981
2023	12,810
Thereafter	37,257
Total time deposits	$ 309,165

Borrowed Funds (Narrative) (Det

Borrowed Funds (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Interest payable	$ 1,076,000	$ 711,000
Federal home loan bank advances	2,300,000,000	2,000,000,000
Other borrowings	0	$ 0
Municipal Securities [Member]
Debt Instrument [Line Items]
Collateral amount	$ 3,100,000
Securities Sold Under Repurchase Agreements [Member]
Debt Instrument [Line Items]
Weighted average interest rate at year-end	0.05%	1.72%
Proceeds from securities sold	$ 8,923,000

Borrowed Funds (Summary of Borr

Borrowed Funds (Summary of Borrowed Funds) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Short-term borrowings:
Short-term borrowings	$ 388,923	$ 281,141
Long-term debt:
Long-term debt	362,027	423,797
Total	750,950	704,938
Securities Sold Under Repurchase Agreements [Member]
Short-term borrowings:
Short-term borrowings	8,923	11,141
Federal Home Loan Bank Advances [Member]
Short-term borrowings:
Short-term borrowings	380,000	270,000
Securities Sold Under Repurchase Agreements [Member]
Long-term debt:
Long-term debt		5,000
Federal Home Loan Bank Advances [Member]
Long-term debt:
Long-term debt	$ 362,027	$ 418,797

Borrowed Funds (Securities Sold

Borrowed Funds (Securities Sold Under Repurchase Agreements) (Details) - Securities Sold Under Repurchase Agreements [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Average daily balance during the year	$ 15,790	$ 15,903
Average interest rate during the year	1.31%	1.77%
Maximum month-end balance during the year	$ 18,548	$ 19,188
Weighted average interest rate at year-end	0.05%	1.72%

Borrowed Funds (Federal Home Lo

Borrowed Funds (Federal Home Loan Advances) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Borrowed Funds [Abstract]
Average daily balance during the year	$ 607,797	$ 524,404
Average interest rate during the year	2.05%	1.68%
Maximum month-end balance during the year	$ 742,027	$ 688,797
Weighted average interest rate at year-end	2.34%	1.75%

Borrowed Funds (Contractual Mat

Borrowed Funds (Contractual Maturity And Weighted Average Interest Rates On FHLB Advances) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Borrowed Funds [Abstract]
Overnight Amount	$ 230,000
Overnight Weighted Average Rate	2.60%
2019 Amount	$ 223,500
2019 Weighted Average Rate	2.43%
2020 Amount	$ 82,750
2020 Weighted Average Rate	1.84%
2021 Amount	$ 54,225
2021 Weighted Average Rate	1.90%
2022 Amount	$ 75,872
2022 Weighted Average Rate	2.05%
2023 Amount	$ 55,680
2023 Weighted Average Rate	2.54%
After 2023 Amount	$ 20,000
After 2023 Weighted Average Rate	2.01%
Long-term Amount	$ 512,027
Long-term Weighted Average Rate	2.22%
Amount	$ 742,027
Weighted Average Rate	2.34%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Effective tax rate	10.90%	22.00%	22.70%
Unrecognized tax benefits	$ 0	$ 0	$ 0
Tax interest and penalties expense	0	0	$ 0
Credit to income tax expense		$ 909,000
Cost of segregation study	$ 717,000

Income Taxes (Reconciliation Of

Income Taxes (Reconciliation Of Statutory Federal Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Statutory federal income tax rate	21.00%	35.00%	35.00%
State and local income taxes, net of federal income tax benefit	(0.80%)	2.00%	0.90%
Tax-exempt income, net of disallowed cost of funding	(5.80%)	(10.20%)	(11.80%)
BOLI income	(1.20%)	(1.20%)	(0.90%)
Excess tax benefit of stock-based compensation	(0.90%)	(1.70%)	(0.90%)
Impact of cost segregation study	(1.50%)
Impact of federal tax reform on deferred taxes		(2.00%)
Other	0.10%	0.10%	0.40%
Total	10.90%	22.00%	22.70%

Income Taxes (Provision For Inc

Income Taxes (Provision For Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal									$ 5,975	$ 8,139	$ 7,407
State and local									688	636	409
Total									6,663	8,775	7,816
Deferred:
Federal									(458)	335	1,114
State and local									(1,143)	779	119
Total deferred income tax expense (benefit)									(1,601)	1,114	1,233
Total income tax expense (benefit)	$ 1,831	$ 535	$ 1,739	$ 957	$ 1,066	$ 3,345	$ 2,581	$ 2,897	$ 5,062	$ 9,889	$ 9,049

Income Taxes (Net Deferred Tax

Income Taxes (Net Deferred Tax Asset (Liability)) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for loan losses and off-balance-sheet credit exposure	$ 9,312	$ 10,097
Stock-based compensation	1,384	1,382
Unrealized losses on available-for-sale securities	1,274
Accrued bonuses	686
Contract incentive	680
Net operating loss carryforwards	371
Unrealized loss on interest rate swap	341
Accrued rent expense	239	224
Asset writedown and other real estate owned valuation allowance	80	266
Directors' retirement expense	45	47
Supplemental executive retirement expense	36	17
Interest on nonperforming loans	16	55
Depreciation		724
Accrued legal settlement		12
Total deferred tax assets gross	14,464	12,824
Total deferred tax assets net	14,464	12,824
Deferred tax liabilities:
Deferred loan costs	5,462	5,142
Prepaid pension	4,545	5,615
Depreciation	675
Deferred gain on Section 1031 exchange	276
Prepaid expenses	59	146
REIT spillover dividend		3,043
Unrealized gains on available-for-sale securities		1,259
Total deferred income tax liabilities	11,017	15,205
Net deferred tax liability		$ 2,381
Net deferred tax asset	$ 3,447

Regulatory Matters (Narrative)

Regulatory Matters (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)
Regulatory Matters [Abstract]
Capital conservation buffer	1.875%
Number of preceding years of retained net profits	2 years
Dividends declared without prior approval	$ 52,340,000
Average reserve requirement	$ 33,135,000

Regulatory Matters (Schedule Of

Regulatory Matters (Schedule Of Capital Amounts And Ratios) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Tier 1 Capital to Average Assets:
Tier 1 Capital to Average Assets, Actual Capital, Amount	$ 397,036	$ 353,684
Tier 1 Capital to Average Assets, Actual Capital, Ratio	9.40%	9.34%
Tier 1 Capital to Average Assets, Minimum Capital Adequacy Requirement, Amount	$ 169,015	$ 151,398
Tier 1 Capital to Average Assets, Minimum Capital Adequacy Requirement, Ratio	4.00%	4.00%
Common Equity Tier 1 to Risk Weighted Assets
Common Equity Tier 1 Capital to Risk Weighted Assets, Actual Capital, Amount	$ 397,036	$ 353,684
Common Equity Tier 1 Capital to Risk Weighted Assets, Actual Capital, Ratio	15.29%	15.28%
Common Equity Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Amount	$ 116,840	$ 104,128
Common Equity Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Ratio	4.50%	4.50%
Tier 1 Capital to Risk Weighted Assets:
Tier 1 Capital to Risk Weighted Assets, Actual Capital, Amount	$ 397,036	$ 353,684
Tier 1 Capital to Risk Weighted Assets, Actual Capital, Ratio	15.29%	15.28%
Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Amount	$ 155,786	$ 138,837
Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Ratio	6.00%	6.00%
Total Capital to Risk Weighted Assets:
Total Capital to Risk Weighted Assets, Actual Capital, Amount	$ 428,020	$ 382,670
Total Capital to Risk Weighted Assets, Actual Capital, Ratio	16.48%	16.54%
Total Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Amount	$ 207,715	$ 185,116
Total Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Ratio	8.00%	8.00%
Bank [Member]
Tier 1 Capital to Average Assets:
Tier 1 Capital to Average Assets, Actual Capital, Amount	$ 399,237	$ 353,568
Tier 1 Capital to Average Assets, Actual Capital, Ratio	9.45%	9.34%
Tier 1 Capital to Average Assets, Minimum Capital Adequacy Requirement, Amount	$ 168,916	$ 151,358
Tier 1 Capital to Average Assets, Minimum Capital Adequacy Requirement, Ratio	4.00%	4.00%
Tier 1 Capital to Average Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provision, Amount	$ 211,145	$ 189,197
Tier 1 Capital to Average Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provision, Ratio	5.00%	5.00%
Common Equity Tier 1 to Risk Weighted Assets
Common Equity Tier 1 Capital to Risk Weighted Assets, Actual Capital, Amount	$ 399,237	$ 353,568
Common Equity Tier 1 Capital to Risk Weighted Assets, Actual Capital, Ratio	15.38%	15.29%
Common Equity Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Amount	$ 116,820	$ 104,051
Common Equity Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Ratio	4.50%	4.50%
Common Equity Tier 1 Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 168,741	$ 150,296
Common Equity Tier 1 Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Tier 1 Capital to Risk Weighted Assets:
Tier 1 Capital to Risk Weighted Assets, Actual Capital, Amount	$ 399,237	$ 353,568
Tier 1 Capital to Risk Weighted Assets, Actual Capital, Ratio	15.38%	15.29%
Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Amount	$ 155,761	$ 138,735
Tier 1 Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Ratio	6.00%	6.00%
Tier 1 Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provision, Amount	$ 207,681	$ 184,980
Tier 1 Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provision, Ratio	8.00%	8.00%
Total Capital to Risk Weighted Assets:
Total Capital to Risk Weighted Assets, Actual Capital, Amount	$ 430,221	$ 382,533
Total Capital to Risk Weighted Assets, Actual Capital, Ratio	16.57%	16.54%
Total Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Amount	$ 207,681	$ 184,980
Total Capital to Risk Weighted Assets, Minimum Capital Adequacy Requirement, Ratio	8.00%	8.00%
Total Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 259,601	$ 231,225
Total Capital to Risk Weighted Assets, Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%

Stock-based Compensation (Narra

Stock-based Compensation (Narrative) (Details)	1 Months Ended	12 Months Ended
	Jan. 31, 2019shares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)	Apr. 22, 2014shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense for share-based payments | $		$ 1,814,000	$ 2,434,000	$ 1,517,000
Income tax benefits | $		547,000	1,019,000	637,000
Intrinsic value | $		900,000	1,833,000	853,000
Unrecognized compensation cost | $		$ 1,009,000
Weighted average period expected to be recognized		1 year 4 months 21 days
Proceeds from exercise of stock options | $		$ 312,000	917,000	906,000
Tax benefit from stock option exercised | $		$ 271,000	$ 767,000	356,000
Shares issued		2,747	2,060
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted		70,688
Number of RSUs outstanding		215,084	274,134
Number of RSUs vested and convertible		80,348
Number of RSUs expected to vest and to become convertible		134,736
Total intrinsic value of RSUs converted | $		$ 3,035,000	$ 1,779,000	1,445,000
Unrecognized compensation cost | $		$ 1,008,000
Weighted average period expected to be recognized		1 year 4 months 21 days
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
Award expiration period		10 years
Unrecognized compensation cost | $		$ 1,000
Weighted average period expected to be recognized		1 year 5 months 5 days
Cash used to settle stock options | $		$ 0	$ 0	$ 0
RSUs Performance-Based Vesting [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion rate of RSUs to common stock		1.50	1.25
Equity Incentive Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized		2,250,000
Number of shares available for issuance		1,860,384
Equity Incentive Plan 2014 [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance		405,777
Number of RSU granted		272,291
Number of RSUs outstanding		215,084
Equity Incentive Plan 2014 [Member] | RSUs [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized		787,500
Equity Incentive Plan 2014 [Member] | RSUs [Member] | Awarded In 2018 [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted	107,511
Equity Incentive Plan 2014 [Member] | RSUs [Member] | Awarded In 2018 [Member] | Three Annual Equal Installment [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted	60,439
Equity Incentive Plan 2014 [Member] | RSUs Performance-Based Vesting [Member] | Awarded In 2018 [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted	47,072
Compensation Plan 2006 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized					0
Compensation Plan 2006 [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum exercise price percentage		100.00%

Stock-based Compensation (Summa

Stock-based Compensation (Summary Of RSU Vested And Expected To Vest) (Details) - RSUs [Member] - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted	70,688
Number of RSUs outstanding	215,084	274,134
Equity Incentive Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted	272,291
Number of RSUs outstanding	215,084
Vested and convertible at December 31, 2018	80,348
RSU vested and expected to vest	215,084
Equity Incentive Plan 2014 [Member] | December 31, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest	91,581
Equity Incentive Plan 2014 [Member] | December 31, 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest	18,708
Equity Incentive Plan 2014 [Member] | December 31, 2021[Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest	24,447
Equity Incentive Plan 2014 [Member] | 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted			107,274
Number of RSUs outstanding			73,661
Vested and convertible at December 31, 2018			66,115
RSU vested and expected to vest			73,661
Equity Incentive Plan 2014 [Member] | 2016 [Member] | December 31, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest			7,546
Equity Incentive Plan 2014 [Member] | 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted		94,329
Number of RSUs outstanding		76,033
RSU vested and expected to vest		76,033
Equity Incentive Plan 2014 [Member] | 2017 [Member] | December 31, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest		62,857
Equity Incentive Plan 2014 [Member] | 2017 [Member] | December 31, 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest		9,926
Equity Incentive Plan 2014 [Member] | 2017 [Member] | December 31, 2021[Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest		3,250
Equity Incentive Plan 2014 [Member] | 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSU granted	70,688
Number of RSUs outstanding	65,390
Vested and convertible at December 31, 2018	14,233
RSU vested and expected to vest	65,390
Equity Incentive Plan 2014 [Member] | 2018 [Member] | December 31, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest	21,178
Equity Incentive Plan 2014 [Member] | 2018 [Member] | December 31, 2020 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest	8,782
Equity Incentive Plan 2014 [Member] | 2018 [Member] | December 31, 2021[Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vested and expected to vest	21,197

Stock-based Compensation (Sched

Stock-based Compensation (Schedule Of Share-based Payment Award Equity Instruments Other Than Options Valuation Assumptions) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
RSUs Performance-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value	$ 27.09	$ 26.27	$ 18.17
Market price on grant date	28.25	27.90	18.17
Expected annual dividend	$ 0.60	$ 0.56
Expected term (in years)	2 years	3 years
Risk-free interest rate	2.02%	1.49%
RSUs Service-Based Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price on grant date		$ 28.15
Expected annual dividend	$ 0.60	$ 0.56
Expected term (in years)		4 years
RSUs Service-Based Vesting [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value	27.09	$ 25.35	18.17
Market price on grant date	$ 28.25	$ 27.50	18.17
Expected term (in years)	2 years	3 years
Risk-free interest rate	1.89%	1.60%
RSUs Service-Based Vesting [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value	$ 27.33	$ 26	22.17
Market price on grant date	$ 28.50		$ 22.17
Expected term (in years)	3 years
Risk-free interest rate	2.02%	1.67%

Stock-based Compensation (RSU A

Stock-based Compensation (RSU Activity) (Details) - RSUs [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, Number of RSUs | shares	274,134
Outstanding, Weighted-Average Grant-Date Fair Value | $ / shares	$ 19.64
Granted, Number of RSUs | shares	70,688
Granted, Weighted-Average Grant-Date Fair Value | $ / shares	$ 27.10
Converted, Number of RSUs | shares	(107,722)
Converted, Weighted-Average Grant-Date Fair Value | $ / shares	$ 15.58
Forfeited, Number of RSUs | shares	(22,016)
Forfeited, Weighted-Average Grant-Date Fair Value | $ / shares	$ 22.86
Outstanding, Number of RSUs | shares	215,084
Outstanding, Weighted-Average Grant-Date Fair Value | $ / shares	$ 23.79
Outstanding, Weighted Average Remaining Contractual Term	8 months 5 days
Outstanding, Aggregate Intrinsic Value | $	$ 4,291
Number of RSUs vested and convertible | shares	80,348
Vested and Convertible, Weighted-Average Grant-Date Fair Value | $ / shares	$ 19.76
Vested and Convertible, Aggregate Intrinsic Value | $	$ 1,603

Stock-based Compensation (Stock

Stock-based Compensation (Stock Option Activity) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Stock-based Compensation [Abstract]
Outstanding, Number of Options | shares	159,807
Outstanding, Weighted-Average Exercise Price | $ / shares	$ 11.35
Exercised, Number of Options | shares	(63,695)
Exercised, Weighted-Average Exercise Price | $ / shares	$ 10.66
Outstanding, Number of Options | shares	96,112
Outstanding, Weighted-Average Exercise Price | $ / shares	$ 11.80
Outstanding, Weighted-Average Remaining Contractual Term	1 year 4 months 24 days
Outstanding, Aggregate Intrinsic Value | $	$ 783
Exercisable, Number of Options | shares	95,812
Exercisable, Weighted-Average Exercise Price | $ / shares	$ 11.79
Exercisable, Weighted-Average Remaining Contractual Term	1 year 4 months 17 days
Exercisable, Aggregate Intrinsic Value | $	$ 782

Retirement Plans (Narrative) (D

Retirement Plans (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan Disclosure [Line Items]
Discount rate		4.53%	3.93%	4.40%	4.54%
Amount of defined benefit plan from discounted rate change		$ 3,093,000	$ 2,377,000	$ (643,000)
Amount of defined benefit plan from change in mortality assumption		(133,000)	277,000	(536,000)
Amount of defined benefit plan from change in the withdrawal assumption				157,000
Employer contributions				1,553,000
Net actuarial loss		$ 352,000
Percentage of portfolio that may be invested in securities with ratings below investment grade		5.00%
Percentage investment in single security, Maximum		5.00%
Maximum percentage of single investment pool or investment company of total plan assets		10.00%
Percentage of plan assets		100.00%	100.00%
401(k) Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Requisite service period		5 years
Annual vesting percentage		20.00%
Cost for contribution plan		$ 486,000	$ 441,000	396,000
401(k) Plan [Member] | Minimum [Member]
Defined Contribution Plan Disclosure [Line Items]
Age of employees eligible to participate in retirement plan		18 years
Pension Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Age of employees eligible to participate in retirement plan		21 years
Requisite service period and vested period		4 years
Requisite service for plan eligibility		12 months
Employee matching contribution, percent		2.00%
Pension benefit vested, Prior to meeting the vesting requirements		0
Estimated minimum pension contribution		$ 0
Pension Plan [Member] | Cash and Cash Equivalents [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of plan assets		0.20%	0.20%
Supplemental Executive Retirement Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Pension and other postretirement benefits expense		$ 285,000	$ 31,000	$ 197,000
Subsequent Event [Member] | Pension Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Maximum annual contributions per employee	$ 7,700,000

Retirement Plans (Projected Ben

Retirement Plans (Projected Benefit Obligation) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Weighted average assumptions used to determine the benefit obligation at year end
Discount rate	4.53%	3.93%	4.40%	4.54%
Rate of increase in compensation levels	3.50%	3.50%	3.50%
Weighted average assumptions used to determine net pension cost
Discount rate	3.93%	4.40%	4.54%
Rate of increase in compensation levels	3.50%	3.50%	3.50%
Expected long-term rate of return on plan assets	5.50%	5.50%	6.00%

Retirement Plans (Net Pension C

Retirement Plans (Net Pension Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Plans [Abstract]
Service cost plus expected expenses and net of expected plan participant contributions	$ 1,369	$ 1,214	$ 1,142
Interest cost	1,587	1,590	1,584
Expected return on plan assets	(3,275)	(2,940)	(2,953)
Amortization of net actuarial loss		18	244
Net pension cost (credit)	$ (319)	$ (118)	$ 17

Retirement Plans (Schedule Of N

Retirement Plans (Schedule Of Net Funded Status And Accumulated Benefit Obligation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Plans [Abstract]
Projected benefit obligation at beginning of year	$ 41,384	$ 37,016	$ 35,684
Service cost	1,533	1,386	1,283
Interest cost	1,587	1,590	1,584
Benefits paid	(1,574)	(1,510)	(1,364)
Assumption changes	(3,226)	2,100	(50)
Experience loss (gain) and other	766	802	(121)
Projected benefit obligation at end of year	40,470	41,384	37,016
Fair value of plan assets at beginning of year	60,536	54,332	50,021
Actual return on plan assets	(3,563)	7,497	3,919
Employer contributions			1,553
Plan participant contributions	333	321	301
Benefits paid	(1,574)	(1,510)	(1,365)
Expenses	(108)	(104)	(97)
Fair value of plan assets at end of year	55,624	60,536	54,332
Funded status at end of year	15,154	19,152	17,316
Accumulated benefit obligation	$ 38,042	$ 38,544	$ 34,451

Retirement Plans (Schedule Of A

Retirement Plans (Schedule Of Allocation Of Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	100.00%	100.00%
Weighted Average Expected Long-term Rates of Return	5.50%	5.50%	6.00%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted Average Expected Long-term Rates of Return	4.20%	4.50%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted Average Expected Long-term Rates of Return	5.60%	5.50%
Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	0.20%	0.20%
Cash Equivalents [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	0.00%	0.00%
Cash Equivalents [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	1.00%	1.00%
Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	18.10%	20.10%
Equity Mutual Funds [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	15.00%	15.00%
Weighted Average Expected Long-term Rates of Return	5.90%	6.20%
Equity Mutual Funds [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	25.00%	25.00%
Weighted Average Expected Long-term Rates of Return	8.30%	8.40%
Fixed Income Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	81.70%	79.70%
Fixed Income Mutual Funds [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	75.00%	75.00%
Weighted Average Expected Long-term Rates of Return	3.80%	3.40%
Fixed Income Mutual Funds [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	85.00%	85.00%
Weighted Average Expected Long-term Rates of Return	5.00%	4.40%

Retirement Plans (Schedule Of F

Retirement Plans (Schedule Of Fair Value Of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 55,624	$ 60,536	$ 54,332	$ 50,021
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55,487	60,419
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	137	117
Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	137	117
Cash Equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	137	117
Vanguard Prime Money Market Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	137	117
Vanguard Prime Money Market Mutual Fund [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	137	117
Equity Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,052	12,137
Equity Mutual Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	10,052	12,137
Vanguard Total Stock Market Index Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,513	6,658
Vanguard Total Stock Market Index Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,513	6,658
Vanguard Total International Stock Index Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,539	5,479
Vanguard Total International Stock Index Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,539	5,479
Fixed Income Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	45,435	48,282
Fixed Income Mutual Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	45,435	48,282
Vanguard Long-Term Investment Grade Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27,260	29,065
Vanguard Long-Term Investment Grade Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27,260	29,065
Vanguard Long-Term Bond Index Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18,175	19,217
Vanguard Long-Term Bond Index Fund [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 18,175	$ 19,217

Retirement Plans (Schedule Of E

Retirement Plans (Schedule Of Estimated Future Benefit Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Retirement Plans [Abstract]
2019	$ 1,926
2020	2,067
2021	2,169
2022	2,346
2023	2,542
2024 - 2028	$ 14,372

Other Operating Expenses (Sched

Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Operating Expenses [Abstract]
Computer services	$ 1,987	$ 1,888	$ 2,631
Marketing	1,414	1,442	1,053
FDIC assessment	1,222	1,178	1,379
Consultants	$ 542	$ 702	$ 1,337

Commitments and Contingent Li_3

Commitments and Contingent Liabilities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)item	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Salaries provided for employement contracts	$ 2,222,000
Rent expense	$ 2,966,000	$ 2,466,000	$ 2,085,000
Chief Executive Officer [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Employment contract term	3 years
Executive Vice President [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Corporate to elect extended contract	2 years
Other Senior Executives [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Employment contract term	2 years
Automatic contract renewal	1 year
Days to submit written notice of non-renewal	30 days
Corporate to elect extended contract	2 years
Related Party Leases [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Number of buildings occupied and leased from related party | item	2
Rent expense	$ 78,000	$ 78,000	$ 78,000
Home Equity Line of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet risks, Expiration period	10 years
Other Real Estate Loan [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet risks, Expiration period	60 days
Commercial Loan Commitments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off balance sheet risks, Expiration period	1 year
Residential And Commercial Mortgage [Member] | Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed rate loan, Percentage rate	4.00%
Residential And Commercial Mortgage [Member] | Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fixed rate loan, Percentage rate	4.75%
Fixed Rate, Maturity period	10 years
Unused Lines of Credit [Member] | Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Percentage of collateral held for commitments	50.00%
Unused Lines of Credit [Member] | Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Percentage of collateral held for commitments	100.00%
Unused Lines of Credit [Member] | Weighted Average [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Percentage of collateral held for commitments	96.00%

Commitments and Contingent Li_4

Commitments and Contingent Liabilities (Off-Balance Sheet Risks) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fixed Rate [Member] | Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts commitments to extend credit	$ 3,670	$ 4,244
Commitments to Extend Credit [Member] | Fixed Rate [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts commitments to extend credit	31,496	90,635
Commitments to Extend Credit [Member] | Variable Rate [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Amounts commitments to extend credit	$ 204,072	$ 227,385

Commitments and Contingent Li_5

Commitments and Contingent Liabilities (Future Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments And Contingent Liabilities [Abstract]
2019	$ 2,986
2020	2,925
2021	2,816
2022	2,781
2023	2,419
Thereafter	8,117
Total	$ 22,044

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)loan	Dec. 31, 2017USD ($)loan	Dec. 31, 2016USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value, Transfers between levels	$ 0	$ 0
Provisions (credits) for loan losses	$ 0	(482,000)	$ 449,000
Valuation allowance for other real estate owned		(725,000)
Other real estate owned		$ 5,850,000
Number of impaired loans | loan	0	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 0
Fair Value, Measurements, Nonrecurring [Member] | Commercial Mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation allowance for other real estate owned		$ 725,000

Fair Value Of Financial Instr_4

Fair Value Of Financial Instruments (Assets Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 758,015	$ 720,128
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	758,015	720,128
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	758,015	720,128
Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	117,590
Corporate Bonds [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	117,590
Corporate Bonds [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	117,590
State And Municipals [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	420,038	461,323
State And Municipals [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	420,038	461,323
State And Municipals [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	420,038	461,323
Pass-Through Mortgage Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	65,486	71,391
Pass-Through Mortgage Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	65,486	71,391
Pass-Through Mortgage Securities [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	65,486	71,391
Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	154,901	187,414
Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	154,901	187,414
Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	154,901	$ 187,414
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative	1,130
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative	$ 1,130

Fair Value Of Financial Instr_5

Fair Value Of Financial Instruments (Assets Measured On Non-recurring Basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] $ in Thousands	Dec. 31, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	$ 5,125
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned	$ 5,125

Fair Value Of Financial Instr_6

Fair Value Of Financial Instruments (Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial Assets:
Held-to-maturity securities	$ 5,552	$ 7,749
Restricted stock	40,686	37,314
Financial Liabilities:
Checking deposits	935,574	896,129
Savings, NOW and money market deposits	1,590,341	1,602,460
Time deposits	559,057
Carrying Amount [Member] | Level 1 [Member]
Financial Assets:
Cash and cash equivalents	47,358	69,672
Restricted stock	40,686	37,314
Financial Liabilities:
Checking deposits	935,574	896,129
Savings, NOW and money market deposits	1,590,341	1,602,460
Short-term borrowings	388,923	281,141
Carrying Amount [Member] | Level 2 [Member]
Financial Assets:
Held-to-maturity securities	2,445	5,030
Financial Liabilities:
Time deposits	559,057	323,408
Long-term debt	362,027	423,797
Carrying Amount [Member] | Level 3 [Member]
Financial Assets:
Held-to-maturity securities	3,059	2,606
Loans	3,232,561	2,916,568
Fair Value [Member] | Level 1 [Member]
Financial Assets:
Cash and cash equivalents	47,358	69,672
Restricted stock	40,686	37,314
Financial Liabilities:
Checking deposits	935,574	896,129
Savings, NOW and money market deposits	1,590,341	1,602,460
Short-term borrowings	388,923	281,141
Fair Value [Member] | Level 2 [Member]
Financial Assets:
Held-to-maturity securities	2,493	5,143
Financial Liabilities:
Time deposits	553,900	323,108
Long-term debt	354,651	418,465
Fair Value [Member] | Level 3 [Member]
Financial Assets:
Held-to-maturity securities	3,059	2,606
Loans	$ 3,079,946	$ 2,855,812

Revenue From Contracts With C_2

Revenue From Contracts With Customers (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue From Contracts With Customers [Abstract]
Revenue	$ 2,089,000	$ 1,912,000

Derivatives (Narrative) (Detail

Derivatives (Narrative) (Details) - USD ($)

3 Months Ended

12 Months Ended

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Dec. 31, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2016

May 22, 2018

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Interest expense

$ 9,953,000

$ 9,568,000

$ 9,061,000

$ 7,148,000

$ 6,060,000

$ 5,634,000

$ 5,177,000

$ 4,838,000

$ 35,730,000

$ 21,709,000

$ 18,002,000

Collateral posted

1,700,000

Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Cash Flow Hedge [Member]

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Interest expense

477,000

Scenario, Forecast [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Cash Flow Hedge [Member]

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Interest expense

$ 322,000

FHLB [Member]

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Interest expense

477,000

Cash Flow Hedging [Member]

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Notional amount

$ 150,000,000

$ 150,000,000

$ 150,000,000

Derivatives (Schedule Of Intere

Derivatives (Schedule Of Interest Rate Swaps) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	May 22, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 150	$ 150
Weighted average fixed pay rate	2.90%
Weighted average 3-month LIBOR receive rate	2.38%
Weighted average maturity	2 years 5 months 5 days

Derivatives (Schedule Of Gains

Derivatives (Schedule Of Gains (Losses) Recorded In Accumulated Other Comprehensive Income And The Consolidated Statements Of Income) (Details) - Cash Flow Hedging [Member] - Interest Rate Contract [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in OCI (Effective Portion)	$ (1,607)
Amount of Loss Reclassified from OCI to Interest Expense	$ 477

Derivatives (Schedule Of Cash F

Derivatives (Schedule Of Cash Flow Hedges Included In the Consolidated Balance Sheets) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Thousands	Dec. 31, 2018	May 22, 2018
Derivatives, Fair Value [Line Items]
Notional amount	$ 150,000	$ 150,000
Other Assets Or Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair Value Liability	1,130
Interest Rate Swap [Member] | FHLB [Member]
Derivatives, Fair Value [Line Items]
Notional amount	$ 150,000

Parent Company Financial Info_3

Parent Company Financial Information (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets:
Deferred income tax benefits	$ 3,447
Other assets	16,143	$ 24,925
Total assets	4,241,060	3,894,708
Liabilities:
Cash dividends payable	4,456	3,798	$ 3,368
Total liabilities	3,852,873	3,540,258
Stockholders' Equity:
Common stock	2,542	2,467
Surplus	145,163	127,122
Retained earnings	249,922	224,315
Total	397,627	353,904
Accumulated other comprehensive income (loss), net of tax	(9,440)	546
Total	388,187	354,450	305,830	$ 250,936
Total	4,241,060	3,894,708
Parent Company [Member]
Assets:
Cash and due from banks	583	925
Investment in subsidiary bank, at equity	390,388	354,334
Prepaid income taxes		1,552
Deferred income tax benefits	1,924	1,381
Other assets	80	81
Total assets	392,975	358,273
Liabilities:
Other liabilities	332	25
Cash dividends payable	4,456	3,798	$ 3,368
Total liabilities	4,788	3,823
Stockholders' Equity:
Common stock	2,542	2,467
Surplus	145,163	127,122
Retained earnings	249,922	224,315
Total	397,627	353,904
Accumulated other comprehensive income (loss), net of tax	(9,440)	546
Total	388,187	354,450
Total	$ 392,975	$ 358,273

Parent Company Financial Info_4

Parent Company Financial Information (Condensed Statements of Income) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Expenses:
Salaries									$ 2,222,000
Other operating expenses									11,755,000	$ 11,966,000	$ 12,066,000
Total noninterest expense									59,906,000	54,852,000	53,216,000
Income before income taxes	$ 11,921,000	$ 10,592,000	$ 12,054,000	$ 12,068,000	$ 8,632,000	$ 12,687,000	$ 11,714,000	$ 11,978,000	46,635,000	45,011,000	39,929,000
Income tax benefit	1,831,000	535,000	1,739,000	957,000	1,066,000	3,345,000	2,581,000	2,897,000	5,062,000	9,889,000	9,049,000
Net income	10,090,000	10,057,000	10,315,000	11,111,000	7,566,000	9,342,000	9,133,000	9,081,000	41,573,000	35,122,000	30,880,000
Comprehensive income	$ 12,118,000	$ 8,952,000	$ 7,869,000	$ 2,925,000	$ 6,939,000	$ 9,009,000	$ 11,619,000	$ 9,705,000	31,864,000	37,272,000	21,752,000
Parent Company [Member]
Income:
Dividends from subsidiary bank									15,525,000	11,150,000	4,500,000
Expenses:
Salaries									1,814,000	2,434,000	1,517,000
Other operating expenses									343,000	406,000	376,000
Total noninterest expense									2,157,000	2,840,000	1,893,000
Income before income taxes									13,368,000	8,310,000	2,607,000
Income tax benefit									(1,442,000)	(1,235,000)	(1,181,000)
Income before undistributed earnings of subsidiary bank									14,810,000	9,545,000	3,788,000
Equity in undistributed earnings									26,763,000	25,577,000	27,092,000
Net income									41,573,000	35,122,000	30,880,000
Comprehensive income									$ 31,864,000	$ 37,272,000	$ 21,752,000

Parent Company Financial Info_5

Parent Company Financial Information (Condensed Statements of Cash Flows) (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities:
Net income		$ 10,090,000	$ 10,057,000	$ 10,315,000	$ 11,111,000	$ 7,566,000	$ 9,342,000	$ 9,133,000	$ 9,081,000	$ 41,573,000	$ 35,122,000	$ 30,880,000
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax provision (credit)										(1,601,000)	1,114,000	1,233,000
Stock-based compensation expense										1,814,000	2,434,000	1,517,000
Other decreases (increases)										2,782,000	(4,937,000)	(2,849,000)
Net cash provided by operating activities										59,374,000	47,172,000	35,589,000
Cash Flows From Financing Activities:
Repurchases of common stock										(1,541,000)
Shares withheld upon the vesting and conversion of RSUs										(774,000)	(527,000)	(370,000)
Proceeds from exercise of stock options										312,000	917,000	906,000
Proceeds from issuance of common stock, net										18,239,000	22,598,000	43,712,000
Cash dividends paid										(15,585,000)	(13,703,000)	(12,078,000)
Net cash provided by financing activities										309,638,000	341,279,000	363,466,000
Net (decrease) increase in cash and cash equivalents										(22,314,000)	32,743,000	(2,706,000)
Cash and cash equivalents, beginning of year					69,672,000				36,929,000	69,672,000	36,929,000	39,635,000
Cash and cash equivalents, end of period		47,358,000				69,672,000				47,358,000	69,672,000	36,929,000
Supplemental Schedule of Noncash Financing Activities:
Cash dividends payable		4,456,000				3,798,000				4,456,000	3,798,000	3,368,000
Parent Company [Member]
Cash Flows From Operating Activities:
Net income										41,573,000	35,122,000	30,880,000
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed earnings of subsidiary bank										(26,763,000)	(25,577,000)	(27,092,000)
Deferred income tax provision (credit)										(543,000)	167,000	(84,000)
Stock-based compensation expense										1,814,000	2,434,000	1,517,000
Increase (decrease) in other liabilities										307,000	5,000	(19,000)
Other decreases (increases)										1,619,000	(1,383,000)	532,000
Net cash provided by operating activities										18,007,000	10,768,000	5,734,000
Cash Flows From Investing Activities:
Capital contributions to Bank subsidiary										(19,000,000)	(20,500,000)	(38,883,000)
Cash Flows From Financing Activities:
Repurchases of common stock										(1,541,000)
Shares withheld upon the vesting and conversion of RSUs										(774,000)	(527,000)	(370,000)
Proceeds from exercise of stock options										312,000	917,000	906,000
Proceeds from issuance of common stock, net										18,239,000	22,598,000	43,712,000
Cash dividends paid										(15,585,000)	(13,703,000)	(12,078,000)
Net cash provided by financing activities										651,000	9,285,000	32,170,000
Net (decrease) increase in cash and cash equivalents	[1]									(342,000)	(447,000)	(979,000)
Cash and cash equivalents, beginning of year					$ 925,000				$ 1,372,000	925,000	1,372,000	2,351,000
Cash and cash equivalents, end of period		583,000				925,000				583,000	925,000	1,372,000
Supplemental Schedule of Noncash Financing Activities:
Cash dividends payable		$ 4,456,000				$ 3,798,000				$ 4,456,000	$ 3,798,000	$ 3,368,000
[1]	Cash and cash equivalents is defined as cash and due from banks and includes, among other things, the checking and money market accounts with the Corporation's wholly-owned bank subsidiary.

Quarterly Financial Data (Sched

Quarterly Financial Data (Schedule Of Unaudited Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Data [Abstract]
Interest income	$ 36,128	$ 34,859	$ 34,946	$ 32,304	$ 30,460	$ 30,337	$ 28,970	$ 28,498	$ 138,237	$ 118,265	$ 104,123
Interest expense	9,953	9,568	9,061	7,148	6,060	5,634	5,177	4,838	35,730	21,709	18,002
Net interest income	26,175	25,291	25,885	25,156	24,400	24,703	23,793	23,660	102,507	96,556	86,121
Provision for loan losses	(2,302)	(1,768)	803	1,512	1,651	1,122	1,293	788	(1,755)	4,854	3,480
Noninterest income before net securities gains (losses)	3,979	2,735	2,679	3,292	2,466	2,484	2,681	2,396	12,685	10,027
Net gains (losses) on sales of securities	(5,446)	(4,960)			(1,940)	16	1	57	(10,406)	(1,866)	1,868
Noninterest expense	15,089	14,242	15,707	14,868	14,643	13,394	13,468	13,347	59,906	54,852
Income before income taxes	11,921	10,592	12,054	12,068	8,632	12,687	11,714	11,978	46,635	45,011	39,929
Income tax expense	1,831	535	1,739	957	1,066	3,345	2,581	2,897	5,062	9,889	9,049
Net income	$ 10,090	$ 10,057	$ 10,315	$ 11,111	$ 7,566	$ 9,342	$ 9,133	$ 9,081	$ 41,573	$ 35,122	$ 30,880
Basic	$ 0.40	$ 0.39	$ 0.41	$ 0.44	$ 0.31	$ 0.38	$ 0.38	$ 0.38	$ 1.64	$ 1.44	$ 1.35
Diluted	$ 0.39	$ 0.39	$ 0.40	$ 0.44	$ 0.30	$ 0.38	$ 0.37	$ 0.38	$ 1.63	$ 1.43	$ 1.34
Comprehensive income (loss)	$ 12,118	$ 8,952	$ 7,869	$ 2,925	$ 6,939	$ 9,009	$ 11,619	$ 9,705	$ 31,864	$ 37,272	$ 21,752