TrustCo Bank Corp NY (TRST) 10-Q 7 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	TRUSTCO BANK CORP N Y
Entity Central Index Key	357,301
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		96,107,596
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest and dividend income:
Interest and fees on loans	$ 37,513	$ 36,171	$ 110,219	$ 107,428
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises	465	408	1,667	1,067
State and political subdivisions	6	13	29	40
Mortgage-backed securities and collateralized mortgage obligations-residential	1,815	1,829	5,717	6,114
Corporate bonds	153	97	458	97
Small Business Administration-guaranteed participation securities	380	445	1,189	1,371
Mortgage-backed securities and collateralized mortgage obligations-commercial	22	36	66	110
Other securities	4	4	12	12
Total interest and dividends on securities available for sale	2,845	2,832	9,138	8,811
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential	276	347	888	1,123
Corporate bonds	102	156	410	464
Total interest on held to maturity securities	378	503	1,298	1,587
Federal Reserve Bank and Federal Home Loan Bank stock	125	131	393	369
Interest on federal funds sold and other short-term investments	1,927	866	4,900	2,542
Total interest income	42,788	40,503	125,948	120,737
Interest on deposits:
Interest-bearing checking	113	120	371	350
Savings	435	504	1,300	1,712
Money market deposit accounts	469	463	1,403	1,426
Time deposits	2,247	2,468	6,711	7,301
Interest on short-term borrowings	345	281	1,043	800
Total interest expense	3,609	3,836	10,828	11,589
Net interest income	39,179	36,667	115,120	109,148
Provision for loan losses	550	750	1,700	2,350
Net interest income after provision for loan losses	38,629	35,917	113,420	106,798
Noninterest income:
Trustco financial services income	1,844	1,347	5,127	4,464
Fees for services to customers	2,767	2,664	8,201	8,062
Net gain on securities transactions	0	0	0	668
Other	243	718	757	1,306
Total noninterest income	4,854	4,729	14,085	14,500
Noninterest expenses:
Salaries and employee benefits	10,360	8,995	30,129	26,932
Net occupancy expense	4,027	3,887	12,403	11,893
Equipment expense	1,669	1,596	4,653	4,950
Professional services	1,679	1,959	5,570	6,203
Outsourced services	1,650	1,465	4,650	4,441
Advertising expense	699	489	2,019	1,788
FDIC and other insurance	1,018	1,127	3,077	5,066
Other real estate expense (income), net	275	895	770	1,837
Other	2,149	2,636	7,187	7,352
Total noninterest expenses	23,526	23,049	70,458	70,462
Income before taxes	19,957	17,597	57,047	50,836
Income taxes	7,361	6,667	21,264	19,033
Net income	$ 12,596	$ 10,930	$ 35,783	$ 31,803
Net income per share:
Basic (in dollars per share)	$ 0.131	$ 0.114	$ 0.373	$ 0.333
Diluted (in dollars per share)	$ 0.131	$ 0.114	$ 0.372	$ 0.333

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 12,596	$ 10,930	$ 35,783	$ 31,803
Net unrealized holding gain on securities available for sale	938	(125)	5,460	12,475
Reclassification adjustments for net gain recognized in income	0	0	0	(668)
Tax effect	(376)	50	(2,185)	(4,723)
Net unrealized gain on securities available for sale, net of tax	562	(75)	3,275	7,084
Amortization of net actuarial gain	(72)	(8)	(208)	(25)
Amortization of prior service cost	23	22	68	67
Tax effect	20	(6)	56	(17)
Amortization of net actuarial gain and prior service cost on pension and postretirement plans, net of tax	(29)	8	(84)	25
Other comprehensive income, net of tax	533	(67)	3,191	7,109
Comprehensive income	$ 13,129	$ 10,863	$ 38,974	$ 38,912

Consolidated Statements of Fina

Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS:
Cash and due from banks	$ 41,598	$ 48,719
Federal funds sold and other short term investments	582,599	658,555
Total cash and cash equivalents	624,197	707,274
Securities available for sale	580,430	620,360
Held to maturity securities (fair value 2017 $30,731; 2016 $47,526)	29,268	45,490
Federal Reserve Bank and Federal Home Loan Bank stock	8,779	9,579
Loans, net of deferred net costs	3,578,282	3,430,586
Less: Allowance for loan losses	44,082	43,890
Net loans	3,534,200	3,386,696
Bank premises and equipment, net	35,028	35,466
Other assets	58,373	63,941
Total assets	4,870,275	4,868,806
Deposits:
Demand	397,623	377,755
Interest-bearing checking	862,067	815,534
Savings accounts	1,265,229	1,271,449
Money market deposit accounts	564,557	571,962
Time deposits	1,075,886	1,159,463
Total deposits	4,165,362	4,196,163
Short-term borrowings	216,508	209,406
Accrued expenses and other liabilities	33,477	30,551
Total liabilities	4,415,347	4,436,120
SHAREHOLDERS' EQUITY:
Capital stock par value $1; 150,000,000 shares authorized; 99,561,882 and 99,214,382 shares issued at September 30, 2017 and December 31, 2016, respectively	99,562	99,214
Surplus	172,712	171,425
Undivided profits	218,401	201,517
Accumulated other comprehensive loss, net of tax	(3,060)	(6,251)
Treasury stock at cost - 3,454,286 and 3,434,205 shares at September 30, 2017 and December 31, 2016, respectively	(32,687)	(33,219)
Total shareholders' equity	454,928	432,686
Total liabilities and shareholders' equity	$ 4,870,275	$ 4,868,806

Consolidated Statements of Fin5

Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS:
Held to maturity securities, fair value	$ 30,731	$ 47,526
SHAREHOLDERS' EQUITY:
Capital stock, par value (in dollars per share)	$ 1	$ 1
Capital stock, shares authorized (in shares)	150,000,000	150,000,000
Capital stock, shares issued (in shares)	99,561,882	99,214,382
Treasury stock, at cost (in shares)	3,454,286	3,434,205

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Capital Stock [Member]	Surplus [Member]	Undivided Profits [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2015	$ 98,973	$ 171,443	$ 184,009	$ (4,781)	$ (36,334)	$ 413,310
Net income	0	0	31,803	0	0	31,803
Other comprehensive income, net of tax	0	0	0	7,109	0	7,109
Cash dividend declared	0	0	(18,799)	0	0	(18,799)
Stock options exercised	148	612	0	0	0	760
Purchase of treasury stock	0	0	0	0	(701)	(701)
Sale of treasury stock	0	(1,130)	0	0	3,088	1,958
Stock based compensation expense	0	168	0	0	0	168
Balance at Sep. 30, 2016	99,121	171,093	197,013	2,328	(33,947)	435,608
Balance at Jun. 30, 2016				2,395
Net income						10,930
Other comprehensive income, net of tax						(67)
Balance at Sep. 30, 2016	99,121	171,093	197,013	2,328	(33,947)	435,608
Balance at Dec. 31, 2016	99,214	171,425	201,517	(6,251)	(33,219)	432,686
Net income	0	0	35,783	0	0	35,783
Other comprehensive income, net of tax	0	0	0	3,191	0	3,191
Cash dividend declared	0	0	(18,899)	0	0	(18,899)
Stock options exercised	348	1,510	0	0	0	1,858
Purchase of treasury stock	0	0	0	0	(1,683)	(1,683)
Sale of treasury stock	0	(337)	0	0	2,215	1,878
Stock based compensation expense	0	114	0	0	0	114
Balance at Sep. 30, 2017	99,562	172,712	218,401	(3,060)	(32,687)	454,928
Balance at Jun. 30, 2017				(3,593)
Net income						12,596
Other comprehensive income, net of tax						533
Balance at Sep. 30, 2017	$ 99,562	$ 172,712	$ 218,401	$ (3,060)	$ (32,687)	$ 454,928

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Consolidated Statements of Changes in Shareholders' Equity (Unaudited) [Abstract]
Cash dividend declared (in dollars per share)	$ 0.1969	$ 0.1969
Stock options exercised (in shares)	347,500	147,630
Purchase of treasury stock (in shares)	251,646	111,906
Sale of treasury stock (in shares)	231,750	316,337

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 35,783	$ 31,803
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,857	3,071
Net gain on sale of other real estate owned	(897)	(281)
Writedown of other real estate owned	823	911
Provision for loan losses	1,700	2,350
Deferred tax expense	1,122	3,899
Net amortization of securities	2,244	3,702
Stock based compensation expense	114	168
Net loss on sale/retirement of bank premises and equipment	43	(480)
Net gain on sales of securities	0	(668)
Decrease in taxes receivable	2,748	2,320
Decrease in interest receivable	257	(610)
Decrease in interest payable	(56)	(5)
Increase in other assets	(2,214)	(4,844)
Increase (decrease) in accrued expenses and other liabilities	2,957	(297)
Total adjustments	11,698	9,236
Net cash provided by operating activities	47,481	41,039
Cash flows from investing activities:
Proceeds from sales and calls of securities available for sale	109,123	205,312
Proceeds from calls and maturities of held to maturity securities	16,222	8,435
Purchases of securities available for sale	(65,977)	(250,554)
Proceeds from maturities of securities available for sale	0	550
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock	(144)	(99)
Proceeds from redemption of Federal Reserve Bank and Federal Home Loan Bank stock	944	0
Net increase in loans	(152,334)	(101,292)
Proceeds from dispositions of other real estate owned	4,593	4,860
Proceeds from dispositions of bank premises and equipment	0	674
Purchases of bank premises and equipment	(2,462)	(1,732)
Net cash (used in) provided by investing activities	(90,035)	(133,846)
Cash flows from financing activities:
Net change in deposits	(30,801)	67,860
Net change in short-term borrowings	7,102	(12,022)
Proceeds from exercise of stock options	1,858	760
Proceeds from sale of treasury stock	1,878	1,958
Purchases of treasury stock	(1,683)	(701)
Dividends paid	(18,877)	(18,776)
Net cash provided by financing activities	(40,523)	39,079
Net decrease in cash and cash equivalents	(83,077)	(53,728)
Cash and cash equivalents at beginning of period	707,274	718,156
Cash and cash equivalents at end of period	624,197	664,428
Cash paid during the year for:
Interest paid	10,884	11,594
Income taxes paid	18,508	16,944
Other non cash items:
Transfer of loans to other real estate owned	3,130	3,803
Increase in dividends payable	22	23
Change in unrealized gain on securities available for sale-gross of deferred taxes	5,460	11,807
Change in deferred tax effect on unrealized gain on securities available for sale	(2,185)	(4,723)
Amortization of net actuarial (gain) loss and prior service cost on pension and postretirement plans	(140)	42
Change in deferred tax effect of amortization of net actuarial (gain) loss and prior service cost on pension and postretirement plans	$ 56	$ (17)

Financial Statement Presentatio

Financial Statement Presentation	9 Months Ended
	Sep. 30, 2017
Financial Statement Presentation [Abstract]
Financial Statement Presentation	(1) Financial Statement Presentation The unaudited Consolidated Interim Financial Statements of TrustCo Bank Corp NY (the “Company” or “TrustCo”) include the accounts of the subsidiaries after elimination of all significant intercompany accounts and transactions. Prior period amounts are reclassified when necessary to conform to the current period presentation. The net income reported for the three and nine months ended September 30, 2017 is not necessarily indicative of the results that may be expected for the year ending December 31, 2017, or any interim periods. These financial statements consider events that occurred through the date of filing. In the opinion of the management of the Company, the accompanying unaudited Consolidated Interim Financial Statements contain all recurring adjustments necessary for fair presentation. The accompanying Consolidated Interim Financial Statements should be read in conjunction with the Company’s year-end Consolidated Financial Statements, including notes thereto, which are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. The accompanying consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flow activity required in accordance with accounting principles generally accepted in the United States. Effective January 1, 2017, the Company adopted FASB issued ASU No. 2016-09, “Improvement to Employee Share-Based Payment Accounting” which amended existing guidance to simplify aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The adoption of these amendments did not have a material impact on the Consolidated Interim Financial Statements .

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	(2) Earnings Per Share The Company computes earnings per share in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 260, Earnings Per Share (in thousands, except per share data) For the three months ended September 30: For the nine months ended September 30: 2017 2016 2017 2016 Net income $ 12,596 10,930 $ 35,783 31,803 Weighted average common shares 96,102 95,603 95,997 95,486 Stock Options 103 119 94 86 Weighted average common shares including potential dilutive shares 96,205 95,722 96,091 95,572 Basic EPS $ 0.131 0.114 $ 0.373 0.333 Diluted EPS $ 0.131 0.114 $ 0.372 0.333 For the three and nine months ended September 30, 2017, the weighted average number of antidilutive stock options excluded from diluted earnings per share was approximately 995 thousand and 1.4 million. For the three and nine months ended September 30, 2016 the weighted average number of antidilutive stock options excluded from diluted earnings per share was approximately 1.6 million. The stock options are antidilutive because the strike price is greater than the average fair value of the Company’s common stock for the periods presented.

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2017
Benefit Plans [Abstract]
Benefit Plans	(3) Benefit Plans The table below outlines the components of the Company’s net periodic benefit recognized during the three and nine months ended September 30, 2017 and 2016 for its pension and other postretirement benefit plans: For the three months ended September 30, Pension Benefits Other Postretirement Benefits (dollars in thousands) 2017 2016 2017 2016 Service cost $ 11 15 26 32 Interest cost 326 343 54 61 Expected return on plan assets (686 ) (669 ) (190 ) (180 ) Amortization of net loss (gain) 17 46 (89 ) (54 ) Amortization of prior service cost - - 23 22 Net periodic benefit $ (332 ) (265 ) (176 ) (119 ) For the nine months ended September 30, Pension Benefits Other Postretirement Benefits (dollars in thousands) 2017 2016 2017 2016 Service cost $ 33 46 77 96 Interest cost 977 1,029 164 184 Expected return on plan assets (2,058 ) (1,994 ) (571 ) (540 ) Amortization of net loss (gain) 50 138 (258 ) (163 ) Amortization of prior service cost - - 68 67 Net periodic benefit $ (998 ) (781 ) (520 ) (356 ) The Company does not expect to make contributions to its pension and postretirement benefit plans in 2017. As of September 30, 2017, no contributions have been made, however, this decision is reviewed each quarter and is subject to change based upon market conditions. Since 2003, the Company has not subsidized retiree medical insurance premiums. However, it continues to provide postretirement medical benefits to a limited number of current and retired executives in accordance with the terms of their employment contracts.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2017
Investment Securities [Abstract]
Investment Securities	(4) Investment Securities (a) Securities available for sale The amortized cost and fair value of the securities available for sale are as follows: (dollars in thousands) September 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government sponsored enterprises $ 125,024 93 1,459 123,658 State and political subdivisions 521 12 - 533 Corporate bonds 40,442 - 61 40,381 Mortgage backed securities and collateralized mortgage obligations - residential 338,519 164 3,152 335,531 Small Business Administration- guaranteed participation securities 71,169 - 1,351 69,818 Mortgage backed securities and collateralized mortgage obligations - commercial 9,875 - 51 9,824 Other 650 - - 650 Total debt securities 586,200 269 6,074 580,395 Equity securities 35 - - 35 Total securities available for sale $ 586,235 269 6,074 580,430 (dollars in thousands) December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government sponsored enterprises $ 119,887 - 2,621 117,266 State and political subdivisions 873 13 - 886 Mortgage backed securities and collateralized mortgage obligations - residential 378,068 123 5,883 372,308 Corporate bonds 40,956 - 251 40,705 Small Business Administration- guaranteed participation securities 81,026 - 2,527 78,499 Mortgage backed securities and collateralized mortgage obligations - commercial 10,130 - 119 10,011 Other 650 - - 650 Total debt securities 631,590 136 11,401 620,325 Equity securities 35 - - 35 Total securities available for sale $ 631,625 136 11,401 620,360 The following table distributes the debt securities included in the available for sale portfolio as of September 30, 2017, based on the securities’ final maturity. Actual maturities may differ because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty. Securities not due at a single maturity date are presented separately: (dollars in thousands) Amortized Cost Fair Value Due in one year or less $ 50,331 50,283 Due in one year through five years 106,105 104,749 Due after five years through ten years 10,201 10,190 Due after ten years - - Mortgage backed securities and collateralized mortgage obligations - residential 338,519 335,531 Small Business Administration- guaranteed participation securities 71,169 69,818 Mortgage backed securities and collateralized mortgage obligations - commercial 9,875 9,824 $ 586,200 580,395 Gross unrealized losses on securities available for sale and the related fair values aggregated by the length of time that individual securities have been in an unrealized loss position, were as follows: (dollars in thousands) September 30, 2017 Less than 12 months 12 months or more Total Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss U.S. government sponsored enterprises $ 24,887 113 88,544 1,346 113,431 1,459 Corporate bonds - - 40,381 61 40,381 61 Mortgage backed securities and collateralized mortgage obligations - residential 228,925 1,972 82,423 1,180 311,348 3,152 Small Business Administration- guaranteed participation securities 20,070 270 49,748 1,081 69,818 1,351 Mortgage backed securities and collateralized mortgage obligations - commercial - - 9,824 51 9,824 51 Total $ 273,882 2,355 270,920 3,719 544,802 6,074 (dollars in thousands) December 31, 2016 Less than 12 months 12 months or more Total Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss U.S. government sponsored enterprises $ 102,266 2,621 - - 102,266 2,621 Corporate bonds 40,705 251 - - 40,705 251 Mortgage backed securities and collateralized mortgage obligations - residential 359,622 5,766 4,713 117 364,335 5,883 Small Business Administration- guaranteed participation securities 64,560 1,960 13,940 567 78,500 2,527 Mortgage backed securities and collateralized mortgage obligations - commercial 10,011 119 - - 10,011 119 Total $ 577,164 10,717 18,653 684 595,817 11,401 The proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses from sales and calls during the three and nine months ended September 30, 2017 and 2016 are as follows: (dollars in thousands) Three months ended September 30, 2017 2016 Proceeds from sales $ - - Proceeds from calls 35,554 70,762 Gross realized gains - - Gross realized losses - - (dollars in thousands) Nine months ended September 30, 2017 2016 Proceeds from sales $ - 44,829 Proceeds from calls 109,123 160,483 Gross realized gains - 668 Gross realized losses - - There were no sales of securities available for sale during the three and nine months ended September 30, 2017. For the three and nine months ended September 30, 2016, income tax expense recognized on net gains on sales of securities available for sale was approximately $267 thousand. (b) Held to maturity securities The amortized cost and fair value of the held to maturity securities are as follows: (dollars in thousands) September 30, 2017 Amortized Cost Gross Unrecognized Gains Gross Unrecognized Losses Fair Value Mortgage backed securities and collateralized mortgage obligations - residential $ 29,268 1,463 - 30,731 Total held to maturity $ 29,268 1,463 - 30,731 (dollars in thousands) December 31, 2016 Amortized Gross Gross Fair Mortgage backed securities and collateralized mortgage obligations - residential $ 35,500 1,736 - 37,236 Corporate bonds 9,990 300 - 10,290 Total held to maturity $ 45,490 2,036 - 47,526 The following table distributes the debt securities included in the held to maturity portfolio as of September 30, 2017, based on the securities’ final maturity. Actual maturities may differ because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty. Securities not due at a single maturity date are presented separately: (dollars in thousands) Amortized Cost Fair Value Mortgage backed securities and collateralized mortgage obligations - residential 29,268 30,731 $ 29,268 30,731 There were no held to maturity securities in an unrecognized loss position as of September 30, 2017 or December 31, 2016. There were no sales or transfers of held to maturity securities during the three and nine months ended September 30, 2017 and 2016 . (c) Other-Than-Temporary Impairment Management evaluates securities for other-than-temporary impairment (“OTTI”) at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. The investment securities portfolio is evaluated for OTTI by segregating the portfolio by type and applying the appropriate OTTI model. Investment securities classified as available for sale or held to maturity are evaluated for OTTI under FASB ASC Topic 320 , Investments – Debt and Equity Securities . In determining OTTI under the ASC 320 model, 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 the Company 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 any 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, the amount of the OTTI recognized in earnings depends on whether management intends to sell the security or it is more likely than not it will be required to sell the security before recovery of its amortized cost basis. If management intends to sell or it is more likely than not it will be required to sell the security before recovery of its amortized cost basis, the OTTI shall be recognized in earnings equal to the entire difference between the investment’s amortized cost basis and its fair value at the balance sheet date. If management does not intend to sell the security and it is not more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis, the OTTI on debt securities shall be separated into the amount representing the credit loss and the amount related to all other factors. The amount of the total OTTI related to the credit loss is determined based on the present value of cash flows expected to be collected and is recognized in earnings. The amount of the total OTTI related to other factors is recognized in other comprehensive income, net of applicable taxes. The previous amortized cost basis less the OTTI recognized in earnings becomes the new amortized cost basis of the investment. As of September 30, 2017, the Company’s security portfolios included certain securities which were in an unrealized loss position. The declines in fair value are attributable to changes in interest rates, and not credit quality, and because the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery, the Company does not consider these securities to be other-than-temporarily impaired at September 30, 2017 .

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2017
Loans and Allowance for Loan Losses [Abstract]
Loans and Allowance for Loan Losses	(5) Loans and Allowance for Loan Losses The following table presents the recorded investment in loans by loan class: September 30, 2017 (dollars in thousands) New York and other states* Florida Total Commercial: Commercial real estate $ 152,228 12,980 165,208 Other 21,754 319 22,073 Real estate mortgage - 1 to 4 family: First mortgages 2,251,152 742,697 2,993,849 Home equity loans 64,556 12,565 77,121 Home equity lines of credit 267,143 44,610 311,753 Installment 6,796 1,482 8,278 Total loans, net $ 2,763,629 814,653 3,578,282 Less: Allowance for loan losses 44,082 Net loans $ 3,534,200 December 31, 2016 (dollars in thousands) New York and other states* Florida Total Commercial: Commercial real estate $ 151,366 12,243 163,609 Other 27,539 46 27,585 Real estate mortgage - 1 to 4 family: First mortgages 2,158,904 665,183 2,824,087 Home equity loans 60,892 10,754 71,646 Home equity lines of credit 286,586 48,255 334,841 Installment 7,048 1,770 8,818 Total loans, net $ 2,692,335 738,251 3,430,586 Less: Allowance for loan losses 43,890 Net loans $ 3,386,696 *Includes New York, New Jersey, Vermont and Massachusetts At September 30, 2017 and December 31, 2016, the Company had approximately $27.6 million and $24.8 million of real estate construction loans, respectively. Of the $27.6 million in real estate construction loans at September 30, 2017, approximately $17.2 million are secured by first mortgages to residential borrowers while approximately $10.4 million were to commercial borrowers for residential construction projects. Of the $24.8 million in real estate construction loans at December 31, 2016, approximately $16.3 million are secured by first mortgages to residential borrowers while approximately $8.5 million were to commercial borrowers for residential construction projects. The vast majority of construction loans are in the Company’s New York market. TrustCo lends in the geographic territory of its branch locations in New York, Florida, Massachusetts, New Jersey and Vermont. Although the loan portfolio is diversified, a portion of its debtors’ ability to repay depends significantly on the economic conditions prevailing in the respective geographic territory. The following tables present the recorded investment in non-accrual loans by loan class: September 30, 2017 (dollars in thousands) New York and other states Florida Total Loans in non-accrual status: Commercial: Commercial real estate $ 1,596 - 1,596 Other 100 - 100 Real estate mortgage - 1 to 4 family: First mortgages 17,048 1,764 18,812 Home equity loans 35 - 35 Home equity lines of credit 3,843 131 3,974 Installment 30 - 30 Total non-accrual loans 22,652 1,895 24,547 Restructured real estate mortgages - 1 to 4 family 40 - 40 Total nonperforming loans $ 22,692 1,895 24,587 December 31, 2016 (dollars in thousands) New York and Florida Total Loans in non-accrual status: Commercial: Commercial real estate $ 1,843 - 1,843 Other - - - Real estate mortgage - 1 to 4 family: First mortgages 17,727 1,659 19,386 Home equity loans 95 - 95 Home equity lines of credit 3,376 270 3,646 Installment 48 - 48 Total non-accrual loans 23,089 1,929 25,018 Restructured real estate mortgages - 1 to 4 family 42 - 42 Total nonperforming loans $ 23,131 1,929 25,060 The Company transfers loans to other real estate owned, at fair value less cost to sell, in the period the Company obtains physical possession of the property (through legal title or through a deed in lieu). As of September 30, 2017 and December 31, 2016, other estate owned included $2.5 million and $3.5 million of residential foreclosed properties, respectively. Non-accrual residential mortgage loans that are in the process of foreclosure had a recorded investment of $13.3 million and $12.5 million as of September 30, 2017 and December 31, 2016, respectively. The following tables present the aging of the recorded investment in past due loans by loan class and by region as of September 30, 2017 and December 31, 2016: New York and other states: September 30, 2017 (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ - - 1,481 1,481 150,747 152,228 Other - - 100 100 21,654 21,754 Real estate mortgage - 1 to 4 family: First mortgages 4,972 1,973 9,560 16,505 2,234,647 2,251,152 Home equity loans 70 - 3 73 64,483 64,556 Home equity lines of credit 337 167 2,235 2,739 264,404 267,143 Installment 39 29 10 78 6,718 6,796 Total $ 5,418 2,169 13,389 20,976 2,742,653 2,763,629 Florida: (dollars in thousands) 30-59 60-89 Days 90+ Days Total 30+ days Current Total Commercial: Commercial real estate $ - - - - 12,980 12,980 Other - - - - 319 319 Real estate mortgage - 1 to 4 family: First mortgages 845 291 1,323 2,459 740,238 742,697 Home equity loans - - - - 12,565 12,565 Home equity lines of credit - - - - 44,610 44,610 Installment - - - - 1,482 1,482 Total $ 845 291 1,323 2,459 812,194 814,653 Total: (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ - - 1,481 1,481 163,727 165,208 Other - - 100 100 21,973 22,073 Real estate mortgage - 1 to 4 family: First mortgages 5,817 2,264 10,883 18,964 2,974,885 2,993,849 Home equity loans 70 - 3 73 77,048 77,121 Home equity lines of credit 337 167 2,235 2,739 309,014 311,753 Installment 39 29 10 78 8,200 8,278 Total $ 6,263 2,460 14,712 23,435 3,554,847 3,578,282 New York and other states: December 31, 2016 (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ 50 43 1,706 1,799 149,567 151,366 Other - - - - 27,539 27,539 Real estate mortgage - 1 to 4 family: First mortgages 6,379 2,924 9,643 18,946 2,139,958 2,158,904 Home equity loans 50 3 74 127 60,765 60,892 Home equity lines of credit 685 111 1,839 2,635 283,951 286,586 Installment 34 32 15 81 6,967 7,048 Total $ 7,198 3,113 13,277 23,588 2,668,747 2,692,335 Florida: (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ - - - - 12,243 12,243 Other - - - - 46 46 Real estate mortgage - 1 to 4 family: First mortgages 1,942 69 1,255 3,266 661,917 665,183 Home equity loans 19 - - 19 10,735 10,754 Home equity lines of credit - - 156 156 48,099 48,255 Installment 30 6 - 36 1,734 1,770 Total $ 1,991 75 1,411 3,477 734,774 738,251 Total: (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ 50 43 1,706 1,799 161,810 163,609 Other - - - - 27,585 27,585 Real estate mortgage - 1 to 4 family: First mortgages 8,321 2,993 10,898 22,212 2,801,875 2,824,087 Home equity loans 69 3 74 146 71,500 71,646 Home equity lines of credit 685 111 1,995 2,791 332,050 334,841 Installment 64 38 15 117 8,701 8,818 Total $ 9,189 3,188 14,688 27,065 3,403,521 3,430,586 At September 30, 2017 and December 31, 2016, there were no loans that were 90 days past due and still accruing interest. As a result, non-accrual loans include all loans 90 days or more past due as well as certain loans less than 90 days past due that were placed on non-accrual status for reasons other than delinquent status. There are no commitments to extend further credit on non - Activity in the allowance for loan losses by portfolio segment is summarized as follows: (dollars in thousands) For the three months ended September 30, 2017 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 4,596 38,871 695 44,162 Loans charged off: New York and other states* - 747 65 812 Florida - 31 4 35 Total loan chargeoffs - 778 69 847 Recoveries of loans previously charged off: New York and other states* - 137 8 145 Florida - 72 - 72 Total recoveries - 209 8 217 Net loans charged off - 569 61 630 Provision for loan losses 24 434 92 550 Balance at end of period $ 4,620 38,736 726 44,082 (dollars in thousands) For the three months ended September 30, 2016 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 5,046 38,589 429 44,064 Loans charged off: New York and other states* 356 549 57 962 Florida - 2 3 5 Total loan chargeoffs 356 551 60 967 Recoveries of loans previously charged off: New York and other states* 3 78 20 101 Florida - 2 - 2 Total recoveries 3 80 20 103 Net loans charged off 353 471 40 864 Provision (credit) for loan losses 505 (51 ) 296 750 Balance at end of period $ 5,198 38,067 685 43,950 (dollars in thousands) For the nine months ended September 30, 2017 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 4,929 38,231 730 43,890 Loans charged off: New York and other states* 72 1,699 146 1,917 Florida - 167 19 186 Total loan chargeoffs 72 1,866 165 2,103 Recoveries of loans previously charged off: New York and other states* 8 494 21 523 Florida - 72 - 72 Total recoveries 8 566 21 595 Net loans charged off 64 1,300 144 1,508 Provision for loan losses (245 ) 1,805 140 1,700 Balance at end of period $ 4,620 38,736 726 44,082 (dollars in thousands) For the nine months ended September 30, 2016 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 4,491 39,753 518 44,762 Loans charged off: New York and other states* 688 2,528 230 3,446 Florida - 103 20 123 Total loan chargeoffs 688 2,631 250 3,569 Recoveries of loans previously charged off: New York and other states* 44 313 46 403 Florida - 4 - 4 Total recoveries 44 317 46 407 Net loans charged off 644 2,314 204 3,162 Provision for loan losses 1,351 628 371 2,350 Balance at end of period $ 5,198 38,067 685 43,950 The Company has identified non - The following tables present the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2017 and December 31, 2016: September 30, 2017 (dollars in thousands) Commercial Loans 1-to-4 Family Installment Loans Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ - - - - Collectively evaluated for impairment 4,620 38,736 726 44,082 Total ending allowance balance $ 4,620 38,736 726 44,082 Loans: Individually evaluated for impairment $ 2,969 21,585 - 24,554 Collectively evaluated for impairment 184,312 3,361,138 8,278 3,553,728 Total ending loans balance $ 187,281 3,382,723 8,278 3,578,282 December 31, 2016 (dollars in thousands) Commercial Loans 1-to-4 Family Installment Loans Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ - - - - Collectively evaluated for impairment 4,929 38,231 730 43,890 Total ending allowance balance $ 4,929 38,231 730 43,890 Loans: Individually evaluated for impairment $ 2,418 21,607 - 24,025 Collectively evaluated for impairment 188,776 3,208,967 8,818 3,406,561 Total ending loans balance $ 191,194 3,230,574 8,818 3,430,586 A loan for which the terms have been modified, and for which the borrower is experiencing financial difficulties, is considered a TDR and is classified as impaired. TDR’s at September 30, 2017 and December 31, 2016 are measured at the present value of estimated future cash flows using the loan’s effective rate at inception or the fair value of the underlying collateral if the loan is considered collateral dependent. The following tables present impaired loans by loan class as of September 30, 2017 and December 31, 2016: The following table presents impaired loans by loan class: New York and other states: September 30, 2017 (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ 2,869 3,916 - 2,879 Other 100 100 - 100 Real estate mortgage - 1 to 4 family: First mortgages 16,043 16,351 - 16,715 Home equity loans 252 272 - 265 Home equity lines of credit 2,330 2,524 - 2,128 Total $ 21,594 23,163 - 22,087 Florida: (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ - - - - Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 2,335 2,441 - 2,217 Home equity loans 90 90 - 92 Home equity lines of credit 535 535 - 568 Total $ 2,960 3,066 - 2,877 Total: (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ 2,869 3,916 - 2,879 Other 100 100 - 100 Real estate mortgage - 1 to 4 family: First mortgages 18,378 18,792 - 18,932 Home equity loans 342 362 - 358 Home equity lines of credit 2,865 3,059 - 2,696 Total $ 24,554 26,229 - 24,964 New York and other states: December 31, 2016 (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ 2,418 3,470 - 2,214 Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 16,675 17,439 - 15,665 Home equity loans 269 305 - 251 Home equity lines of credit 1,999 2,160 - 1,806 Total $ 21,361 23,374 - 19,936 Florida: (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ - - - - Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 2,009 2,100 - 1,800 Home equity loans 94 94 - 81 Home equity lines of credit 561 633 - 591 Total $ 2,664 2,827 - 2,472 Total: (dollars in thousands) Recorded Unpaid Related Average Commercial: Commercial real estate $ 2,418 3,470 - 2,214 Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 18,684 19,539 - 17,465 Home equity loans 363 399 - 332 Home equity lines of credit 2,560 2,793 - 2,397 Total $ 24,025 26,201 - 22,408 The Company has not committed to lend additional amounts to customers with outstanding loans that are classified as impaired. Interest income recognized on impaired loans was not material during the three and nine months ended September 30, 2017 and 2016 . As of September 30, 2017 and December 31, 2016 impaired loans included approximately $11.0 million and $11.5 million of loans in accruing status that were identified as TDR’s in accordance with regulatory guidance related to Chapter 7 bankruptcy loans, respectively. Management evaluates impairment on impaired loans on a quarterly basis. If, during this evaluation, impairment of the loan is identified, a charge off is taken at that time. As a result, as of September 30, 2017 and December 31, 2016, based upon management’s evaluation and due to the sufficiency of chargeoffs taken, none of the allowance for loan losses has been allocated to a specific impaired loan(s). The following table presents, by class, loans that were modified as TDR’s: Three months ended 9/30/2017 Three months ended 9/30/2016 New York and other states*: Pre-Modification Post-Modification Pre-Modification Post-Modification (dollars in thousands) Number of Outstanding Outstanding Number of Outstanding Outstanding Commercial: Commercial real estate - $ - - - $ - - Real estate mortgage - 1 to 4 family: First mortgages 7 $ 941 $ 941 7 $ 655 $ 655 Home equity loans - - - 1 44 44 Home equity lines of credit 3 296 296 2 183 183 Total 10 $ 1,237 $ 1,237 10 $ 882 $ 882 Florida: (dollars in thousands) Number of Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Commercial: Commercial real estate - $ - - - $ - - Real estate mortgage - 1 to 4 family: First mortgages 2 $ 251 $ 251 - $ - $ - Home equity loans - - - - - - Home equity lines of credit - - - - - - Total 2 $ 251 $ 251 - $ - $ - Nine months ended 9/30/2017 Nine months ended 9/30/2016 New York and other states*: Pre-Modification Post-Modification Pre-Modification Post-Modification (dollars in thousands) Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Commercial: Commercial real estate 3 $ 747 $ 747 - $ - $ - Real estate mortgage - 1 to 4 family: First mortgages 25 $ 3,986 3,986 27 $ 2,383 2,383 Home equity loans 1 13 13 1 44 44 Home equity lines of credit 8 457 457 10 316 316 Total 37 $ 5,203 $ 5,203 38 $ 2,743 $ 2,743 Florida: (dollars in thousands) Number of Contracts Pre-Modification Recorded Investment Post-Modification Recorded Investment Number of Contracts Pre-Modification Recorded Investment Post-Modification Recorded Investment Commercial: Commercial real estate - $ - - - $ - - Real estate mortgage - 1 to 4 family: First mortgages 7 $ 718 $ 718 2 $ 408 $ 408 Home equity loans - - - 1 45 45 Home equity lines of credit 1 70 70 1 6 6 Total 8 $ 788 $ 788 4 $ 459 $ 459 The addition of these TDR’s did not have a significant impact on the allowance for loan losses . In situations where the Company considers a loan modification, management determines whether the borrower is experiencing financial difficulty by performing an evaluation of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s underwriting policy. Generally, the modification of the terms of loans was the result of the borrower filing for bankruptcy protection. Chapter 13 bankruptcies generally include the deferral of all past due amounts for a period of generally 60 months in accordance with the bankruptcy court order. In the case of Chapter 7 bankruptcies, as previously noted, even though there is no modification of terms, the borrowers’ debt to the Company was discharged and they did not reaffirm the debt. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. In situations involving a borrower filing for Chapter 13 bankruptcy protection, however, a loan is considered to be in payment default once it is 30 days contractually past due, consistent with the treatment by the bankruptcy court. The following table presents, by class, TDR’s that defaulted during the three and nine months ended September 30, 2017 and 2016 which had been modified within the last twelve months: Three months ended 9/30/2017 Three months ended 9/30/2016 New York and other states*: Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages 2 $ 236 - $ - Home equity lines of credit - - - - Total 2 $ 236 - $ - Florida: (dollars in thousands) Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages - $ - - $ - Total - $ - - $ - Nine months ended 9/30/2017 Nine months ended 9/30/2016 New York and other states*: Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages 2 $ 236 1 $ 107 Home equity loans - - - - Home equity lines of credit 1 3 - - Total 3 $ 239 1 $ 107 Florida: (dollars in thousands) Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages 1 $ 77 - $ - Home equity lines of credit 1 $ 70 1 $ 46 Total 2 $ 147 1 $ 46 The TDR’s that subsequently defaulted described above did not have a material impact on the allowance for loan losses. The Company categorizes non-homogenous loans into risk categories based on relevant information about the ability of borrowers to service their debt, such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. On at least an annual basis, the Company’s loan grading process analyzes non-homogeneous loans, such as commercial and commercial real estate loans, individually by grading the loans based on credit risk. The loan grades assigned to all loan types are tested by the Company’s internal loan review department in accordance with the Company’s internal loan review policy. The Company uses the following definitions for classified loans: Special Mention Substandard Doubtful Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be “pass” rated loans. As of September 30, 2017 and December 31, 2016, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows: September 30, 2017 New York and other states: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 142,390 9,838 152,228 Other 20,154 1,600 21,754 $ 162,544 11,438 173,982 Florida: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 12,980 - 12,980 Other 319 - 319 $ 13,299 - 13,299 Total: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 155,370 9,838 165,208 Other 20,473 1,600 22,073 $ 175,843 11,438 187,281 December 31, 2016 New York and other states: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 136,676 14,690 151,366 Other 25,442 2,097 27,539 $ 162,118 16,787 178,905 Florida: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 12,243 - 12,243 Other 46 - 46 $ 12,289 - 12,289 Total: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 148,919 14,690 163,609 Other 25,488 2,097 27,585 $ 174,407 16,787 191,194 Included in classified loans in the above tables are non-accrual loans of $1.2 million and $1.8 million at September 30, 2017 and December 31, 2016, respectively. For homogeneous loan pools, such as residential mortgages, home equity lines of credit, and installment loans, the Company uses payment status to identify the credit risk in these loan portfolios. Payment status is reviewed on a daily basis by the Company’s collection area and on a monthly basis with respect to determining the adequacy of the allowance for loan losses. The payment status of these homogeneous pools as of September 30, 2017 and December 31, 2016 is included in the aging of the recorded investment of the past due loans table. In addition, the total nonperforming portion of these homogeneous loan pools as of September 30, 2017 and December 31, 2016 is presented in the non-accrual loans table.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2017
Fair Value of Financial Instruments [Abstract]
Fair Value of Financial Instruments	(6) Fair Value of Financial Instruments FASB Topic 820, Fair Value Measurement Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity can access as of the measurement date. Level 2 – Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the value that market participants would use in pricing an asset or liability. The Company used the following methods and significant assumptions to estimate the fair value of assets and liabilities: Securities Available for Sale Other Real Estate Owned Impaired Loans Indications of value for both collateral-dependent impaired loans and other real estate owned are obtained from third party providers or the Company’s internal Appraisal Department. All indications of value are reviewed for reasonableness by a member of the Appraisal Department for the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value via comparison with independent data sources such as recent market data or industry-wide statistics. Assets and liabilities measured at fair value under ASC 820 on a recurring basis are summarized below: Fair Value Measurements at Carrying Quoted Prices in Significant Significant (dollars in thousands) Securities available for sale: U.S. government sponsored enterprises $ 123,658 $ - $ 123,658 $ - State and political subdivisions 533 - 533 - Corporate bonds 40,381 - 40,381 - Mortgage backed securities and collateralized mortgage obligations - residential 335,531 - 335,531 - Small Business Administration- guaranteed participation securities 69,818 - 69,818 - Mortgage backed securities and collateralized mortgage obligations - commercial 9,824 - 9,824 - Other securities 685 35 650 - Total securities available for sale $ 580,430 $ 35 $ 580,395 $ - Fair Value Measurements at Carrying Quoted Prices in Significant Significant (dollars in thousands) Securities available for sale: U.S. government sponsored enterprises $ 117,266 $ - $ 117,266 $ - State and political subdivisions 886 - 886 - Mortgage backed securities and collateralized mortgage obligations - residential 372,308 - 372,308 - Corporate bonds 40,705 - 40,705 - Small Business Administration- guaranteed participation securities 78,499 - 78,499 - Mortgage backed securities and collateralized mortgage obligations - commercial 10,011 - 10,011 - Other securities 685 35 650 - Total securities available for sale $ 620,360 $ 35 $ 620,325 $ - There were no transfers between Level 1 and Level 2 during the three and nine months ended September 30, 2017 and 2016 . Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at Carrying Quoted Prices in Significant Significant Valuation technique Unobservable inputs Range (Weighted Average) (dollars in thousands) Other real estate owned $ 2,879 $ - $ - $ 2,879 Sales comparison approach Adjustments for differences between comparable sales 2% - 10% (4%) Impaired loans: Real estate mortgage - 1 to 4 family 651 - - 651 Sales comparison approach Adjustments for differences between comparable sales 2% - 5% (4%) Fair Value Measurements at Carrying Quoted Prices in Significant Significant Valuation technique Unobservable inputs Range (Weighted Average) (dollars in thousands) Other real estate owned $ 4,268 $ - $ - $ 4,268 Sales comparison approach Adjustments for differences between comparable sales 1% - 14% (7%) Impaired loans: Commercial real estate 1,250 - - 1,250 Sales comparison approach Adjustments for differences between comparable sales 7% - 35% (23%) Real estate mortgage - 1 to 4 family 458 - - 458 Sales comparison approach Adjustments for differences between comparable sales 5% - 14% (10%) Other real estate owned, that is carried at fair value less costs to sell was approximately $2.9 million at September 30, 2017 and consisted of $358 thousand of commercial real estate and $2.5 million of residential real estate properties. Valuation charges of $461 thousand and $823 thousand are included in earnings for the three and nine months ended September 30, 2017, respectively. Of the total impaired loans of $24.6 million at September 30, 2017, $651 thousand are collateral dependent and are carried at fair value measured on a non-recurring basis. Due to the sufficiency of charge offs taken on these loans and the adequacy of the underlying collateral, there were no specific valuation allowances for these loans at September 30, 2017. Gross charge offs related to residential impaired loans included in the table above were $15 thousand and $41 thousand for the three and nine months ended September 30, 2017, respectively. Other real estate owned, that is carried at fair value less costs to sell, was approximately $4.3 million at December 31, 2016 and consisted of $756 thousand of commercial real estate and $3.5 million of residential real estate properties. A valuation charge of $1.2 million is included in earnings for the year ended December 31, 2016. Of the total impaired loans of $24.0 million at December 31, 2016, $1.7 million are collateral dependent and are carried at fair value measured on a non-recurring basis. Due to the sufficiency of charge offs taken on these loans and the adequacy of the underlying collateral, there were no specific valuation allowances for these loans at December 31, 2016. Gross charge offs related to commercial impaired loans included in the table above were $482 thousand for the year ended December 31, 2016, while gross charge offs related to residential impaired loans included in the table above amounted to $226 thousand. In accordance with FASB Topic 825, Financial Instruments (dollars in thousands) Carrying Fair Value Measurements at Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 624,197 624,197 - - 624,197 Securities available for sale 580,430 35 580,395 - 580,430 Held to maturity securities 29,268 - 30,731 - 30,731 Federal Reserve Bank and Federal Home Loan Bank stock 8,779 N/A N/A N/A N/A Net loans 3,534,200 - - 3,541,135 3,541,135 Accrued interest receivable 10,813 56 2,473 8,284 10,813 Financial liabilities: Demand deposits 397,623 397,623 - - 397,623 Interest bearing deposits 3,767,739 2,691,853 1,069,906 - 3,761,759 Short-term borrowings 216,508 - 216,508 - 216,508 Accrued interest payable 470 67 402 - 470 (dollars in thousands) Carrying Fair Value Measurements at Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 707,274 707,274 - - 707,274 Securities available for sale 620,360 35 620,325 - 620,360 Held to maturity securities 45,490 - 47,526 - 47,526 Federal Reserve Bank and Federal Home Loan Bank stock 9,579 N/A N/A N/A N/A Net loans 3,386,696 - - 3,370,976 3,370,976 Accrued interest receivable 11,070 145 2,654 8,271 11,070 Financial liabilities: Demand deposits 377,755 377,755 - - 377,755 Interest bearing deposits 3,818,408 2,658,945 1,156,025 - 3,814,970 Short-term borrowings 209,406 - 209,406 - 209,406 Accrued interest payable 526 82 444 - 526 The specific estimation methods and assumptions used can have a substantial impact on the resulting fair values of financial instruments. The following is a brief summary of the significant methods and assumptions used in estimating fair values: Cash and Cash Equivalents The carrying values of these financial instruments approximate fair values and are classified as Level 1. Federal Reserve Bank and Federal Home Loan Bank stock It is not practical to determine the fair value of Federal Reserve Bank and Federal Home Loan Bank stock due to their restrictive nature. Securities Held to Maturity Similar to securities available for sale described previously, the fair value of securities held to maturity are determined utilizing an independent pricing service for identical assets or significantly similar securities. The pricing service uses a variety of techniques to arrive at fair value including market maker bids, quotes and pricing models. Inputs to the pricing models include recent trades, benchmark interest rates, spreads and actual and projected cash flows. This results in a Level 2 classification of the inputs for determining fair value. Interest and dividend income is recorded on the accrual method and included in the Consolidated Statements of Income in the respective investment class under total interest and dividend income. The Company does not have any securities that would be designated as Level 3. Loans The fair values of all loans are estimated using discounted cash flow analyses with discount rates equal to the interest rates currently being offered for loans with similar terms to borrowers of similar credit quality resulting in a Level 3 classification. Impaired loans are valued at the lower of cost or fair value as described previously. The methods utilized to estimate the fair value of loans do not necessarily represent an exit price. Deposit Liabilities The fair values disclosed for noninterest bearing demand deposits, interest bearing checking accounts, savings accounts, and money market accounts are, by definition, equal to the amount payable on demand at the balance sheet date resulting in a Level 1 classification. The carrying value of all variable rate certificates of deposit approximates fair value resulting in a Level 2 classification. The fair value of fixed rate certificates of deposit is estimated using discounted cash flow analyses with discount rates equal to the interest rates currently being offered on certificates of similar size and remaining maturity resulting in a Level 2 classification. Accrued Interest Receivable/Payable The carrying amounts of accrued interest approximate fair value resulting in a Level 1, Level 2 or Level 3 classification consistent with the asset or liability that they are associated with. Short-Term Borrowings and Other Financial Instruments The fair value of all short-term borrowings, and other financial instruments approximates the carrying value resulting in a Level 2 classification. Financial Instruments with Off-Balance Sheet Risk The Company is a party to financial instruments with off-balance sheet risk. Such financial instruments consist of commitments to extend financing and standby letters of credit. If the commitments are exercised by the prospective borrowers, these financial instruments will become interest earning assets of the Company. If the commitments expire, the Company retains any fees paid by the prospective borrower. The fair value of commitments is estimated based upon fees currently charged to enter into similar agreements, taking into consideration the remaining terms of the agreements and the present creditworthiness of the borrower. For fixed rate commitments, the fair value estimation takes into consideration an interest rate risk factor. The fair value of these off-balance sheet items approximates the recorded amounts of the related fees, which are considered to be immaterial. The Company does not engage in activities involving interest rate swaps, forward placement contracts, or any other instruments commonly referred to as derivatives.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income (Loss)	(7) Accumulated Other Comprehensive Income (Loss) The following is a summary of the accumulated other comprehensive income (loss) balances, net of tax: Three months ended 9/30/17 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ (4,049 ) 562 - 562 (3,487 ) Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax 456 - (29 ) (29 ) 427 Accumulated other comprehensive income (loss), net of tax (3,593 ) 562 (29 ) 533 (3,060 ) Three months ended 9/30/2016 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ 2,667 (75 ) - (75 ) 2,592 Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax (272 ) - 8 8 (264 ) Accumulated other comprehensive income (loss), net of tax 2,395 (75 ) 8 (67 ) 2,328 Nine months ended 9/30/17 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ (6,762 ) 3,275 - 3,275 (3,487 ) Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax 511 - (84 ) (84 ) 427 Accumulated other comprehensive income (loss), net of tax (6,251 ) 3,275 (84 ) 3,191 (3,060 ) Nine months ended 9/30/16 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ (4,492 ) 7,483 (401 ) 7,084 2,592 Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax (289 ) - 25 25 (264 ) Accumulated other comprehensive income (loss), net of tax (4,781 ) 7,483 (376 ) 7,109 2,328 The following represents the reclassifications out of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 and 2016: (dollars in thousands) Three months ended Nine months ended 2017 2016 2017 2016 Affected Line Item in Statements Net unrealized holding gain on securities available for sale Realized gain on securities transactions $ - - $ - 668 Net gain on securities transactions Income tax effect - - - (267 ) Income taxes Net of tax - - - 401 Amortization of pension and postretirement benefit items Amortization of net actuarial gain 72 8 208 25 Salaries and employee benefits Amortization of prior service cost (23 ) (22 ) (68 ) (67 ) Salaries and employee benefits Income tax effect (20 ) 6 (56 ) 17 Income taxes Net of tax 29 (8 ) 84 (25 ) Total reclassifications, net of tax $ 29 (8 ) $ 84 376

Agreement with the Office of th

Agreement with the Office of the Comptroller of the Currency	9 Months Ended
	Sep. 30, 2017
Agreement with the Office of the Comptroller of the Currency [Abstract]
Agreement with the Office of the Comptroller of the Currency	(8) Agreement with the Office of the Comptroller of the Currency On July 21, 2015 Trustco Bank (the “Bank”), the wholly owned subsidiary of the Company, entered into a formal agreement (the “Agreement”) with the Comptroller of the Currency of the United States (the “OCC”). The Agreement relates to the findings of the OCC following an examination of the Bank. Since the completion of the examination and entry into the Agreement, the Bank believes it has been working diligently to address the findings of the examination and to develop and implement appropriate formal action plans. The Agreement requires the Bank to take various actions, within prescribed time frames, with respect to certain areas of the Bank. These include, among others, (i) establishment of a committee of at least three Directors to monitor and coordinate the Bank’s response to the Agreement; (ii) adoption of compliance plans to respond to the Agreement with the assistance of an independent qualified consultant; (iii) evaluation and implementation of improvements in corporate governance with the assistance of an independent qualified consultant; (iv) evaluation and implementation of improvements in internal audit; (v) development of a strategic plan; (vi) development of a revised capital plan consistent with the strategic plan; (vii) development and implementation of improvements to the Bank’s loan review system; and (viii) such other necessary steps to address the issues and questions noted by the OCC in the Agreement.

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2017
New Accounting Pronouncements [Abstract]
New Accounting Pronouncements	(9) New Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” which implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. In July 2015, FASB deferred the effective date of the ASU by one year which means ASU 2014-09 will be effective for the Company on January 1, 2018. In addition, the FASB has begun to issue targeted updates to clarify specific implementation issues of ASU 2014-09. These updates include ASU No. 2016-08 - Principal versus Agent Considerations (Reporting Revenue Gross versus Net), ASU No. 2016-10 - Identifying Performance Obligations and Licensing and ASU No. 2016-12 - Narrow-Scope Improvements and Practical Expedients. The Company is in process of evaluating disclosure impact. Based on the Company’s preliminary evaluation, the ASU does not have a material impact on the Company’s financial position or the results of operations. The Company is in process of evaluating disclosure impact. In January 2016, the FASB issued ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” which amended existing guidance to improve accounting standards for financial instruments including clarification and simplification of accounting and disclosure requirements and the requirement for public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. These amendments are effective for public business entities for annual periods and interim periods within those annual periods beginning after December 15, 2017. The ASU is not expected to significantly impact the Company’s consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, “Leases” which amended existing guidance to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. These amendments are effective for public business entities for annual periods and interim periods within those annual periods beginning after December 15, 2018. It is expected that assets and liabilities will increase based on the present value of remaining lease payments for leases in place at the adoption date which will impact the financial position and capital ratios of the Company. As of December 31, 2016, the Company has approximately $69.7 million in minimum lease payments for existing operating leases of branch locations with varying expiration dates from 2017 and after. The Company does not expect the ASU to have a material impact on the Company’s results of operations. In June 2016, the FASB released ASU No. 2016-13, “Financial Instruments – Credit Losses” which amended existing guidance to replace current generally accepted accounting principles used to measure a reporting entity’s credit losses. The main objective of this update is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. To achieve this objective, the amendments in this update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. These amendments are effective for public business entities for annual periods and interim periods within those annual periods beginning after December 15, 2019. The ASU represents a significant departure from current GAAP and the Company is evaluating the impact of the ASU on its consolidated financial statements. The Company has established a roadmap for implementation and is currently evaluating vendor solutions that will assist in implementing required changes to loan loss estimation model. In January 2017, the FASB issued ASU No. 2017-04, “Intangibles-Goodwill and Other (Topic 350)” which simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. In computing the implied fair value of goodwill under Step 2, an entity had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities (including unrecognized assets and liabilities) following the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination. Instead, under the amendments in this ASU, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The Board also eliminated the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. Therefore, the same impairment assessment applies to all reporting units. An entity is required to disclose the amount of goodwill allocated to each reporting unit with a zero or negative carrying amount of net assets. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. A public business entity that is a U.S. Securities and Exchange Commission (SEC) filer should adopt the amendments in this ASU for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The ASU is not expected to significantly impact the Company’s consolidated financial statements. In March 2017, the FASB issued ASU No. 2017 -0 . In March 2017, the FASB issued ASU No. 2017 -0 -0 In May 2017, the FASB issued ASU No. 2017-09, “Compensation - Stock Compensation – Scope of Modification Accounting (Topic 718)”. The amendments in this ASU clarifies the application of the guidance in Topic 718, Compensation – Stock Compensation, by providing guidance about which changes in terms or conditions of a share-based payment award require and entity to apply modification accounting. An entity should account for the effects of a modification unless all the following are met: 1) The fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the modified award is the same as the fair value (or calculated value or intrinsic value, if such an alternative measurement method is used) of the original award immediately before the original award is modified. If the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification; 2) The vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified; 3) The classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The current disclosure requirements in Topic 718 apply regardless of whether an entity is required to apply modification accounting under the amendments in this ASU. The amendments in this Update are effective for all entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. The ASU is not expected to significantly impact the Company’s consolidated financial statements.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Reconciliation of component parts of earnings per share	A reconciliation of the component parts of earnings per share for the three and nine months ended September 30, 2017 and 2016 is as follows: (in thousands, except per share data) For the three months ended September 30: For the nine months ended September 30: 2017 2016 2017 2016 Net income $ 12,596 10,930 $ 35,783 31,803 Weighted average common shares 96,102 95,603 95,997 95,486 Stock Options 103 119 94 86 Weighted average common shares including potential dilutive shares 96,205 95,722 96,091 95,572 Basic EPS $ 0.131 0.114 $ 0.373 0.333 Diluted EPS $ 0.131 0.114 $ 0.372 0.333

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2017
Benefit Plans [Abstract]
Components of Company's net periodic cost	The table below outlines the components of the Company’s net periodic benefit recognized during the three and nine months ended September 30, 2017 and 2016 for its pension and other postretirement benefit plans: For the three months ended September 30, Pension Benefits Other Postretirement Benefits (dollars in thousands) 2017 2016 2017 2016 Service cost $ 11 15 26 32 Interest cost 326 343 54 61 Expected return on plan assets (686 ) (669 ) (190 ) (180 ) Amortization of net loss (gain) 17 46 (89 ) (54 ) Amortization of prior service cost - - 23 22 Net periodic benefit $ (332 ) (265 ) (176 ) (119 ) For the nine months ended September 30, Pension Benefits Other Postretirement Benefits (dollars in thousands) 2017 2016 2017 2016 Service cost $ 33 46 77 96 Interest cost 977 1,029 164 184 Expected return on plan assets (2,058 ) (1,994 ) (571 ) (540 ) Amortization of net loss (gain) 50 138 (258 ) (163 ) Amortization of prior service cost - - 68 67 Net periodic benefit $ (998 ) (781 ) (520 ) (356 )

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Investment Securities [Abstract]
Amortized cost and fair value of the securities available for sale	The amortized cost and fair value of the securities available for sale are as follows: (dollars in thousands) September 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government sponsored enterprises $ 125,024 93 1,459 123,658 State and political subdivisions 521 12 - 533 Corporate bonds 40,442 - 61 40,381 Mortgage backed securities and collateralized mortgage obligations - residential 338,519 164 3,152 335,531 Small Business Administration- guaranteed participation securities 71,169 - 1,351 69,818 Mortgage backed securities and collateralized mortgage obligations - commercial 9,875 - 51 9,824 Other 650 - - 650 Total debt securities 586,200 269 6,074 580,395 Equity securities 35 - - 35 Total securities available for sale $ 586,235 269 6,074 580,430 (dollars in thousands) December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. government sponsored enterprises $ 119,887 - 2,621 117,266 State and political subdivisions 873 13 - 886 Mortgage backed securities and collateralized mortgage obligations - residential 378,068 123 5,883 372,308 Corporate bonds 40,956 - 251 40,705 Small Business Administration- guaranteed participation securities 81,026 - 2,527 78,499 Mortgage backed securities and collateralized mortgage obligations - commercial 10,130 - 119 10,011 Other 650 - - 650 Total debt securities 631,590 136 11,401 620,325 Equity securities 35 - - 35 Total securities available for sale $ 631,625 136 11,401 620,360
Investment [Line Items]
Proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses	The proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses from sales and calls during the three and nine months ended September 30, 2017 and 2016 are as follows: (dollars in thousands) Three months ended September 30, 2017 2016 Proceeds from sales $ - - Proceeds from calls 35,554 70,762 Gross realized gains - - Gross realized losses - - (dollars in thousands) Nine months ended September 30, 2017 2016 Proceeds from sales $ - 44,829 Proceeds from calls 109,123 160,483 Gross realized gains - 668 Gross realized losses - -
Amortized cost and fair value of the held to maturity securities	The amortized cost and fair value of the held to maturity securities are as follows: (dollars in thousands) September 30, 2017 Amortized Cost Gross Unrecognized Gains Gross Unrecognized Losses Fair Value Mortgage backed securities and collateralized mortgage obligations - residential $ 29,268 1,463 - 30,731 Total held to maturity $ 29,268 1,463 - 30,731 (dollars in thousands) December 31, 2016 Amortized Gross Gross Fair Mortgage backed securities and collateralized mortgage obligations - residential $ 35,500 1,736 - 37,236 Corporate bonds 9,990 300 - 10,290 Total held to maturity $ 45,490 2,036 - 47,526
Securities Available for Sale [Member]
Investment [Line Items]
Debt securities based on the securities contractual maturity	The following table distributes the debt securities included in the available for sale portfolio as of September 30, 2017, based on the securities’ final maturity. Actual maturities may differ because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty. Securities not due at a single maturity date are presented separately: (dollars in thousands) Amortized Cost Fair Value Due in one year or less $ 50,331 50,283 Due in one year through five years 106,105 104,749 Due after five years through ten years 10,201 10,190 Due after ten years - - Mortgage backed securities and collateralized mortgage obligations - residential 338,519 335,531 Small Business Administration- guaranteed participation securities 71,169 69,818 Mortgage backed securities and collateralized mortgage obligations - commercial 9,875 9,824 $ 586,200 580,395
Gross unrealized losses on investment securities and the related fair values aggregated by the length of time that individual securities have been in an unrealized loss position	Gross unrealized losses on securities available for sale and the related fair values aggregated by the length of time that individual securities have been in an unrealized loss position, were as follows: (dollars in thousands) September 30, 2017 Less than 12 months 12 months or more Total Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss U.S. government sponsored enterprises $ 24,887 113 88,544 1,346 113,431 1,459 Corporate bonds - - 40,381 61 40,381 61 Mortgage backed securities and collateralized mortgage obligations - residential 228,925 1,972 82,423 1,180 311,348 3,152 Small Business Administration- guaranteed participation securities 20,070 270 49,748 1,081 69,818 1,351 Mortgage backed securities and collateralized mortgage obligations - commercial - - 9,824 51 9,824 51 Total $ 273,882 2,355 270,920 3,719 544,802 6,074 (dollars in thousands) December 31, 2016 Less than 12 months 12 months or more Total Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss Fair Value Gross Unreal. Loss U.S. government sponsored enterprises $ 102,266 2,621 - - 102,266 2,621 Corporate bonds 40,705 251 - - 40,705 251 Mortgage backed securities and collateralized mortgage obligations - residential 359,622 5,766 4,713 117 364,335 5,883 Small Business Administration- guaranteed participation securities 64,560 1,960 13,940 567 78,500 2,527 Mortgage backed securities and collateralized mortgage obligations - commercial 10,011 119 - - 10,011 119 Total $ 577,164 10,717 18,653 684 595,817 11,401
Held to Maturity Securities [Member]
Investment [Line Items]
Debt securities based on the securities contractual maturity	The following table distributes the debt securities included in the held to maturity portfolio as of September 30, 2017, based on the securities’ final maturity. Actual maturities may differ because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty. Securities not due at a single maturity date are presented separately: (dollars in thousands) Amortized Cost Fair Value Mortgage backed securities and collateralized mortgage obligations - residential 29,268 30,731 $ 29,268 30,731

Loans and Allowance for Loan 21

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2017
Loans and Allowance for Loan Losses [Abstract]
Recorded investment in loans by loan class	The following table presents the recorded investment in loans by loan class: September 30, 2017 (dollars in thousands) New York and other states* Florida Total Commercial: Commercial real estate $ 152,228 12,980 165,208 Other 21,754 319 22,073 Real estate mortgage - 1 to 4 family: First mortgages 2,251,152 742,697 2,993,849 Home equity loans 64,556 12,565 77,121 Home equity lines of credit 267,143 44,610 311,753 Installment 6,796 1,482 8,278 Total loans, net $ 2,763,629 814,653 3,578,282 Less: Allowance for loan losses 44,082 Net loans $ 3,534,200 December 31, 2016 (dollars in thousands) New York and other states* Florida Total Commercial: Commercial real estate $ 151,366 12,243 163,609 Other 27,539 46 27,585 Real estate mortgage - 1 to 4 family: First mortgages 2,158,904 665,183 2,824,087 Home equity loans 60,892 10,754 71,646 Home equity lines of credit 286,586 48,255 334,841 Installment 7,048 1,770 8,818 Total loans, net $ 2,692,335 738,251 3,430,586 Less: Allowance for loan losses 43,890 Net loans $ 3,386,696 *Includes New York, New Jersey, Vermont and Massachusetts
Recorded investment in non-accrual loans by loan class	The following tables present the recorded investment in non-accrual loans by loan class: September 30, 2017 (dollars in thousands) New York and other states Florida Total Loans in non-accrual status: Commercial: Commercial real estate $ 1,596 - 1,596 Other 100 - 100 Real estate mortgage - 1 to 4 family: First mortgages 17,048 1,764 18,812 Home equity loans 35 - 35 Home equity lines of credit 3,843 131 3,974 Installment 30 - 30 Total non-accrual loans 22,652 1,895 24,547 Restructured real estate mortgages - 1 to 4 family 40 - 40 Total nonperforming loans $ 22,692 1,895 24,587 December 31, 2016 (dollars in thousands) New York and Florida Total Loans in non-accrual status: Commercial: Commercial real estate $ 1,843 - 1,843 Other - - - Real estate mortgage - 1 to 4 family: First mortgages 17,727 1,659 19,386 Home equity loans 95 - 95 Home equity lines of credit 3,376 270 3,646 Installment 48 - 48 Total non-accrual loans 23,089 1,929 25,018 Restructured real estate mortgages - 1 to 4 family 42 - 42 Total nonperforming loans $ 23,131 1,929 25,060
Aging of the recorded investment in past due loans by loan class and by region	The following tables present the aging of the recorded investment in past due loans by loan class and by region as of September 30, 2017 and December 31, 2016: New York and other states: September 30, 2017 (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ - - 1,481 1,481 150,747 152,228 Other - - 100 100 21,654 21,754 Real estate mortgage - 1 to 4 family: First mortgages 4,972 1,973 9,560 16,505 2,234,647 2,251,152 Home equity loans 70 - 3 73 64,483 64,556 Home equity lines of credit 337 167 2,235 2,739 264,404 267,143 Installment 39 29 10 78 6,718 6,796 Total $ 5,418 2,169 13,389 20,976 2,742,653 2,763,629 Florida: (dollars in thousands) 30-59 60-89 Days 90+ Days Total 30+ days Current Total Commercial: Commercial real estate $ - - - - 12,980 12,980 Other - - - - 319 319 Real estate mortgage - 1 to 4 family: First mortgages 845 291 1,323 2,459 740,238 742,697 Home equity loans - - - - 12,565 12,565 Home equity lines of credit - - - - 44,610 44,610 Installment - - - - 1,482 1,482 Total $ 845 291 1,323 2,459 812,194 814,653 Total: (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ - - 1,481 1,481 163,727 165,208 Other - - 100 100 21,973 22,073 Real estate mortgage - 1 to 4 family: First mortgages 5,817 2,264 10,883 18,964 2,974,885 2,993,849 Home equity loans 70 - 3 73 77,048 77,121 Home equity lines of credit 337 167 2,235 2,739 309,014 311,753 Installment 39 29 10 78 8,200 8,278 Total $ 6,263 2,460 14,712 23,435 3,554,847 3,578,282 New York and other states: December 31, 2016 (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ 50 43 1,706 1,799 149,567 151,366 Other - - - - 27,539 27,539 Real estate mortgage - 1 to 4 family: First mortgages 6,379 2,924 9,643 18,946 2,139,958 2,158,904 Home equity loans 50 3 74 127 60,765 60,892 Home equity lines of credit 685 111 1,839 2,635 283,951 286,586 Installment 34 32 15 81 6,967 7,048 Total $ 7,198 3,113 13,277 23,588 2,668,747 2,692,335 Florida: (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ - - - - 12,243 12,243 Other - - - - 46 46 Real estate mortgage - 1 to 4 family: First mortgages 1,942 69 1,255 3,266 661,917 665,183 Home equity loans 19 - - 19 10,735 10,754 Home equity lines of credit - - 156 156 48,099 48,255 Installment 30 6 - 36 1,734 1,770 Total $ 1,991 75 1,411 3,477 734,774 738,251 Total: (dollars in thousands) 30-59 60-89 90+ Total Current Total Commercial: Commercial real estate $ 50 43 1,706 1,799 161,810 163,609 Other - - - - 27,585 27,585 Real estate mortgage - 1 to 4 family: First mortgages 8,321 2,993 10,898 22,212 2,801,875 2,824,087 Home equity loans 69 3 74 146 71,500 71,646 Home equity lines of credit 685 111 1,995 2,791 332,050 334,841 Installment 64 38 15 117 8,701 8,818 Total $ 9,189 3,188 14,688 27,065 3,403,521 3,430,586
Activity in the allowance for loan losses by portfolio segment	Activity in the allowance for loan losses by portfolio segment is summarized as follows: (dollars in thousands) For the three months ended September 30, 2017 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 4,596 38,871 695 44,162 Loans charged off: New York and other states* - 747 65 812 Florida - 31 4 35 Total loan chargeoffs - 778 69 847 Recoveries of loans previously charged off: New York and other states* - 137 8 145 Florida - 72 - 72 Total recoveries - 209 8 217 Net loans charged off - 569 61 630 Provision for loan losses 24 434 92 550 Balance at end of period $ 4,620 38,736 726 44,082 (dollars in thousands) For the three months ended September 30, 2016 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 5,046 38,589 429 44,064 Loans charged off: New York and other states* 356 549 57 962 Florida - 2 3 5 Total loan chargeoffs 356 551 60 967 Recoveries of loans previously charged off: New York and other states* 3 78 20 101 Florida - 2 - 2 Total recoveries 3 80 20 103 Net loans charged off 353 471 40 864 Provision (credit) for loan losses 505 (51 ) 296 750 Balance at end of period $ 5,198 38,067 685 43,950 (dollars in thousands) For the nine months ended September 30, 2017 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 4,929 38,231 730 43,890 Loans charged off: New York and other states* 72 1,699 146 1,917 Florida - 167 19 186 Total loan chargeoffs 72 1,866 165 2,103 Recoveries of loans previously charged off: New York and other states* 8 494 21 523 Florida - 72 - 72 Total recoveries 8 566 21 595 Net loans charged off 64 1,300 144 1,508 Provision for loan losses (245 ) 1,805 140 1,700 Balance at end of period $ 4,620 38,736 726 44,082 (dollars in thousands) For the nine months ended September 30, 2016 Commercial Real Estate Mortgage- 1 to 4 Family Installment Total Balance at beginning of period $ 4,491 39,753 518 44,762 Loans charged off: New York and other states* 688 2,528 230 3,446 Florida - 103 20 123 Total loan chargeoffs 688 2,631 250 3,569 Recoveries of loans previously charged off: New York and other states* 44 313 46 403 Florida - 4 - 4 Total recoveries 44 317 46 407 Net loans charged off 644 2,314 204 3,162 Provision for loan losses 1,351 628 371 2,350 Balance at end of period $ 5,198 38,067 685 43,950
Allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method	September 30, 2017 (dollars in thousands) Commercial Loans 1-to-4 Family Installment Loans Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ - - - - Collectively evaluated for impairment 4,620 38,736 726 44,082 Total ending allowance balance $ 4,620 38,736 726 44,082 Loans: Individually evaluated for impairment $ 2,969 21,585 - 24,554 Collectively evaluated for impairment 184,312 3,361,138 8,278 3,553,728 Total ending loans balance $ 187,281 3,382,723 8,278 3,578,282 December 31, 2016 (dollars in thousands) Commercial Loans 1-to-4 Family Installment Loans Total Allowance for loan losses: Ending allowance balance attributable to loans: Individually evaluated for impairment $ - - - - Collectively evaluated for impairment 4,929 38,231 730 43,890 Total ending allowance balance $ 4,929 38,231 730 43,890 Loans: Individually evaluated for impairment $ 2,418 21,607 - 24,025 Collectively evaluated for impairment 188,776 3,208,967 8,818 3,406,561 Total ending loans balance $ 191,194 3,230,574 8,818 3,430,586
Impaired loans by loan class	The following table presents impaired loans by loan class: New York and other states: September 30, 2017 (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ 2,869 3,916 - 2,879 Other 100 100 - 100 Real estate mortgage - 1 to 4 family: First mortgages 16,043 16,351 - 16,715 Home equity loans 252 272 - 265 Home equity lines of credit 2,330 2,524 - 2,128 Total $ 21,594 23,163 - 22,087 Florida: (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ - - - - Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 2,335 2,441 - 2,217 Home equity loans 90 90 - 92 Home equity lines of credit 535 535 - 568 Total $ 2,960 3,066 - 2,877 Total: (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ 2,869 3,916 - 2,879 Other 100 100 - 100 Real estate mortgage - 1 to 4 family: First mortgages 18,378 18,792 - 18,932 Home equity loans 342 362 - 358 Home equity lines of credit 2,865 3,059 - 2,696 Total $ 24,554 26,229 - 24,964 New York and other states: December 31, 2016 (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ 2,418 3,470 - 2,214 Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 16,675 17,439 - 15,665 Home equity loans 269 305 - 251 Home equity lines of credit 1,999 2,160 - 1,806 Total $ 21,361 23,374 - 19,936 Florida: (dollars in thousands) Recorded Investment Unpaid Balance Related Allowance Average Investment Commercial: Commercial real estate $ - - - - Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 2,009 2,100 - 1,800 Home equity loans 94 94 - 81 Home equity lines of credit 561 633 - 591 Total $ 2,664 2,827 - 2,472 Total: (dollars in thousands) Recorded Unpaid Related Average Commercial: Commercial real estate $ 2,418 3,470 - 2,214 Other - - - - Real estate mortgage - 1 to 4 family: First mortgages 18,684 19,539 - 17,465 Home equity loans 363 399 - 332 Home equity lines of credit 2,560 2,793 - 2,397 Total $ 24,025 26,201 - 22,408
Modified loans by class that were determined to be TDR's	The following table presents, by class, loans that were modified as TDR’s: Three months ended 9/30/2017 Three months ended 9/30/2016 New York and other states*: Pre-Modification Post-Modification Pre-Modification Post-Modification (dollars in thousands) Number of Outstanding Outstanding Number of Outstanding Outstanding Commercial: Commercial real estate - $ - - - $ - - Real estate mortgage - 1 to 4 family: First mortgages 7 $ 941 $ 941 7 $ 655 $ 655 Home equity loans - - - 1 44 44 Home equity lines of credit 3 296 296 2 183 183 Total 10 $ 1,237 $ 1,237 10 $ 882 $ 882 Florida: (dollars in thousands) Number of Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Commercial: Commercial real estate - $ - - - $ - - Real estate mortgage - 1 to 4 family: First mortgages 2 $ 251 $ 251 - $ - $ - Home equity loans - - - - - - Home equity lines of credit - - - - - - Total 2 $ 251 $ 251 - $ - $ - Nine months ended 9/30/2017 Nine months ended 9/30/2016 New York and other states*: Pre-Modification Post-Modification Pre-Modification Post-Modification (dollars in thousands) Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Number of Contracts Outstanding Recorded Investment Outstanding Recorded Investment Commercial: Commercial real estate 3 $ 747 $ 747 - $ - $ - Real estate mortgage - 1 to 4 family: First mortgages 25 $ 3,986 3,986 27 $ 2,383 2,383 Home equity loans 1 13 13 1 44 44 Home equity lines of credit 8 457 457 10 316 316 Total 37 $ 5,203 $ 5,203 38 $ 2,743 $ 2,743 Florida: (dollars in thousands) Number of Contracts Pre-Modification Recorded Investment Post-Modification Recorded Investment Number of Contracts Pre-Modification Recorded Investment Post-Modification Recorded Investment Commercial: Commercial real estate - $ - - - $ - - Real estate mortgage - 1 to 4 family: First mortgages 7 $ 718 $ 718 2 $ 408 $ 408 Home equity loans - - - 1 45 45 Home equity lines of credit 1 70 70 1 6 6 Total 8 $ 788 $ 788 4 $ 459 $ 459
Loans by class modified as TDR's for which there was a payment default	The following table presents, by class, TDR’s that defaulted during the three and nine months ended September 30, 2017 and 2016 which had been modified within the last twelve months: Three months ended 9/30/2017 Three months ended 9/30/2016 New York and other states*: Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages 2 $ 236 - $ - Home equity lines of credit - - - - Total 2 $ 236 - $ - Florida: (dollars in thousands) Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages - $ - - $ - Total - $ - - $ - Nine months ended 9/30/2017 Nine months ended 9/30/2016 New York and other states*: Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages 2 $ 236 1 $ 107 Home equity loans - - - - Home equity lines of credit 1 3 - - Total 3 $ 239 1 $ 107 Florida: (dollars in thousands) Number of Recorded Number of Recorded Real estate mortgage - 1 to 4 family: First mortgages 1 $ 77 - $ - Home equity lines of credit 1 $ 70 1 $ 46 Total 2 $ 147 1 $ 46
Risk category of loans by class of loans	As of September 30, 2017 and December 31, 2016, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows: September 30, 2017 New York and other states: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 142,390 9,838 152,228 Other 20,154 1,600 21,754 $ 162,544 11,438 173,982 Florida: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 12,980 - 12,980 Other 319 - 319 $ 13,299 - 13,299 Total: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 155,370 9,838 165,208 Other 20,473 1,600 22,073 $ 175,843 11,438 187,281 December 31, 2016 New York and other states: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 136,676 14,690 151,366 Other 25,442 2,097 27,539 $ 162,118 16,787 178,905 Florida: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 12,243 - 12,243 Other 46 - 46 $ 12,289 - 12,289 Total: (dollars in thousands) Pass Classified Total Commercial: Commercial real estate $ 148,919 14,690 163,609 Other 25,488 2,097 27,585 $ 174,407 16,787 191,194

Fair Value of Financial Instr22

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value of Financial Instruments [Abstract]
Assets and liabilities measured at fair value on a recurring basis	Assets and liabilities measured at fair value under ASC 820 on a recurring basis are summarized below: Fair Value Measurements at Carrying Quoted Prices in Significant Significant (dollars in thousands) Securities available for sale: U.S. government sponsored enterprises $ 123,658 $ - $ 123,658 $ - State and political subdivisions 533 - 533 - Corporate bonds 40,381 - 40,381 - Mortgage backed securities and collateralized mortgage obligations - residential 335,531 - 335,531 - Small Business Administration- guaranteed participation securities 69,818 - 69,818 - Mortgage backed securities and collateralized mortgage obligations - commercial 9,824 - 9,824 - Other securities 685 35 650 - Total securities available for sale $ 580,430 $ 35 $ 580,395 $ - Fair Value Measurements at Carrying Quoted Prices in Significant Significant (dollars in thousands) Securities available for sale: U.S. government sponsored enterprises $ 117,266 $ - $ 117,266 $ - State and political subdivisions 886 - 886 - Mortgage backed securities and collateralized mortgage obligations - residential 372,308 - 372,308 - Corporate bonds 40,705 - 40,705 - Small Business Administration- guaranteed participation securities 78,499 - 78,499 - Mortgage backed securities and collateralized mortgage obligations - commercial 10,011 - 10,011 - Other securities 685 35 650 - Total securities available for sale $ 620,360 $ 35 $ 620,325 $ -
Assets measured at fair value on a non-recurring basis	Assets measured at fair value on a non-recurring basis are summarized below: Fair Value Measurements at Carrying Quoted Prices in Significant Significant Valuation technique Unobservable inputs Range (Weighted Average) (dollars in thousands) Other real estate owned $ 2,879 $ - $ - $ 2,879 Sales comparison approach Adjustments for differences between comparable sales 2% - 10% (4%) Impaired loans: Real estate mortgage - 1 to 4 family 651 - - 651 Sales comparison approach Adjustments for differences between comparable sales 2% - 5% (4%) Fair Value Measurements at Carrying Quoted Prices in Significant Significant Valuation technique Unobservable inputs Range (Weighted Average) (dollars in thousands) Other real estate owned $ 4,268 $ - $ - $ 4,268 Sales comparison approach Adjustments for differences between comparable sales 1% - 14% (7%) Impaired loans: Commercial real estate 1,250 - - 1,250 Sales comparison approach Adjustments for differences between comparable sales 7% - 35% (23%) Real estate mortgage - 1 to 4 family 458 - - 458 Sales comparison approach Adjustments for differences between comparable sales 5% - 14% (10%)
Carrying amounts and estimated fair values of financial instruments	In accordance with FASB Topic 825, Financial Instruments (dollars in thousands) Carrying Fair Value Measurements at Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 624,197 624,197 - - 624,197 Securities available for sale 580,430 35 580,395 - 580,430 Held to maturity securities 29,268 - 30,731 - 30,731 Federal Reserve Bank and Federal Home Loan Bank stock 8,779 N/A N/A N/A N/A Net loans 3,534,200 - - 3,541,135 3,541,135 Accrued interest receivable 10,813 56 2,473 8,284 10,813 Financial liabilities: Demand deposits 397,623 397,623 - - 397,623 Interest bearing deposits 3,767,739 2,691,853 1,069,906 - 3,761,759 Short-term borrowings 216,508 - 216,508 - 216,508 Accrued interest payable 470 67 402 - 470 (dollars in thousands) Carrying Fair Value Measurements at Value Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 707,274 707,274 - - 707,274 Securities available for sale 620,360 35 620,325 - 620,360 Held to maturity securities 45,490 - 47,526 - 47,526 Federal Reserve Bank and Federal Home Loan Bank stock 9,579 N/A N/A N/A N/A Net loans 3,386,696 - - 3,370,976 3,370,976 Accrued interest receivable 11,070 145 2,654 8,271 11,070 Financial liabilities: Demand deposits 377,755 377,755 - - 377,755 Interest bearing deposits 3,818,408 2,658,945 1,156,025 - 3,814,970 Short-term borrowings 209,406 - 209,406 - 209,406 Accrued interest payable 526 82 444 - 526

Accumulated Other Comprehensi23

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated other comprehensive (loss) income, net of tax	The following is a summary of the accumulated other comprehensive income (loss) balances, net of tax: Three months ended 9/30/17 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ (4,049 ) 562 - 562 (3,487 ) Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax 456 - (29 ) (29 ) 427 Accumulated other comprehensive income (loss), net of tax (3,593 ) 562 (29 ) 533 (3,060 ) Three months ended 9/30/2016 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ 2,667 (75 ) - (75 ) 2,592 Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax (272 ) - 8 8 (264 ) Accumulated other comprehensive income (loss), net of tax 2,395 (75 ) 8 (67 ) 2,328 Nine months ended 9/30/17 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ (6,762 ) 3,275 - 3,275 (3,487 ) Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax 511 - (84 ) (84 ) 427 Accumulated other comprehensive income (loss), net of tax (6,251 ) 3,275 (84 ) 3,191 (3,060 ) Nine months ended 9/30/16 (dollars in thousands) Balance at Other Amount Other Balance at Net unrealized holding gain (loss) on securities available for sale, net of tax $ (4,492 ) 7,483 (401 ) 7,084 2,592 Net change in net actuarial gain and prior service cost on pension and postretirement benefit plans, net of tax (289 ) - 25 25 (264 ) Accumulated other comprehensive income (loss), net of tax (4,781 ) 7,483 (376 ) 7,109 2,328
Reclassifications out of accumulated other comprehensive income (loss)	The following represents the reclassifications out of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 and 2016: (dollars in thousands) Three months ended Nine months ended 2017 2016 2017 2016 Affected Line Item in Statements Net unrealized holding gain on securities available for sale Realized gain on securities transactions $ - - $ - 668 Net gain on securities transactions Income tax effect - - - (267 ) Income taxes Net of tax - - - 401 Amortization of pension and postretirement benefit items Amortization of net actuarial gain 72 8 208 25 Salaries and employee benefits Amortization of prior service cost (23 ) (22 ) (68 ) (67 ) Salaries and employee benefits Income tax effect (20 ) 6 (56 ) 17 Income taxes Net of tax 29 (8 ) 84 (25 ) Total reclassifications, net of tax $ 29 (8 ) $ 84 376

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of the component parts of earnings per share [Abstract]
Net income	$ 12,596	$ 10,930	$ 35,783	$ 31,803
Weighted average common shares (in shares)	96,102	95,603	95,997	95,486
Stock Options (in shares)	103	119	94	86
Weighted average common shares including potential dilutive shares (in shares)	96,205	95,722	96,091	95,572
Basic EPS (in dollars per share)	$ 0.131	$ 0.114	$ 0.373	$ 0.333
Diluted EPS (in dollars per share)	$ 0.131	$ 0.114	$ 0.372	$ 0.333
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of antidilutive stock options excluded from diluted earnings per share (in shares)	995	1,600	1,400	1,600

Benefit Plans (Details)

Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Components of net periodic benefit cost [Abstract]
Contribution made to pension and postretirement plans			$ 0
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 11	$ 15	33	$ 46
Interest cost	326	343	977	1,029
Expected return on plan assets	(686)	(669)	(2,058)	(1,994)
Amortization of net loss (gain)	17	46	50	138
Amortization of prior service cost	0	0	0	0
Net periodic benefit	(332)	(265)	(998)	(781)
Other Postretirement Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	26	32	77	96
Interest cost	54	61	164	184
Expected return on plan assets	(190)	(180)	(571)	(540)
Amortization of net loss (gain)	(89)	(54)	(258)	(163)
Amortization of prior service cost	23	22	68	67
Net periodic benefit	$ (176)	$ (119)	$ (520)	$ (356)

Investment Securities, Availabl

Investment Securities, Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	$ 586,235	$ 631,625
Gross Unrealized Gains	269	136
Gross Unrealized Losses	6,074	11,401
Fair Value	580,430	620,360
U. S. Government Sponsored Enterprises [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	125,024	119,887
Gross Unrealized Gains	93	0
Gross Unrealized Losses	1,459	2,621
Fair Value	123,658	117,266
State and Political Subdivisions [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	521	873
Gross Unrealized Gains	12	13
Gross Unrealized Losses	0	0
Fair Value	533	886
Corporate Bonds [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	40,442	40,956
Gross Unrealized Gains	0	0
Gross Unrealized Losses	61	251
Fair Value	40,381	40,705
Mortgage Backed Securities and Collateralized Mortgage Obligations-Residential [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	338,519	378,068
Gross Unrealized Gains	164	123
Gross Unrealized Losses	3,152	5,883
Fair Value	335,531	372,308
Small Business Administration-Guaranteed Participation Securities [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	71,169	81,026
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,351	2,527
Fair Value	69,818	78,499
Mortgage Backed Securities and Collateralized Mortgage Obligations-Commercial [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	9,875	10,130
Gross Unrealized Gains	0	0
Gross Unrealized Losses	51	119
Fair Value	9,824	10,011
Other [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	650	650
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	650	650
Debt Securities [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	586,200	631,590
Gross Unrealized Gains	269	136
Gross Unrealized Losses	6,074	11,401
Fair Value	580,395	620,325
Equity Securities [Member]
Amortized cost and fair value of the securities available for sale [Abstract]
Amortized Cost	35	35
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 35	$ 35

Investment Securities, Availa27

Investment Securities, Available-for-sale Securities, Maturities (Details) $ in Thousands	Sep. 30, 2017USD ($)
Amortized Cost [Abstract]
Due in one year or less	$ 50,331
Due in one year through five years	106,105
Due after five years through ten years	10,201
Due after ten years	0
Amortized Cost	586,200
Fair Value [Abstract]
Due in one year or less	50,283
Due in one year through five years	104,749
Due after five years through ten years	10,190
Due after ten years	0
Fair Value	580,395
Mortgage-Backed Securities and Collateralized Mortgage Obligations-Residential [Member]
Amortized Cost [Abstract]
Securities, amortized cost	338,519
Fair Value [Abstract]
Securities, fair value	335,531
Small Business Administration-Guaranteed Participation Securities [Member]
Amortized Cost [Abstract]
Securities, amortized cost	71,169
Fair Value [Abstract]
Securities, fair value	69,818
Mortgage-Backed Securities and Collateralized Mortgage Obligations-Commercial [Member]
Amortized Cost [Abstract]
Securities, amortized cost	9,875
Fair Value [Abstract]
Securities, fair value	$ 9,824

Investment Securities, Availa28

Investment Securities, Available-for-sale Securities, Gross Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available for sale securities unrealized loss position - Fair Value [Abstract]
Less than 12 months - Fair Value	$ 273,882	$ 577,164
12 months or more - Fair Value	270,920	18,653
Total - Fair Value	544,802	595,817
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]
Less than 12 months - Gross Unrealized Loss	2,355	10,717
12 months or more - Gross Unrealized Loss	3,719	684
Total - Gross Unrealized Loss	6,074	11,401
U. S. Government Sponsored Enterprises [Member]
Available for sale securities unrealized loss position - Fair Value [Abstract]
Less than 12 months - Fair Value	24,887	102,266
12 months or more - Fair Value	88,544	0
Total - Fair Value	113,431	102,266
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]
Less than 12 months - Gross Unrealized Loss	113	2,621
12 months or more - Gross Unrealized Loss	1,346	0
Total - Gross Unrealized Loss	1,459	2,621
Corporate Bonds [Member]
Available for sale securities unrealized loss position - Fair Value [Abstract]
Less than 12 months - Fair Value	0	40,705
12 months or more - Fair Value	40,381	0
Total - Fair Value	40,381	40,705
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]
Less than 12 months - Gross Unrealized Loss	0	251
12 months or more - Gross Unrealized Loss	61	0
Total - Gross Unrealized Loss	61	251
Mortgage Backed Securities and Collateralized Mortgage Obligations-Residential [Member]
Available for sale securities unrealized loss position - Fair Value [Abstract]
Less than 12 months - Fair Value	228,925	359,622
12 months or more - Fair Value	82,423	4,713
Total - Fair Value	311,348	364,335
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]
Less than 12 months - Gross Unrealized Loss	1,972	5,766
12 months or more - Gross Unrealized Loss	1,180	117
Total - Gross Unrealized Loss	3,152	5,883
Small Business Administration-Guaranteed Participation Securities [Member]
Available for sale securities unrealized loss position - Fair Value [Abstract]
Less than 12 months - Fair Value	20,070	64,560
12 months or more - Fair Value	49,748	13,940
Total - Fair Value	69,818	78,500
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]
Less than 12 months - Gross Unrealized Loss	270	1,960
12 months or more - Gross Unrealized Loss	1,081	567
Total - Gross Unrealized Loss	1,351	2,527
Mortgage Backed Securities and Collateralized Mortgage Obligations-Commercial [Member]
Available for sale securities unrealized loss position - Fair Value [Abstract]
Less than 12 months - Fair Value	0	10,011
12 months or more - Fair Value	9,824	0
Total - Fair Value	9,824	10,011
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]
Less than 12 months - Gross Unrealized Loss	0	119
12 months or more - Gross Unrealized Loss	51	0
Total - Gross Unrealized Loss	$ 51	$ 119

Investment Securities, Availa29

Investment Securities, Available-for-sale Securities, Transaction Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses [Abstract]
Proceeds from sales	$ 0	$ 0	$ 0	$ 44,829
Proceeds from calls	35,554	70,762	109,123	160,483
Gross realized gains	0	0	0	668
Gross realized losses	0	0	0	0
Sales of available for sale securities	$ 0		$ 0
Income tax expense recognized on net gains on sales and calls of securities available for sale		$ 267		$ 267

Investment Securities, Held-to-

Investment Securities, Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Amortized cost and fair value of the held to maturity securities [Abstract]
Amortized Cost	$ 29,268	$ 45,490
Gross Unrecognized Gains	1,463	2,036
Gross Unrecognized Losses	0	0
Fair Value	30,731	47,526
Mortgage Backed Securities and Collateralized Mortgage Obligations-Residential [Member]
Amortized cost and fair value of the held to maturity securities [Abstract]
Amortized Cost	29,268	35,500
Gross Unrecognized Gains	1,463	1,736
Gross Unrecognized Losses	0	0
Fair Value	$ 30,731	37,236
Corporate Bonds [Member]
Amortized cost and fair value of the held to maturity securities [Abstract]
Amortized Cost		9,990
Gross Unrecognized Gains		300
Gross Unrecognized Losses		0
Fair Value		$ 10,290

Investment Securities, Held-t31

Investment Securities, Held-to-maturity Securities, Maturity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Investment Securities [Abstract]
Sales and transfers of held to maturity securities	$ 0	$ 0	$ 0	$ 0
Amortized Cost [Abstract]
Amortized Cost	29,268		29,268		$ 45,490
Fair Value [Abstract]
Fair Value	30,731		30,731		47,526
Mortgage-Backed Securities and Collateralized Mortgage Obligations-Residential [Member]
Amortized Cost [Abstract]
Securities, amortized cost	29,268		29,268
Amortized Cost	29,268		29,268		35,500
Fair Value [Abstract]
Securities, fair value	30,731		30,731
Fair Value	$ 30,731		$ 30,731		$ 37,236

Loans and Allowance for Loan 32

Loans and Allowance for Loan Losses (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		$ 3,578,282		$ 3,430,586
Less: Allowance for loan losses		44,082	$ 44,162	43,890	$ 43,950	$ 44,064	$ 44,762
Net loans		3,534,200		3,386,696
New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net	[1]	2,763,629		2,692,335
Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		814,653		738,251
Real Estate Construction Loans [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		27,600		24,800
Residential Borrowers [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		17,200		16,300
Commercial Borrowers Residential Purpose [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		10,400		8,500
Commercial [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		187,281		191,194
Less: Allowance for loan losses		4,620	4,596	4,929	5,198	5,046	4,491
Commercial [Member] | New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		173,982		178,905
Commercial [Member] | Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		13,299		12,289
Commercial [Member] | Commercial Real Estate [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		165,208		163,609
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net	[1]	152,228		151,366
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		12,980		12,243
Commercial [Member] | Other [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		22,073		27,585
Commercial [Member] | Other [Member] | New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net	[1]	21,754		27,539
Commercial [Member] | Other [Member] | Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		319		46
Real Estate Mortgage - 1 to 4 Family [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		3,382,723		3,230,574
Less: Allowance for loan losses		38,736	38,871	38,231	38,067	38,589	39,753
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		2,993,849		2,824,087
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net	[1]	2,251,152		2,158,904
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		742,697		665,183
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		77,121		71,646
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net	[1]	64,556		60,892
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		12,565		10,754
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		311,753		334,841
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net	[1]	267,143		286,586
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		44,610		48,255
Installment [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		8,278		8,818
Less: Allowance for loan losses		726	$ 695	730	$ 685	$ 429	$ 518
Installment [Member] | New York and Other States [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net	[1]	6,796		7,048
Installment [Member] | Florida [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Total loans, net		$ 1,482		$ 1,770
[1]	Includes New York, New Jersey, Vermont and Massachusetts.

Loans and Allowance for Loan 33

Loans and Allowance for Loan Losses, Non-accrual Loans, By Loan Class (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Non accrual loans by loan class [Abstract]
Total non-accrual loans	$ 24,547	$ 25,018
Restructured real estate mortgages - 1 to 4 family	40	42
Total nonperforming loans	24,587	25,060
Other real estate owned	2,500	3,500
New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	22,652	23,089
Restructured real estate mortgages - 1 to 4 family	40	42
Total nonperforming loans	22,692	23,131
Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	1,895	1,929
Restructured real estate mortgages - 1 to 4 family	0	0
Total nonperforming loans	1,895	1,929
Residential Real Estate [Member]
Non accrual loans by loan class [Abstract]
Non accrual residential mortgage loans in the process of foreclosure	13,300	12,500
Commercial [Member] | Commercial Real Estate [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	1,596	1,843
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	1,596	1,843
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	0	0
Commercial [Member] | Other [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	100	0
Commercial [Member] | Other [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	100	0
Commercial [Member] | Other [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	18,812	19,386
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	17,048	17,727
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	1,764	1,659
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	35	95
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	35	95
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	3,974	3,646
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	3,843	3,376
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	131	270
Installment [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	30	48
Installment [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	30	48
Installment [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	$ 0	$ 0

Loans and Allowance for Loan 34

Loans and Allowance for Loan Losses, Past Due (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2017	Dec. 31, 2016
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		$ 23,435	$ 27,065
Current		3,554,847	3,403,521
Total loans		3,578,282	3,430,586
Loans that are 90 days past due and still accruing interest		$ 0	$ 0
Number of days past due		90 days	90 days
New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		$ 20,976	$ 23,588
Current		2,742,653	2,668,747
Total loans	[1]	2,763,629	2,692,335
Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,459	3,477
Current		812,194	734,774
Total loans		814,653	738,251
30-59 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		6,263	9,189
30-59 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		5,418	7,198
30-59 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		845	1,991
60-89 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,460	3,188
60-89 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,169	3,113
60-89 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		291	75
90+ Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		14,712	14,688
90+ Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		13,389	13,277
90+ Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		1,323	1,411
Commercial [Member]
Aging of the recorded investment in past due loans [Abstract]
Total loans		187,281	191,194
Commercial [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total loans		173,982	178,905
Commercial [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total loans		13,299	12,289
Commercial [Member] | Commercial Real Estate [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		1,481	1,799
Current		163,727	161,810
Total loans		165,208	163,609
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		1,481	1,799
Current		150,747	149,567
Total loans	[1]	152,228	151,366
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Current		12,980	12,243
Total loans		12,980	12,243
Commercial [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	50
Commercial [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	50
Commercial [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	43
Commercial [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	43
Commercial [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		1,481	1,706
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		1,481	1,706
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Other [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		100	0
Current		21,973	27,585
Total loans		22,073	27,585
Commercial [Member] | Other [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		100	0
Current		21,654	27,539
Total loans	[1]	21,754	27,539
Commercial [Member] | Other [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Current		319	46
Total loans		319	46
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Other [Member] | 30-59 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Other [Member] | 60-89 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		100	0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		100	0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Real Estate Mortgage - 1 to 4 Family [Member]
Aging of the recorded investment in past due loans [Abstract]
Total loans		3,382,723	3,230,574
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		18,964	22,212
Current		2,974,885	2,801,875
Total loans		2,993,849	2,824,087
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		16,505	18,946
Current		2,234,647	2,139,958
Total loans	[1]	2,251,152	2,158,904
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,459	3,266
Current		740,238	661,917
Total loans		742,697	665,183
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30-59 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		5,817	8,321
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		4,972	6,379
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30-59 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		845	1,942
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60-89 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,264	2,993
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		1,973	2,924
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60-89 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		291	69
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		10,883	10,898
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		9,560	9,643
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		1,323	1,255
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		73	146
Current		77,048	71,500
Total loans		77,121	71,646
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		73	127
Current		64,483	60,765
Total loans	[1]	64,556	60,892
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	19
Current		12,565	10,735
Total loans		12,565	10,754
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30-59 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		70	69
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		70	50
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30-59 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	19
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60-89 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	3
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	3
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60-89 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		3	74
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		3	74
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,739	2,791
Current		309,014	332,050
Total loans		311,753	334,841
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,739	2,635
Current		264,404	283,951
Total loans	[1]	267,143	286,586
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	156
Current		44,610	48,099
Total loans		44,610	48,255
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30-59 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		337	685
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		337	685
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30-59 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60-89 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		167	111
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		167	111
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60-89 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,235	1,995
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		2,235	1,839
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	156
Installment [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		78	117
Current		8,200	8,701
Total loans		8,278	8,818
Installment [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		78	81
Current		6,718	6,967
Total loans	[1]	6,796	7,048
Installment [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	36
Current		1,482	1,734
Total loans		1,482	1,770
Installment [Member] | 30-59 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		39	64
Installment [Member] | 30-59 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		39	34
Installment [Member] | 30-59 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	30
Installment [Member] | 60-89 Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		29	38
Installment [Member] | 60-89 Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		29	32
Installment [Member] | 60-89 Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		0	6
Installment [Member] | 90+ Days Past Due [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		10	15
Installment [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		10	15
Installment [Member] | 90+ Days Past Due [Member] | Florida [Member]
Aging of the recorded investment in past due loans [Abstract]
Total 30+ days Past Due		$ 0	$ 0
[1]	Includes New York, New Jersey, Vermont and Massachusetts.

Loans and Allowance for Loan 35

Loans and Allowance for Loan Losses, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	$ 44,162	$ 44,064	$ 43,890	$ 44,762
Loans charged off [Abstract]
Total loan charge offs	847	967	2,103	3,569
Recoveries of loans previously charged off [Abstract]
Total recoveries	217	103	595	407
Net loans charged off	630	864	1,508	3,162
Provision (credit) for loan losses	550	750	1,700	2,350
Balance at end of period	44,082	43,950	44,082	43,950
New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	812	962	1,917	3,446
Recoveries of loans previously charged off [Abstract]
Total recoveries	145	101	523	403
Florida [Member]
Loans charged off [Abstract]
Total loan charge offs	35	5	186	123
Recoveries of loans previously charged off [Abstract]
Total recoveries	72	2	72	4
Commercial [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	4,596	5,046	4,929	4,491
Loans charged off [Abstract]
Total loan charge offs	0	356	72	688
Recoveries of loans previously charged off [Abstract]
Total recoveries	0	3	8	44
Net loans charged off	0	353	64	644
Provision (credit) for loan losses	24	505	(245)	1,351
Balance at end of period	4,620	5,198	4,620	5,198
Commercial [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	0	356	72	688
Recoveries of loans previously charged off [Abstract]
Total recoveries	0	3	8	44
Commercial [Member] | Florida [Member]
Loans charged off [Abstract]
Total loan charge offs	0	0	0	0
Recoveries of loans previously charged off [Abstract]
Total recoveries	0	0	0	0
Real Estate Mortgage - 1 to 4 Family [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	38,871	38,589	38,231	39,753
Loans charged off [Abstract]
Total loan charge offs	778	551	1,866	2,631
Recoveries of loans previously charged off [Abstract]
Total recoveries	209	80	566	317
Net loans charged off	569	471	1,300	2,314
Provision (credit) for loan losses	434	(51)	1,805	628
Balance at end of period	38,736	38,067	38,736	38,067
Real Estate Mortgage - 1 to 4 Family [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	747	549	1,699	2,528
Recoveries of loans previously charged off [Abstract]
Total recoveries	137	78	494	313
Real Estate Mortgage - 1 to 4 Family [Member] | Florida [Member]
Loans charged off [Abstract]
Total loan charge offs	31	2	167	103
Recoveries of loans previously charged off [Abstract]
Total recoveries	72	2	72	4
Installment [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	695	429	730	518
Loans charged off [Abstract]
Total loan charge offs	69	60	165	250
Recoveries of loans previously charged off [Abstract]
Total recoveries	8	20	21	46
Net loans charged off	61	40	144	204
Provision (credit) for loan losses	92	296	140	371
Balance at end of period	726	685	726	685
Installment [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	65	57	146	230
Recoveries of loans previously charged off [Abstract]
Total recoveries	8	20	21	46
Installment [Member] | Florida [Member]
Loans charged off [Abstract]
Total loan charge offs	4	3	19	20
Recoveries of loans previously charged off [Abstract]
Total recoveries	$ 0	$ 0	$ 0	$ 0

Loans and Allowance for Loan 36

Loans and Allowance for Loan Losses, Based on Impairment Review Method (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	$ 0		$ 0
Collectively evaluated for impairment	44,082		43,890
Total ending allowance balance	44,082	$ 44,162	43,890	$ 43,950	$ 44,064	$ 44,762
Loans [Abstract]
Individually evaluated for impairment	24,554		24,025
Collectively evaluated for impairment	3,553,728		3,406,561
Total loans	3,578,282		3,430,586
Commercial [Member]
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	4,620		4,929
Total ending allowance balance	4,620	4,596	4,929	5,198	5,046	4,491
Loans [Abstract]
Individually evaluated for impairment	2,969		2,418
Collectively evaluated for impairment	184,312		188,776
Total loans	187,281		191,194
1 to 4 Family Residential Real Estate [Member]
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	38,736		38,231
Total ending allowance balance	38,736	38,871	38,231	38,067	38,589	39,753
Loans [Abstract]
Individually evaluated for impairment	21,585		21,607
Collectively evaluated for impairment	3,361,138		3,208,967
Total loans	3,382,723		3,230,574
Installment [Member]
Ending allowance balance attributable to loans [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	726		730
Total ending allowance balance	726	$ 695	730	$ 685	$ 429	$ 518
Loans [Abstract]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	8,278		8,818
Total loans	$ 8,278		$ 8,818

Loans and Allowance for Loan 37

Loans and Allowance for Loan Losses, Impaired Receivables (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Impaired loans by loans class [Abstract]
Recorded Investment	$ 24,554	$ 24,025
Unpaid Principal Balance	26,229	26,201
Related Allowance	0	0
Average Recorded Investment	24,964	22,408
New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	21,594	21,361
Unpaid Principal Balance	23,163	23,374
Related Allowance	0	0
Average Recorded Investment	22,087	19,936
Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,960	2,664
Unpaid Principal Balance	3,066	2,827
Related Allowance	0	0
Average Recorded Investment	2,877	2,472
Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,869	2,418
Unpaid Principal Balance	3,916	3,470
Related Allowance	0	0
Average Recorded Investment	2,879	2,214
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,869	2,418
Unpaid Principal Balance	3,916	3,470
Related Allowance	0	0
Average Recorded Investment	2,879	2,214
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	100	0
Unpaid Principal Balance	100	0
Related Allowance	0	0
Average Recorded Investment	100	0
Commercial [Member] | Other [Member] | New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	100	0
Unpaid Principal Balance	100	0
Related Allowance	0	0
Average Recorded Investment	100	0
Commercial [Member] | Other [Member] | Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	18,378	18,684
Unpaid Principal Balance	18,792	19,539
Related Allowance	0	0
Average Recorded Investment	18,932	17,465
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	16,043	16,675
Unpaid Principal Balance	16,351	17,439
Related Allowance	0	0
Average Recorded Investment	16,715	15,665
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,335	2,009
Unpaid Principal Balance	2,441	2,100
Related Allowance	0	0
Average Recorded Investment	2,217	1,800
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	342	363
Unpaid Principal Balance	362	399
Related Allowance	0	0
Average Recorded Investment	358	332
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	252	269
Unpaid Principal Balance	272	305
Related Allowance	0	0
Average Recorded Investment	265	251
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	90	94
Unpaid Principal Balance	90	94
Related Allowance	0	0
Average Recorded Investment	92	81
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,865	2,560
Unpaid Principal Balance	3,059	2,793
Related Allowance	0	0
Average Recorded Investment	2,696	2,397
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,330	1,999
Unpaid Principal Balance	2,524	2,160
Related Allowance	0	0
Average Recorded Investment	2,128	1,806
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	535	561
Unpaid Principal Balance	535	633
Related Allowance	0	0
Average Recorded Investment	$ 568	$ 591

Loans and Allowance for Loan 38

Loans and Allowance for Loan Losses, Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)Contract	Sep. 30, 2016USD ($)Contract	Sep. 30, 2017USD ($)Contract	Sep. 30, 2016USD ($)Contract	Dec. 31, 2016USD ($)
Financing Receivable, Modifications [Line Items]
TDR's classifications from previously performing loans	$ 11,000		$ 11,000		$ 11,500
New York and Other States [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	10	10	37	38
Pre-Modification Outstanding Recorded Investment	$ 1,237	$ 882	$ 5,203	$ 2,743
Post-Modification Outstanding Recorded Investment	$ 1,237	$ 882	$ 5,203	$ 2,743
Florida [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	2	0	8	4
Pre-Modification Outstanding Recorded Investment	$ 251	$ 0	$ 788	$ 459
Post-Modification Outstanding Recorded Investment	$ 251	$ 0	$ 788	$ 459
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	0	0	3	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 747	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 747	$ 0
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	7	7	25	27
Pre-Modification Outstanding Recorded Investment	$ 941	$ 655	$ 3,986	$ 2,383
Post-Modification Outstanding Recorded Investment	$ 941	$ 655	$ 3,986	$ 2,383
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	2	0	7	2
Pre-Modification Outstanding Recorded Investment	$ 251	$ 0	$ 718	$ 408
Post-Modification Outstanding Recorded Investment	$ 251	$ 0	$ 718	$ 408
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	0	1	1	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 44	$ 13	$ 44
Post-Modification Outstanding Recorded Investment	$ 0	$ 44	$ 13	$ 44
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	0	0	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 45
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 45
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	3	2	8	10
Pre-Modification Outstanding Recorded Investment	$ 296	$ 183	$ 457	$ 316
Post-Modification Outstanding Recorded Investment	$ 296	$ 183	$ 457	$ 316
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts | Contract	0	0	1	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 70	$ 6
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 70	$ 6

Loans and Allowance for Loan 39

Loans and Allowance for Loan Losses, Modified Loans Payment Status (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)Contract	Sep. 30, 2016USD ($)Contract	Sep. 30, 2017USD ($)Contract	Sep. 30, 2016USD ($)Contract
Loans and Allowance for Loan Losses [Abstract]
Deferral period of chapter 13 bankruptcies			60 months
Number of days past due when loans are considered to be in payment default			90 days
Contractual past due period for loans to be in payment default			30 days
New York and Other States [Member]
Loans modified for which there was payment default [Abstract]
Number of Contracts | Contract	2	0	3	1
Recorded Investment | $	$ 236	$ 0	$ 239	$ 107
Florida [Member]
Loans modified for which there was payment default [Abstract]
Number of Contracts | Contract	0	0	2	1
Recorded Investment | $	$ 0	$ 0	$ 147	$ 46
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Loans modified for which there was payment default [Abstract]
Number of Contracts | Contract	2	0	2	1
Recorded Investment | $	$ 236	$ 0	$ 236	$ 107
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Loans modified for which there was payment default [Abstract]
Number of Contracts | Contract	0	0	1	0
Recorded Investment | $	$ 0	$ 0	$ 77	$ 0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Loans modified for which there was payment default [Abstract]
Number of Contracts | Contract			0	0
Recorded Investment | $			$ 0	$ 0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Loans modified for which there was payment default [Abstract]
Number of Contracts | Contract	0	0	1	0
Recorded Investment | $	$ 0	$ 0	$ 3	$ 0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Loans modified for which there was payment default [Abstract]
Number of Contracts | Contract			1	1
Recorded Investment | $			$ 70	$ 46

Loans and Allowance for Loan 40

Loans and Allowance for Loan Losses, Risk Category of Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		$ 3,578,282	$ 3,430,586
Non-accrual loans included in classified loans		1,200	1,800
New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net	[1]	2,763,629	2,692,335
Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		814,653	738,251
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		187,281	191,194
Commercial [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		173,982	178,905
Commercial [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		13,299	12,289
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		175,843	174,407
Commercial [Member] | Pass [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		162,544	162,118
Commercial [Member] | Pass [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		13,299	12,289
Commercial [Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		11,438	16,787
Commercial [Member] | Classified [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		11,438	16,787
Commercial [Member] | Classified [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		0	0
Commercial [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		165,208	163,609
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net	[1]	152,228	151,366
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		12,980	12,243
Commercial [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		155,370	148,919
Commercial [Member] | Commercial Real Estate [Member] | Pass [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		142,390	136,676
Commercial [Member] | Commercial Real Estate [Member] | Pass [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		12,980	12,243
Commercial [Member] | Commercial Real Estate [Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		9,838	14,690
Commercial [Member] | Commercial Real Estate [Member] | Classified [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		9,838	14,690
Commercial [Member] | Commercial Real Estate [Member] | Classified [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		0	0
Commercial [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		22,073	27,585
Commercial [Member] | Other [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net	[1]	21,754	27,539
Commercial [Member] | Other [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		319	46
Commercial [Member] | Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		20,473	25,488
Commercial [Member] | Other [Member] | Pass [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		20,154	25,442
Commercial [Member] | Other [Member] | Pass [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		319	46
Commercial [Member] | Other [Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		1,600	2,097
Commercial [Member] | Other [Member] | Classified [Member] | New York and Other States [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		1,600	2,097
Commercial [Member] | Other [Member] | Classified [Member] | Florida [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans, net		$ 0	$ 0
[1]	Includes New York, New Jersey, Vermont and Massachusetts.

Fair Value of Financial Instr41

Fair Value of Financial Instruments, Part 1 (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Securities available for sale [Abstract]
Total securities available for sale	$ 580,430	$ 620,360
Fair value assets transfers from Level 1 to Level 2	0		$ 0
Fair value assets transfers from Level 2 to Level 1	0		$ 0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities available for sale [Abstract]
Total securities available for sale	35	35
Significant Other Observable Inputs (Level 2) [Member]
Securities available for sale [Abstract]
Total securities available for sale	580,395	620,325
Significant Unobservable Inputs (Level 3) [Member]
Securities available for sale [Abstract]
Total securities available for sale	0	0
Carrying Value [Member]
Securities available for sale [Abstract]
Total securities available for sale	580,430	620,360
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities available for sale [Abstract]
U.S. government sponsored enterprises	0	0
State and political subdivisions	0	0
Corporate bonds	0	0
Mortgage backed securities and collateralized mortgage obligations - residential	0	0
Small Business Administration - guaranteed participation securities	0	0
Mortgage backed securities and collateralized mortgage obligations - commercial	0	0
Other securities	35	35
Total securities available for sale	35	35
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Securities available for sale [Abstract]
U.S. government sponsored enterprises	123,658	117,266
State and political subdivisions	533	886
Corporate bonds	40,381	40,705
Mortgage backed securities and collateralized mortgage obligations - residential	335,531	372,308
Small Business Administration - guaranteed participation securities	69,818	78,499
Mortgage backed securities and collateralized mortgage obligations - commercial	9,824	10,011
Other securities	650	650
Total securities available for sale	580,395	620,325
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Securities available for sale [Abstract]
U.S. government sponsored enterprises	0	0
State and political subdivisions	0	0
Corporate bonds	0	0
Mortgage backed securities and collateralized mortgage obligations - residential	0	0
Small Business Administration - guaranteed participation securities	0	0
Mortgage backed securities and collateralized mortgage obligations - commercial	0	0
Other securities	0	0
Total securities available for sale	0	0
Recurring [Member] | Carrying Value [Member]
Securities available for sale [Abstract]
U.S. government sponsored enterprises	123,658	117,266
State and political subdivisions	533	886
Corporate bonds	40,381	40,705
Mortgage backed securities and collateralized mortgage obligations - residential	335,531	372,308
Small Business Administration - guaranteed participation securities	69,818	78,499
Mortgage backed securities and collateralized mortgage obligations - commercial	9,824	10,011
Other securities	685	685
Total securities available for sale	$ 580,430	$ 620,360

Fair Value of Financial Instr42

Fair Value of Financial Instruments, Part 2 (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Impaired loans [Abstract]
Other real estate owned, commercial real estate	$ 358	$ 358	$ 756
Other real estate owned, residential real estate properties	2,500	2,500	3,500
Valuation charge on other real estate owned	461	823	1,200
Impaired loans	24,554	24,554	24,025
Collateral dependent impaired loans	651	651	1,700
Gross charge offs, commercial impaired loans			482
Gross charge offs, residential impaired loans	15	$ 41	$ 226
Nonrecurring [Member] | Sales Comparison Approach [Member] | Other Real Estate Owned [Member]
Impaired loans [Abstract]
Unobservable inputs		Adjustments for differences between comparable sales	Adjustments for differences between comparable sales
Nonrecurring [Member] | Sales Comparison Approach [Member] | Other Real Estate Owned [Member] | Minimum [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales		2.00%	1.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Other Real Estate Owned [Member] | Maximum [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales		10.00%	14.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Other Real Estate Owned [Member] | Weighted Average [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales		4.00%	7.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Impaired loans [Abstract]
Unobservable inputs		Adjustments for differences between comparable sales	Adjustments for differences between comparable sales
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Minimum [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales		2.00%	5.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Maximum [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales		5.00%	14.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Weighted Average [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales		4.00%	10.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Commercial Real Estate [Member]
Impaired loans [Abstract]
Unobservable inputs			Adjustments for differences between comparable sales
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Commercial Real Estate [Member] | Minimum [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales			7.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Commercial Real Estate [Member] | Maximum [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales			35.00%
Nonrecurring [Member] | Sales Comparison Approach [Member] | Impaired Loan [Member] | Commercial Real Estate [Member] | Weighted Average [Member]
Impaired loans [Abstract]
Adjustments for differences between comparable sales			23.00%
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Other real estate owned	0	$ 0	$ 0
Impaired loans [Abstract]
Commercial real estate			0
Real estate mortgage - 1 to 4 family	0	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Other real estate owned	0	0	0
Impaired loans [Abstract]
Commercial real estate			0
Real estate mortgage - 1 to 4 family	0	0	0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Other real estate owned	2,879	2,879	4,268
Impaired loans [Abstract]
Commercial real estate			1,250
Real estate mortgage - 1 to 4 family	651	651	458
Nonrecurring [Member] | Carrying Value [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Other real estate owned	2,879	2,879	4,268
Impaired loans [Abstract]
Commercial real estate			1,250
Real estate mortgage - 1 to 4 family	$ 651	$ 651	$ 458

Fair Value of Financial Instr43

Fair Value of Financial Instruments, Part 3 (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Financial assets [Abstract]
Cash and cash equivalents	$ 624,197	$ 707,274	$ 664,428	$ 718,156
Securities available for sale	580,430	620,360
Held to maturity securities	30,731	47,526
Net loans	3,541,135	3,370,976
Accrued interest receivable	10,813	11,070
Financial liabilities [Abstract]
Demand deposits	397,623	377,755
Interest bearing deposits	3,761,759	3,814,970
Short-term borrowings	216,508	209,406
Accrued interest payable	470	526
Level 1 [Member]
Financial assets [Abstract]
Cash and cash equivalents	624,197	707,274
Securities available for sale	35	35
Held to maturity securities	0	0
Net loans	0	0
Accrued interest receivable	56	145
Financial liabilities [Abstract]
Demand deposits	397,623	377,755
Interest bearing deposits	2,691,853	2,658,945
Short-term borrowings	0	0
Accrued interest payable	67	82
Level 2 [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Securities available for sale	580,395	620,325
Held to maturity securities	30,731	47,526
Net loans	0	0
Accrued interest receivable	2,473	2,654
Financial liabilities [Abstract]
Demand deposits	0	0
Interest bearing deposits	1,069,906	1,156,025
Short-term borrowings	216,508	209,406
Accrued interest payable	402	444
Level 3 [Member]
Financial assets [Abstract]
Cash and cash equivalents	0	0
Securities available for sale	0	0
Held to maturity securities	0	0
Net loans	3,541,135	3,370,976
Accrued interest receivable	8,284	8,271
Financial liabilities [Abstract]
Demand deposits	0	0
Interest bearing deposits	0	0
Short-term borrowings	0	0
Accrued interest payable	0	0
Carrying Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	624,197	707,274
Securities available for sale	580,430	620,360
Held to maturity securities	29,268	45,490
Federal Reserve Bank and Federal Home Loan Bank stock	8,779	9,579
Net loans	3,534,200	3,386,696
Accrued interest receivable	10,813	11,070
Financial liabilities [Abstract]
Demand deposits	397,623	377,755
Interest bearing deposits	3,767,739	3,818,408
Short-term borrowings	216,508	209,406
Accrued interest payable	$ 470	$ 526

Accumulated Other Comprehensi44

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			$ 432,686	$ 413,310
Other comprehensive income (loss) - before reclassifications	$ 562	$ (75)	3,275	7,483
Amount reclassified from accumulated other comprehensive income	(29)	8	(84)	(376)
Other comprehensive income, net of tax	533	(67)	3,191	7,109
Balance	454,928	435,608	454,928	435,608
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(3,593)	2,395	(6,251)	(4,781)
Other comprehensive income, net of tax			3,191	7,109
Balance	(3,060)	2,328	(3,060)	2,328
Net Unrealized Holding Gain (Loss) on Securities Available for Sale, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(4,049)	2,667	(6,762)	(4,492)
Other comprehensive income (loss) - before reclassifications	562	(75)	3,275	7,483
Amount reclassified from accumulated other comprehensive income	0	0	0	(401)
Other comprehensive income, net of tax	562	(75)	3,275	7,084
Balance	(3,487)	2,592	(3,487)	2,592
Net Change in Net Actuarial Gain and Prior Service Cost on Pension and Postretirement Benefit Plans, Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	456	(272)	511	(289)
Other comprehensive income (loss) - before reclassifications	0	0	0	0
Amount reclassified from accumulated other comprehensive income	(29)	8	(84)	25
Other comprehensive income, net of tax	(29)	8	(84)	25
Balance	$ 427	$ (264)	$ 427	$ (264)

Accumulated Other Comprehensi45

Accumulated Other Comprehensive Income (Loss), Reclassifications out of accumulated other comprehensive income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Net gain on securities transactions	$ 0	$ 0	$ 0	$ 668
Salaries and employee benefits	10,360	8,995	30,129	26,932
Income tax effect	7,361	6,667	21,264	19,033
Net income	12,596	10,930	35,783	31,803
Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Net income	29	(8)	84	376
Net Unrealized Holding Gain on Securities Available for Sale [Member] | Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Net gain on securities transactions	0	0	0	668
Income tax effect	0	0	0	(267)
Net income	0	0	0	401
Amortization of Pension and Postretirement Benefit Items [Member] | Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Income tax effect	(20)	6	(56)	17
Net income	29	(8)	84	(25)
Amortization of Net Actuarial Gain [Member] | Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits	72	8	208	25
Amortization of Prior Service Cost [Member] | Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits	$ (23)	$ (22)	$ (68)	$ (67)

Agreement with the Office of 46

Agreement with the Office of the Comptroller of the Currency (Details)	Jul. 21, 2015Director
Agreement with the Office of the Comptroller of the Currency [Abstract]
Minimum number of directors to establishment a committee	3

New Accounting Pronouncements (

New Accounting Pronouncements (Details) $ in Millions	Dec. 31, 2016USD ($)
ASU 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Minimum lease payments	$ 69.7