TrustCo Bank Corp NY (TRST) 10-K 7 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'TRUSTCO BANK CORP N Y	'
Entity Central Index Key	'0000357301	'
Current Fiscal Year End Date	'--12-31	'
Entity Well-known Seasoned Issuer	'No	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Accelerated Filer	'
Entity Public Float	'	$490,535,724
Entity Common Stock, Shares Outstanding	94,564,026	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'FY	'
Document Type	'10-K	'
Amendment Flag	'false	'
Document Period End Date	31-Dec-13	'

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest and dividend income:	'	'	'
Interest and fees on loans	$127,944	$128,581	$129,212
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	17,700	18,776	22,639
Interest on held to maturity securities:	'	'	'
Total interest on held to maturity securities	3,673	5,978	7,491
Federal Reserve Bank and Federal Home Loan Bank stock	490	486	304
Interest on federal funds sold and other short-term investments	1,240	1,142	1,102
Total interest and dividend income	151,047	154,963	160,748
Interest expense:	'	'	'
Interest on deposits	13,800	18,500	24,670
Interest on short-term borrowings	1,483	1,475	1,574
Total interest expense	15,283	19,975	26,244
Net interest income	135,764	134,988	134,504
Provision for loan losses	7,000	12,000	18,750
Net interest income after provision for loan losses	128,764	122,988	115,754
Noninterest income:	'	'	'
Trustco Financial Services income	5,301	5,761	5,088
Fees for services to customers	11,675	12,290	11,305
Net gain on securities transactions	1,622	2,161	1,428
Other	1,172	752	952
Total noninterest income	19,770	20,964	18,773
Noninterest expenses:	'	'	'
Salaries and employee benefits	32,424	31,276	28,751
Net occupancy expense	16,100	15,257	14,687
Equipment expense	6,381	6,073	5,652
Professional services	5,649	6,040	5,729
Outsourced services	5,125	5,122	5,100
Advertising expense	2,827	3,841	2,784
FDIC and other insurance expense	3,975	3,823	4,655
Other real estate expense, net	3,598	3,216	5,693
Other	8,926	9,329	9,091
Total noninterest expense	85,005	83,977	82,142
Income before income taxes	63,529	59,975	52,385
Income taxes	23,717	22,441	19,298
Net income	39,812	37,534	33,087
Earnings per share:	'	'	'
Basic (in dollars per share)	$0.42	$0.40	$0.39
Diluted (in dollars per share)	$0.42	$0.40	$0.39
U. S. government sponsored enterprises [Member]	'	'	'
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	2,600	8,097	12,998
Interest on held to maturity securities:	'	'	'
Total interest on held to maturity securities	0	25	261
State and political subdivisions [Member]	'	'	'
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	562	1,413	2,471
Mortgage-backed securities and collateralized mortgage obligations-residential [Member]	'	'	'
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	11,385	6,697	3,091
Interest on held to maturity securities:	'	'	'
Total interest on held to maturity securities	2,840	4,287	4,765
Corporate bonds [Member]	'	'	'
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	812	2,231	4,059
Interest on held to maturity securities:	'	'	'
Total interest on held to maturity securities	833	1,666	2,465
Small Business Administration-guaranteed participation securities [Member]	'	'	'
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	2,180	319	0
Mortgage-backed securities and collateralized mortgage obligations-Commercial [Member]	'	'	'
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	144	0	0
Other securities [Member]	'	'	'
Interest and dividends on securities available for sale:	'	'	'
Total interest and dividends on securities available for sale	$17	$19	$20

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Comprehensive Income	'	'	'
Net income	$39,812	$37,534	$33,087
Net unrealized holding gain (loss) on securities available for sale	-34,691	10,100	9,062
Reclassification adjustments for net gain recognized in income	-1,622	-2,161	-1,428
Tax effect	14,480	-3,166	-3,045
Net unrealized gain (loss) on securities available for sale, net of tax	-21,833	4,773	4,589
Change in overfunded position in pension and post retirement plans arising during the year	10,559	-1,244	-4,753
Tax effect	-4,210	496	1,895
Change in overfunded position in pension and postretirement plans arising during the year, net of tax	6,349	-748	-2,858
Amortization of net actuarial loss	467	306	85
Amortization of prior service credit	-262	-262	-262
Tax effect	-82	-18	72
Amortization of net actuarial loss and prior service credit on pension and postretirement plans, net of tax	123	26	-105
Other comprehensive income (loss), net of tax	-15,361	4,051	1,626
Comprehensive income	$24,451	$41,585	$34,713

Consolidated_Statements_of_Con

Consolidated Statements of Condition (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$46,453	$55,789
Federal funds sold and other short term investments	536,591	488,227
Total cash and cash equivalents	583,044	544,016
Securities available for sale	863,754	912,092
Held to maturity securities ($90,305 and $151,126 fair value at December 31, 2013 and 2012, respectively)	86,215	143,426
Federal Reserve Bank and Federal Home Loan Bank stock	10,500	9,632
Loans, net of deferred fees and costs	2,908,809	2,684,733
Less: Allowance for loan losses	47,714	47,927
Net loans	2,861,095	2,636,806
Bank premises and equipment, net	34,414	36,239
Other assets	82,430	64,402
Total assets	4,521,452	4,346,613
Deposits:	'	'
Demand	318,456	300,544
Savings accounts	1,218,038	1,198,517
Interest-bearing checking	611,127	560,064
Money market deposit accounts	648,402	667,589
Certificates of deposit (in denominations of $100,000 or more)	419,301	352,734
Other time accounts	711,747	724,745
Total deposits	3,927,071	3,804,193
Short-term borrowings	204,162	159,846
Accrued expenses and other liabilities	28,406	23,776
Total liabilities	4,159,639	3,987,815
Commitments and contingent liabilities	'	'
SHAREHOLDERS' EQUITY:	'	'
Capital stock: $1 par value; 150,000,000 shares authorized, 98,927,123 and 98,912,423 shares issued at December 31, 2013 and 2012, respectively	98,927	98,912
Surplus	173,144	174,899
Undivided profits	147,432	132,378
Accumulated other comprehensive income (loss), net of tax	-13,803	1,558
Treasury stock: 4,463,786 and 4,977,179 shares, at cost, at December 31, 2013 and 2012, respectively	-43,887	-48,949
Total shareholders' equity	361,813	358,798
Total liabilities and shareholders' equity	$4,521,452	$4,346,613

Consolidated_Statements_of_Con1

Consolidated Statements of Condition (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
ASSETS	'	'
Held to maturity securities, fair value	$90,305	$151,126
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)	98,927,123	98,912,423
Treasury stock, at cost (in shares)	4,463,786	4,977,179

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Capital Stock [Member]	Surplus [Member]	Undivided Profits [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
In Thousands
Balance at Dec. 31, 2010	$83,166	$126,982	$108,780	($4,119)	($59,369)	$255,440
Net Income	0	0	33,087	0	0	33,087
Change in other comprehensive income (loss), net of tax	0	0	0	1,626	0	1,626
Net proceeds from stock offering	15,640	51,938	0	0	0	67,578
Issuance of restricted stock	106	-106	0	0	0	0
Cash dividend declared	0	0	-22,402	0	0	-22,402
Sale of treasury stock	0	-2,463	0	0	5,363	2,900
Stock based compensation expense	0	287	0	0	0	287
Balance at Dec. 31, 2011	98,912	176,638	119,465	-2,493	-54,006	338,516
Net Income	0	0	37,534	0	0	37,534
Change in other comprehensive income (loss), net of tax	0	0	0	4,051	0	4,051
Cash dividend declared	0	0	-24,621	0	0	-24,621
Sale of treasury stock	0	-2,144	0	0	5,057	2,913
Stock based compensation expense	0	405	0	0	0	405
Balance at Dec. 31, 2012	98,912	174,899	132,378	1,558	-48,949	358,798
Net Income	0	0	39,812	0	0	39,812
Change in other comprehensive income (loss), net of tax	0	0	0	-15,361	0	-15,361
Stock options and related tax benefits	15	61	0	0	-40	36
Cash dividend declared	0	0	-24,758	0	0	-24,758
Sale of treasury stock	0	-2,194	0	0	5,102	2,908
Stock based compensation expense	0	378	0	0	0	378
Balance at Dec. 31, 2013	$98,927	$173,144	$147,432	($13,803)	($43,887)	$361,813

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Changes in Shareholders' Equity	'	'	'
Shares issued in stock offering (in shares)	'	'	15,640,000
Issuance of restricted stock (in shares)	'	'	106,000
Cash dividend declared (in dollars per share)	$0.26	$0.26	$0.26
Sale of treasury stock (in shares)	518,726	514,097	545,236

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:	'	'	'
Net income	$39,812	$37,534	$33,087
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	5,017	5,032	4,836
Net (gain) loss on sale of other real estate owned	-509	364	478
Writedown of other real estate owned	2,166	1,059	3,454
Provision for loan losses	7,000	12,000	18,750
Deferred tax (benefit) expense	-1,426	1,440	-2,336
Stock based compensation expense	378	405	287
Net gain on sale of bank premises and equipment	-16	-3	-4
Net gain on securities transactions	-1,622	-2,161	-1,428
Decrease (increase) in taxes receivable	-38	1,390	473
Decrease (increase) in interest receivable	554	2,200	-774
Increase (decrease) in interest payable	19	-313	-311
Decrease (increase) in other assets	7,047	-2,780	4,614
Increase in accrued expenses and other liabilities	4,577	2,462	192
Total adjustments	23,147	21,095	28,231
Net cash provided by operating activities	62,959	58,629	61,318
Cash flows from investing activities:	'	'	'
Proceeds from sales and calls of securities available for sale	417,204	1,204,250	1,171,945
Purchases of securities available for sale	-416,617	-1,199,986	-1,207,157
Proceeds from maturities of securities available for sale	13,060	2,462	20,243
Proceeds from calls and maturities of held to maturity securities	57,211	83,165	87,320
Purchases of held to maturity securities	0	-10,303	-111,896
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock	-868	-628	-2,143
Proceeds from redemptions of Federal Reserve Bank and Federal Home Loan Bank stock	0	0	53
Net increase in loans	-243,937	-190,843	-188,776
Proceeds from dispositions of other real estate owned	10,967	9,760	9,013
Proceeds from dispositions of bank premises and equipment	16	3	7
Purchases of bank premises and equipment	-6,381	-4,265	-5,213
Net cash used in investing activities	-169,345	-106,385	-226,604
Cash flows from financing activities:	'	'	'
Net increase in deposits	122,878	68,220	181,886
Net increase in short-term borrowings	44,316	12,283	22,948
Proceeds from exercise of stock options and related tax benefits	36	0	0
Proceeds from sales of treasury stock	2,908	2,913	2,900
Net proceeds from common stock offering	0	0	67,578
Dividends paid	-24,724	-24,587	-21,333
Net cash provided by (used in) financing activities	145,414	58,829	253,979
Net increase in cash and cash equivalents	39,028	11,073	88,693
Cash and cash equivalents at beginning of period	544,016	532,943	444,250
Cash and cash equivalents at end of period	583,044	544,016	532,943
Cash paid during the year for:	'	'	'
Interest paid	15,264	20,288	26,555
Income taxes paid	23,821	21,052	18,824
Non cash investing and financing activities:	'	'	'
Transfer of loans to real estate owned	12,648	14,623	10,794
Transfer of building to other assets	3,189	0	0
Increase in dividends payable	34	34	1,069
Change in unrealized gain (loss) on securities available for sale - gross of deferred taxes	-36,313	7,939	7,634
Change in deferred tax effect on unrealized gain (loss) on securities available for sale, net of reclassification adjustment	14,480	-3,166	-3,045
Amortization of net actuarial loss and prior service credit on pension and post retirement plans, gross of deferred taxes	205	44	-177
Change in deferred tax effect of amortization of net actuarial loss and prior service credit on pension and post retirement plans	-82	-18	72
Change in overfunded position in pension and post retirement plans arising during the year	10,559	-1,244	-4,753
Deferred tax effect of change in overfunded position of pension and post retirement benefit plans (ASC 715)	($4,210)	$496	$1,895

Basis_of_Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2013
Basis of Presentation [Abstract]	'
Basis of Presentation	'
	(1) Basis of Presentation
	The accounting and financial reporting policies of TrustCo Bank Corp NY (the Company or TrustCo), ORE Subsidiary Corp., Trustco Bank (referred to as Trustco Bank or the Bank), and its wholly owned subsidiaries, Trustco Realty Corporation, Trustco Insurance Agency, Inc., ORE Property, Inc. and its subsidiaries ORE Property One, Inc. and ORE Property Two, Inc. conform to general practices within the banking industry and are in conformity with U.S. generally accepted accounting principles. A description of the more significant policies follows.
	The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
	Consolidation
	The consolidated financial statements of the Company include the accounts of the subsidiaries after elimination of all significant intercompany accounts and transactions.
	Use of Estimates
	To prepare financial statements in conformity with U.S. generally accepted accounting principles, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. The allowance for loan losses, other real estate owned and the fair value of financial instruments are particularly subject to change, which may be material.
	Securities Available for Sale and Held to Maturity
	Securities available for sale are carried at fair value with any unrealized appreciation or depreciation of value, net of tax, included as an element of accumulated other comprehensive income or loss in shareholders’ equity. Management maintains an available for sale portfolio in order to provide maximum flexibility in balance sheet management. The designation of available for sale is made at the time of purchase based upon management’s intent to hold the securities for an indefinite period of time. These securities, however, are available for sale in response to changes in market interest rates, related changes in liquidity needs, or changes in the availability of and yield on alternative investments. Unrealized losses on securities that reflect a decline in value which is other than temporary, if any, are charged to income.
	The cost of debt securities available for sale is adjusted for amortization of premium and accretion of discount using the interest method. Premiums and discounts on securities are amortized on the interest method without anticipating prepayments, except for mortgage backed securities where prepayments are anticipated.
	Gains and losses on the sale of securities available for sale are based on the amortized cost of the specific security sold at trade date.
	Debt securities that management has the positive intent and ability to hold until maturity are classified as held to maturity and are carried at their remaining unpaid principal balance, net of unamortized premiums or unaccreted discounts. Premiums are amortized and discounts are accreted using the interest method over the estimated remaining term of the underlying security.
	Other Than Temporary Impairment (“OTTI”)
	A decline in the fair value of any available for sale or held to maturity security below cost that is deemed to be other than temporary is charged to earnings and/or accumulated other comprehensive income, resulting in the establishment of a new cost basis of the security. Management evaluates these types of securities for OTTI at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. Additional discussion of OTTI is included in Note 3 of the consolidated financial statements.
	Federal Reserve Bank and Federal Home Loan Bank stock
	The Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income. The Bank is also a member of its regional Federal Reserve Bank. FRB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income.
	Loans
	Loans are carried at the principal amount outstanding net of unearned income and unamortized loan fees and costs, which are recognized as adjustments to interest income over the applicable loan term. Interest income on loans is accrued based on the principal amount outstanding.
	Nonperforming loans include non-accrual loans, restructured loans, and loans which are three payments or more past due and still accruing interest. Generally, loans are placed in non-accrual status either due to the delinquent status of principal and/or interest payments, or a judgment by management that, although payments of principal and/or interest are current, such action is prudent based upon specific facts and circumstances surrounding the borrower. Typically, a loan is moved to non-accrual status after 90 days of non-payment in accordance with the Company’s policy. Past due status is based on the contractual terms of the loan. All interest accrued but not received for loans placed on non-accrual status is reversed against interest income. Future payments received on nonperforming loans are recorded as interest income or principal reductions based upon management’s ultimate expectation for collection. Loans may be removed from non-accrual status when they become current as to principal and interest and have demonstrated a sustained ability to make loan payments in accordance with the contractual terms of the loan. Loans may also be removed from non-accrual status when, in the opinion of management, the loan is expected to be fully collectable as to principal and interest. When, in the opinion of management, the collection of principal appears unlikely, the loan balance is evaluated in light of its sources of repayment, and a charge-off is recorded when appropriate.
	Loan origination fees, net of certain direct origination costs, are deferred and recognized using the level yield method without anticipating prepayments.
	Allowance for Loan Losses
	The allowance for loan losses is maintained at a level considered adequate by management to provide for probable incurred loan losses. The allowance is increased by provisions charged against income, while loan losses are charged against the allowance when management deems a loan balance to be uncollectible. Subsequent recoveries, if any, are credited to the allowance.
	The Company performs an analysis of the adequacy of the allowance on at least a quarterly basis. Management estimates the allowance balance required using past loan loss experience, the nature and volume of the portfolio, information about specific borrower situations, current economic conditions, past due and charge-off trends and other factors. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses. Such agencies may require the Company to change the allowance based on their judgments of information available to them at the time of their examination. Allocations of the allowance may be made for specific loans, but the entire allowance is available for any loan that, in management’s judgment, should be charged off. The allowance methodology consists of specific and general components. The specific component relates to loans that are individually classified as impaired.
	A loan is impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Additionally, loans for which the terms have been modified resulting in a concession, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings (TDR’s) and classified as impaired.
	Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed.
	Commercial and commercial real estate loans in non-accrual status are defined as impaired loans and are individually evaluated for impairment. The Company also has a portfolio of residential restructured loans that are defined as impaired. If a loan is impaired, a charge-off is taken so that the loan is reported at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral, if repayment is expected solely from the collateral. Residential real estate loans and consumer loans are collectively evaluated for impairment.
	TDR’s are measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a TDR is considered to be a collateral dependent loan, the loan is reported at the fair value of the collateral with any charge-off recognized at that time. For TDR’s that subsequently default, the Company determines the amount of additional charge-off, if any, in accordance with the accounting policy for the allowance for loan losses with respect to impaired loans described previously.
	The general component of the allowance covers non-impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by geography for each portfolio segment and is based on the actual net loss history experienced by the Company over the most recent four years. This actual loss experience is supplemented with other economic factors based on the risks present in each geography and portfolio segment. These economic factors include consideration of the following: changes in national, regional and local economic trends and conditions; effects of any changes in interest rates; changes in the volume and severity of net charge-offs, delinquencies, nonperforming loans; changes in the experience, ability, and depth of lending management and other relevant staff; effects of any changes in credit concentrations; effects of any changes in underwriting standards, lending policies, procedures, and practices; and changes in the nature, volume and terms of loans.
	The Company’s allowance methodology also includes additional allocation percentages for residential and installment loans in non-accrual status and residential and installment loans three payments past due and still accruing interest, commercial loans classified by the internal loan review grading process, and residential loans with loan-to-value ratios in excess of 90% at the time of origination. The reserve percentages are determined based upon a review of recent charge-offs and take into consideration the type of loan, the fixed or variable nature of the loan, and the type and geography of the underlying collateral, if any.
	The following portfolio segments have been identified: commercial loans, 1-to-4 family residential real estate loans, and installment loans:
	Commercial:
	Commercial real estate loans and other commercial loans are made based primarily on the identified cash flow of the borrower and secondarily on the underlying collateral provided by the borrower. Commercial real estate collateral is generally located within the Bank’s geographic territories; while collateral for non-real estate secured commercial loans is typically accounts receivable, inventory, and/or equipment. Repayment is primarily dependent upon the borrower’s ability to service the debt based upon cash flows generated from the underlying business. Additional support involves liquidation of the pledged collateral and enforcement of a personal guarantee, if a guarantee is obtained.
	Residential real estate:
	Residential real estate loans, including first mortgages, home equity loans and home equity lines of credit, are collateralized by first or second liens on one-to-four family residences generally located within the Bank’s market areas. Proof of ownership title, clear mortgage title, and hazard insurance coverage are normally required.
	Installment:
	The Company’s installment loans are primarily made up of installment loans and personal lines of credit. The installment loans represent a relatively small portion of the loan portfolio and are primarily used for personal expenses and are secured by automobiles, equipment and other forms of collateral, while personal lines of credit are unsecured.
	Bank Premises and Equipment
	Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on either the straight-line or accelerated methods over the remaining useful lives of the assets; generally 20 to 40 years for buildings, 3 to 7 years for furniture and equipment, and the shorter of the estimated life of the asset or the lease term for leasehold improvements.
	Other Real Estate Owned
	Other real estate owned are assets acquired through foreclosures on loans. At both December 31, 2013 and 2012 there were $8.7 million of other real estate owned included in the category of Other Assets in the accompanying Consolidated Statements of Condition.
	Each other real estate owned property is recorded on an individual basis at the lower of (1) fair value minus estimated costs to sell or (2) “cost” (which is the fair value at initial foreclosure). When a property is acquired, the excess of the loan balance over fair value is charged to the allowance for loan losses. Subsequent write downs and gains and losses on sale are included in noninterest expense. Operating costs after acquisition are expensed.
	Income Taxes
	Deferred taxes are recorded for the future tax consequences of events that have been recognized in the financial statements or tax returns based upon enacted tax laws and rates. Deferred tax assets are recognized subject to management’s judgment that realization is more likely than not.
	Dividend Restrictions
	The Company’s ability to pay dividends to its shareholders is dependent upon the ability of the Bank to pay dividends to the Company. The payment of dividends by the Bank to the Company is subject to continued compliance with minimum regulatory capital requirements and the filing of notices or applications with the Bank’s and the Company’s regulators. The Bank’s primary regulator may disapprove a dividend if: the Bank would be undercapitalized following the distribution; the proposed capital distribution raises safety and soundness concerns; or the capital distribution would violate a prohibition contained in any statue, regulation or agreement between the Bank and a regulator or a condition imposed in a previously approved application or notice. Currently the Bank meets the regulatory definition of a well capitalized institution. During 2014, the Bank could declare dividends of approximately $30.2 million plus any 2014 net profits retained to the date of the dividend declaration.
	Benefit Plans
	The Company has a defined benefit pension plan covering substantially all of its employees. The benefits are based on years of service and the employee’s compensation. This plan was frozen as of December 31, 2006.
	The Company has a postretirement benefit plan that permits retirees under age 65 to participate in the Company’s medical plan by which retirees pay all of their premiums. At age 65, the Company provides access to a Medicare Supplemental program for retirees.
	Under certain employment contracts with selected executive officers, the Company is obligated to provide postretirement benefits to these individuals once they attain certain vesting requirements.
	The Company recognized in the Consolidated Statement of Condition the funded status of the pension plan and postretirement benefit plan with an offset, net of tax, recorded in accumulated other comprehensive income.
	Stock Based Compensation Plans
	The Company has stock based compensation plans for employees and directors. Compensation cost is recognized for stock options and restricted stock awards issued to employees and directors based on the fair value of these awards at the date of grant. A Black-Scholes model is utilized to estimate the fair value of stock options, while the fair value of the Company’s common stock at the date of grant is used for restricted stock awards. Awards to be settled in cash based on the fair value of the Company’s stock at vesting are treated as liability based awards.
	Compensation cost for stock options and restricted stock awards to be settled in stock are recognized over the required service period generally defined as the vesting period. The expense is recognized over the shorter of each award’s vesting period or the retirement date for any awards that vest immediately upon eligible retirement.
	Compensation costs for liability based awards are re-measured at each reporting date and recognized over the vesting period. For awards with performance based conditions, compensation cost is recognized over the performance period based on the Company’s expectation of meeting the specific performance criteria.
	Earnings Per Share
	Basic earnings per common share is net income divided by the weighted average number of common shares outstanding during the period. All outstanding unvested share-based payment awards that contain rights to nonforfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under stock options
	Reclassification of Prior Year Statements
	It is the Company’s policy to reclassify prior year consolidated financial statements to conform to the current year presentation.
	Segment Reporting
	The Company’s operations are exclusively in the financial services industry and include the provision of traditional banking services. Management evaluates the performance of the Company based on only one business segment, that of community banking. The Company operates primarily in the geographical region of Upstate New York with branches also in Florida and the mid-Hudson valley region of New York. In the opinion of management, the Company does not have any other reportable segments as defined by “Accounting Standards Codification” (ASC) Topic 280, “Disclosure about Segments of an Enterprise and Related Information”.
	Cash and Cash Equivalents
	The Company classifies cash on hand, cash due from banks, Federal Funds sold, and other short-term investments as cash and cash equivalents for disclosure purposes.
	Trust Assets
Assets under management with the Trustco Financial Services Department are not included on the Company’s consolidated financial statements because Trustco Financial Services holds these assets in a fiduciary capacity.
Comprehensive Income
Comprehensive income represents the sum of net income and items of other comprehensive income or loss, which are reported directly in shareholders’ equity, net of tax, such as the change in net unrealized gain or loss on securities available for sale and changes in the funded position of the pension and postretirement benefit plans. Accumulated other comprehensive income or loss, which is a component of shareholders’ equity, represents the net unrealized gain or loss on securities available for sale, net of tax and the funded position in the Company’s pension plan and postretirement benefit plans, net of tax.
Fair Value of Financial Instruments
Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in Note 13. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect these estimates.

Balances_at_Other_Banks

Balances at Other Banks	12 Months Ended
	Dec. 31, 2013
Balances at Other Banks [Abstract]	'
Balances at Other Banks	'
	(2) Balances at Other Banks
	The Company is required to maintain certain reserves of vault cash and/or deposits with the Federal Reserve Bank. The amount of this reserve requirement, included in cash and due from banks and federal funds sold and other short term investments, was approximately $83.6 million and $75.7 million at December 31, 2013 and 2012, respectively.

Investment_Securities

Investment Securities	12 Months Ended
	Dec. 31, 2013
Investment Securities [Abstract]	'
Investment Securities	'
	(3) 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)	31-Dec-13
				Gross		Gross
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gains		Losses		Value
	U.S. government sponsored enterprises	$	200,531		22		1,724		198,829
	State and political subdivisions		7,623		135		-		7,758
	Mortgage backed securities and collateralized mortgage obligations - residential		552,230		267		20,048		532,449
	Corporate bonds		10,429		43		1		10,471
	Small Business Administration-guaranteed participation securities		111,383		-		8,354		103,029
	Mortgage backed securities and collateralized mortgage obligations - commercial		10,965		-		407		10,558
	Other		650		-		-		650
	Total debt securities		893,811		467		30,534		863,744
	Equity securities		10		-		-		10
	Total securities available for sale	$	893,821		467		30,534		863,754
		31-Dec-12
				Gross		Gross
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gains		Losses		Value
	U.S. government sponsored enterprises	$	262,063		1,055		10		263,108
	State and political subdivisions		25,815		642		-		26,457
	Mortgage backed securities and collateralized mortgage obligations - residential		515,322		3,982		528		518,776
	Corporate bonds		26,312		336		119		26,529
	Small Business Administration-guaranteed participation securities		75,674		888		-		76,562
	Other		650		-		-		650
	Total debt securities		905,836		6,903		657		912,082
	Equity securities		10		-		-		10
	Total securities available for sale	$	905,846		6,903		657		912,092
	The following table distributes the debt securities included in the available for sale portfolio as of December 31, 2013, based on the securities’ final maturity (mortgage-backed securities and collateralized mortgage obligations are stated using an estimated average life):
	(dollars in thousands)	Amortized		Fair
		Cost		Value
	Due in one year or less	$	11,221		11,284
	Due in one year through five years		359,564		355,727
	Due after five years through ten years		520,721		494,395
	Due after ten years		2,305		2,338
		$	893,811		863,744
	Actual maturities may differ from the above because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty.
	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)	31-Dec-13
		Less than				12 months
		12 months				or more				Total
				Gross				Gross				Gross
		Fair		Unreal.		Fair		Unreal.		Fair		Unreal.
		Value		Loss		Value		Loss		Value		Loss
	U.S. government sponsored enterprises	$	198,023		1,724		-		-		198,023		1,724
	Mortgage backed securities and collateralized mortgage obligations - residential		466,056		17,698		54,835		2,350		520,891		20,048
	Corporate bonds		902		1		-		-		902		1
	Small Business Administration-guaranteed participation securities		103,029		8,354		-		-		103,029		8,354
	Mortgage backed securities and collateralized mortgage obligations - commercial		10,558		407		-		-		10,558		407
	Total	$	778,568		28,184		54,835		2,350		833,403		30,534
		31-Dec-12
		Less than				12 months
		12 months				or more				Total
				Gross				Gross				Gross
		Fair		Unreal.		Fair		Unreal.		Fair		Unreal.
		Value		Loss		Value		Loss		Value		Loss
	U.S. government sponsored enterprises	$	15,491		10		-		-		15,491		10
	Mortgage backed securities and collateralized mortgage obligations - residential		178,689		528		-		-		178,689		528
	Corporate bonds		10,283		119		-		-		10,283		119
	Total	$	204,463		657		-		-		204,463		657
	The proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses from sales and calls during 2013, 2012 and 2011 are as follows:
(dollars in thousands)	Year ended December 31,
	2013		2012		2011
Proceeds from sales	$	160,820		154,944		47,296
Proceeds from calls		256,384		1,049,306		1,124,649
Gross realized gains		1,702		2,584		1,472
Gross realized losses		80		423		44
Tax expense recognized on net gains on sales of securities available for sale were approximately $649 thousand, $864 thousand, and $571 thousand for the years ended December 31, 2013, 2012, 2011 respectively.
The amount of securities that have been pledged to secure short-term borrowings and for other purposes amounted to $316.7 million and $261.1 million at December 31, 2013 and 2012, respectively.
(b) Held to maturity securities
The amortized cost and fair value of the held to maturity securities are as follows:
(dollars in thousands)	31-Dec-13
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities and collateralized mortgage obligations - residential	$	76,270		2,744		138		78,876
Corporate bonds		9,945		1,484		-		11,429
Total held to maturity	$	86,215		4,228		138		90,305
	31-Dec-12
			Gross		Gross
	Amortized		Unrecognized		Unrecognized		Fair
	Cost		Gains		Losses		Value
Mortgage backed securities and collateralized mortgage obligations - residential	$	108,471		5,724		-		114,195
Corporate bonds		34,955		1,976		-		36,931
Total held to maturity	$	143,426		7,700		-		151,126
The following table distributes the debt securities included in the held to maturity portfolio as of December 31, 2013, based on the securities’ final maturity (mortgage-backed securities and collateralized mortgage obligations are stated using an estimated average life):
(dollars in thousands)	Amortized		Fair
	Cost		Value
Due in one year or less	$	-		-
Due in one year through five years		86,215		90,305
Due in five years through ten years		-		-
	$	86,215		90,305
Actual maturities may differ from the above because of securities prepayments and the right of certain issuers to call or prepay their obligations without penalty.
Gross unrecognized losses on held to maturity securities and the related fair values aggregated by the length of time that individual securities have been in an unrecognized loss position at December 31, 2013, were as follows:
(dollars in thousands)	31-Dec-13
	Less than				12 months
	12 months				or more				Total
			Gross				Gross				Gross
	Fair		Unrec.		Fair		Unrec.		Fair		Unrec.
	Value		Loss		Value		Loss		Value		Loss
Mortgage backed securities and collateralized mortgage obligations - residential	$	27,091		138		-		-		27,091		138
Total	$	27,091		138		-		-		27,091		138
There were no held to maturity securities in an unrecognized loss position at December 31, 2012.  There were no sales or transfers of held to maturity securities during 2013 and 2012.
(c) Concentrations
The Company has the following balances of securities held in the available for sale and held to maturity portfolios as of December 31, 2013 that represent greater than 10% of shareholders equity:
	Amortized		Fair
	Cost		Value
Small Business Administration	$	111,383		103,029
Federal Home Loan Mortgage Corporation		159,375		154,492
Government National Mortgage Association		100,578		101,947
Federal National Mortgage Association		538,260		523,070
(d) 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 generally evaluated for OTTI under ASC 320 “Investments – Debt and Equity Securities.”
In determining OTTI under the FASB 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 an other-than-temporary decline exists involves a high degree of subjectivity and judgment and is based on the information available to management at a point in time.
When OTTI occurs, 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 December 31, 2013, the Company’s security portfolio consisted of 209 securities, 111 of which were in an unrealized loss position, and are discussed below.
U.S. government-sponsored enterprises
In the case of unrealized losses on U.S. government-sponsored enterprises, because the decline in fair value is 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 December 31, 2013.
Mortgage-backed securities and collateralized mortgage obligations - residential
At December 31, 2013, all of the mortgage-backed securities and collateralized mortgage obligations held by the Company were issued by U.S. government-sponsored entities and agencies, primarily Ginnie Mae, Fannie Mae and Freddie Mac, institutions which the government has affirmed its commitment to support. Because the decline in fair value is 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 December 31, 2013.
Corporate bonds
In the case of corporate bonds, the Company exposure is primarily in bonds of firms in the financial sector. All of the corporate bonds owned continue to be rated investment grade, all are current as to the payment of interest and the Company expects to collect the full amount of the principal balance at maturity. The Company actively monitors the firms and the bonds. The Company has concluded that the decline in fair value is not attributable to 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 December 31, 2013.
Small Business Administration (SBA) - guaranteed participation securities
At December 31, 2013, all of the SBA securities held by the Company were issued and guaranteed by U.S. Small Business Administration. Because the decline in fair value is 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 December 31, 2013.
Mortgage-backed securities and collateralized mortgage obligations - commercial
As of December 31, 2013, all of the mortgage-backed securities and collateralized mortgage obligations held by the Company were issued by U.S. government-sponsored entities and agencies, are current as to the payment of interest and principal and the Company expects to collect the full amount of the principal and interest payments. Because the decline in fair value is 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 December 31, 2013.
As a result of the above analysis, for the year ended December 31, 2013, the Company did not recognize any other-than-temporary impairment losses for credit or any other reason.

Loans_and_Allowance_for_Loan_L

Loans and Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2013
Loans and Allowance for Loan Losses [Abstract]	'
Loans and Allowance for Loan Losses	'
	(4) Loans and Allowance for Loan Losses
	The following tables present the recorded investment in loans by loan class:
		31-Dec-13
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Commercial:
	Commercial real estate	$	169,722		21,404		191,126
	Other		32,323		32		32,355
	Real estate mortgage - 1 to 4 family:
	First mortgages		1,909,447		378,361		2,287,808
	Home equity loans		47,494		3,642		51,136
	Home equity lines of credit		304,044		36,445		340,489
	Installment		5,292		603		5,895
	Total loans, net	$	2,468,322		440,487		2,908,809
	Less: Allowance for loan losses						47,714
	Net loans					$	2,861,095
		31-Dec-12
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Commercial:
	Commercial real estate	$	167,249		18,882		186,131
	Other		33,381		65		33,446
	Real estate mortgage - 1 to 4 family:
	First mortgages		1,814,214		275,764		2,089,978
	Home equity loans		35,601		1,089		36,690
	Home equity lines of credit		301,338		32,571		333,909
	Installment		4,183		396		4,579
	Total loans, net	$	2,355,966		328,767		2,684,733
	Less: Allowance for loan losses						47,927
	Net loans					$	2,636,806
	* Includes New York, New Jersey, Vermont, and Massachusetts.
	At December 31, 2013 and 2012, the Company had approximately $35.4 million and $37.2 million of real estate construction loans. As of December 31, 2013, approximately $13.9 million are secured by first mortgages to residential borrowers while approximately $21.5 million were to commercial borrowers for residential construction projects. Of the $37.2 million in real estate construction loans at December 31, 2012, approximately $16.4 million were secured by first mortgages to residential borrowers with the remaining $20.8 million were to commercial borrowers for residential construction projects. The vast majority of construction loans are in the Company’s New York market.
	At December 31, 2013 and 2012, loans to executive officers, directors, and to associates of such persons aggregated $9.3 million and $8.1 million, respectively. During 2013, approximately $2.7 million of new loans were made and repayments of loans totaled approximately $1.5 million. All loans are current according to their terms.
	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:
		31-Dec-13
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Loans in nonaccrual status:
	Commercial:
	Commercial real estate	$	6,620		-		6,620
	Other		332		-		332
	Real estate mortgage - 1 to 4 family:
	First mortgages		26,713		4,781		31,494
	Home equity loans		691		-		691
	Home equity lines of credit		3,641		356		3,997
	Installment		93		-		93
	Total non-accrual loans		38,090		5,137		43,227
	Restructured real estate mortgages - 1 to 4 family		166		-		166
	Total nonperforming loans	$	38,256		5,137		43,393
		31-Dec-12
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Loans in nonaccrual status:
	Commercial:
	Commercial real estate	$	6,511		2,698		9,209
	Other		124		-		124
	Real estate mortgage - 1 to 4 family:
	First mortgages		30,329		7,319		37,648
	Home equity loans		694		-		694
	Home equity lines of credit		4,263		501		4,764
	Installment		6		1		7
	Total non-accrual loans		41,927		10,519		52,446
Restructured real estate mortgages - 1 to 4 family		231		-		231
Total nonperforming loans	$	42,158		10,519		52,677
As of December 31, 2013 and 2012, the Company’s loan portfolio did not include any subprime mortgages or loans acquired with deteriorated credit quality.
The following tables present the aging of the recorded investment in past due loans by loan class and by region as of December 31, 2013 and 2012:
New York and other states:
	31-Dec-13
(dollars in thousands)		30-59		60-89		90	+	Total
	Days		Days		Days			30+ days				Total
	Past Due		Past Due		Past Due			Past Due		Current		Loans
Commercial:
Commercial real estate	$	583		1,426		3,379			5,388		164,334		169,722
Other		209		-		123			332		31,991		32,323
Real estate mortgage - 1 to 4 family:
First mortgages		4,664		2,042		17,624			24,330		1,885,117		1,909,447
Home equity loans		46		18		552			616		46,878		47,494
Home equity lines of credit		1,014		331		1,897			3,242		300,802		304,044
Installment		85		12		77			174		5,118		5,292
Total	$	6,601		3,829		23,652			34,082		2,434,240		2,468,322
Florida:
(dollars in thousands)	30-59			60-89		90	+	Total
	Days		Days		Days			30+ days				Total
	Past Due		Past Due		Past Due			Past Due		Current		Loans
Commercial:
Commercial real estate	$	-		-		-			-		21,404		21,404
Other		-		-		-			-		32		32
Real estate mortgage - 1 to 4 family:
First mortgages		552		-		4,229			4,781		373,580		378,361
Home equity loans		-		-		-			-		3,642		3,642
Home equity lines of credit		109		-		247			356		36,089		36,445
Installment		-		2		-			2		601		603
Total	$	661		2		4,476			5,139		435,348		440,487
Total:
(dollars in thousands)		30-59		60-89		90	+	Total
	Days		Days		Days			30+ days				Total
	Past Due		Past Due		Past Due			Past Due		Current		Loans
Commercial:
Commercial real estate	$	583		1,426		3,379			5,388		185,738		191,126
Other		209		-		123			332		32,023		32,355
Real estate mortgage - 1 to 4 family:
First mortgages		5,216		2,042		21,853			29,111		2,258,697		2,287,808
Home equity loans		46		18		552			616		50,520		51,136
Home equity lines of credit		1,123		331		2,144			3,598		336,891		340,489
Installment		85		14		77			176		5,719		5,895
Total	$	7,262		3,831		28,128			39,221		2,869,588		2,908,809
New York and other states:
	31-Dec-12
(dollars in thousands)		30-59		60-89		90	+	Total
	Days		Days		Days			30+ days				Total
	Past Due		Past Due		Past Due			Past Due		Current		Loans
Commercial:
Commercial real estate	$	-		-		3,225			3,225		164,024		167,249
Other		-		-		4			4		33,377		33,381
Real estate mortgage - 1 to 4 family:
First mortgages		6,364		2,248		21,341			29,953		1,784,261		1,814,214
Home equity loans		177		216		464			857		34,744		35,601
Home equity lines of credit		604		350		3,044			3,998		297,340		301,338
Installment		40		27		-			67		4,116		4,183
Total	$	7,185		2,841		28,078			38,104		2,317,862		2,355,966
Florida:
(dollars in thousands)		30-59		60-89		90	+	Total
	Days		Days		Days			30+ days				Total
	Past Due		Past Due		Past Due			Past Due		Current		Loans
Commercial:
Commercial real estate	$	-		-		2,698			2,698		16,184		18,882
Other		-		-		-			-		65		65
Real estate mortgage - 1 to 4 family:
First mortgages		862		452		5,390			6,704		269,060		275,764
Home equity loans		-		-		-			-		1,089		1,089
Home equity lines of credit		59		29		442			530		32,041		32,571
Installment		9		-		1			10		386		396
Total	$	930		481		8,531			9,942		318,825		328,767
Total:
(dollars in thousands)		30-59		60-89		90	+	Total
	Days		Days		Days			30+ days				Total
	Past Due		Past Due		Past Due			Past Due		Current		Loans
Commercial:
Commercial real estate	$	-		-		5,923			5,923		180,208		186,131
Other		-		-		4			4		33,442		33,446
Real estate mortgage - 1 to 4 family:
First mortgages		7,226		2,700		26,731			36,657		2,053,321		2,089,978
Home equity loans		177		216		464			857		35,833		36,690
Home equity lines of credit		663		379		3,486			4,528		329,381		333,909
Installment		49		27		1			77		4,502		4,579
Total	$	8,115		3,322		36,609			48,046		2,636,687		2,684,733
At December 31, 2013 and 2012, there were no loans that are 90 days past due and still accruing interest. As a result, non-accrual loans includes all loans 90 days past due and greater as well as certain loans less than 90 days past due that were placed in non-accruing status for reasons other than delinquent status. There are no commitments to extend further credit on nonaccrual or restructured loans.
Activity in the allowance for loan losses by portfolio segment is summarized as follows:
(dollars in thousands)	For the year ended December 31, 2013
			Real Estate
			Mortgage-
	Commercial		1 to 4 Family		Installment			Total
Balance at beginning of period	$	3,771		44,069		87			47,927
Loans charged off:
New York and other states*		1,072		6,572		68			7,712
Florida		100		1,020		6			1,126
Total loan chargeoffs		1,172		7,592		74			8,838
Recoveries of loans previously charged off:
New York and other states*		14		715		17			746
Florida		505		374		-			879
Total recoveries		519		1,089		17			1,625
Net loans charged off		653		6,503		57			7,213
Provision for loan losses		901		6,031		68			7,000
Balance at end of period	$	4,019		43,597		98			47,714
(dollars in thousands)	For the year ended December 31, 2012
			Real Estate
			Mortgage-
	Commercial		1 to 4 Family		Installment			Total
Balance at beginning of period	$	4,140		44,479		98			48,717
Loans charged off:
New York and other states*		1,307		6,919		128			8,354
Florida		1,192		3,920		13			5,125
Total loan chargeoffs		2,499		10,839		141			13,479
Recoveries of loans previously charged off:
New York and other states*		112		375		49			536
Florida		26		127		-			153
Total recoveries		138		502		49			689
Net loans charged off		2,361		10,337		92			12,790
Provision for loan losses		1,992		9,927		81			12,000
Balance at end of period	$	3,771		44,069		87			47,927
(dollars in thousands)	For the year ended December 31, 2011
			Real Estate
			Mortgage-
	Commercial		1 to 4 Family		Installment			Total
Balance at beginning of period	$	4,228		37,447		236			41,911
Loans charged off:
New York and other states*		171		4,315		80			4,566
Florida		1,000		6,990		2			7,992
Total loan chargeoffs		1,171		11,305		82			12,558
Recoveries of loans previously charged off:
New York and other states*		55		477		43			575
Florida		4		34		1			39
Total recoveries		59		511		44			614
Net loans charged off		1,112		10,794		38			11,944
Provision for loan losses		1,024		17,826		(100	)		18,750
Balance at end of period	$	4,140		44,479		98			48,717
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 December 31, 2013 and 2012:
	31-Dec-13
			1-to-4 Family
	Commercial Loans		Residential Real Estate		Installment Loans			Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	-		-		-			-
Collectively evaluated for impairment		4,019		43,597		98			47,714
Total ending allowance balance	$	4,019		43,597		98			47,714
Loans:
Individually evaluated for impairment	$	8,082		21,258		-			29,340
Collectively evaluated for impairment		215,399		2,658,175		5,895			2,879,469
Total ending loans balance	$	223,481		2,679,433		5,895			2,908,809
	31-Dec-12
			1-to-4 Family
	Commercial Loans		Residential Real Estate		Installment Loans			Total
Allowance for loan losses:
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$	-		-		-			-
Collectively evaluated for impairment		3,771		44,069		87			47,927
Total ending allowance balance	$	3,771		44,069		87			47,927
Individually evaluated for impairment	$	9,333		16,740		-			26,073
Collectively evaluated for impairment		210,244		2,443,837		4,579			2,658,660
Total ending loans balance	$	219,577		2,460,577		4,579			2,684,733
The Company did not acquire any loans with deteriorated credit quality in 2013 and 2012.
The Company has identified nonaccrual commercial and commercial real estate loans, as well as all loans restructured under a troubled debt restructuring (TDR), as impaired loans. A loan is considered impaired when it is probable that the borrower will be unable to repay the loan according to the original contractual terms of the loan agreement or the loan is restructured in a TDR.
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 December 31, 2013 and 2012 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 December 31, 2013, 2012 and 2011:
New York and other states:
	31-Dec-13
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	6,620		8,039		-			6,013
Other		332		332		-			165
Real estate mortgage - 1 to 4 family:
First mortgages		16,257		17,353		-			14,706
Home equity loans		561		614		-			636
Home equity lines of credit		2,528		2,825		-			2,051
Total	$	26,298		29,163		-			23,571
Florida:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	1,130		1,130		-			1,401
Other		-		-		-			-
Real estate mortgage - 1 to 4 family:
First mortgages		1,630		1,922		-			1,611
Home equity loans		-		-		-			-
Home equity lines of credit		282		380		-			100
Total	$	3,042		3,432		-			3,112
Total:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	7,750		9,169		-			7,414
Other		332		332		-			165
Real estate mortgage - 1 to 4 family:
First mortgages		17,887		19,275		-			16,317
Home equity loans		561		614		-			636
Home equity lines of credit		2,810		3,205		-			2,151
Total	$	29,340		32,595		-			26,683
New York and other states:
	31-Dec-12
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	6,511		7,169		-			5,615
Other		124		124		-			107
Real estate mortgage - 1 to 4 family:
First mortgages		12,964		14,143		-			6,075
Home equity loans		623		664		-			260
Home equity lines of credit		1,633		1,735		-			458
Total	$	21,855		23,835		-			12,515
Florida:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	2,698		3,890		-			5,871
Other		-		-		-			-
Real estate mortgage - 1 to 4 family:
First mortgages		1,472		2,665		-			948
Home equity lines of credit		48		176		-			24
Total	$	4,218		6,731		-			6,843
Total:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	9,209		11,059		-			11,486
Other		124		124		-			107
Real estate mortgage - 1 to 4 family:
First mortgages		14,436		16,808		-			7,023
Home equity loans		623		664		-			260
Home equity lines of credit		1,681		1,911		-			482
Total	$	26,073		30,566		-			19,358
New York and other states:
	31-Dec-11
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	4,968		5,684		-			5,198
Other		13		32		-			56
Real estate mortgage - 1 to 4 family:
First mortgages		2,874		3,299		-			1,664
Home equity loans		151		199		-			69
Home equity lines of credit		-		75		-			-
Total	$	8,006		9,289		-			6,987
Florida:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	5,000		9,042		-			6,774
Other		-		-		-			-
Real estate mortgage - 1 to 4 family:
First mortgages		705		1,301		-			224
Total	$	5,705		10,343		-			6,998
Total:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	9,968		14,726		-			11,972
Other		13		32		-			56
Real estate mortgage - 1 to 4 family:
First mortgages		3,579		4,600		-			1,888
Home equity loans		151		199		-			69
Home equity lines of credit		-		75		-			-
Total	$	13,711		19,632		-			13,985
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 in 2013, 2012, and 2011.
In response to the OCC interpretation that was issued in the third quarter of 2012, regarding borrowers who have filed Chapter 7 bankruptcy and did not re-affirm their debt with the Company, the Company classified $10.1 million of previously performing 1-4 family real estate mortgage loans as troubled debt restructurings (“TDR’s”) as of September 30, 2012. Included in the $10.1 million, were $4.0 million of loans that were reclassified from performing status to non-accrual status due to a collateral deficiency of $804 thousand. The collateral deficiency was charged off during the third quarter of 2012.
Included in impaired loans as of December 31, 2013 are approximately $8.6 million of 1 to 4 family residential real estate loans in accruing status that were identified as TDR’s in accordance with OCC guidance released in the third quarter of 2012.
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 December 31, 2013 and 2012, 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 modified loans by class that were determined to be TDR’s that occurred during the years ended December 31, 2013, 2012 and 2011:
	Year ended 12/31/2013							Year ended 12/31/2012						Year ended 12/31/2011
New York and other states*:			Pre-Modification		Post-Modification					Pre-Modification		Post-Modification				Pre-Modification		Post-Modification
			Outstanding		Outstanding					Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded			Number of		Recorded		Recorded		Number of		Recorded		Recorded
(dollars in thousands)	Contracts		Investment		Investment			Contracts		Investment		Investment		Contracts		Investment		Investment
Commercial:
Commercial real estate		1	$	507		507			2	$	138		138		1	$	91		90
Real estate mortgage - 1 to 4 family:
First mortgages		50		5,852		5,852			95		10,636		10,636		21		2,758		2,518
Home equity loans		7		120		120			16		488		488		4		160		151
Home equity lines of credit		13		1,061		1,061			30		1,633		1,633		-		-		-
Total		71	$	7,540		7,540			143	$	12,895		12,895		26	$	3,009		2,759
Florida:			Pre-Modification		Post-Modification					Pre-Modification		Post-Modification				Pre-Modification		Post-Modification
			Outstanding		Outstanding					Outstanding		Outstanding				Outstanding		Outstanding
	Number of		Recorded		Recorded			Number of		Recorded		Recorded		Number of		Recorded		Recorded
(dollars in thousands)	Contracts		Investment		Investment			Contracts		Investment		Investment		Contracts		Investment		Investment
Commercial:
Commercial real estate		-	$	-		-			-	$	-		-		-	$	-		-
Real estate mortgage - 1 to 4 family:
First mortgages		8		1,149		1,149			12		1,265		1,265		6		852		705
Home equity lines of credit		3		282		282			2		48		48		-		-		-
Total		11	$	1,431		1,431			14	$	1,313		1,313		6	$	852		705
The addition of these TDR’s did not have a significant impact on the allowance for loan losses.  As previously noted, included in loans modified and classified as TDR’s during the year ended December 31, 2012 are approximately $10.6 million of 1 to 4 family residential real estate loans that were determined to be TDR’s in accordance with OCC guidance released in the third quarter of 2012.
The following table presents loans by class modified as TDR’s that occurred during the years ended December 31, 2013, 2012 and 2011 for which there was a payment default during the same period:
	Year ended 12/31/2013				Year ended 12/31/2012					Year ended 12/31/2011
New York and other states*:	Number of		Recorded		Number of			Recorded		Number of		Recorded
(dollars in thousands)	Contracts		Investment		Contracts			Investment		Contracts		Investment
Commercial:
Commercial real estate		-	$	-		-		$	-		1	$	90
Real estate mortgage - 1 to 4 family:
First mortgages		5		440		22			2,265		13		1,729
Home equity loans		1		44		2			13		3		113
Home equity lines of credit		1		56		5			209		-		-
Total		7	$	540		29		$	2,487		17	$	1,932
Florida:
	Number of		Recorded		Number of			Recorded		Number of		Recorded
(dollars in thousands)	Contracts		Investment		Contracts			Investment		Contracts		Investment
Real estate mortgage - 1 to 4 family:
First mortgages		-	$	-		6		$	605		6	$	705
Home equity lines of credit		-		-		1			47		-		-
Total		-	$	-		7		$	652		6	$	705
In situations where the Bank 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 TDR’s that subsequently defaulted described above did not have a material impact on the allowance for loan losses as the underlying collateral was evaluated at the time these loans were identified as TDR’s, and a charge-off was taken at that time, if necessary. Collateral values on these loans, as well as all nonaccrual loans, are reviewed for collateral sufficiency on a quarterly basis.
The Company categorizes 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 over $150 thousand, such as commercial and commercial real estate loans, individually by grading the loans based on credit risk. In addition, the Company’s internal loan review department reviews non-homogeneous loans over $250 thousand by testing the loan grades assigned through the Company’s grading process.  The Company uses the following definitions for classified loans:
Special Mention: Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the Company’s credit position at some future date.
Substandard: Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected.
Doubtful: Loans classified as doubtful have all the weaknesses inherent in those loans classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. All doubtful loans are considered impaired.
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 December 31, 2013 and 2012, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows:
	31-Dec-13
New York and other states:
(dollars in thousands)
	Pass		Classified		Total
Commercial:
Commercial real estate	$	159,024		10,698		169,722
Other		31,691		632		32,323
	$	190,715		11,330		202,045
Florida:
(dollars in thousands)
	Pass		Classified		Total
Commercial:
Commercial real estate	$	20,274		1,130		21,404
Other		32		-		32
	$	20,306		1,130		21,436
	31-Dec-12
New York and other states:
(dollars in thousands)
	Pass		Classified		Total
Commercial:
Commercial real estate	$	155,981		11,268		167,249
Other		33,067		314		33,381
	$	189,048		11,582		200,630
Florida:
(dollars in thousands)
	Pass		Classified		Total
Commercial:
Commercial real estate	$	12,454		6,428		18,882
Other		65		-		65
	$	12,519		6,428		18,947
Included in classified loans in the above tables are impaired loans of $8.1 million and $9.3 million at December 31, 2013 and 2012, 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 Bank’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 at December 31, 2013 and 2012 is included in the aging of the recorded investment of past due loans table. In addition, the total nonperforming portion of these homogeneous loan pools at December 31, 2013 and 2012 is presented in the recorded investment in non-accrual loans table.

Bank_Premises_and_Equipment

Bank Premises and Equipment	12 Months Ended
	Dec. 31, 2013
Bank Premises and Equipment [Abstract]	'
Bank Premises and Equipment	'
	(5) Bank Premises and Equipment
	A summary of premises and equipment at December 31, 2013 and 2012 follows:
	(dollars in thousands)
		2013			2012
	Land	$	2,413			2,413
	Buildings		30,010			29,584
	Furniture, Fixtures and equipment		43,697			42,636
	Leasehold improvements		25,391			24,070
	Total bank premises and Equipment		101,511			98,703
	Accumulated depreciation and amortization		(67,097	)		(62,464	)
	Total	$	34,414			36,239
	Depreciation and amortization expense approximated $5.0 million, $5.0 million, and $4.8 million for the years 2013, 2012, and 2011, respectively. Occupancy expense of the Bank’s premises included rental expense of $7.2 million in 2013, $6.9 million in 2012, and $6.8 million in 2011.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2013
Deposits [Abstract]	'
Deposits	'
	(6) Deposits
	Interest expense on deposits was as follows:
	(dollars in thousands)	For the year ended December 31,
		2013		2012		2011
	Interest bearing checking accounts	$	329		315		285
	Savings accounts		3,333		3,872		3,788
	Time deposits and money market accounts		10,138		14,313		20,597
	Total	$	13,800		18,500		24,670
	At December 31, 2013, the maturity of total time deposits is as follows:
	(dollars in thousands)
	Under 1 year	$	923,033
	1 to 2 years		141,394
	2 to 3 years		57,431
	3 to 4 years		4,712
	4 to 5 years		4,353
	Over 5 years		125
		$	1,131,048

ShortTerm_Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2013
Short-Term Borrowings [Abstract]	'
Short-Term Borrowings	'
	(7) Short-Term Borrowings
	Short-term borrowings of the Company were cash management accounts as follows:
	(dollars in thousands)	2013			2012		2011
	Amount outstanding at December 31,	$	204,162			159,846		147,563
	Maximum amount outstanding at any month end		204,162			166,374		148,002
	Average amount outstanding		180,275			152,982		133,803
	Weighted average interest rate:
	For the year		0.82	%		0.96		1.18
	As of year end		0.82			0.89		1.13
	Cash management accounts represent retail accounts with customers for which the Bank has pledged certain assets as collateral.
	Trustco Bank also has an available line of credit with the Federal Home Loan Bank of New York which approximates the balance of securities pledged against such borrowings. The line of credit requires securities to be pledged as collateral for the amount borrowed. As of December 31, 2013 and 2012, the Company had no outstanding borrowings with the Federal Home Loan Bank of New York and, as a result, there were no related securities pledged.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Income Taxes	'
	(8) Income Taxes
	A summary of income tax expense/(benefit) included in the Consolidated Statements of Income follows:
	(dollars in thousands)	For the year ended
		December 31,
		2013			2012			2011
	Current tax expense:
	Federal	$	22,612			19,122			19,614
	State		2,531			1,879			2,020
	Total current tax expense		25,143			21,001			21,634
	Deferred tax expense (benefit)		(1,426	)		1,440			(2,336	)
	Total income tax expense	$	23,717			22,441			19,298
	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2013 and 2012, are as follows:
		December 31,
	(dollars in thousands)	2013			2012
		Deductible			Deductible
		temporary			temporary
		differences			differences
	Benefits and deferred remuneration	$	(4,256	)		(4,736	)
	Difference in reporting the allowance for loan losses, net		22,774			22,710
	Other income or expense not yet reported for tax purposes		3,008			2,582
	Depreciable assets		(1,309	)		(1,413	)
	Other items		1,153			801
	Net deferred tax asset at end of year		21,370			19,944
	Net deferred tax asset at beginning of year		19,944			21,384
	Deferred tax expense (benefit)	$	(1,426	)		1,440
	Deferred tax assets are recognized subject to management’s judgment that realization is more likely than not. Based primarily on the sufficiency of historical and expected future taxable income, management believes it is more likely than not that the remaining deferred tax asset of $21.4 million and $19.9 million at December 31, 2013 and 2012, respectively, will be realized.
	In addition to the deferred tax items described in the preceding table, the Company has a deferred tax asset of $12.0 million and a deferred tax liability of $2.5 million at December 31, 2013 and 2012, respectively, relating to the net unrealized gains and losses on securities available for sale and a deferred tax liability of $2.8 million and a deferred tax asset of $1.5 million at December 31, 2013 and 2012, respectively, as a result of the previously unrecognized overfunded position in the Company’s pension and postretirement benefit plans recorded, net of tax, as an adjustment to accumulated other comprehensive income.
	The effective tax rates differ from the statutory federal income tax rate. The reasons for these differences are as follows:
		For the years ended
		December 31,
		2013			2012			2011
	Statutory federal income tax rate		35	%		35			35
	Increase/(decrease) in taxes resulting from:
	Tax exempt income		(0.3	)		(0.7	)		(1.6	)
	State income tax (including alternative minimum tax), net of federal tax benefit		2.3			2.3			2
	Other items		0.3			0.8			1.4
	Effective income tax rate		37.3	%		37.4			36.8
	TrustCo adopted ASC 740-10, “Accounting for Uncertainty in Income Taxes,” as of January 1, 2008. ASC 740-10 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken on a tax return. As a result of the Company’s adoption of ASC 740-10, there were no required adjustments to the Company’s consolidated financial statements.
	During 2012 a part of the statute of limitations expired on previously filed amended returns.  The Company has determined that the tax positions claimed on amended returns are more likely than not to be sustained upon examination.  The Company has appropriately recorded the remaining portion of such unrecognized tax benefit as of December 31, 2012.
	For the years ended December 31, 2013 and 2012 the unrecognized tax benefits and change in those unrecognized tax benefits from the beginning of the year are as follows:
	(dollars in thousands)
	Balance January 1, 2012	$	905
	Decrease in prior unrecognized tax benefits		(342	)
	Lapse of statute of limitations		(350	)
	Balance December 31, 2012	$	213
	Change in unrecognized tax reserve		-
	Balance December 31, 2013	$	213
	TrustCo has implemented certain tax return positions that have not been fully recognized for financial statement purposes based upon management’s evaluation of the probability of the benefit being realized. Management will reevaluate the necessity of these unrecognized tax benefits after the affected tax returns have been subject to audit. The Company does not anticipate a material charge to the amount of unrecognized tax benefits in the next twelve months.
	The Company recognizes interest and/or penalties related to income tax matters in noninterest expense. For 2013, 2012, and 2011, these amounts were not material. Open Federal and New York State tax years are 2008 through 2013.

Benefit_Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2013
Benefit Plans [Abstract]	'
Benefit Plans	'
	(9) Benefit Plans
	(a) Retirement Plan
	The Company maintains a trusteed non-contributory pension plan covering employees that have completed one year of employment and 1,000 hours of service. The benefits are based on the sum of (a) a benefit equal to a prior service benefit plus the average of the employees’ highest five consecutive years’ compensation in the ten years preceding retirement multiplied by a percentage of service after a specified date plus (b) a benefit based upon career average compensation. The amounts contributed to the plan are determined annually on the basis of (a) the maximum amount that can be deducted for federal income tax purposes or (b) the amount certified by a consulting actuary as necessary to avoid an accumulated funding deficiency as defined by the Employee Retirement Income Security Act of 1974. Contributions are intended to provide for benefits attributed to service to date. Assets of the plan are administered by Trustco Bank’s Financial Services Department. This plan was frozen as of December 31, 2006. The following tables set forth the plan’s funded (unfunded) status and amounts recognized in the Company’s consolidated statements of condition at December 31, 2013 and 2012.
	Change in Projected Benefit Obligation:	December 31,
	(dollars in thousands)	2013			2012
	Projected benefit obligation at beginning of year	$	31,990			29,283
	Service cost		69			55
	Interest cost		1,273			1,426
	Benefits paid		(2,045	)		(2,036	)
	Net actuarial loss (gain)		(3,465	)		3,262
	Projected benefit obligation at end of year	$	27,822			31,990
	Change in Plan Assets and Reconciliation of Funded Status:	December 31,
	(dollars in thousands)		2013			2012
	Fair Value of plan assets at beginning of year	$	34,584			30,278
	Actual gain on plan assets		6,880			3,342
	Company contributions		-			3,000
	Benefits paid		(2,045	)		(2,036	)
	Fair value of plan assets at end of year		39,419			34,584
	Funded status at end of year	$	11,597			2,593
	Amounts recognized in accumulated other comprehensive income consist of the following as of:
		December 31,
		2013			2012
	Net actuarial loss	$	813			9,486
	Components of Net Periodic Pension Income and Other Amounts Recognized in Other Comprehensive Income:
	(dollars in thousands)	For the years ended
		December 31,
		2013			2012				2011
	Service cost	$	69			55				45
	Interest cost		1,273			1,426				1,515
	Expected return on plan assets		(2,190	)		(1,912	)			(1,985	)
	Amortization of net actuarial loss		516			335				156
	Net periodic pension income		(332	)		(96	)			(269	)
	Amortization of net actuarial loss		(516	)		(335	)			(156	)
	Net actuarial (gain) / loss included in other comprehensive income		(8,156	)		1,834				3,689
			(8,672	)		1,499				3,533
	Total recognized in net periodic pension income and other comprehensive income	$	(9,004	)		1,401				3,264
	The estimated net loss for the plan that will be amortized from accumulated other comprehensive income into net periodic pension cost over the next fiscal year is zero.
	Estimated Future Benefit Payments
	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid:
	(dollars in thousands)
	Year	Pension Benefits
	2014	$	1,698
	2015		1,720
	2016		1,750
	2017		1,757
	2018		1,780
	2019 - 2023		9,141
	The assumptions used to determine benefit obligations at December 31 are as follows:
		2013			2012				2011
	Discount rate		5.08	%		4.07				5.17
	The assumptions used to determine net periodic pension expense for the years ended December 31 are as follows:
		2013			2012				2011
	Discount rate		4.07	%		5.17				5.62
	Expected long-term rate of return on assets		6.5			6.5				6.5
	The annual rate assumption used for purposes of computing the service and interest costs components is determined based upon factors including the yields on high quality corporate bonds and other appropriate yield curves along with analysis prepared by the Company’s actuaries.
	The Company also has a supplementary pension plan under which additional retirement benefits are accrued for eligible executive officers. This plan supplements the defined benefit retirement plan for eligible employees that exceed the Internal Revenue Service limit on the amount of pension payments that are allowed from a retirement plan. The supplemental plan provides eligible employees with total benefit payments as calculated by the retirement plan without regard to this limitation. Benefits under this plan are calculated using the same actuarial assumptions and interest rates as used for the retirement plan calculations. The accumulated benefits under this supplementary pension plan was approximately $5.6 million as of December 31, 2013 and 2012, respectively. Effective as of December 31, 2008, this plan has been frozen and no additional benefits will accrue. Instead, the amount of the Company’s annual contribution to the plan plus interest is paid directly to each eligible employee. The expense recorded for this plan was $1.3 million, $823 thousand, and $647 thousand, in 2013, 2012, and 2011, respectively.
	Rabbi trusts have been established for certain benefit plans. These trust accounts are administered by the Trustco Financial Services Department and invest primarily in bonds issued by government-sponsored enterprises and money market instruments. These assets are recorded at their fair value and are included in securities available for sale and other short-term investments in the Consolidated Statements of Condition. As of both December 31, 2013 and 2012, the trusts had assets totaling $5.7 million.
	(b) Postretirement Benefits
	The Company permits retirees under age 65 to participate in the Company’s medical plan by making certain payments. At age 65, the Bank provides a Medicare Supplemental program to retirees.
	In 2003, the Company amended the medical plan to reflect changes to the retiree medical insurance coverage portion. The Company’s subsidy of the retiree medical insurance premiums was eliminated. The Company continues to provide postretirement medical benefits for a limited number of executives in accordance with their employment contracts.
	The following tables show the plan’s funded status and amounts recognized in the Company’s Consolidated Statements of Condition at December 31, 2013 and 2012:
	Change in Accumulated Benefit Obligation:	December 31,
	(dollars in thousands)	2013			2012
Accumulated benefit obligation at beginning of year	$	2,413			2,008
Service cost		50			33
Interest cost		101			97
Plan amendments		465			-
Benefits paid		(60	)		(48	)
Net actuarial (gain) loss		(456	)		323
Accumulated benefit obligation at end of year	$	2,513			2,413
The $465 thousand plan amendment included in the above table is due to an additional executive becoming eligible for postretirement medical benefits during 2013.
Change in Plan Assets and Reconciliation of Funded Status:	December 31,
(dollars in thousands)	2013			2012
Fair value of plan assets at beginning of year	$	15,026			13,662
Actual gain on plan assets		2,909			1,364
Company contributions		60			48
Benefits paid		(60	)		(48	)
Fair value of plan assets at end of year		17,935			15,026
Funded status at end of year	$	15,422			12,613
	December 31,
Amounts recognized in accumulated other comprehensive income consist of the following as of:	2013			2012
Net actuarial gain	$	(4,945	)		(2,125	)
Prior service credit		(2,979	)		(3,706	)
Total	$	(7,924	)		(5,831	)
Components of Net Periodic Benefit Income and Other Amounts Recognized in Other Comprehensive Income:
	For the years ended
	December 31,
(dollars in thousands)	2013			2012				2011
Service cost	$	50			33				26
Interest cost		101			97				98
Expected return on plan assets		(495	)		(451	)			(447	)
Amortization of net actuarial gain		(49	)		(29	)			(71	)
Amortization of prior service credit		(262	)		(262	)			(262	)
Net periodic benefit income		(655	)		(612	)			(656	)
Net (gain) loss		(2,868	)		(590	)			531
Prior service cost		465			-				533
Amortization of prior service credit		262			262				262
Amortization of net actuarial gain		49			29				71
Total amount recognized in other comprehensive income		(2,092	)		(299	)			1,397
Total amount recognized in net periodic benefit income and other comprehensive income	$	(2,747	)		(911	)			741
The estimated amount that will be amortized from accumulated other comprehensive income into net periodic benefit credit over the next fiscal year is approximately $468 thousand.
Expected Future Benefit Payments
The following benefit payments are expected to be paid:
Year	Postretirement Benefits
2014	$	56
2015		59
2016		62
2017		65
2018		70
2019 - 2023		510
The discount rate assumption used to determine benefit obligations at December 31 is as follows:
	2013			2012				2011
Discount rate		5.08	%		4.07				5.17
The assumptions used to determine net periodic pension benefit (credit) for the years ended December 31 are as follows:
	2013			2012				2011
Discount rate		4.07	%		5.17				5.62
Expected long-term rate of return on assets, net of tax		3.3			3.3				3.3
The annual rate assumption used for purposes of computing the service and interest costs components is determined based upon factors including the yields on high quality corporate bonds and other appropriate yield curves along with analysis prepared by the Company’s actuaries.
For measurement purposes, a graded annual rate of increase in the per capita cost of covered benefits (i.e., health care cost trend rate) was assumed for 2013 and thereafter. A one percentage point increase in the assumed health care cost in each year would have an approximate $500 thousand impact on the accumulated postretirement benefit obligation as of December 31, 2013, while a 1% decrease would have an approximate $389 thousand impact. The impact on the interest and service components of net periodic postretirement benefit credit for the year ended December 31, 2013 would be $32 thousand for a one percentage point increase and $24 thousand for a one percentage point decrease.
(c) Components of Accumulated Other Comprehensive Income (Loss) Related to Retirement and Postretirement Benefit Plans
The following table details the change in the components of other comprehensive income related to the retirement plan and the post-retirement benefit plan, at December 31, 2013 and 2012, respectively:
(dollars in thousands)
	31-Dec-13
				Post-
	Retirement			Retirement
	Plan			Benefit Plan				Total
Change in overfunded position of pension and postretirement benefits	$	(8,156	)		(2,403	)			(10,559	)
Amortization of net actuarial gain (loss)		(516	)		49				(467	)
Amortization of
prior service credit		-			262				262
Total	$	(8,672	)		(2,092	)			(10,764	)
	31-Dec-12
				Post-
	Retirement			Retirement
	Plan			Benefit Plan				Total
Change in overfunded position of pension and postretirement benefits	$	1,834			(590	)			1,244
Amortization of net actuarial gain (loss)		(335	)		29				(306	)
Amortization of prior service credit		-			262				262
Total	$	1,499			(299	)			1,200
(d) Major Categories of Pension and Postretirement Benefit Plan Assets:
The asset allocations of the Company’s pension and postretirement benefit plans at December 31, were as follows:
	Pension Benefit							Postretirement Benefit
	Plan Assets							Plan Assets
	2013			2012				2013				2012
Debt Securities		26	%		29				27				28
Equity Securities		69			65				68				64
Other		5			6				5				8
Total		100	%		100				100				100
The expected long-term rate-of-return on plan assets, noted in sections (a) and (b) above, reflects long-term earnings expectations on existing plan assets. In estimating that rate, appropriate consideration was given to historical returns earned by plan assets and the rates of return expected to be available for reinvestment. Rates of return were adjusted to reflect current capital market assumptions and changes in investment allocations.
The Company’s investment policies and strategies for the pension benefit and postretirement benefit plans prescribe a target allocation of 50% to 70% equity securities, 25% to 40% debt securities, and 0% to 10% for other securities for the asset categories. The Company’s investment goals are to maximize returns subject to specific risk management policies. Its risk management policies permit direct investments in equity and debt securities and mutual funds while prohibiting direct investment in derivative financial instruments. The Company addresses diversification by the use of mutual fund investments whose underlying investments are in domestic and international debt and equity securities. These mutual funds are readily marketable and can be sold to fund benefit payment obligations as they become payable.
Fair Value of Plan Assets:
Fair value is the exchange price that would be received for an asset in the principal or most advantageous market for the asset in an orderly transaction between market participants on the measurement date.
The Company used the following methods and significant assumptions to estimate the fair value of each type of financial instrument:
Equity mutual funds, Fixed Income mutual funds and Debt Securities: The fair values for investment securities are determined by quoted market prices, if available (Level 1). For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2).
The fair value of the plan assets at December 31, 2013 and 2012, by asset category, is as follows:
Retirement Plan				Fair Value Measurements at
				December 31, 2013 Using:
								Significant
				Quoted Prices in				Other				Significant
				Active Markets for				Observable				Unobservable
	Carrying			Identical Assets				Inputs				Inputs
	Value			(Level 1)				(Level 2)				(Level 3)
(Dollars in thousands)
Plan Assets
Cash and cash equivalents	$	1,916			1,916				-				-
Equity mutual funds		27,296			27,296				-				-
U.S. government sponsored enterprises		5,091			-				5,091				-
Corporate bonds		4,517			-				4,517				-
Fixed income mutual funds		599			599				-				-
Total Plan Assets	$	39,419			29,811				9,608				-
Postretirement Benefits				Fair Value Measurements at
				December 31, 2013 Using:
								Significant
				Quoted Prices in				Other				Significant
				Active Markets for				Observable				Unobservable
	Carrying			Identical Assets				Inputs				Inputs
	Value			(Level 1)				(Level 2)				(Level 3)
(Dollars in thousands)
Plan Assets
Cash and cash equivalents	$	950			950				-				-
Equity mutual funds		12,135			12,135				-				-
U.S. government sponsored enterprises		1,020			-				1,020				-
Corporate bonds		449			-				449				-
State and political subdivisions		3,381			-				3,381				-
Total Plan Assets	$	17,935			13,085				4,850				-
Retirement Plan				Fair Value Measurements at
				December 31, 2012 Using:
								Significant
				Quoted Prices in				Other				Significant
				Active Markets for				Observable				Unobservable
	Carrying			Identical Assets				Inputs				Inputs
	Value			(Level 1)				(Level 2)				(Level 3)
(Dollars in thousands)
Plan Assets
Cash and cash equivalents	$	2,114			2,114				-				-
Equity mutual funds		22,599			22,599				-				-
U.S. government sponsored enterprises		4,574			-				4,574				-
Corporate bonds		4,626			-				4,626				-
Fixed income mutual funds		671			671				-				-
Total Plan Assets	$	34,584			25,384				9,200				-
Postretirement Benefits				Fair Value Measurements at
				December 31, 2012 Using:
								Significant
				Quoted Prices in				Other				Significant
				Active Markets for				Observable				Unobservable
	Carrying			Identical Assets				Inputs				Inputs
	Value			(Level 1)				(Level 2)				(Level 3)
(Dollars in thousands)
Plan Assets
Cash and cash equivalents	$	1,148			1,148				-				-
Equity mutual funds		9,718			9,718				-				-
State and political subdivisions		4,160			-				4,160				-
Total Plan Assets	$	15,026			10,866				4,160				-
At December 31, 2013 and 2012, the majority of the equity mutual funds included in the plan assets of the retirement plan and postretirement benefit plan consist of large-cap index funds, while the remainder of the equity mutual funds consists of mid-cap, small-cap and international funds.
There were no transfers between Level 1 and Level 2 in 2013 and 2012.
The Company made contributions of $3.0 million to its pension plan during 2012. No contributions were made in 2013.  The Company does not expect to make any contributions to its pension and postretirement benefit plans in 2014.
(e) Incentive and Bonus Plans
During 2006 the Company amended its profit sharing plan to include a 401(k) feature. Under the 401(k) feature the Company matches 100% of the aggregate salary contribution up to the first 3% of compensation and 50% of the aggregate contribution of the next 3%. No profit sharing contributions were made in 2013, 2012 or 2011 but were replaced with Company contributions to the 401(k) feature of the plan. Expenses related to the plan aggregated $657 thousand for 2013, $601 thousand in 2012 and $461 thousand in 2011.
The Company also has an officers and executive incentive plan. The expense of these plans generally are based on the Company’s performance and estimated distributions to participants are accrued during the year and generally paid in the following year. The expense recorded for this plan was $2.0 million, $1.6 million and $1.3 million in 2013, 2012 and 2011, respectively.
In prior years, the Company awarded 3.2 million performance bonus units to the executive officers and directors. These units become vested and exercisable only under a change of control as defined in the plan. The units were awarded based upon the stock price at the time of grant and, if exercised under a change of control, allow the holder to receive the increase in value offered in the exchange over the stock price at the date of grant for each unit, if any. As of December 31, 2013, the weighted average strike price of each unit was $7.95.
(f) Stock Based Compensation Plans-Equity Awards
Equity awards are types of stock based compensation that are to be settled in shares. As such, the amount of compensation expense to be paid at the time of settlement is included in surplus in the Consolidated Statement of Condition.
Under the 2010 TrustCo Bank Corp NY Stock Option Plan, the Company may grant stock options and restricted stock to its eligible employees for up to approximately 2.0 million shares of common stock. Under the 2004 TrustCo Bank Corp NY Stock Option Plan, the Company could have granted options to its eligible employees for up to approximately 2.0 million shares of common stock.
Under the 2010 Directors Stock Option Plan, the Company may grant stock options and restricted stock to its directors for up to approximately 250 thousand shares of its common stock. Under the 2004 Directors Stock Option Plan, the Company could have granted options to its directors for up to approximately 200 thousand shares of its common stock.
Under each of these plans, the exercise price of each option equals the fair value of the Company’s stock on the date of grant, and an option’s maximum term is ten years. Options vest over five years from the date the options are granted for the employees plans and they are immediately vested under the directors’ plans. A summary of the status of TrustCo’s stock option plans as of December 31, 2013 and changes during the year then ended, are as follows:
	Outstanding Options								Exercisable Options
							Weighted								Weighted
				Weighted			Average						Weighted		Average
				Average			Remaining						Average		Remaining
				Exercise			Contractual						Exercise		Contractual
	Shares			Price			Life		Shares				Price		Life
Balance, January 1, 2013		2,892,000		$	9.58					2,144,600			$	11.01
New options awarded-2013		281,500			7.05					-				0
Expired options - 2013		-			0					-				0
Cancelled options-2013		-			0					-				0
Exercised options - 2013		(14,700	)		5.15					(14,700	)			5.15
Options became exercisable		-			0					234,600				6.25
Balance, December 31, 2013		3,158,800		$	9.54		5.1 years			2,364,500			$	10.78	3.4 years
At December 31, 2013, the intrinsic value of outstanding stock options and vested stock options was approximately $1.2 million and $397 thousand, respectively. The Company expects all unvested options to vest according to plan provisions.
During 2013, 15 thousand stock options were exercised. The intrinsic value and related tax benefits of stock options exercised in 2013 was not material.  No stock options were exercised in 2012 or 2011. It is the Company’s policy to generally issue stock for stock option exercises from previously unissued shares of common stock or treasury shares.
Unrecognized stock-based compensation expense related to non-vested stock options totaled $600 thousand at December 31, 2013. At such date, the weighted-average period over which this unrecognized expense was expected to be recognized was 3.9 years.
Valuation of Stock-Based Compensation: The fair value of the Company’s employee and director stock options granted is estimated on the measurement date, which, for the Company, is the date of grant. The weighted-average fair value of stock options granted during 2013, 2012 and 2011 estimated using the Black-Scholes option pricing model, was $1.08, $0.76 and $0.98, respectively. The Company estimated expected market price volatility and the expected term of the options based on historical data and other factors. The assumptions used to determine the fair value of options granted during 2013, 2012 and 2011 are detailed in the table below:
	2013			2012
	Employees'			Employees'
	Plan			Plan
Expected dividend yield		3.72	%		5.08
Risk-free interest rate		1.45			0.8
Expected volatility rate		25.83			30.18
Expected lives	5.0 years			5.0 years
	2011
	Employees'			Directors'
	Plan			Plan
Expected dividend yield		5.11	%		5.11
Risk-free interest rate		1.9			1.59
Expected volatility rate		26.64			28.5
Expected lives		7.5 years			6.0 years
During 2011, the Company issued 99 thousand restricted common shares to certain eligible executive officers and another seven thousand restricted common shares to its board of directors. The restricted share awards hold the same voting powers as the Company’s common stock and become 100% vested after three years based upon a cliff-vesting schedule. The shares are also eligible to receive nonforfeitable dividend payments. The fair value of these awards was $5.14 per restricted share, the fair value of the Company’s common stock on the grant date. During 2013, 2012 and 2011, the Company recognized approximately $170 thousand, $170 thousand and $28 thousand in stock based compensation expense related to the employee awards, respectively.  In addition, the Company recognized approximately $12 thousand, $12 thousand and $2 thousand related to the director awards, respectively. Unrecognized stock-based compensation expense related to the outstanding restricted shares totaled $151 thousand, $333 thousand and $515 thousand at December 31, 2013, 2012 and 2011, respectively. At December 31, 2013, 2012 and 2011, all of the awards were unvested. The weighted average period over which the unrecognized expense is expected to be recognized was one year at December 31, 2013, two years as of December 31, 2012 and three years at December 31, 2011.
The 2013 activity for the restricted common shares was as follows:
Restricted common shares
				Weighted
				Average
	Shares			Price
Balance, December 31, 2012		106,000		$	5.14
New awards granted		-			0
Awards became vested		-			0
Balance, December 31, 2013		106,000		$	5.14
(g) Stock Based Compensation Plans-Liability Awards
Liability awards are types of stock based compensation that can be settled in cash (not shares). As such, the amount of compensation expense to be paid at the time of settlement is included in accrued expenses and other liabilities in the Consolidated Statement of Condition.  The Company granted both service based and performance based liability awards in 2013 and 2012.
The activity for service based awards during 2013 was as follows:
Restricted share units
				Weighted
				Average
	Units			Price
Balance, December 31, 2012		82,500		$	5.17
New awards granted		51,250			7.05
Awards became vested		-			0
Balance, December 31, 2013		133,750		$	5.89
Service Based Awards:  During 2013 and 2012, the Company issued restricted share units to certain eligible officers, executives and its board of directors. The restricted share units do not hold voting powers, nor are they eligible for common stock dividends, and become 100% vested after three years based upon a cliff-vesting schedule. Upon issuance, the fair value of these awards is the fair value of the Company’s common stock on the grant date. Thereafter, the amount of stock based compensation expense recognized, is based on the fair value of the Company’s stock. During 2013 and 2012, the Company recognized approximately $230 thousand and $23 thousand, respectively, in stock based compensation expense related to these awards.  Unrecognized stock-based compensation expense related to the outstanding restricted share units totaled $710 thousand at December 31, 2013. At December 31, 2013 all of the awards were unvested. The weighted average period over which the unrecognized expense is expected to be recognized was approximately 30 months as of December 31, 2013.
The liability related to service based liability awards totaled $253 thousand and $23 thousand at December 31, 2013 and 2012, respectively.
The activity for performance based awards during 2013 was as follows:
Performance share units
				Weighted
				Average
	Units			Price
Balance, December 31, 2012		65,000		$	5.17
New awards granted		81,500			7.05
Awards became vested		-			0
Balance, December 31, 2013		146,500		$	6.22
Performance Based Awards:  During 2013 and 2012, the Company issued performance share units to certain eligible officers and executives. These units do not hold voting powers, nor are they eligible for common stock dividends, and become 100% vested after three years based upon a cliff-vesting schedule. Upon issuance, fair value of these units was the fair value of the Company’s common stock on the grant date. Thereafter, the amount of stock based compensation expense recognized is based upon the Company’s achievement of certain performance criteria in accordance with Plan provisions as well as the fair value of the Company’s stock.
For units granted in 2012, the Company expects to exceed its required performance criteria and therefore has adjusted its calculation for the increased number of units that would be settled in cash upon vesting. For units granted in 2013, the Company expects to meet its required performance criteria.  During 2013 and 2012, the Company recognized approximately $239 thousand and $19 thousand, respectively, in stock based compensation expense related to these units. Unrecognized stock-based compensation expense related to the outstanding performance share units totaled $910 thousand at December 31, 2013. At December 31, 2013 all of the units were unvested. The weighted average period over which the unrecognized expense is expected to be recognized was approximately 30 months as of December 31, 2013.
The liability related to performance based liability awards totaled $258 thousand and $19 thousand at December 31, 2013 and 2012, respectively.
(h) Stock Based Compensation Expense
Stock-based compensation expense totaled $847 thousand, $447 thousand and $274 thousand in 2013, 2012 and 2011, respectively, related to the 2010 and 2004 TrustCo Bank Corp NY Stock Option Plans. In 2011, $13 thousand of stock-based compensation expense was recognized related to the 2010 Directors Stock Option Plan. No such expense was recorded in 2013 and 2012 as no stock options were granted to directors in those years.
Of the $847 thousand of stock based compensation expense recognized in 2013, $469 thousand related to liability awards as they may be settled in cash instead of shares, while the remaining $378 thousand related to equity awards.
Of the $447 thousand of stock based compensation expense recognized in 2012, $42 thousand related to liability awards as they may be settled in cash instead of shares, while the remaining $405 thousand related to equity awards.
Stock-based compensation expense is recognized ratably over the vesting period for all awards. Income tax benefits recognized in the accompanying consolidated statements of income related to stock-based compensation in 2013, 2012 and 2011 was approximately $296 thousand, $156 thousand and $100 thousand, respectively.

Commitments_and_Contingent_Lia

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2013
Commitments and Contingent Liabilities [Abstract]	'
Commitments and Contingent Liabilities	'
	(10) Commitments and Contingent Liabilities
	(a) Leases
	The Bank leases certain banking premises. These leases are accounted for as operating leases with minimum rental commitments in the amounts presented below. The majority of these leases contain options to renew.
	(dollars in thousands)
	2014	$	6,860
	2015		6,493
	2016		6,295
	2017		5,979
	2018		5,719
	2019 and after		42,429
		$	73,775
	(b) Litigation
	Existing litigation arising in the normal course of business is not expected to result in any material loss to the Company.
	(c) Outsourced Services
	The Company contracted with third-party service providers to perform certain banking functions beginning 2002. The outsourced services include data and item processing for the Bank and trust operations. The service expense can vary based upon volume and nature of transactions processed. Outsourced service expense was $5.1 million for 2013, 2012 and 2011. The Company is contractually obligated to pay these third-party service providers approximately $5 to $6 million per year through 2018.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	(11) 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 (“ASC 260”). TrustCo adopted FASB Staff Position on Emerging Issues Task Force 03-6-1, Determining Whether Instruments Granted in Share-Based Payment Transactions Are Participating Securities, as codified in FASB ASC 260-10 (“ASC 260-10”), which clarified that unvested share-based payment awards that contain nonforfeitable rights to receive dividends or divided equivalents (whether paid or unpaid) are participating securities, and thus, should be included in the two-class method of computing earnings per share (“EPS”). Participating securities under this statement include the unvested employees’ and directors’ restricted stock awards with time-based vesting, which receive nonforfeitable dividend payments.
	A reconciliation of the component parts of earnings per share for 2013, 2012 and 2011 follows:
	(dollars in thousands, except per share data)
		2013		2012		2011
	For the years ended December 31:
	Net income	$	39,812		37,534		33,087
	Less: Net income allocated to participating securities		45		43		5
	Net income allocated to common shareholders	$	39,767		37,491		33,082
	Basic EPS:
	Distributed earnings allocated to common stock	$	24,745		24,607		22,389
	Undistributed earnings allocated to common stock		15,022		12,884		10,693
	Net income allocated to common shareholders	$	39,767		37,491		33,082
	Weighted average common shares outstanding including participating securities		94,266		93,739		85,086
	Less: Participating securities		106		106		14
	Weighted average common shares		94,160		93,633		85,072
	Basic EPS	$	0.422		0.4		0.389
	Diluted EPS:
	Net income allocated to common shareholders	$	39,767		37,491		33,082
	Weighted average common shares for basic EPS		94,160		93,633		85,072
	Effect of Dilutive Securities:
	Stock Options		46		4		-
	Weighted average common shares including potential dilutive shares		94,206		93,637		85,072
	Diluted EPS	$	0.422		0.4		0.389
	As of December 31, 2013, 2012 and 2011, the weighted average number of antidilutive stock options excluded from diluted earnings per share was approximately 2.5 million, 2.9 million, and 2.8 million, respectively. 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.

OffBalance_Sheet_Financial_Ins

Off-Balance Sheet Financial Instruments	12 Months Ended
	Dec. 31, 2013
Off Balance Sheet Financial Instruments [Abstract]	'
Off-Balance Sheet Financial Instruments	'
	(12) Off-Balance Sheet Financial Instruments
	Loan commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require a fee. Commitments sometimes expire without being drawn upon. Therefore, the total commitment amounts do not necessarily represent future cash requirements. These arrangements have credit risk essentially the same as that involved in extending loans to customers and are subject to the Bank’s normal credit policies, including obtaining collateral. The Bank’s maximum exposure to credit loss for loan commitments, including unused lines of credit, at December 31, 2013 and 2012, was $430.3 million and $388.2 million, respectively. Approximately 79% and 84% of these commitments were for variable rate products at the end of 2013 and 2012, respectively.
	The Company does not issue any guarantees that require liability-recognition or disclosure, other than its standby letters of credit. The Company has issued conditional commitments in the form of standby letters of credit to guarantee payment on behalf of a customer and guarantee the performance of a customer to a third party. Standby letters of credit generally arise in connection with lending relationships. The credit risk involved in issuing these instruments is essentially the same as that involved in extending loans to customers. Contingent obligations under standby letters of credit totaled approximately $6.5 million and $5.6 million at December 31, 2013 and 2012, respectively, and represent the maximum potential future payments the Company could be required to make. Typically, these instruments have terms of 12 months or less and expire unused; therefore, the total amounts do not necessarily represent future cash requirements. Each customer is evaluated individually for creditworthiness under the same underwriting standards used for commitments to extend credit and on-balance sheet instruments. Company policies governing loan collateral apply to standby letters of credit at the time of credit extension. Loan-to-value ratios are generally consistent with loan-to-value requirements for other commercial loans secured by similar types of collateral. The fair value of the Company’s standby letters of credit at December 31, 2013and 2012 was insignificant.
	No losses are anticipated as a result of loan commitments or standby letters of credit.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2013
Fair Value of Financial Instruments [Abstract]	'
Fair Value of Financial Instruments	'
	(13) Fair Value of Financial Instruments
	Fair value measurements (ASC 820) defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820 also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair values:
	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 or 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: The fair value of securities available for sale 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 income statement in the respective investment class under total interest income. Also classified as available for sale securities are equity securities where fair value is determined by quoted market prices and these are designated as Level 1. The Company does not have any securities that would be designated as level 3.
	Other Real Estate Owned: Assets acquired through loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process to adjust for differences between the comparable sales and income data available. This results in a Level 3 classification of the inputs for determining fair value.
	Impaired Loans: At the time a loan is considered impaired, it is valued at the lower of cost or fair value. Impaired loans carried at fair value generally have had a chargeoff through the allowance for loan losses. For collateral dependent loans, fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process to adjust for differences between the comparable sales and income data available. Such adjustments may be significant and typically result in a Level 3 classification of the inputs for determining fair value. When obtained, non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted accordingly.
	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
		December 31, 2013 Using:
							Significant
				Quoted Prices in			Other			Significant
				Active Markets for			Observable			Unobservable
		Carrying		Identical Assets			Inputs			Inputs
		Value		(Level 1)			(Level 2)			(Level 3)
	(Dollars in thousands)
	Securities available-for sale:
	U.S. government-sponsored enterprises	$	198,829		-			198,829			-
	State and political subdivisions		7,758		-			7,758			-
	Mortgage-backed securities and collateralized mortgage obligations - residential		532,449		-			532,449			-
	Corporate bonds		10,471		-			10,471			-
	Small Business Administration-guaranteed participation securities		103,029		-			103,029			-
	Mortgage-backed securities and collateralized mortgage obligations - commercial		10,558		-			10,558			-
	Other securities		660		10			650			-
	Total securities available-for-sale	$	863,754		10			863,744			-
			Fair Value Measurements at
			December 31, 2012 Using:
							Significant
				Quoted Prices in			Other			Significant
				Active Markets for			Observable			Unobservable
		Carrying		Identical Assets			Inputs			Inputs
		Value		(Level 1)			(Level 2)			(Level 3)
	(Dollars in thousands)
	Securities available-for sale:
	U.S. government-sponsored enterprises	$	263,108		-			263,108			-
	State and political subdivisions		26,457		-			26,457			-
	Mortgage-backed securities and collateralized mortgage obligations - residential		518,776		-			518,776			-
	Corporate bonds		26,529		-			26,529			-
	Small Business Administration-guaranteed participation securities		76,562		-			76,562
	Other securities		660		10			650			-
	Total securities available-for-sale	$	912,092		10			912,082			-
	There were no transfers between Level 1 and Level 2 in 2013 and 2012.
	Assets measured at fair value on a non-recurring basis are summarized below:
		Fair Value Measurements at
		December 31, 2013 Using:
							Significant
				Quoted Prices in			Other			Significant
				Active Markets for			Observable			Unobservable
		Carrying		Identical Assets			Inputs			Inputs
		Value		(Level 1)			(Level 2)			(Level 3)
	(Dollars in thousands)
	Other real estate owned	$	8,729		-			-			8,729
	Impaired Loans:
	Commercial real estate		1,802		-			-			1,802
	Real estate mortgage - 1 to 4 family:
	First mortgages		2,425		-			-			2,425
	Home Equity Loans		48		-			-			48
	Home Equity Lines of Credit		810		-			-			810
		Fair Value Measurements at
		December 31, 2012 Using:
						Significant
			Quoted Prices in			Other			Significant
			Active Markets for			Observable			Unobservable
	Carrying		Identical Assets			Inputs			Inputs
	Value		(Level 1)			(Level 2)			(Level 3)
(Dollars in thousands)
Other real estate owned	$	8,705		-			-			8,705
Impaired Loans:
Commercial real estate		4,690		-			-			4,690
Real estate mortgage - 1 to 4 family:
First mortgages		5,421		-			-			5,421
Home Equity Loans		67		-			-			67
Home Equity Lines of Credit		581		-			-			581
Other real estate owned, which is carried at fair value less costs to sell, approximates $8.7 million at December 31, 2013 and consisted of $5.0 million of commercial real estate and $3.7 million of residential real estate properties. A valuation charge of $2.2 million is included in earnings for the year ended December 31, 2013.
Of the total impaired loans of $29.3 million at December 31, 2013, $5.1 million are collateral dependent and have had a chargeoff taken 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, 2013. Gross charge-offs related to commercial impaired loans included in the table above were $761 thousand for the year ended December 31, 2013, while gross charge-offs related to residential impaired loans included in the table above amounted to $534 thousand.
Other real estate owned, which is carried at fair value less costs to sell, approximates $8.7 million at December 31, 2012 and consisted of $4.8 million of commercial real estate and $3.9 million of residential real estate properties. A valuation charge of $1.1 million is included in earnings for the year ended December 31, 2012.
Of the total impaired loans of $26.1 million at December 31, 2012, $10.8 million are collateral dependent and have had a chargeoff taken 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, 2012. Gross charge-offs related to commercial impaired loans were $2.5 million for the year ended December 31, 2012, while gross residential impaired loan charge-offs amounted to $1.7 million.
In accordance with ASC 825, the carrying amounts and estimated fair values of financial instruments, at December 31, 2013 and 2012 are as follows:
(dollars in thousands)			Fair Value Measurements at
	Carrying		December 31, 2013 Using:
	Value		Level 1			Level 2			Level 3			Total
Financial assets:
Cash and cash equivalents	$	583,044		583,044			-			-			583,044
Securities available for sale		863,754		10			863,744			-			863,754
Held to maturity securities		86,215		-			90,305			-			90,305
Federal Reserve Bank and Federal Home Loan Bank stock		10,500		N/	A		N/	A		N/	A		N/	A
Net loans		2,861,095		-			-			2,910,940			2,910,940
Accrued interest receivable		11,198		-			3,452			7,746			11,198
Financial liabilities:
Demand deposits		318,456		318,456			-			-			318,456
Interest bearing deposits		3,608,615		2,477,567			1,132,025			-			3,609,592
Short-term borrowings		204,162		-			204,162			-			204,162
Accrued interest payable		468		101			367			-			468
(dollars in thousands)			Fair Value Measurements at
	Carrying		December 31, 2012 Using:
	Value		Level 1			Level 2			Level 3			Total
Financial assets:
Cash and cash equivalents	$	544,016		544,016			-			-			544,016
Securities available for sale		912,092		10			912,082			-			912,092
Held to maturity securities		143,426		-			151,126			-			151,126
Federal Reserve Bank and Federal Home Loan Bank stock		9,632		N/	A		N/	A		N/	A		N/	A
Net loans		2,636,806		-			-			2,771,705			2,771,705
Accrued interest receivable		11,752		-			4,114			7,638			11,752
Financial liabilities:
Demand deposits		300,544		300,544			-			-			300,544
Interest bearing deposits		3,503,649		2,426,170			1,079,663			-			3,505,833
Short-term borrowings		159,846		-			159,846			-			159,846
Accrued interest payable		449		103			346			-			449
The specific estimation methods and assumptions used can have a substantial impact on the resulting fair values of financial instruments. 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 income statement in the respective investment class under total interest 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.

Regulatory_Capital_Requirement

Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2013
Regulatory Capital Requirements [Abstract]	'
Regulatory Capital Requirements	'
	(14) Regulatory Capital Requirements
	The Bank is subject to two overlapping sets of regulatory capital requirements, which require the Bank to maintain minimum levels of regulatory capital. Under the tangible, core/leverage and risk-based requirements in effect at December 31, 2013 and 2012, Trustco Bank was required to maintain a minimum tangible capital of 1.50% of adjusted total assets, a minimum leverage ratio of core capital to adjusted total assets of 4.00% and a minimum ratio of total capital to risk weighted assets of 8.00%.
	Federal banking regulations also establish a “prompt corrective action” capital framework for the classification of banks into five categories: well capitalized, adequately capitalized, under capitalized, significantly under capitalized, and critically under capitalized. Generally, an institution is considered well capitalized if it has a leverage capital ratio of at least 5.00% (based on total adjusted quarterly assets), a Tier 1 risk-based capital ratio of at least 6.00%, and a total risk-based capital ratio of at least 10.00%. An institution is adequately capitalized if it has a leverage ratio of at least 4.00% (3.00% for the most highly rated institutions); a Tier 1 risk-based capital ratio of 4.00% or greater and a total risk-based capital ratio of 8.00% or greater. An institution is “undercapitalized” if it does not achieve the ratios to be considered to be adequately captitalized.
	The foregoing capital ratios are based on specific quantitative measures of assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by the regulator about capital components, risk weighting and other factors.
	As of December 31, 2013 and 2012, Trustco Bank met all capital adequacy requirements to which it was subject. Further, the most recent regulator notification categorized the Bank as a well-capitalized institution. There have been no conditions or events since that notification that management believes have changed the Bank’s capital classification.
	Under its prompt corrective action regulations, the OCC is required to take certain supervisory actions (and may take additional discretionary actions) with respect to an undercapitalized institution. Such actions could have a direct material effect on an institution’s financial statements. As stated above, the Bank has been classified as well capitalized for regulatory purposes, and therefore, these regulations do not apply. The following is a summary of actual capital amounts and ratios as of December 31, 2013 and 2012, for Trustco Bank:
	(dollars in thousands)	As of December 31, 2013					Well			Adequately
		Amount		Ratio			Capitalized*			Capitalized*
	Tier 1 (core) capital	$	365,954		8.07	%		5	%		4	%
	Tier 1 risk-based capital		365,954		16.34			6			4
	Total risk-based capital		394,200		17.6			10			8
	(dollars in thousands)	As of December 31, 2012					Well			Adequately
		Amount		Ratio			Capitalized*			Capitalized*
	Tier 1 (core) capital	$	349,580		8.05	%		5	%		4	%
	Tier 1 risk-based capital		349,580		16.35			6			4
	Total risk-based capital		376,565		17.62			10			8
	*Regulatory minimum requirements to be considered to be Well Capitalized and Adequately Capitalized
	TrustCo is not currently subject to formal capital requirements; however, under the Dodd-Frank Act, it will become subject to Federal Reserve regulations requiring minimum capital requirements in July 2015. The following is a summary of actual capital amounts and ratios as of December 31, 2013 and 2012 for TrustCo on a consolidated basis, with the calculations done on the same basis as for Trustco Bank.
	(dollars in thousands)	As of December 31, 2013
		Amount		Ratio
	Leverage capital	$	375,063		8.27	%
	Tier 1 risk-based capital		375,063		16.74
	Total risk-based capital		403,317		18
		As of December 31, 2012
		Amount		Ratio
	Leverage capital	$	356,687		8.21	%
	Tier 1 risk-based capital		356,687		16.68
	Total risk-based capital		383,678		17.94
	In July 2013, the federal bank regulatory agencies issued a final rule that will revise their risk-based capital requirements and the method for calculating risk-weighted assets to make them consistent with agreements that were reached by the Basel Committee on Banking Supervision and certain provisions of the Dodd-Frank Act. The final rule applies to all depository institutions, top-tier bank holding companies with total consolidated assets of $500 million or more and top-tier savings and loan holding companies. Among other matters, the rule establishes a new common equity Tier 1 minimum capital requirement of 4.50% of risk-weighted assets, increases the minimum Tier 1 capital to risk-based assets requirement from 4.00% to 6.00% of risk-weighted assets, changes the risk-weightings of certain assets, creates an additional capital conservation buffer over the required capital ratios and changes what qualifies as capital for purposes of meeting the various capital requirements. The implementation of the new rule will begin for TrustCo on January 1, 2015.

Other_Comprehensive_Income

Other Comprehensive Income	12 Months Ended
	Dec. 31, 2013
Other Comprehensive Income [Abstract]	'
Other Comprehensive Income	'
	(15) Other Comprehensive Income
	The following is a summary of the accumulated other comprehensive income (loss) balances, net of tax:
		For the year ended 12/31/13
					Other			Amount				Other
					Comprehensive			reclassified				Comprehensive
					Income (loss)-			from Accumulated				Income (loss)-
		Balance at			Before			Other Comprehensive				Year			Balance at
		12/31/12			Reclassifications			Income				ended 12/31/13			12/31/13
	Net unrealized holding gain (loss) on securities available for sale, net of tax	$	3,755			(20,860	)		(973	)			(21,833	)		(18,078	)
	Net change in overfunded position in pension and postretirement plans arising during the year, net of tax		(2,506	)		6,349			-				6,349			3,843
	Net change in net actuarial loss and prior service credit on pension and postretirement benefit plans, net of tax		309			-			123				123			432
	Accumulated other comprehensive income (loss), net of tax	$	1,558			(14,511	)		(850	)			(15,361	)		(13,803	)
			For the year ended 12/31/12
					Other			Amount				Other
					Comprehensive			reclassified				Comprehensive
					Income (loss)-			from Accumulated				Income (loss)-
		Balance at			Before			Other Comprehensive				Year			Balance at
		12/31/11			Reclassifications			Income				ended 12/31/12			12/31/12
	Net unrealized holding gain (loss) on securities available for sale, net of tax	$	(1,018	)		6,070			(1,297	)			4,773			3,755
	Net change in overfunded position in pension and postretirement plans arising during the year, net of tax		(1,758	)		(748	)		-				(748	)		(2,506	)
	Net change in net actuarial loss and prior service credit on pension and postretirement benefit plans, net of tax		283			-			26				26			309
	Accumulated other comprehensive income (loss), net of tax	$	(2,493	)		5,322			(1,271	)			4,051			1,558
			For the year ended 12/31/11
					Other			Amount				Other
					Comprehensive			reclassified				Comprehensive
					Income (loss)-			from Accumulated				Income (loss)-
		Balance at			Before			Other Comprehensive				Year			Balance at
		12/31/10			Reclassifications			Income				ended 12/31/11			12/31/11
	Net unrealized holding gain (loss) on securities available for sale, net of tax	$	(5,607	)		5,446			(857	)			4,589			(1,018	)
	Net change in overfunded position in pension and postretirement plans arising during the year, net of tax		1,100			(2,858	)		-				(2,858	)		(1,758	)
	Net change in net actuarial loss and prior service credit on pension and postretirement benefit plans, net of tax		388			-			(105	)			(105	)		283
	Accumulated other comprehensive income (loss), net of tax	$	(4,119	)		2,588			(962	)			1,626			(2,493	)
	The following represents the reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2013, 2012 and 2011:
		Years Ended									Affected
		December 31,									Line Item
		2013			2012			2011			in Statements
	Unrealized gains (losses) on securities available for sale
	Realized gain on securities transactions	$	1,622			2,161			1,428		Net gain on securities transactions
	Income tax expense		(649	)		(864	)		(571	)	Income taxes
	Net of tax		973			1,297			857
	Amortization of pension and postretirement benefit items
	Amortization of net actuarial loss		(467	)		(306	)		(85	)	Salaries and employee benefits
	Amortization of prior service credit		262			262			262		Salaries and employee benefits
	Income tax benefit		82			18			(72	)	Income taxes
	Net of tax		(123	)		(26	)		105
	Total reclassifications, net of tax	$	850			1,271			962

Common_stock_offering

Common stock offering	12 Months Ended
	Dec. 31, 2013
Common stock offering [Abstract]	'
Common Stock Offering	'
	(16) Common stock offering
	On July 6, 2011, the Company completed a public offering of 15,640,000 shares of common stock, $1 par value per share. The 15,640,000 shares included 2,040,000 additional shares of common stock as a result of the underwriters exercising their over-allotment option. The common stock was sold at $4.60 per share. Net proceeds from the offering, after direct costs, were $67.6 million.

Building_Held_for_Sale

Building Held for Sale	12 Months Ended
	Dec. 31, 2013
Building Held for Sale [Abstract]	'
Building Held for Sale	'
	(17) Building Held for Sale
	During July 2013, Trustco entered into an agreement to sell a building that was to be used as the regional operations center in Florida to a third party purchaser for approximately $5.0 million.  As of December 31, 2013, the carrying value of the building was approximately $3.2 million and the building was held for sale and included in Other Assets in the Consolidated Statement of Financial Condition.  The sale occurred during the first quarter of 2014 and the Company recognized a gain of $1.6 million.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2013
Recent Accounting Pronouncements [Abstract]	'
Recent Accounting Pronouncements	'
	(18) Recent Accounting Pronouncements
	Effective January 2012, the Company adopted ASU No. 2011-05, Presentation of Comprehensive Income (ASU 2011-05). ASU 2011-05 is intended to increase the prominence of items reported in other comprehensive income and to facilitate convergence of accounting guidance in this area with that of the IASB. The amendments require that all nonowner changes in stockholders’ equity be presented in a single continuous statement of comprehensive income or in two separate but consecutive statements. In December 2011, the FASB issued ASU No. 2011-12, Comprehensive Income (Topic 220): Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05 (ASU 2011-12). ASU 2011-12 defers the provisions of ASU 2011-05 that require the presentation of reclassification adjustments on the face of both the statement of income and statement of other comprehensive income. Amendments under ASU 2011-05 that were not deferred under ASU 2011-12 will be applied retrospectively for fiscal years, and interim periods within those years, beginning after December 15, 2011. The adoption of this update did not have a material impact on the consolidated financial statements.

Parent_Company_Only

Parent Company Only	12 Months Ended
	Dec. 31, 2013
Parent Company Only [Abstract]	'
Parent Company Only	'
	(19) Parent Company Only
	The following statements pertain to TrustCo Bank Corp NY (Parent Company):
	Statements of Income
	(dollars in thousands)	Years Ended December 31,
	Income:	2013			2012			2011
	Dividends and interest from subsidiaries	$	24,491			24,475			19,635
	Net gain on securities transactions		-			-			45
	Income from other investments		-			-			1
	Total income		24,491			24,475			19,681
	Expense:
	Operating supplies		81			105			86
	Professional services		491			296			362
	Miscellaneous expense		1,042			737			555
	Total expense		1,614			1,138			1,003
	Income before income taxes and subsidiaries'undistributed earnings		22,877			23,337			18,678
	Income tax benefit		(548	)		(364	)		(174	)
	Income before subsidiaries'undistributed earnings		23,425			23,701			18,852
	Equity in undistributed earnings of subsidiaries		16,387			13,833			14,235
	Net income	$	39,812			37,534			33,087
	Statements of Condition
	(dollars in thousands)	December 31,
	Assets:	2013			2012
	Cash in subsidiary bank	$	15,263			12,950
	Investments in subsidiaries		352,717			351,704
	Securities available for sale		10			10
	Other assets		227			178
	Total assets		368,217			364,842
	Liabilities and shareholders' equity:
	Accrued expenses and other liabilities		6,404			6,044
	Total liabilities		6,404			6,044
	Shareholders' equity		361,813			358,798
	Total liabilities and shareholders'equity	$	368,217			364,842
	Statements of Cash Flows
	(dollars in thousands)				Years Ended December 31,
		2013			2012			2011
	Increase/(decrease) in cash and cash equivalents:
	Cash flows from operating activities:
	Net income	$	39,812			37,534			33,087
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed earnings of subsidiaries		(16,387	)		(13,833	)		(14,235	)
	Stock based compensation expense		378			405			287
	Net gain on securities transactions		-			-			(45	)
	Net change in other assets and accrued expenses		277			(158	)		(232	)
	Total adjustments		(15,732	)		(13,586	)		(14,225	)
	Net cash provided by operating activities		24,080			23,948			18,862
	Cash flows from investing activities:
	Proceeds from sale of securities available for sale		-			-			372
	Investment in bank subsidiary		-			-			(67,000	)
	Purchases of securities available for sale		-			-			(68	)
	Net cash used in investing activities		-			-			(66,696	)
	Cash flows from financing activities:
	Proceeds from exercise of stock options and related tax benefits		36			-			-
	Dividends paid		(24,711	)		(24,574	)		(21,320	)
	Net proceeds from common stock offering		-			-			67,578
	Proceeds from sales of treasury stock		2,908			2,913			2,900
	Net cash provided by (used in) financing activities		(21,767	)		(21,661	)		49,158
	Net increase in cash and cash equivalents		2,313			2,287			1,324
	Cash and cash equivalents at beginning of year		12,950			10,663			9,339
	Cash and cash equivalents at end of year	$	15,263			12,950			10,663

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	12 Months Ended
	Dec. 31, 2013
Basis of Presentation [Abstract]	'
Consolidation	'
	Consolidation
	The consolidated financial statements of the Company include the accounts of the subsidiaries after elimination of all significant intercompany accounts and transactions.
Use of Estimates	'
	Use of Estimates
	To prepare financial statements in conformity with U.S. generally accepted accounting principles, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. The allowance for loan losses, other real estate owned and the fair value of financial instruments are particularly subject to change, which may be material.
Securities Available for Sale and Held to Maturity	'
	Securities Available for Sale and Held to Maturity
	Securities available for sale are carried at fair value with any unrealized appreciation or depreciation of value, net of tax, included as an element of accumulated other comprehensive income or loss in shareholders’ equity. Management maintains an available for sale portfolio in order to provide maximum flexibility in balance sheet management. The designation of available for sale is made at the time of purchase based upon management’s intent to hold the securities for an indefinite period of time. These securities, however, are available for sale in response to changes in market interest rates, related changes in liquidity needs, or changes in the availability of and yield on alternative investments. Unrealized losses on securities that reflect a decline in value which is other than temporary, if any, are charged to income.
	The cost of debt securities available for sale is adjusted for amortization of premium and accretion of discount using the interest method. Premiums and discounts on securities are amortized on the interest method without anticipating prepayments, except for mortgage backed securities where prepayments are anticipated.
	Gains and losses on the sale of securities available for sale are based on the amortized cost of the specific security sold at trade date.
	Debt securities that management has the positive intent and ability to hold until maturity are classified as held to maturity and are carried at their remaining unpaid principal balance, net of unamortized premiums or unaccreted discounts. Premiums are amortized and discounts are accreted using the interest method over the estimated remaining term of the underlying security.
Other Than Temporary Impairment ("OTTI")	'
	Other Than Temporary Impairment (“OTTI”)
	A decline in the fair value of any available for sale or held to maturity security below cost that is deemed to be other than temporary is charged to earnings and/or accumulated other comprehensive income, resulting in the establishment of a new cost basis of the security. Management evaluates these types of securities for OTTI at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. Additional discussion of OTTI is included in Note 3 of the consolidated financial statements.
Federal Reserve Bank and Federal Home Loan Bank Stock	'
	Federal Reserve Bank and Federal Home Loan Bank stock
	The Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income. The Bank is also a member of its regional Federal Reserve Bank. FRB stock is carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income.
Loans	'
	Loans
	Loans are carried at the principal amount outstanding net of unearned income and unamortized loan fees and costs, which are recognized as adjustments to interest income over the applicable loan term. Interest income on loans is accrued based on the principal amount outstanding.
	Nonperforming loans include non-accrual loans, restructured loans, and loans which are three payments or more past due and still accruing interest. Generally, loans are placed in non-accrual status either due to the delinquent status of principal and/or interest payments, or a judgment by management that, although payments of principal and/or interest are current, such action is prudent based upon specific facts and circumstances surrounding the borrower. Typically, a loan is moved to non-accrual status after 90 days of non-payment in accordance with the Company’s policy. Past due status is based on the contractual terms of the loan. All interest accrued but not received for loans placed on non-accrual status is reversed against interest income. Future payments received on nonperforming loans are recorded as interest income or principal reductions based upon management’s ultimate expectation for collection. Loans may be removed from non-accrual status when they become current as to principal and interest and have demonstrated a sustained ability to make loan payments in accordance with the contractual terms of the loan. Loans may also be removed from non-accrual status when, in the opinion of management, the loan is expected to be fully collectable as to principal and interest. When, in the opinion of management, the collection of principal appears unlikely, the loan balance is evaluated in light of its sources of repayment, and a charge-off is recorded when appropriate.
	Loan origination fees, net of certain direct origination costs, are deferred and recognized using the level yield method without anticipating prepayments.
Allowance for Loan Losses	'
	Allowance for Loan Losses
	The allowance for loan losses is maintained at a level considered adequate by management to provide for probable incurred loan losses. The allowance is increased by provisions charged against income, while loan losses are charged against the allowance when management deems a loan balance to be uncollectible. Subsequent recoveries, if any, are credited to the allowance.
	The Company performs an analysis of the adequacy of the allowance on at least a quarterly basis. Management estimates the allowance balance required using past loan loss experience, the nature and volume of the portfolio, information about specific borrower situations, current economic conditions, past due and charge-off trends and other factors. In addition, various regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses. Such agencies may require the Company to change the allowance based on their judgments of information available to them at the time of their examination. Allocations of the allowance may be made for specific loans, but the entire allowance is available for any loan that, in management’s judgment, should be charged off. The allowance methodology consists of specific and general components. The specific component relates to loans that are individually classified as impaired.
	A loan is impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Additionally, loans for which the terms have been modified resulting in a concession, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings (TDR’s) and classified as impaired.
	Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the principal and interest owed.
	Commercial and commercial real estate loans in non-accrual status are defined as impaired loans and are individually evaluated for impairment. The Company also has a portfolio of residential restructured loans that are defined as impaired. If a loan is impaired, a charge-off is taken so that the loan is reported at the present value of estimated future cash flows using the loan’s existing rate or at the fair value of collateral, if repayment is expected solely from the collateral. Residential real estate loans and consumer loans are collectively evaluated for impairment.
	TDR’s are measured at the present value of estimated future cash flows using the loan’s effective rate at inception. If a TDR is considered to be a collateral dependent loan, the loan is reported at the fair value of the collateral with any charge-off recognized at that time. For TDR’s that subsequently default, the Company determines the amount of additional charge-off, if any, in accordance with the accounting policy for the allowance for loan losses with respect to impaired loans described previously.
	The general component of the allowance covers non-impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by geography for each portfolio segment and is based on the actual net loss history experienced by the Company over the most recent four years. This actual loss experience is supplemented with other economic factors based on the risks present in each geography and portfolio segment. These economic factors include consideration of the following: changes in national, regional and local economic trends and conditions; effects of any changes in interest rates; changes in the volume and severity of net charge-offs, delinquencies, nonperforming loans; changes in the experience, ability, and depth of lending management and other relevant staff; effects of any changes in credit concentrations; effects of any changes in underwriting standards, lending policies, procedures, and practices; and changes in the nature, volume and terms of loans.
	The Company’s allowance methodology also includes additional allocation percentages for residential and installment loans in non-accrual status and residential and installment loans three payments past due and still accruing interest, commercial loans classified by the internal loan review grading process, and residential loans with loan-to-value ratios in excess of 90% at the time of origination. The reserve percentages are determined based upon a review of recent charge-offs and take into consideration the type of loan, the fixed or variable nature of the loan, and the type and geography of the underlying collateral, if any.
	The following portfolio segments have been identified: commercial loans, 1-to-4 family residential real estate loans, and installment loans:
	Commercial:
	Commercial real estate loans and other commercial loans are made based primarily on the identified cash flow of the borrower and secondarily on the underlying collateral provided by the borrower. Commercial real estate collateral is generally located within the Bank’s geographic territories; while collateral for non-real estate secured commercial loans is typically accounts receivable, inventory, and/or equipment. Repayment is primarily dependent upon the borrower’s ability to service the debt based upon cash flows generated from the underlying business. Additional support involves liquidation of the pledged collateral and enforcement of a personal guarantee, if a guarantee is obtained.
	Residential real estate:
	Residential real estate loans, including first mortgages, home equity loans and home equity lines of credit, are collateralized by first or second liens on one-to-four family residences generally located within the Bank’s market areas. Proof of ownership title, clear mortgage title, and hazard insurance coverage are normally required.
	Installment:
	The Company’s installment loans are primarily made up of installment loans and personal lines of credit. The installment loans represent a relatively small portion of the loan portfolio and are primarily used for personal expenses and are secured by automobiles, equipment and other forms of collateral, while personal lines of credit are unsecured.
Bank Premises and Equipment	'
	Bank Premises and Equipment
	Premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed on either the straight-line or accelerated methods over the remaining useful lives of the assets; generally 20 to 40 years for buildings, 3 to 7 years for furniture and equipment, and the shorter of the estimated life of the asset or the lease term for leasehold improvements.
Other Real Estate Owned	'
	Other Real Estate Owned
	Other real estate owned are assets acquired through foreclosures on loans. At both December 31, 2013 and 2012 there were $8.7 million of other real estate owned included in the category of Other Assets in the accompanying Consolidated Statements of Condition.
	Each other real estate owned property is recorded on an individual basis at the lower of (1) fair value minus estimated costs to sell or (2) “cost” (which is the fair value at initial foreclosure). When a property is acquired, the excess of the loan balance over fair value is charged to the allowance for loan losses. Subsequent write downs and gains and losses on sale are included in noninterest expense. Operating costs after acquisition are expensed.
Income Taxes	'
	Income Taxes
	Deferred taxes are recorded for the future tax consequences of events that have been recognized in the financial statements or tax returns based upon enacted tax laws and rates. Deferred tax assets are recognized subject to management’s judgment that realization is more likely than not.
Dividend Restrictions	'
	Dividend Restrictions
	The Company’s ability to pay dividends to its shareholders is dependent upon the ability of the Bank to pay dividends to the Company. The payment of dividends by the Bank to the Company is subject to continued compliance with minimum regulatory capital requirements and the filing of notices or applications with the Bank’s and the Company’s regulators. The Bank’s primary regulator may disapprove a dividend if: the Bank would be undercapitalized following the distribution; the proposed capital distribution raises safety and soundness concerns; or the capital distribution would violate a prohibition contained in any statue, regulation or agreement between the Bank and a regulator or a condition imposed in a previously approved application or notice. Currently the Bank meets the regulatory definition of a well capitalized institution. During 2014, the Bank could declare dividends of approximately $30.2 million plus any 2014 net profits retained to the date of the dividend declaration.
Benefit Plans	'
	Benefit Plans
	The Company has a defined benefit pension plan covering substantially all of its employees. The benefits are based on years of service and the employee’s compensation. This plan was frozen as of December 31, 2006.
	The Company has a postretirement benefit plan that permits retirees under age 65 to participate in the Company’s medical plan by which retirees pay all of their premiums. At age 65, the Company provides access to a Medicare Supplemental program for retirees.
	Under certain employment contracts with selected executive officers, the Company is obligated to provide postretirement benefits to these individuals once they attain certain vesting requirements.
	The Company recognized in the Consolidated Statement of Condition the funded status of the pension plan and postretirement benefit plan with an offset, net of tax, recorded in accumulated other comprehensive income.
Stock-Based Compensation Plans	'
	Stock Based Compensation Plans
	The Company has stock based compensation plans for employees and directors. Compensation cost is recognized for stock options and restricted stock awards issued to employees and directors based on the fair value of these awards at the date of grant. A Black-Scholes model is utilized to estimate the fair value of stock options, while the fair value of the Company’s common stock at the date of grant is used for restricted stock awards. Awards to be settled in cash based on the fair value of the Company’s stock at vesting are treated as liability based awards.
	Compensation cost for stock options and restricted stock awards to be settled in stock are recognized over the required service period generally defined as the vesting period. The expense is recognized over the shorter of each award’s vesting period or the retirement date for any awards that vest immediately upon eligible retirement.
	Compensation costs for liability based awards are re-measured at each reporting date and recognized over the vesting period. For awards with performance based conditions, compensation cost is recognized over the performance period based on the Company’s expectation of meeting the specific performance criteria.
Earnings Per Share	'
	Earnings Per Share
	Basic earnings per common share is net income divided by the weighted average number of common shares outstanding during the period. All outstanding unvested share-based payment awards that contain rights to nonforfeitable dividends are considered participating securities for this calculation. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under stock options.
Reclassification of Prior Year Statements	'
	Reclassification of Prior Year Statements
	It is the Company’s policy to reclassify prior year consolidated financial statements to conform to the current year presentation.
Segment Reporting	'
	Segment Reporting
	The Company’s operations are exclusively in the financial services industry and include the provision of traditional banking services. Management evaluates the performance of the Company based on only one business segment, that of community banking. The Company operates primarily in the geographical region of Upstate New York with branches also in Florida and the mid-Hudson valley region of New York. In the opinion of management, the Company does not have any other reportable segments as defined by “Accounting Standards Codification” (ASC) Topic 280, “Disclosure about Segments of an Enterprise and Related Information”.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	The Company classifies cash on hand, cash due from banks, Federal Funds sold, and other short-term investments as cash and cash equivalents for disclosure purposes.
Trust Assets	'
	Trust Assets
	Assets under management with the Trustco Financial Services Department are not included on the Company’s consolidated financial statements because Trustco Financial Services holds these assets in a fiduciary capacity.
Comprehensive Income	'
	Comprehensive Income
	Comprehensive income represents the sum of net income and items of other comprehensive income or loss, which are reported directly in shareholders’ equity, net of tax, such as the change in net unrealized gain or loss on securities available for sale and changes in the funded position of the pension and postretirement benefit plans. Accumulated other comprehensive income or loss, which is a component of shareholders’ equity, represents the net unrealized gain or loss on securities available for sale, net of tax and the funded position in the Company’s pension plan and postretirement benefit plans, net of tax.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	Fair values of financial instruments are estimated using relevant market information and other assumptions, as more fully disclosed in Note 13. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect these estimates.

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2013
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)	31-Dec-13
				Gross		Gross
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gains		Losses		Value
	U.S. government sponsored enterprises	$	200,531		22		1,724		198,829
	State and political subdivisions		7,623		135		-		7,758
	Mortgage backed securities and collateralized mortgage obligations - residential		552,230		267		20,048		532,449
	Corporate bonds		10,429		43		1		10,471
	Small Business Administration-guaranteed participation securities		111,383		-		8,354		103,029
	Mortgage backed securities and collateralized mortgage obligations - commercial		10,965		-		407		10,558
	Other		650		-		-		650
	Total debt securities		893,811		467		30,534		863,744
	Equity securities		10		-		-		10
	Total securities available for sale	$	893,821		467		30,534		863,754
		31-Dec-12
				Gross		Gross
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gains		Losses		Value
	U.S. government sponsored enterprises	$	262,063		1,055		10		263,108
	State and political subdivisions		25,815		642		-		26,457
	Mortgage backed securities and collateralized mortgage obligations - residential		515,322		3,982		528		518,776
	Corporate bonds		26,312		336		119		26,529
	Small Business Administration-guaranteed participation securities		75,674		888		-		76,562
	Other		650		-		-		650
	Total debt securities		905,836		6,903		657		912,082
	Equity securities		10		-		-		10
	Total securities available for sale	$	905,846		6,903		657		912,092
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 2013, 2012 and 2011 are as follows:
	(dollars in thousands)	Year ended December 31,
		2013		2012		2011
	Proceeds from sales	$	160,820		154,944		47,296
	Proceeds from calls		256,384		1,049,306		1,124,649
	Gross realized gains		1,702		2,584		1,472
	Gross realized losses		80		423		44
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)	31-Dec-13
				Gross		Gross
		Amortized		Unrecognized		Unrecognized		Fair
		Cost		Gains		Losses		Value
	Mortgage backed securities and collateralized mortgage obligations - residential	$	76,270		2,744		138		78,876
	Corporate bonds		9,945		1,484		-		11,429
	Total held to maturity	$	86,215		4,228		138		90,305
		31-Dec-12
				Gross		Gross
		Amortized		Unrecognized		Unrecognized		Fair
		Cost		Gains		Losses		Value
	Mortgage backed securities and collateralized mortgage obligations - residential	$	108,471		5,724		-		114,195
	Corporate bonds		34,955		1,976		-		36,931
	Total held to maturity	$	143,426		7,700		-		151,126
Securities held in available for sale and held to maturity greater than 10% of shareholders equity	'
	The Company has the following balances of securities held in the available for sale and held to maturity portfolios as of December 31, 2013 that represent greater than 10% of shareholders equity:
		Amortized		Fair
		Cost		Value
	Small Business Administration	$	111,383		103,029
	Federal Home Loan Mortgage Corporation		159,375		154,492
	Government National Mortgage Association		100,578		101,947
	Federal National Mortgage Association		538,260		523,070
Securities available for sale [Member]	'
Investment [Line Items]	'
Debt securities based on the securities final maturity	'
	The following table distributes the debt securities included in the available for sale portfolio as of December 31, 2013, based on the securities’ final maturity (mortgage-backed securities and collateralized mortgage obligations are stated using an estimated average life):
	(dollars in thousands)	Amortized		Fair
		Cost		Value
	Due in one year or less	$	11,221		11,284
	Due in one year through five years		359,564		355,727
	Due after five years through ten years		520,721		494,395
	Due after ten years		2,305		2,338
		$	893,811		863,744
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)	31-Dec-13
		Less than				12 months
		12 months				or more				Total
				Gross				Gross				Gross
		Fair		Unreal.		Fair		Unreal.		Fair		Unreal.
		Value		Loss		Value		Loss		Value		Loss
	U.S. government sponsored enterprises	$	198,023		1,724		-		-		198,023		1,724
	Mortgage backed securities and collateralized mortgage obligations - residential		466,056		17,698		54,835		2,350		520,891		20,048
	Corporate bonds		902		1		-		-		902		1
	Small Business Administration-guaranteed participation securities		103,029		8,354		-		-		103,029		8,354
	Mortgage backed securities and collateralized mortgage obligations - commercial		10,558		407		-		-		10,558		407
	Total	$	778,568		28,184		54,835		2,350		833,403		30,534
		31-Dec-12
		Less than				12 months
		12 months				or more				Total
				Gross				Gross				Gross
		Fair		Unreal.		Fair		Unreal.		Fair		Unreal.
		Value		Loss		Value		Loss		Value		Loss
	U.S. government sponsored enterprises	$	15,491		10		-		-		15,491		10
	Mortgage backed securities and collateralized mortgage obligations - residential		178,689		528		-		-		178,689		528
	Corporate bonds		10,283		119		-		-		10,283		119
	Total	$	204,463		657		-		-		204,463		657
Held to maturity securities [Member]	'
Investment [Line Items]	'
Debt securities based on the securities final maturity	'
	The following table distributes the debt securities included in the held to maturity portfolio as of December 31, 2013, based on the securities’ final maturity (mortgage-backed securities and collateralized mortgage obligations are stated using an estimated average life):
	(dollars in thousands)	Amortized		Fair
		Cost		Value
	Due in one year or less	$	-		-
	Due in one year through five years		86,215		90,305
	Due in five years through ten years		-		-
		$	86,215		90,305
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 unrecognized losses on held to maturity securities and the related fair values aggregated by the length of time that individual securities have been in an unrealized loss position at December 31, 2013, were as follows:
	(dollars in thousands)	31-Dec-13
		Less than				12 months
		12 months				or more				Total
				Gross				Gross				Gross
		Fair		Unrec.		Fair		Unrec.		Fair		Unrec.
		Value		Loss		Value		Loss		Value		Loss
	Mortgage backed securities and collateralized mortgage obligations - residential	$	27,091		138		-		-		27,091		138
	Total	$	27,091		138		-		-		27,091		138

Loans_and_Allowance_for_Loan_L1

Loans and Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2013
Loans and Allowance for Loan Losses [Abstract]	'
Recorded investment in loans by loan class	'
	The following tables present the recorded investment in loans by loan class:
		31-Dec-13
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Commercial:
	Commercial real estate	$	169,722		21,404		191,126
	Other		32,323		32		32,355
	Real estate mortgage - 1 to 4 family:
	First mortgages		1,909,447		378,361		2,287,808
	Home equity loans		47,494		3,642		51,136
	Home equity lines of credit		304,044		36,445		340,489
	Installment		5,292		603		5,895
	Total loans, net	$	2,468,322		440,487		2,908,809
	Less: Allowance for loan losses						47,714
	Net loans					$	2,861,095
		31-Dec-12
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Commercial:
	Commercial real estate	$	167,249		18,882		186,131
	Other		33,381		65		33,446
	Real estate mortgage - 1 to 4 family:
	First mortgages		1,814,214		275,764		2,089,978
	Home equity loans		35,601		1,089		36,690
	Home equity lines of credit		301,338		32,571		333,909
	Installment		4,183		396		4,579
	Total loans, net	$	2,355,966		328,767		2,684,733
	Less: Allowance for loan losses						47,927
	Net loans					$	2,636,806
	* 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:
		31-Dec-13
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Loans in nonaccrual status:
	Commercial:
	Commercial real estate	$	6,620		-		6,620
	Other		332		-		332
	Real estate mortgage - 1 to 4 family:
	First mortgages		26,713		4,781		31,494
	Home equity loans		691		-		691
	Home equity lines of credit		3,641		356		3,997
	Installment		93		-		93
	Total non-accrual loans		38,090		5,137		43,227
	Restructured real estate mortgages - 1 to 4 family		166		-		166
	Total nonperforming loans	$	38,256		5,137		43,393
		31-Dec-12
	(dollars in thousands)	New York and
		other states*		Florida		Total
	Loans in nonaccrual status:
	Commercial:
	Commercial real estate	$	6,511		2,698		9,209
	Other		124		-		124
	Real estate mortgage - 1 to 4 family:
	First mortgages		30,329		7,319		37,648
	Home equity loans		694		-		694
	Home equity lines of credit		4,263		501		4,764
	Installment		6		1		7
	Total non-accrual loans		41,927		10,519		52,446
	Restructured real estate mortgages - 1 to 4 family		231		-		231
	Total nonperforming loans	$	42,158		10,519		52,677
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 December 31, 2013 and 2012:
	New York and other states:
		31-Dec-13
	(dollars in thousands)		30-59		60-89		90	+	Total
		Days		Days		Days			30+ days				Total
		Past Due		Past Due		Past Due			Past Due		Current		Loans
	Commercial:
	Commercial real estate	$	583		1,426		3,379			5,388		164,334		169,722
	Other		209		-		123			332		31,991		32,323
	Real estate mortgage - 1 to 4 family:
	First mortgages		4,664		2,042		17,624			24,330		1,885,117		1,909,447
	Home equity loans		46		18		552			616		46,878		47,494
	Home equity lines of credit		1,014		331		1,897			3,242		300,802		304,044
	Installment		85		12		77			174		5,118		5,292
	Total	$	6,601		3,829		23,652			34,082		2,434,240		2,468,322
	Florida:
	(dollars in thousands)	30-59			60-89		90	+	Total
		Days		Days		Days			30+ days				Total
		Past Due		Past Due		Past Due			Past Due		Current		Loans
	Commercial:
	Commercial real estate	$	-		-		-			-		21,404		21,404
	Other		-		-		-			-		32		32
	Real estate mortgage - 1 to 4 family:
	First mortgages		552		-		4,229			4,781		373,580		378,361
	Home equity loans		-		-		-			-		3,642		3,642
	Home equity lines of credit		109		-		247			356		36,089		36,445
	Installment		-		2		-			2		601		603
	Total	$	661		2		4,476			5,139		435,348		440,487
	Total:
	(dollars in thousands)		30-59		60-89		90	+	Total
		Days		Days		Days			30+ days				Total
		Past Due		Past Due		Past Due			Past Due		Current		Loans
	Commercial:
	Commercial real estate	$	583		1,426		3,379			5,388		185,738		191,126
	Other		209		-		123			332		32,023		32,355
	Real estate mortgage - 1 to 4 family:
	First mortgages		5,216		2,042		21,853			29,111		2,258,697		2,287,808
	Home equity loans		46		18		552			616		50,520		51,136
	Home equity lines of credit		1,123		331		2,144			3,598		336,891		340,489
	Installment		85		14		77			176		5,719		5,895
	Total	$	7,262		3,831		28,128			39,221		2,869,588		2,908,809
	New York and other states:
		31-Dec-12
	(dollars in thousands)		30-59		60-89		90	+	Total
		Days		Days		Days			30+ days				Total
		Past Due		Past Due		Past Due			Past Due		Current		Loans
	Commercial:
	Commercial real estate	$	-		-		3,225			3,225		164,024		167,249
	Other		-		-		4			4		33,377		33,381
	Real estate mortgage - 1 to 4 family:
	First mortgages		6,364		2,248		21,341			29,953		1,784,261		1,814,214
	Home equity loans		177		216		464			857		34,744		35,601
	Home equity lines of credit		604		350		3,044			3,998		297,340		301,338
	Installment		40		27		-			67		4,116		4,183
	Total	$	7,185		2,841		28,078			38,104		2,317,862		2,355,966
	Florida:
	(dollars in thousands)		30-59		60-89		90	+	Total
		Days		Days		Days			30+ days				Total
		Past Due		Past Due		Past Due			Past Due		Current		Loans
	Commercial:
	Commercial real estate	$	-		-		2,698			2,698		16,184		18,882
	Other		-		-		-			-		65		65
	Real estate mortgage - 1 to 4 family:
First mortgages		862		452		5,390			6,704		269,060		275,764
Home equity loans		-		-		-			-		1,089		1,089
Home equity lines of credit		59		29		442			530		32,041		32,571
Installment		9		-		1			10		386		396
Total	$	930		481		8,531			9,942		318,825		328,767
Total:
(dollars in thousands)		30-59		60-89		90	+	Total
	Days		Days		Days			30+ days				Total
	Past Due		Past Due		Past Due			Past Due		Current		Loans
Commercial:
Commercial real estate	$	-		-		5,923			5,923		180,208		186,131
Other		-		-		4			4		33,442		33,446
Real estate mortgage - 1 to 4 family:
First mortgages		7,226		2,700		26,731			36,657		2,053,321		2,089,978
Home equity loans		177		216		464			857		35,833		36,690
Home equity lines of credit		663		379		3,486			4,528		329,381		333,909
Installment		49		27		1			77		4,502		4,579
Total	$	8,115		3,322		36,609			48,046		2,636,687		2,684,733
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 year ended December 31, 2013
				Real Estate
				Mortgage-
		Commercial		1 to 4 Family		Installment			Total
	Balance at beginning of period	$	3,771		44,069		87			47,927
	Loans charged off:
	New York and other states*		1,072		6,572		68			7,712
	Florida		100		1,020		6			1,126
	Total loan chargeoffs		1,172		7,592		74			8,838
	Recoveries of loans previously charged off:
	New York and other states*		14		715		17			746
	Florida		505		374		-			879
	Total recoveries		519		1,089		17			1,625
	Net loans charged off		653		6,503		57			7,213
	Provision for loan losses		901		6,031		68			7,000
	Balance at end of period	$	4,019		43,597		98			47,714
	(dollars in thousands)	For the year ended December 31, 2012
				Real Estate
				Mortgage-
		Commercial		1 to 4 Family		Installment			Total
	Balance at beginning of period	$	4,140		44,479		98			48,717
	Loans charged off:
	New York and other states*		1,307		6,919		128			8,354
	Florida		1,192		3,920		13			5,125
	Total loan chargeoffs		2,499		10,839		141			13,479
	Recoveries of loans previously charged off:
	New York and other states*		112		375		49			536
	Florida		26		127		-			153
	Total recoveries		138		502		49			689
	Net loans charged off		2,361		10,337		92			12,790
	Provision for loan losses		1,992		9,927		81			12,000
	Balance at end of period	$	3,771		44,069		87			47,927
	(dollars in thousands)	For the year ended December 31, 2011
				Real Estate
				Mortgage-
		Commercial		1 to 4 Family		Installment			Total
	Balance at beginning of period	$	4,228		37,447		236			41,911
	Loans charged off:
	New York and other states*		171		4,315		80			4,566
	Florida		1,000		6,990		2			7,992
	Total loan chargeoffs		1,171		11,305		82			12,558
	Recoveries of loans previously charged off:
	New York and other states*		55		477		43			575
	Florida		4		34		1			39
	Total recoveries		59		511		44			614
	Net loans charged off		1,112		10,794		38			11,944
	Provision for loan losses		1,024		17,826		(100	)		18,750
	Balance at end of period	$	4,140		44,479		98			48,717
Allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method	'
	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 December 31, 2013 and 2012:
		31-Dec-13
				1-to-4 Family
		Commercial Loans		Residential Real Estate		Installment Loans			Total
	Allowance for loan losses:
	Ending allowance balance attributable to loans:
	Individually evaluated for impairment	$	-		-		-			-
	Collectively evaluated for impairment		4,019		43,597		98			47,714
	Total ending allowance balance	$	4,019		43,597		98			47,714
	Loans:
	Individually evaluated for impairment	$	8,082		21,258		-			29,340
	Collectively evaluated for impairment		215,399		2,658,175		5,895			2,879,469
	Total ending loans balance	$	223,481		2,679,433		5,895			2,908,809
		31-Dec-12
				1-to-4 Family
		Commercial Loans		Residential Real Estate		Installment Loans			Total
	Allowance for loan losses:
	Ending allowance balance attributable to loans:
	Individually evaluated for impairment	$	-		-		-			-
	Collectively evaluated for impairment		3,771		44,069		87			47,927
	Total ending allowance balance	$	3,771		44,069		87			47,927
	Individually evaluated for impairment	$	9,333		16,740		-			26,073
	Collectively evaluated for impairment		210,244		2,443,837		4,579			2,658,660
	Total ending loans balance	$	219,577		2,460,577		4,579			2,684,733
Impaired loans by loan class	'
	The following tables present impaired loans by loan class as of December 31, 2013, 2012 and 2011:
	New York and other states:
		31-Dec-13
	(dollars in thousands)			Unpaid					Average
		Recorded		Principal		Related			Recorded
		Investment		Balance		Allowance			Investment
	Commercial:
	Commercial real estate	$	6,620		8,039		-			6,013
	Other		332		332		-			165
	Real estate mortgage - 1 to 4 family:
	First mortgages		16,257		17,353		-			14,706
	Home equity loans		561		614		-			636
	Home equity lines of credit		2,528		2,825		-			2,051
	Total	$	26,298		29,163		-			23,571
	Florida:
	(dollars in thousands)			Unpaid					Average
		Recorded		Principal		Related			Recorded
		Investment		Balance		Allowance			Investment
	Commercial:
	Commercial real estate	$	1,130		1,130		-			1,401
	Other		-		-		-			-
	Real estate mortgage - 1 to 4 family:
	First mortgages		1,630		1,922		-			1,611
	Home equity loans		-		-		-			-
	Home equity lines of credit		282		380		-			100
	Total	$	3,042		3,432		-			3,112
	Total:
	(dollars in thousands)			Unpaid					Average
		Recorded		Principal		Related			Recorded
		Investment		Balance		Allowance			Investment
	Commercial:
	Commercial real estate	$	7,750		9,169		-			7,414
	Other		332		332		-			165
	Real estate mortgage - 1 to 4 family:
	First mortgages		17,887		19,275		-			16,317
	Home equity loans		561		614		-			636
	Home equity lines of credit		2,810		3,205		-			2,151
	Total	$	29,340		32,595		-			26,683
	New York and other states:
		31-Dec-12
	(dollars in thousands)			Unpaid					Average
		Recorded		Principal		Related			Recorded
		Investment		Balance		Allowance			Investment
	Commercial:
	Commercial real estate	$	6,511		7,169		-			5,615
	Other		124		124		-			107
	Real estate mortgage - 1 to 4 family:
	First mortgages		12,964		14,143		-			6,075
	Home equity loans		623		664		-			260
	Home equity lines of credit		1,633		1,735		-			458
	Total	$	21,855		23,835		-			12,515
	Florida:
	(dollars in thousands)			Unpaid					Average
		Recorded		Principal		Related			Recorded
		Investment		Balance		Allowance			Investment
	Commercial:
	Commercial real estate	$	2,698		3,890		-			5,871
	Other		-		-		-			-
	Real estate mortgage - 1 to 4 family:
	First mortgages		1,472		2,665		-			948
	Home equity lines of credit		48		176		-			24
	Total	$	4,218		6,731		-			6,843
	Total:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	9,209		11,059		-			11,486
Other		124		124		-			107
Real estate mortgage - 1 to 4 family:
First mortgages		14,436		16,808		-			7,023
Home equity loans		623		664		-			260
Home equity lines of credit		1,681		1,911		-			482
Total	$	26,073		30,566		-			19,358
New York and other states:
	31-Dec-11
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	4,968		5,684		-			5,198
Other		13		32		-			56
Real estate mortgage - 1 to 4 family:
First mortgages		2,874		3,299		-			1,664
Home equity loans		151		199		-			69
Home equity lines of credit		-		75		-			-
Total	$	8,006		9,289		-			6,987
Florida:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	5,000		9,042		-			6,774
Other		-		-		-			-
Real estate mortgage - 1 to 4 family:
First mortgages		705		1,301		-			224
Total	$	5,705		10,343		-			6,998
Total:
(dollars in thousands)			Unpaid					Average
	Recorded		Principal		Related			Recorded
	Investment		Balance		Allowance			Investment
Commercial:
Commercial real estate	$	9,968		14,726		-			11,972
Other		13		32		-			56
Real estate mortgage - 1 to 4 family:
First mortgages		3,579		4,600		-			1,888
Home equity loans		151		199		-			69
Home equity lines of credit		-		75		-			-
Total	$	13,711		19,632		-			13,985
Modified loans by class that were determined to be TDR's	'
	The following table presents modified loans by class that were determined to be TDR’s that occurred during the years ended December 31, 2013, 2012 and 2011:
		Year ended 12/31/2013							Year ended 12/31/2012						Year ended 12/31/2011
	New York and other states*:			Pre-Modification		Post-Modification					Pre-Modification		Post-Modification				Pre-Modification		Post-Modification
				Outstanding		Outstanding					Outstanding		Outstanding				Outstanding		Outstanding
		Number of		Recorded		Recorded			Number of		Recorded		Recorded		Number of		Recorded		Recorded
	(dollars in thousands)	Contracts		Investment		Investment			Contracts		Investment		Investment		Contracts		Investment		Investment
	Commercial:
	Commercial real estate		1	$	507		507			2	$	138		138		1	$	91		90
	Real estate mortgage - 1 to 4 family:
	First mortgages		50		5,852		5,852			95		10,636		10,636		21		2,758		2,518
	Home equity loans		7		120		120			16		488		488		4		160		151
	Home equity lines of credit		13		1,061		1,061			30		1,633		1,633		-		-		-
	Total		71	$	7,540		7,540			143	$	12,895		12,895		26	$	3,009		2,759
	Florida:			Pre-Modification		Post-Modification					Pre-Modification		Post-Modification				Pre-Modification		Post-Modification
				Outstanding		Outstanding					Outstanding		Outstanding				Outstanding		Outstanding
		Number of		Recorded		Recorded			Number of		Recorded		Recorded		Number of		Recorded		Recorded
	(dollars in thousands)	Contracts		Investment		Investment			Contracts		Investment		Investment		Contracts		Investment		Investment
	Commercial:
	Commercial real estate		-	$	-		-			-	$	-		-		-	$	-		-
	Real estate mortgage - 1 to 4 family:
	First mortgages		8		1,149		1,149			12		1,265		1,265		6		852		705
	Home equity lines of credit		3		282		282			2		48		48		-		-		-
	Total		11	$	1,431		1,431			14	$	1,313		1,313		6	$	852		705
Loans by class modified as TDR's for which there was a payment default	'
	The following table presents loans by class modified as TDR’s that occurred during the years ended December 31, 2013, 2012 and 2011 for which there was a payment default during the same period:
		Year ended 12/31/2013				Year ended 12/31/2012					Year ended 12/31/2011
	New York and other states*:	Number of		Recorded		Number of			Recorded		Number of		Recorded
	(dollars in thousands)	Contracts		Investment		Contracts			Investment		Contracts		Investment
	Commercial:
	Commercial real estate		-	$	-		-		$	-		1	$	90
	Real estate mortgage - 1 to 4 family:
	First mortgages		5		440		22			2,265		13		1,729
	Home equity loans		1		44		2			13		3		113
	Home equity lines of credit		1		56		5			209		-		-
	Total		7	$	540		29		$	2,487		17	$	1,932
	Florida:
		Number of		Recorded		Number of			Recorded		Number of		Recorded
	(dollars in thousands)	Contracts		Investment		Contracts			Investment		Contracts		Investment
	Real estate mortgage - 1 to 4 family:
	First mortgages		-	$	-		6		$	605		6	$	705
	Home equity lines of credit		-		-		1			47		-		-
	Total		-	$	-		7		$	652		6	$	705
Risk category of loans by class of loans	'
	As of December 31, 2013 and 2012, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows:
		31-Dec-13
	New York and other states:
	(dollars in thousands)
		Pass		Classified		Total
	Commercial:
	Commercial real estate	$	159,024		10,698		169,722
	Other		31,691		632		32,323
		$	190,715		11,330		202,045
	Florida:
	(dollars in thousands)
		Pass		Classified		Total
	Commercial:
	Commercial real estate	$	20,274		1,130		21,404
	Other		32		-		32
		$	20,306		1,130		21,436
		31-Dec-12
	New York and other states:
	(dollars in thousands)
		Pass		Classified		Total
	Commercial:
	Commercial real estate	$	155,981		11,268		167,249
	Other		33,067		314		33,381
		$	189,048		11,582		200,630
	Florida:
	(dollars in thousands)
		Pass		Classified		Total
	Commercial:
	Commercial real estate	$	12,454		6,428		18,882
	Other		65		-		65
		$	12,519		6,428		18,947

Bank_Premises_and_Equipment_Ta

Bank Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Bank Premises and Equipment [Abstract]	'
Summary of premises and equipment	'
	A summary of premises and equipment at December 31, 2013 and 2012 follows:
	(dollars in thousands)
		2013			2012
	Land	$	2,413			2,413
	Buildings		30,010			29,584
	Furniture, Fixtures and equipment		43,697			42,636
	Leasehold improvements		25,391			24,070
	Total bank premises and Equipment		101,511			98,703
	Accumulated depreciation and amortization		(67,097	)		(62,464	)
	Total	$	34,414			36,239

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Dec. 31, 2013
Deposits [Abstract]	'
Interest expense on deposits	'
	Interest expense on deposits was as follows:
	(dollars in thousands)	For the year ended December 31,
		2013		2012		2011
	Interest bearing checking accounts	$	329		315		285
	Savings accounts		3,333		3,872		3,788
	Time deposits and money market accounts		10,138		14,313		20,597
	Total	$	13,800		18,500		24,670
Maturity of total time deposits	'
	At December 31, 2013, the maturity of total time deposits is as follows:
	(dollars in thousands)
	Under 1 year	$	923,033
	1 to 2 years		141,394
	2 to 3 years		57,431
	3 to 4 years		4,712
	4 to 5 years		4,353
	Over 5 years		125
		$	1,131,048

ShortTerm_Borrowings_Tables

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2013
Short-Term Borrowings [Abstract]	'
Short-term borrowings	'
	Short-term borrowings of the Company were cash management accounts as follows:
	(dollars in thousands)	2013			2012		2011
	Amount outstanding at December 31,	$	204,162			159,846		147,563
	Maximum amount outstanding at any month end		204,162			166,374		148,002
	Average amount outstanding		180,275			152,982		133,803
	Weighted average interest rate:
	For the year		0.82	%		0.96		1.18
	As of year end		0.82			0.89		1.13

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Summary of income tax expense/(benefit)	'
	A summary of income tax expense/(benefit) included in the Consolidated Statements of Income follows:
	(dollars in thousands)	For the year ended
		December 31,
		2013			2012			2011
	Current tax expense:
	Federal	$	22,612			19,122			19,614
	State		2,531			1,879			2,020
	Total current tax expense		25,143			21,001			21,634
	Deferred tax expense (benefit)		(1,426	)		1,440			(2,336	)
	Total income tax expense	$	23,717			22,441			19,298
Tax effects of temporary differences	'
	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2013 and 2012, are as follows:
		December 31,
	(dollars in thousands)	2013			2012
		Deductible			Deductible
		temporary			temporary
		differences			differences
	Benefits and deferred remuneration	$	(4,256	)		(4,736	)
	Difference in reporting the allowance for loan losses, net		22,774			22,710
	Other income or expense not yet reported for tax purposes		3,008			2,582
	Depreciable assets		(1,309	)		(1,413	)
	Other items		1,153			801
	Net deferred tax asset at end of year		21,370			19,944
	Net deferred tax asset at beginning of year		19,944			21,384
	Deferred tax expense (benefit)	$	(1,426	)		1,440
Effective income tax rate	'
	The effective tax rates differ from the statutory federal income tax rate. The reasons for these differences are as follows:
		For the years ended
		December 31,
		2013			2012			2011
	Statutory federal income tax rate		35	%		35			35
	Increase/(decrease) in taxes resulting from:
	Tax exempt income		(0.3	)		(0.7	)		(1.6	)
	State income tax (including alternative minimum tax), net of federal tax benefit		2.3			2.3			2
	Other items		0.3			0.8			1.4
	Effective income tax rate		37.3	%		37.4			36.8
Reconciliation of unrecognized tax benefits	'
	For the years ended December 31, 2013 and 2012 the unrecognized tax benefits and change in those unrecognized tax benefits from the beginning of the year are as follows:
	(dollars in thousands)
	Balance January 1, 2012	$	905
	Decrease in prior unrecognized tax benefits		(342	)
	Lapse of statute of limitations		(350	)
	Balance December 31, 2012	$	213
	Change in unrecognized tax reserve		-
	Balance December 31, 2013	$	213

Benefit_Plans_Tables

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'
Change in component of other comprehensive income related to retirement plan and post-retirement benefit plan	'
	The following table details the change in the components of other comprehensive income related to the retirement plan and the post-retirement benefit plan, at December 31, 2013 and 2012, respectively:
	(dollars in thousands)
			31-Dec-13
							Post-
			Retirement				Retirement
			Plan				Benefit Plan				Total
	Change in overfunded position of pension and postretirement benefits		$	(8,156	)			(2,403	)			(10,559	)
	Amortization of net actuarial gain (loss)			(516	)			49				(467	)
	Amortization of
	prior service credit			-				262				262
	Total		$	(8,672	)			(2,092	)			(10,764	)
			31-Dec-12
							Post-
			Retirement				Retirement
			Plan				Benefit Plan				Total
	Change in overfunded position of pension and postretirement benefits		$	1,834				(590	)			1,244
	Amortization of net actuarial gain (loss)			(335	)			29				(306	)
	Amortization of prior service credit			-				262				262
	Total		$	1,499				(299	)			1,200
Asset allocation of pension and postretirement benefit plans	'
	The asset allocations of the Company’s pension and postretirement benefit plans at December 31, were as follows:
			Pension Benefit								Postretirement Benefit
			Plan Assets								Plan Assets
			2013				2012				2013				2012
	Debt Securities			26	%			29				27				28
	Equity Securities			69				65				68				64
	Other			5				6				5				8
	Total			100	%			100				100				100
Fair value of plan assets by type of financial instrument and level hierarchy	'
	The fair value of the plan assets at December 31, 2013 and 2012, by asset category, is as follows:
	Retirement Plan						Fair Value Measurements at
							December 31, 2013 Using:
											Significant
							Quoted Prices in				Other				Significant
							Active Markets for				Observable				Unobservable
			Carrying				Identical Assets				Inputs				Inputs
			Value				(Level 1)				(Level 2)				(Level 3)
	(Dollars in thousands)
	Plan Assets
	Cash and cash equivalents		$	1,916				1,916				-				-
	Equity mutual funds			27,296				27,296				-				-
	U.S. government sponsored enterprises			5,091				-				5,091				-
	Corporate bonds			4,517				-				4,517				-
	Fixed income mutual funds			599				599				-				-
	Total Plan Assets		$	39,419				29,811				9,608				-
	Postretirement Benefits						Fair Value Measurements at
							December 31, 2013 Using:
											Significant
							Quoted Prices in				Other				Significant
							Active Markets for				Observable				Unobservable
			Carrying				Identical Assets				Inputs				Inputs
			Value				(Level 1)				(Level 2)				(Level 3)
	(Dollars in thousands)
	Plan Assets
	Cash and cash equivalents		$	950				950				-				-
	Equity mutual funds			12,135				12,135				-				-
	U.S. government sponsored enterprises			1,020				-				1,020				-
	Corporate bonds			449				-				449				-
	State and political subdivisions			3,381				-				3,381				-
	Total Plan Assets		$	17,935				13,085				4,850				-
	Retirement Plan						Fair Value Measurements at
							December 31, 2012 Using:
											Significant
							Quoted Prices in				Other				Significant
							Active Markets for				Observable				Unobservable
			Carrying				Identical Assets				Inputs				Inputs
			Value				(Level 1)				(Level 2)				(Level 3)
	(Dollars in thousands)
	Plan Assets
	Cash and cash equivalents		$	2,114				2,114				-				-
	Equity mutual funds			22,599				22,599				-				-
	U.S. government sponsored enterprises			4,574				-				4,574				-
	Corporate bonds			4,626				-				4,626				-
	Fixed income mutual funds			671				671				-				-
	Total Plan Assets		$	34,584				25,384				9,200				-
	Postretirement Benefits						Fair Value Measurements at
							December 31, 2012 Using:
											Significant
							Quoted Prices in				Other				Significant
							Active Markets for				Observable				Unobservable
			Carrying				Identical Assets				Inputs				Inputs
			Value				(Level 1)				(Level 2)				(Level 3)
	(Dollars in thousands)
	Plan Assets
	Cash and cash equivalents		$	1,148				1,148				-				-
	Equity mutual funds			9,718				9,718				-				-
	State and political subdivisions			4,160				-				4,160				-
	Total Plan Assets		$	15,026				10,866				4,160				-
Summary of the status of stock option plans	'
	Under each of these plans, the exercise price of each option equals the fair value of the Company’s stock on the date of grant, and an option’s maximum term is ten years. Options vest over five years from the date the options are granted for the employees plans and they are immediately vested under the directors’ plans. A summary of the status of TrustCo’s stock option plans as of December 31, 2013 and changes during the year then ended, are as follows:
			Outstanding Options									Exercisable Options
										Weighted								Weighted
							Weighted			Average						Weighted		Average
							Average			Remaining						Average		Remaining
							Exercise			Contractual						Exercise		Contractual
			Shares				Price			Life		Shares				Price		Life
	Balance, January 1, 2013			2,892,000			$	9.58					2,144,600			$	11.01
	New options awarded-2013			281,500				7.05					-				0
	Expired options - 2013			-				0					-				0
	Cancelled options-2013			-				0					-				0
	Exercised options - 2013			(14,700	)			5.15					(14,700	)			5.15
	Options became exercisable			-				0					234,600				6.25
	Balance, December 31, 2013			3,158,800			$	9.54		5.1 years			2,364,500			$	10.78	3.4 years
Assumptions used to determine the fair value of options granted	'
	Valuation of Stock-Based Compensation: The fair value of the Company’s employee and director stock options granted is estimated on the measurement date, which, for the Company, is the date of grant. The weighted-average fair value of stock options granted during 2013, 2012 and 2011 estimated using the Black-Scholes option pricing model, was $1.08, $0.76 and $0.98, respectively. The Company estimated expected market price volatility and the expected term of the options based on historical data and other factors. The assumptions used to determine the fair value of options granted during 2013, 2012 and 2011 are detailed in the table below:
		2013				2012
		Employees'				Employees'
		Plan				Plan
	Expected dividend yield			3.72	%			5.08
	Risk-free interest rate			1.45				0.8
	Expected volatility rate			25.83				30.18
	Expected lives			5.0 years				5.0 years
			2011
			Employees'				Directors'
			Plan				Plan
	Expected dividend yield			5.11	%			5.11
	Risk-free interest rate			1.9				1.59
	Expected volatility rate			26.64				28.5
	Expected lives			7.5 years				6.0 years
Restricted common shares	'
	The 2013 activity for the restricted common shares was as follows:
	Restricted common shares
							Weighted
							Average
			Shares				Price
	Balance, December 31, 2012			106,000			$	5.14
	New awards granted			-				0
	Awards became vested			-				0
	Balance, December 31, 2013			106,000			$	5.14
Restricted share units	'
	The activity for service based awards during 2013 was as follows:
	Restricted share units
							Weighted
							Average
			Units				Price
	Balance, December 31, 2012			82,500			$	5.17
	New awards granted			51,250				7.05
	Awards became vested			-				0
	Balance, December 31, 2013			133,750			$	5.89
Performance share units	'
	The activity for performance based awards during 2013 was as follows:
	Performance share units
							Weighted
							Average
			Units				Price
	Balance, December 31, 2012			65,000			$	5.17
	New awards granted			81,500				7.05
	Awards became vested			-				0
	Balance, December 31, 2013			146,500			$	6.22
Retirement Plan [Member]	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'
Change in projected/accumulated benefit obligation	'
	The Company maintains a trusteed non-contributory pension plan covering employees that have completed one year of employment and 1,000 hours of service. The benefits are based on the sum of (a) a benefit equal to a prior service benefit plus the average of the employees’ highest five consecutive years’ compensation in the ten years preceding retirement multiplied by a percentage of service after a specified date plus (b) a benefit based upon career average compensation. The amounts contributed to the plan are determined annually on the basis of (a) the maximum amount that can be deducted for federal income tax purposes or (b) the amount certified by a consulting actuary as necessary to avoid an accumulated funding deficiency as defined by the Employee Retirement Income Security Act of 1974. Contributions are intended to provide for benefits attributed to service to date. Assets of the plan are administered by Trustco Bank’s Financial Services Department. This plan was frozen as of December 31, 2006. The following tables set forth the plan’s funded (unfunded) status and amounts recognized in the Company’s consolidated statements of condition at December 31, 2013 and 2012.
	Change in Projected Benefit Obligation:		December 31,
	(dollars in thousands)		2013				2012
	Projected benefit obligation at beginning of year		$	31,990				29,283
	Service cost			69				55
	Interest cost			1,273				1,426
	Benefits paid			(2,045	)			(2,036	)
	Net actuarial loss (gain)			(3,465	)			3,262
	Projected benefit obligation at end of year		$	27,822				31,990
Change in plan assets and reconciliation of funded status	'
	Change in Plan Assets and Reconciliation of Funded Status:		December 31,
	(dollars in thousands)			2013				2012
	Fair Value of plan assets at beginning of year		$	34,584				30,278
	Actual gain on plan assets			6,880				3,342
	Company contributions			-				3,000
	Benefits paid			(2,045	)			(2,036	)
	Fair value of plan assets at end of year			39,419				34,584
	Funded status at end of year		$	11,597				2,593
Amounts recognized in accumulated other comprehensive income	'
	Amounts recognized in accumulated other comprehensive income consist of the following as of:
			December 31,
			2013				2012
	Net actuarial loss		$	813				9,486
Components of net periodic pension inome and other amounts recognized in other comprehensive income	'
	Components of Net Periodic Pension Income and Other Amounts Recognized in Other Comprehensive Income:
	(dollars in thousands)		For the years ended
			December 31,
			2013				2012				2011
	Service cost		$	69				55				45
	Interest cost			1,273				1,426				1,515
	Expected return on plan assets			(2,190	)			(1,912	)			(1,985	)
	Amortization of net actuarial loss			516				335				156
	Net periodic pension income			(332	)			(96	)			(269	)
	Amortization of net actuarial loss			(516	)			(335	)			(156	)
	Net actuarial (gain) / loss included in other comprehensive income			(8,156	)			1,834				3,689
				(8,672	)			1,499				3,533
	Total recognized in net periodic pension income and other comprehensive income		$	(9,004	)			1,401				3,264
Estimated future benefit payments	'
	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid:
	(dollars in thousands)
	Year		Pension Benefits
	2014		$	1,698
	2015			1,720
	2016			1,750
	2017			1,757
	2018			1,780
	2019 - 2023			9,141
Assumptions used to determine benefit obligation and net periodic expense	'
	The assumptions used to determine benefit obligations at December 31 are as follows:
			2013				2012				2011
	Discount rate			5.08	%			4.07				5.17
	The assumptions used to determine net periodic pension expense for the years ended December 31 are as follows:
			2013				2012				2011
	Discount rate			4.07	%			5.17				5.62
	Expected long-term rate of return on assets			6.5				6.5				6.5
Post-Retirement Benefits Plan [Member]	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'
Change in projected/accumulated benefit obligation	'
	The following tables show the plan’s funded status and amounts recognized in the Company’s Consolidated Statements of Condition at December 31, 2013 and 2012:
	Change in Accumulated Benefit Obligation:		December 31,
	(dollars in thousands)		2013				2012
	Accumulated benefit obligation at beginning of year		$	2,413				2,008
	Service cost			50				33
	Interest cost			101				97
	Plan amendments			465				-
	Benefits paid			(60	)			(48	)
	Net actuarial (gain) loss			(456	)			323
	Accumulated benefit obligation at end of year		$	2,513				2,413
Change in plan assets and reconciliation of funded status	'
	The $465 thousand plan amendment included in the above table is due to an additional executive becoming eligible for postretirement medical benefits during 2013.
	Change in Plan Assets and Reconciliation of Funded Status:		December 31,
	(dollars in thousands)		2013				2012
	Fair value of plan assets at beginning of year		$	15,026				13,662
	Actual gain on plan assets			2,909				1,364
	Company contributions			60				48
	Benefits paid			(60	)			(48	)
	Fair value of plan assets at end of year			17,935				15,026
	Funded status at end of year		$	15,422				12,613
Amounts recognized in accumulated other comprehensive income	'
			December 31,
	Amounts recognized in accumulated other comprehensive income consist of the following as of:		2013				2012
	Net actuarial gain		$	(4,945	)			(2,125	)
	Prior service credit			(2,979	)			(3,706	)
	Total		$	(7,924	)			(5,831	)
Components of net periodic pension inome and other amounts recognized in other comprehensive income	'
	Components of Net Periodic Benefit Income and Other Amounts Recognized in Other Comprehensive Income:
			For the years ended
			December 31,
	(dollars in thousands)		2013				2012				2011
	Service cost		$	50				33				26
	Interest cost			101				97				98
	Expected return on plan assets			(495	)			(451	)			(447	)
	Amortization of net actuarial gain			(49	)			(29	)			(71	)
	Amortization of prior service credit			(262	)			(262	)			(262	)
	Net periodic benefit income			(655	)			(612	)			(656	)
	Net (gain) loss			(2,868	)			(590	)			531
	Prior service cost			465				-				533
	Amortization of prior service credit			262				262				262
	Amortization of net actuarial gain			49				29				71
	Total amount recognized in other comprehensive income			(2,092	)			(299	)			1,397
	Total amount recognized in net periodic benefit income and other comprehensive income		$	(2,747	)			(911	)			741
Estimated future benefit payments	'
	The following benefit payments are expected to be paid:
	Year		Postretirement Benefits
	2014		$	56
	2015			59
	2016			62
	2017			65
	2018			70
	2019 - 2023			510
Assumptions used to determine benefit obligation and net periodic expense	'
	The discount rate assumption used to determine benefit obligations at December 31 is as follows:
			2013				2012				2011
	Discount rate			5.08	%			4.07				5.17
	The assumptions used to determine net periodic pension benefit (credit) for the years ended December 31 are as follows:
			2013				2012				2011
	Discount rate			4.07	%			5.17				5.62
	Expected long-term rate of return on assets, net of tax			3.3				3.3				3.3

Commitments_and_Contingent_Lia1

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingent Liabilities [Abstract]	'
Operating leases with minimum rental commitments	'
	The Bank leases certain banking premises. These leases are accounted for as operating leases with minimum rental commitments in the amounts presented below. The majority of these leases contain options to renew.
	(dollars in thousands)
	2014	$	6,860
	2015		6,493
	2016		6,295
	2017		5,979
	2018		5,719
	2019 and after		42,429
		$	73,775

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Reconciliation of the component parts of earnings per share	'
	A reconciliation of the component parts of earnings per share for 2013, 2012 and 2011 follows:
	(dollars in thousands, except per share data)
		2013		2012		2011
	For the years ended December 31:
	Net income	$	39,812		37,534		33,087
	Less: Net income allocated to participating securities		45		43		5
	Net income allocated to common shareholders	$	39,767		37,491		33,082
	Basic EPS:
	Distributed earnings allocated to common stock	$	24,745		24,607		22,389
	Undistributed earnings allocated to common stock		15,022		12,884		10,693
	Net income allocated to common shareholders	$	39,767		37,491		33,082
	Weighted average common shares outstanding including participating securities		94,266		93,739		85,086
	Less: Participating securities		106		106		14
	Weighted average common shares		94,160		93,633		85,072
	Basic EPS	$	0.422		0.4		0.389
	Diluted EPS:
	Net income allocated to common shareholders	$	39,767		37,491		33,082
	Weighted average common shares for basic EPS		94,160		93,633		85,072
	Effect of Dilutive Securities:
	Stock Options		46		4		-
	Weighted average common shares including potential dilutive shares		94,206		93,637		85,072
	Diluted EPS	$	0.422		0.4		0.389

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2013
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
		December 31, 2013 Using:
							Significant
				Quoted Prices in			Other			Significant
				Active Markets for			Observable			Unobservable
		Carrying		Identical Assets			Inputs			Inputs
		Value		(Level 1)			(Level 2)			(Level 3)
	(Dollars in thousands)
	Securities available-for sale:
	U.S. government-sponsored enterprises	$	198,829		-			198,829			-
	State and political subdivisions		7,758		-			7,758			-
	Mortgage-backed securities and collateralized mortgage obligations - residential		532,449		-			532,449			-
	Corporate bonds		10,471		-			10,471			-
	Small Business Administration-guaranteed participation securities		103,029		-			103,029			-
	Mortgage-backed securities and collateralized mortgage obligations - commercial		10,558		-			10,558			-
	Other securities		660		10			650			-
	Total securities available-for-sale	$	863,754		10			863,744			-
			Fair Value Measurements at
			December 31, 2012 Using:
							Significant
				Quoted Prices in			Other			Significant
				Active Markets for			Observable			Unobservable
		Carrying		Identical Assets			Inputs			Inputs
		Value		(Level 1)			(Level 2)			(Level 3)
	(Dollars in thousands)
	Securities available-for sale:
	U.S. government-sponsored enterprises	$	263,108		-			263,108			-
	State and political subdivisions		26,457		-			26,457			-
	Mortgage-backed securities and collateralized mortgage obligations - residential		518,776		-			518,776			-
	Corporate bonds		26,529		-			26,529			-
	Small Business Administration-guaranteed participation securities		76,562		-			76,562
	Other securities		660		10			650			-
	Total securities available-for-sale	$	912,092		10			912,082			-
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
		December 31, 2013 Using:
							Significant
				Quoted Prices in			Other			Significant
				Active Markets for			Observable			Unobservable
		Carrying		Identical Assets			Inputs			Inputs
		Value		(Level 1)			(Level 2)			(Level 3)
	(Dollars in thousands)
	Other real estate owned	$	8,729		-			-			8,729
	Impaired Loans:
	Commercial real estate		1,802		-			-			1,802
	Real estate mortgage - 1 to 4 family:
	First mortgages		2,425		-			-			2,425
	Home Equity Loans		48		-			-			48
	Home Equity Lines of Credit		810		-			-			810
		Fair Value Measurements at
		December 31, 2012 Using:
							Significant
				Quoted Prices in			Other			Significant
				Active Markets for			Observable			Unobservable
		Carrying		Identical Assets			Inputs			Inputs
		Value		(Level 1)			(Level 2)			(Level 3)
	(Dollars in thousands)
	Other real estate owned	$	8,705		-			-			8,705
	Impaired Loans:
	Commercial real estate		4,690		-			-			4,690
	Real estate mortgage - 1 to 4 family:
	First mortgages		5,421		-			-			5,421
	Home Equity Loans		67		-			-			67
	Home Equity Lines of Credit		581		-			-			581
Carrying amounts and estimated fair values of financial instruments	'
	In accordance with ASC 825, the carrying amounts and estimated fair values of financial instruments, at December 31, 2013 and 2012 are as follows:
	(dollars in thousands)			Fair Value Measurements at
		Carrying		December 31, 2013 Using:
		Value		Level 1			Level 2			Level 3			Total
	Financial assets:
	Cash and cash equivalents	$	583,044		583,044			-			-			583,044
	Securities available for sale		863,754		10			863,744			-			863,754
	Held to maturity securities		86,215		-			90,305			-			90,305
	Federal Reserve Bank and Federal Home Loan Bank stock		10,500		N/	A		N/	A		N/	A		N/	A
	Net loans		2,861,095		-			-			2,910,940			2,910,940
	Accrued interest receivable		11,198		-			3,452			7,746			11,198
	Financial liabilities:
	Demand deposits		318,456		318,456			-			-			318,456
	Interest bearing deposits		3,608,615		2,477,567			1,132,025			-			3,609,592
	Short-term borrowings		204,162		-			204,162			-			204,162
	Accrued interest payable		468		101			367			-			468
	(dollars in thousands)			Fair Value Measurements at
		Carrying		December 31, 2012 Using:
		Value		Level 1			Level 2			Level 3			Total
	Financial assets:
	Cash and cash equivalents	$	544,016		544,016			-			-			544,016
	Securities available for sale		912,092		10			912,082			-			912,092
	Held to maturity securities		143,426		-			151,126			-			151,126
	Federal Reserve Bank and Federal Home Loan Bank stock		9,632		N/	A		N/	A		N/	A		N/	A
	Net loans		2,636,806		-			-			2,771,705			2,771,705
	Accrued interest receivable		11,752		-			4,114			7,638			11,752
	Financial liabilities:
	Demand deposits		300,544		300,544			-			-			300,544
	Interest bearing deposits		3,503,649		2,426,170			1,079,663			-			3,505,833
	Short-term borrowings		159,846		-			159,846			-			159,846
	Accrued interest payable		449		103			346			-			449

Regulatory_Capital_Requirement1

Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2013
Regulatory Capital Requirements [Abstract]	'
Summary of actual capital amounts and ratios	'
	Under its prompt corrective action regulations, the OCC is required to take certain supervisory actions (and may take additional discretionary actions) with respect to an undercapitalized institution. Such actions could have a direct material effect on an institution’s financial statements. As stated above, the Bank has been classified as well capitalized for regulatory purposes, and therefore, these regulations do not apply. The following is a summary of actual capital amounts and ratios as of December 31, 2013 and 2012, for Trustco Bank:
	(dollars in thousands)	As of December 31, 2013					Well			Adequately
		Amount		Ratio			Capitalized*			Capitalized*
	Tier 1 (core) capital	$	365,954		8.07	%		5	%		4	%
	Tier 1 risk-based capital		365,954		16.34			6			4
	Total risk-based capital		394,200		17.6			10			8
	(dollars in thousands)	As of December 31, 2012					Well			Adequately
		Amount		Ratio			Capitalized*			Capitalized*
	Tier 1 (core) capital	$	349,580		8.05	%		5	%		4	%
	Tier 1 risk-based capital		349,580		16.35			6			4
	Total risk-based capital		376,565		17.62			10			8
	*Regulatory minimum requirements to be considered to be Well Capitalized and Adequately Capitalized
	TrustCo is not currently subject to formal capital requirements; however, under the Dodd-Frank Act, it will become subject to Federal Reserve regulations requiring minimum capital requirements in July 2015. The following is a summary of actual capital amounts and ratios as of December 31, 2013 and 2012 for TrustCo on a consolidated basis, with the calculations done on the same basis as for Trustco Bank.
	(dollars in thousands)	As of December 31, 2013
		Amount		Ratio
	Leverage capital	$	375,063		8.27	%
	Tier 1 risk-based capital		375,063		16.74
	Total risk-based capital		403,317		18
		As of December 31, 2012
		Amount		Ratio
	Leverage capital	$	356,687		8.21	%
	Tier 1 risk-based capital		356,687		16.68
	Total risk-based capital		383,678		17.94

Other_Comprehensive_Income_Tab

Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2013
Other Comprehensive Income [Abstract]	'
Accumulated other comprehensive income (loss), net of tax	'
	The following is a summary of the accumulated other comprehensive income (loss) balances, net of tax:
		For the year ended 12/31/13
					Other			Amount				Other
					Comprehensive			reclassified				Comprehensive
					Income (loss)-			from Accumulated				Income (loss)-
		Balance at			Before			Other Comprehensive				Year			Balance at
		12/31/12			Reclassifications			Income				ended 12/31/13			12/31/13
	Net unrealized holding gain (loss) on securities available for sale, net of tax	$	3,755			(20,860	)		(973	)			(21,833	)		(18,078	)
	Net change in overfunded position in pension and postretirement plans arising during the year, net of tax		(2,506	)		6,349			-				6,349			3,843
	Net change in net actuarial loss and prior service credit on pension and postretirement benefit plans, net of tax		309			-			123				123			432
	Accumulated other comprehensive income (loss), net of tax	$	1,558			(14,511	)		(850	)			(15,361	)		(13,803	)
			For the year ended 12/31/12
					Other			Amount				Other
					Comprehensive			reclassified				Comprehensive
					Income (loss)-			from Accumulated				Income (loss)-
		Balance at			Before			Other Comprehensive				Year			Balance at
		12/31/11			Reclassifications			Income				ended 12/31/12			12/31/12
	Net unrealized holding gain (loss) on securities available for sale, net of tax	$	(1,018	)		6,070			(1,297	)			4,773			3,755
	Net change in overfunded position in pension and postretirement plans arising during the year, net of tax		(1,758	)		(748	)		-				(748	)		(2,506	)
	Net change in net actuarial loss and prior service credit on pension and postretirement benefit plans, net of tax		283			-			26				26			309
	Accumulated other comprehensive income (loss), net of tax	$	(2,493	)		5,322			(1,271	)			4,051			1,558
			For the year ended 12/31/11
					Other			Amount				Other
					Comprehensive			reclassified				Comprehensive
					Income (loss)-			from Accumulated				Income (loss)-
		Balance at			Before			Other Comprehensive				Year			Balance at
		12/31/10			Reclassifications			Income				ended 12/31/11			12/31/11
	Net unrealized holding gain (loss) on securities available for sale, net of tax	$	(5,607	)		5,446			(857	)			4,589			(1,018	)
	Net change in overfunded position in pension and postretirement plans arising during the year, net of tax		1,100			(2,858	)		-				(2,858	)		(1,758	)
	Net change in net actuarial loss and prior service credit on pension and postretirement benefit plans, net of tax		388			-			(105	)			(105	)		283
	Accumulated other comprehensive income (loss), net of tax	$	(4,119	)		2,588			(962	)			1,626			(2,493	)
Reclassifications out of accumulated other comprehensive income	'
	The following represents the reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2013, 2012 and 2011:
		Years Ended									Affected
		December 31,									Line Item
		2013			2012			2011			in Statements
	Unrealized gains (losses) on securities available for sale
	Realized gain on securities transactions	$	1,622			2,161			1,428		Net gain on securities transactions
	Income tax expense		(649	)		(864	)		(571	)	Income taxes
	Net of tax		973			1,297			857
	Amortization of pension and postretirement benefit items
	Amortization of net actuarial loss		(467	)		(306	)		(85	)	Salaries and employee benefits
	Amortization of prior service credit		262			262			262		Salaries and employee benefits
	Income tax benefit		82			18			(72	)	Income taxes
	Net of tax		(123	)		(26	)		105
	Total reclassifications, net of tax	$	850			1,271			962

Parent_Company_Only_Tables

Parent Company Only (Tables)	12 Months Ended
	Dec. 31, 2013
Parent Company Only [Abstract]	'
Statements of Income	'
	Statements of Income
	(dollars in thousands)	Years Ended December 31,
	Income:	2013			2012			2011
	Dividends and interest from subsidiaries	$	24,491			24,475			19,635
	Net gain on securities transactions		-			-			45
	Income from other investments		-			-			1
	Total income		24,491			24,475			19,681
	Expense:
	Operating supplies		81			105			86
	Professional services		491			296			362
	Miscellaneous expense		1,042			737			555
	Total expense		1,614			1,138			1,003
	Income before income taxes and subsidiaries'undistributed earnings		22,877			23,337			18,678
	Income tax benefit		(548	)		(364	)		(174	)
	Income before subsidiaries'undistributed earnings		23,425			23,701			18,852
	Equity in undistributed earnings of subsidiaries		16,387			13,833			14,235
	Net income	$	39,812			37,534			33,087
Statements of Condition	'
	Statements of Condition
	(dollars in thousands)	December 31,
	Assets:	2013			2012
	Cash in subsidiary bank	$	15,263			12,950
	Investments in subsidiaries		352,717			351,704
	Securities available for sale		10			10
	Other assets		227			178
	Total assets		368,217			364,842
	Liabilities and shareholders' equity:
	Accrued expenses and other liabilities		6,404			6,044
	Total liabilities		6,404			6,044
	Shareholders' equity		361,813			358,798
	Total liabilities and shareholders'equity	$	368,217			364,842
Statements of Cash Flows	'
	Statements of Cash Flows
	(dollars in thousands)				Years Ended December 31,
		2013			2012			2011
	Increase/(decrease) in cash and cash equivalents:
	Cash flows from operating activities:
	Net income	$	39,812			37,534			33,087
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed earnings of subsidiaries		(16,387	)		(13,833	)		(14,235	)
	Stock based compensation expense		378			405			287
	Net gain on securities transactions		-			-			(45	)
	Net change in other assets and accrued expenses		277			(158	)		(232	)
	Total adjustments		(15,732	)		(13,586	)		(14,225	)
	Net cash provided by operating activities		24,080			23,948			18,862
	Cash flows from investing activities:
	Proceeds from sale of securities available for sale		-			-			372
	Investment in bank subsidiary		-			-			(67,000	)
	Purchases of securities available for sale		-			-			(68	)
	Net cash used in investing activities		-			-			(66,696	)
	Cash flows from financing activities:
	Proceeds from exercise of stock options and related tax benefits		36			-			-
	Dividends paid		(24,711	)		(24,574	)		(21,320	)
	Net proceeds from common stock offering		-			-			67,578
	Proceeds from sales of treasury stock		2,908			2,913			2,900
	Net cash provided by (used in) financing activities		(21,767	)		(21,661	)		49,158
	Net increase in cash and cash equivalents		2,313			2,287			1,324
	Cash and cash equivalents at beginning of year		12,950			10,663			9,339
	Cash and cash equivalents at end of year	$	15,263			12,950			10,663

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
	Segment
	Payment
Basis of Presentation [Abstract]	'	'
Number of past due payments on loans classified as nonperforming	3	'
Non-payment period of loans moved to non-accrual status	'90 days	'
Actual net loss history period used in determining historical loss	'4 years	'
Loan-to-value ratio applicable to additional allowance (in hundredths)	90.00%	'
Other real estate owned	$8.70	$8.70
Undistributed earnings	$30.20	'
Age under which retirees can participate in company's medical plan	'65 years	'
Age at which company provides access to Medicare Supplemental program for retirees	'65 years	'
Number of reportable segment	1	'
Building [Member] | Minimum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Useful Life	'20 years	'
Building [Member] | Maximum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Useful Life	'40 years	'
Furniture and Equipment [Member] | Minimum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Useful Life	'3 years	'
Furniture and Equipment [Member] | Maximum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Useful Life	'7 years	'

Balances_at_Other_Banks_Detail

Balances at Other Banks (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Balances at Other Banks [Abstract]	'	'
Balances at Other Banks	$83.60	$75.70

Investment_Securities_Availabl

Investment Securities, Available-for-sale Securities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	$893,821	$905,846
Gross Unrealized Gains	467	6,903
Gross Unrealized Losses	30,534	657
Total securities available for sale	863,754	912,092
U. S. government sponsored enterprises [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	200,531	262,063
Gross Unrealized Gains	22	1,055
Gross Unrealized Losses	1,724	10
Total securities available for sale	198,829	263,108
State and political subdivisions [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	7,623	25,815
Gross Unrealized Gains	135	642
Gross Unrealized Losses	0	0
Total securities available for sale	7,758	26,457
Mortgage-backed securities and collateralized mortgage obligations-residential [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	552,230	515,322
Gross Unrealized Gains	267	3,982
Gross Unrealized Losses	20,048	528
Total securities available for sale	532,449	518,776
Corporate bonds [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	10,429	26,312
Gross Unrealized Gains	43	336
Gross Unrealized Losses	1	119
Total securities available for sale	10,471	26,529
Small Business Administration-guaranteed participation securities [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	111,383	75,674
Gross Unrealized Gains	0	888
Gross Unrealized Losses	8,354	0
Total securities available for sale	103,029	76,562
Mortgage-backed securities and collateralized mortgage obligations-Commercial [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	10,965	'
Gross Unrealized Gains	0	'
Gross Unrealized Losses	407	'
Total securities available for sale	10,558	'
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
Total securities available for sale	650	650
Debt securities [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	893,811	905,836
Gross Unrealized Gains	467	6,903
Gross Unrealized Losses	30,534	657
Total securities available for sale	863,744	912,082
Equity securities [Member]	'	'
Amortized cost and fair value of the securities available for sale [Abstract]	'	'
Amortized Cost	10	10
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total securities available for sale	$10	$10

Investment_Securities_Availabl1

Investment Securities, Available-for-sale Securities, Maturities (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Amortized Cost [Abstract]	'
Due in one year or less	$11,221
Due in one year through five years	359,564
Due after five years through ten years	520,721
Due after ten years	2,305
Amortized Cost	893,811
Fair Value [Abstract]	'
Due in one year or less	11,284
Due in one year through five years	355,727
Due after five years through ten years	494,395
Due after ten years	2,338
Available for sale debt securities, fair value	$863,744

Investment_Securities_Availabl2

Investment Securities, Available-for-sale Securities, Gross Unrealized Loss Position (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Available for sale securities unrealized loss position - Fair Value [Abstract]	'	'
Less than 12 months - Fair Value	$778,568	$204,463
12 months or more - Fair Value	54,835	0
Total - Fair Value	833,403	204,463
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]	'	'
Less than 12 months - Gross Unrealized Loss	28,184	657
12 months or more - Gross Unrealized Loss	2,350	0
Total - Gross Unrealized Loss	30,534	657
U. S. government sponsored enterprises [Member]	'	'
Available for sale securities unrealized loss position - Fair Value [Abstract]	'	'
Less than 12 months - Fair Value	198,023	15,491
12 months or more - Fair Value	0	0
Total - Fair Value	198,023	15,491
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]	'	'
Less than 12 months - Gross Unrealized Loss	1,724	10
12 months or more - Gross Unrealized Loss	0	0
Total - Gross Unrealized Loss	1,724	10
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	466,056	178,689
12 months or more - Fair Value	54,835	0
Total - Fair Value	520,891	178,689
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]	'	'
Less than 12 months - Gross Unrealized Loss	17,698	528
12 months or more - Gross Unrealized Loss	2,350	0
Total - Gross Unrealized Loss	20,048	528
Corporate bonds [Member]	'	'
Available for sale securities unrealized loss position - Fair Value [Abstract]	'	'
Less than 12 months - Fair Value	902	10,283
12 months or more - Fair Value	0	0
Total - Fair Value	902	10,283
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]	'	'
Less than 12 months - Gross Unrealized Loss	1	119
12 months or more - Gross Unrealized Loss	0	0
Total - Gross Unrealized Loss	1	119
Small Business Administration-guaranteed participation securities [Member]	'	'
Available for sale securities unrealized loss position - Fair Value [Abstract]	'	'
Less than 12 months - Fair Value	103,029	'
12 months or more - Fair Value	0	'
Total - Fair Value	103,029	'
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]	'	'
Less than 12 months - Gross Unrealized Loss	8,354	'
12 months or more - Gross Unrealized Loss	0	'
Total - Gross Unrealized Loss	8,354	'
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	10,558	'
12 months or more - Fair Value	0	'
Total - Fair Value	10,558	'
Available for sale securities unrealized loss position - Gross Unrealized Loss [Abstract]	'	'
Less than 12 months - Gross Unrealized Loss	407	'
12 months or more - Gross Unrealized Loss	0	'
Total - Gross Unrealized Loss	$407	'

Investment_Securities_Availabl3

Investment Securities, Available-for-sale Securities, Transaction Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Proceeds from sales and calls of securities available for sale, gross realized gains and gross realized losses [Abstract]	'	'	'
Proceeds from sales	$160,820,000	$154,944,000	$47,296,000
Proceeds from calls	256,384,000	1,049,306,000	1,124,649,000
Gross realized gains	1,702,000	2,584,000	1,472,000
Gross realized losses	80,000	423,000	44,000
Income tax expense recognized on net gains on sales and calls of securities available for sale	649,000	864,000	571,000
Securities available for sale pledged to secure short-term borrowings and for other purposes	$316,700,000	$261,100,000	'

Investment_Securities_Heldtoma

Investment Securities, Held-to-maturity Securities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Amortized cost and fair value of the held to maturity securities [Abstract]	'	'
Amortized Cost	$86,215	$143,426
Gross Unrecognized Gains	4,228	7,700
Gross Unrecognized Losses	138	0
Fair Value	90,305	151,126
Mortgage-backed securities and collateralized mortgage obligations-residential [Member]	'	'
Amortized cost and fair value of the held to maturity securities [Abstract]	'	'
Amortized Cost	76,270	108,471
Gross Unrecognized Gains	2,744	5,724
Gross Unrecognized Losses	138	0
Fair Value	78,876	114,195
Corporate bonds [Member]	'	'
Amortized cost and fair value of the held to maturity securities [Abstract]	'	'
Amortized Cost	9,945	34,955
Gross Unrecognized Gains	1,484	1,976
Gross Unrecognized Losses	0	0
Fair Value	$11,429	$36,931

Investment_Securities_Heldtoma1

Investment Securities, Held-to-maturity Securities, Maturity (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Amortized Cost [Abstract]	'
Due in one year or less	$0
Due in one year through five years	86,215
Due in five years through ten years	0
Amortized Cost	86,215
Fair Value [Abstract]	'
Due in one year or less	0
Due in one year through five years	90,305
Due in five years through ten years	0
Fair Value	$90,305

Investment_Securities_Heldtoma2

Investment Securities, Held-to-maturity Securities, Loss Position (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Held to maturity unrecognized loss position - Fair Value [Abstract]	'
Less than 12 months - Fair Value	$27,091
12 months or more - Fair Value	0
Total - Fair Value	27,091
Held to maturity unrecognized loss position - Gross Unrec. Loss [Abstract]	'
Less than 12 months - Gross Unrec. Loss	138
12 months or more - Gross Unrec. Loss	0
Total - Gross Unrec. Loss	138
Mortgage-backed securities and collateralized mortgage obligations-residential [Member]	'
Held to maturity unrecognized loss position - Fair Value [Abstract]	'
Less than 12 months - Fair Value	27,091
12 months or more - Fair Value	0
Total - Fair Value	27,091
Held to maturity unrecognized loss position - Gross Unrec. Loss [Abstract]	'
Less than 12 months - Gross Unrec. Loss	138
12 months or more - Gross Unrec. Loss	0
Total - Gross Unrec. Loss	$138

Investment_Securities_Concentr

Investment Securities, Concentrations (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Small Business Administration [Member]	'
Securities Held In Available For Sale And Held To Maturity Portfolios That Represent Greater Than 10% Of Shareholders Equity [Abstract]	'
Amortized Cost	$111,383
Fair Value, Total	103,029
Federal Home Loan Mortgage Corporation [Member]	'
Securities Held In Available For Sale And Held To Maturity Portfolios That Represent Greater Than 10% Of Shareholders Equity [Abstract]	'
Amortized Cost	159,375
Fair Value, Total	154,492
Government National Mortgage Association [Member]	'
Securities Held In Available For Sale And Held To Maturity Portfolios That Represent Greater Than 10% Of Shareholders Equity [Abstract]	'
Amortized Cost	100,578
Fair Value, Total	101,947
Federal National Mortgage Association [Member]	'
Securities Held In Available For Sale And Held To Maturity Portfolios That Represent Greater Than 10% Of Shareholders Equity [Abstract]	'
Amortized Cost	538,260
Fair Value, Total	$523,070

Investment_Securities_OtherTha

Investment Securities, Other-Than-Temporary-Impairment (Details)	Dec. 31, 2013
	Security
Investment security impairment - Other Than Temporary Impairment [Abstract]	'
Number of securities in portfolio	209
Number of securities in portfolio in unrealized loss position	111

Loans_and_Allowance_for_Loan_L2

Loans and Allowance for Loan Losses (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	$2,908,809,000		$2,684,733,000
Less: Allowance for loan losses	47,714,000		47,927,000
Net loans	2,861,095,000		2,636,806,000
Due from Officers	9,300,000		8,100,000
New loans	2,700,000		'
Repayments of loans	1,500,000		'
Commercial [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	223,481,000		219,577,000
Commercial [Member] | Commercial Real Estate [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	191,126,000		186,131,000
Commercial [Member] | Other [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	32,355,000		33,446,000
Real Estate Mortgage - 1 to 4 Family [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	2,679,433,000		2,460,577,000
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	2,287,808,000		2,089,978,000
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	51,136,000		36,690,000
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	340,489,000		333,909,000
Installment [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	5,895,000		4,579,000
Real Estate Construction Loans [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	35,400,000		37,200,000
Residential Borrowers [Member] | First Mortgages [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	13,900,000		16,400,000
Commercial Borrowers Residential Purpose [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	21,500,000		20,800,000
New York and Other States [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	2,468,322,000	[1]	2,355,966,000	[1]
New York and Other States [Member] | Commercial [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	202,045,000		200,630,000
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	169,722,000	[1]	167,249,000	[1]
New York and Other States [Member] | Commercial [Member] | Other [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	32,323,000	[1]	33,381,000	[1]
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	1,909,447,000	[1]	1,814,214,000	[1]
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	47,494,000	[1]	35,601,000	[1]
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	304,044,000	[1]	301,338,000	[1]
New York and Other States [Member] | Installment [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	5,292,000	[1]	4,183,000	[1]
Florida [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	440,487,000		328,767,000
Florida [Member] | Commercial [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	21,436,000		18,947,000
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	21,404,000		18,882,000
Florida [Member] | Commercial [Member] | Other [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	32,000		65,000
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	378,361,000		275,764,000
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	3,642,000		1,089,000
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	36,445,000		32,571,000
Florida [Member] | Installment [Member]	'		'
Loans and Leases Receivable, Net Amount [Abstract]	'		'
Total loans, net	$603,000		$396,000
[1]	Includes New York, New Jersey, Vermont, and Massachusetts.

Loans_and_Allowance_for_Loan_L3

Loans and Allowance for Loan Losses, Non-accrual Loans, By Loan Class (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	$43,227	$52,446
Restructured real estate mortgages - 1 to 4 family	166	231
Total nonperforming loans	43,393	52,677
Commercial [Member] | Commercial Real Estate [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	6,620	9,209
Commercial [Member] | Other [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	332	124
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	31,494	37,648
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	691	694
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	3,997	4,764
Installment [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	93	7
New York and Other States [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	38,090	41,927
Restructured real estate mortgages - 1 to 4 family	166	231
Total nonperforming loans	38,256	42,158
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	6,620	6,511
New York and Other States [Member] | Commercial [Member] | Other [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	332	124
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	26,713	30,329
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	691	694
New York and Other States [Member] | 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	3,641	4,263
New York and Other States [Member] | Installment [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	93	6
Florida [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	5,137	10,519
Restructured real estate mortgages - 1 to 4 family	0	0
Total nonperforming loans	5,137	10,519
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	0	2,698
Florida [Member] | Commercial [Member] | Other [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	0	0
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	4,781	7,319
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	0	0
Florida [Member] | 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	356	501
Florida [Member] | Installment [Member]	'	'
Non accrual loans by loan class [Abstract]	'	'
Total non-accrual loans	$0	$1

Loans_and_Allowance_for_Loan_L4

Loans and Allowance for Loan Losses, Past Due (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	$7,262		$8,115
60-89 Days Past Due	3,831		3,322
90+ Days Past Due	28,128		36,609
Total 30+ days Past Due	39,221		48,046
Current	2,869,588		2,636,687
Total loans	2,908,809		2,684,733
Loans that are 90 days past due and still accruing interest	0		0
Number of days past due	'90 days		'
Commercial [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
Total loans	223,481		219,577
Commercial [Member] | Commercial Real Estate [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	583		0
60-89 Days Past Due	1,426		0
90+ Days Past Due	3,379		5,923
Total 30+ days Past Due	5,388		5,923
Current	185,738		180,208
Total loans	191,126		186,131
Commercial [Member] | Other [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	209		0
60-89 Days Past Due	0		0
90+ Days Past Due	123		4
Total 30+ days Past Due	332		4
Current	32,023		33,442
Total loans	32,355		33,446
Real Estate Mortgage - 1 to 4 Family [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
Total loans	2,679,433		2,460,577
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	5,216		7,226
60-89 Days Past Due	2,042		2,700
90+ Days Past Due	21,853		26,731
Total 30+ days Past Due	29,111		36,657
Current	2,258,697		2,053,321
Total loans	2,287,808		2,089,978
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	46		177
60-89 Days Past Due	18		216
90+ Days Past Due	552		464
Total 30+ days Past Due	616		857
Current	50,520		35,833
Total loans	51,136		36,690
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	1,123		663
60-89 Days Past Due	331		379
90+ Days Past Due	2,144		3,486
Total 30+ days Past Due	3,598		4,528
Current	336,891		329,381
Total loans	340,489		333,909
Installment [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	85		49
60-89 Days Past Due	14		27
90+ Days Past Due	77		1
Total 30+ days Past Due	176		77
Current	5,719		4,502
Total loans	5,895		4,579
New York and Other States [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	6,601		7,185
60-89 Days Past Due	3,829		2,841
90+ Days Past Due	23,652		28,078
Total 30+ days Past Due	34,082		38,104
Current	2,434,240		2,317,862
Total loans	2,468,322	[1]	2,355,966	[1]
New York and Other States [Member] | Commercial [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
Total loans	202,045		200,630
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	583		0
60-89 Days Past Due	1,426		0
90+ Days Past Due	3,379		3,225
Total 30+ days Past Due	5,388		3,225
Current	164,334		164,024
Total loans	169,722	[1]	167,249	[1]
New York and Other States [Member] | Commercial [Member] | Other [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	209		0
60-89 Days Past Due	0		0
90+ Days Past Due	123		4
Total 30+ days Past Due	332		4
Current	31,991		33,377
Total loans	32,323	[1]	33,381	[1]
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	4,664		6,364
60-89 Days Past Due	2,042		2,248
90+ Days Past Due	17,624		21,341
Total 30+ days Past Due	24,330		29,953
Current	1,885,117		1,784,261
Total loans	1,909,447	[1]	1,814,214	[1]
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	46		177
60-89 Days Past Due	18		216
90+ Days Past Due	552		464
Total 30+ days Past Due	616		857
Current	46,878		34,744
Total loans	47,494	[1]	35,601	[1]
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	1,014		604
60-89 Days Past Due	331		350
90+ Days Past Due	1,897		3,044
Total 30+ days Past Due	3,242		3,998
Current	300,802		297,340
Total loans	304,044	[1]	301,338	[1]
New York and Other States [Member] | Installment [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	85		40
60-89 Days Past Due	12		27
90+ Days Past Due	77		0
Total 30+ days Past Due	174		67
Current	5,118		4,116
Total loans	5,292	[1]	4,183	[1]
Florida [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	661		930
60-89 Days Past Due	2		481
90+ Days Past Due	4,476		8,531
Total 30+ days Past Due	5,139		9,942
Current	435,348		318,825
Total loans	440,487		328,767
Florida [Member] | Commercial [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
Total loans	21,436		18,947
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	0		0
60-89 Days Past Due	0		0
90+ Days Past Due	0		2,698
Total 30+ days Past Due	0		2,698
Current	21,404		16,184
Total loans	21,404		18,882
Florida [Member] | Commercial [Member] | Other [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	0		0
60-89 Days Past Due	0		0
90+ Days Past Due	0		0
Total 30+ days Past Due	0		0
Current	32		65
Total loans	32		65
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	552		862
60-89 Days Past Due	0		452
90+ Days Past Due	4,229		5,390
Total 30+ days Past Due	4,781		6,704
Current	373,580		269,060
Total loans	378,361		275,764
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	0		0
60-89 Days Past Due	0		0
90+ Days Past Due	0		0
Total 30+ days Past Due	0		0
Current	3,642		1,089
Total loans	3,642		1,089
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	109		59
60-89 Days Past Due	0		29
90+ Days Past Due	247		442
Total 30+ days Past Due	356		530
Current	36,089		32,041
Total loans	36,445		32,571
Florida [Member] | Installment [Member]	'		'
Aging of the recorded investment in past due loans [Abstract]	'		'
30-59 Days Past Due	0		9
60-89 Days Past Due	2		0
90+ Days Past Due	0		1
Total 30+ days Past Due	2		10
Current	601		386
Total loans	$603		$396
[1]	Includes New York, New Jersey, Vermont, and Massachusetts.

Loans_and_Allowance_for_Loan_L5

Loans and Allowance for Loan Losses, Allowance for Loan Losses (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for loan losses by portfolio segment [Roll Forward]	'	'	'
Balance at beginning of period	$47,927	$48,717	$41,911
Loans charged off [Abstract]	'	'	'
Total loan charge offs	8,838	13,479	12,558
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	1,625	689	614
Net loans charged off	7,213	12,790	11,944
Provision for loan losses	7,000	12,000	18,750
Balance at end of period	47,714	47,927	48,717
Commercial [Member]	'	'	'
Allowance for loan losses by portfolio segment [Roll Forward]	'	'	'
Balance at beginning of period	3,771	4,140	4,228
Loans charged off [Abstract]	'	'	'
Total loan charge offs	1,172	2,499	1,171
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	519	138	59
Net loans charged off	653	2,361	1,112
Provision for loan losses	901	1,992	1,024
Balance at end of period	4,019	3,771	4,140
Real Estate Mortgage - 1 to 4 Family [Member]	'	'	'
Allowance for loan losses by portfolio segment [Roll Forward]	'	'	'
Balance at beginning of period	44,069	44,479	37,447
Loans charged off [Abstract]	'	'	'
Total loan charge offs	7,592	10,839	11,305
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	1,089	502	511
Net loans charged off	6,503	10,337	10,794
Provision for loan losses	6,031	9,927	17,826
Balance at end of period	43,597	44,069	44,479
Installment [Member]	'	'	'
Allowance for loan losses by portfolio segment [Roll Forward]	'	'	'
Balance at beginning of period	87	98	236
Loans charged off [Abstract]	'	'	'
Total loan charge offs	74	141	82
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	17	49	44
Net loans charged off	57	92	38
Provision for loan losses	68	81	-100
Balance at end of period	98	87	98
New York and Other States [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	7,712	8,354	4,566
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	746	536	575
New York and Other States [Member] | Commercial [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	1,072	1,307	171
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	14	112	55
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	6,572	6,919	4,315
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	715	375	477
New York and Other States [Member] | Installment [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	68	128	80
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	17	49	43
Florida [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	1,126	5,125	7,992
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	879	153	39
Florida [Member] | Commercial [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	100	1,192	1,000
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	505	26	4
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	1,020	3,920	6,990
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	374	127	34
Florida [Member] | Installment [Member]	'	'	'
Loans charged off [Abstract]	'	'	'
Total loan charge offs	6	13	2
Recoveries of loans previously charged off [Abstract]	'	'	'
Total recoveries	$0	$0	$1

Loans_and_Allowance_for_Loan_L6

Loans and Allowance for Loan Losses, Based on Impairment Review Method (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Allowance for loan losses [Abstract]	'		'		'	'
Individually evaluated for impairment	$0		$0		'	'
Collectively evaluated for impairment	47,714		47,927		'	'
Total ending allowance balance	47,714		47,927		48,717	41,911
Loans [Abstract]	'		'		'	'
Individually evaluated for impairment	29,340		26,073		'	'
Collectively evaluated for impairment	2,879,469		2,658,660		'	'
Total ending loans balance	2,908,809		2,684,733		'	'
Commercial [Member]	'		'		'	'
Allowance for loan losses [Abstract]	'		'		'	'
Individually evaluated for impairment	0		0		'	'
Collectively evaluated for impairment	4,019		3,771		'	'
Total ending allowance balance	4,019		3,771		4,140	4,228
Loans [Abstract]	'		'		'	'
Individually evaluated for impairment	8,082		9,333		'	'
Collectively evaluated for impairment	215,399		210,244		'	'
Total ending loans balance	223,481		219,577		'	'
Real Estate Mortgage - 1 to 4 Family [Member]	'		'		'	'
Allowance for loan losses [Abstract]	'		'		'	'
Individually evaluated for impairment	0		0		'	'
Collectively evaluated for impairment	43,597		44,069		'	'
Total ending allowance balance	43,597		44,069		44,479	37,447
Loans [Abstract]	'		'		'	'
Individually evaluated for impairment	21,258		16,740		'	'
Collectively evaluated for impairment	2,658,175		2,443,837		'	'
Total ending loans balance	2,679,433		2,460,577		'	'
Installment [Member]	'		'		'	'
Allowance for loan losses [Abstract]	'		'		'	'
Individually evaluated for impairment	0		0		'	'
Collectively evaluated for impairment	98		87		'	'
Total ending allowance balance	98		87		98	236
Loans [Abstract]	'		'		'	'
Individually evaluated for impairment	0		0		'	'
Collectively evaluated for impairment	5,895		4,579		'	'
Total ending loans balance	5,895		4,579		'	'
New York and Other States [Member]	'		'		'	'
Loans [Abstract]	'		'		'	'
Total ending loans balance	2,468,322	[1]	2,355,966	[1]	'	'
New York and Other States [Member] | Commercial [Member]	'		'		'	'
Loans [Abstract]	'		'		'	'
Total ending loans balance	202,045		200,630		'	'
New York and Other States [Member] | Installment [Member]	'		'		'	'
Loans [Abstract]	'		'		'	'
Total ending loans balance	5,292	[1]	4,183	[1]	'	'
Florida [Member]	'		'		'	'
Loans [Abstract]	'		'		'	'
Total ending loans balance	440,487		328,767		'	'
Florida [Member] | Commercial [Member]	'		'		'	'
Loans [Abstract]	'		'		'	'
Total ending loans balance	21,436		18,947		'	'
Florida [Member] | Installment [Member]	'		'		'	'
Loans [Abstract]	'		'		'	'
Total ending loans balance	$603		$396		'	'
[1]	Includes New York, New Jersey, Vermont, and Massachusetts.

Loans_and_Allowance_for_Loan_L7

Loans and Allowance for Loan Losses, Impaired Receivables (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	$29,340	$26,073	$13,711
Unpaid Principal Balance	32,595	30,566	19,632
Related Allowance	0	0	0
Average Recorded Investment	26,683	19,358	13,985
Commercial [Member] | Commercial Real Estate [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	7,750	9,209	9,968
Unpaid Principal Balance	9,169	11,059	14,726
Related Allowance	0	0	0
Average Recorded Investment	7,414	11,486	11,972
Commercial [Member] | Other [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	332	124	13
Unpaid Principal Balance	332	124	32
Related Allowance	0	0	0
Average Recorded Investment	165	107	56
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	17,887	14,436	3,579
Unpaid Principal Balance	19,275	16,808	4,600
Related Allowance	0	0	0
Average Recorded Investment	16,317	7,023	1,888
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	561	623	151
Unpaid Principal Balance	614	664	199
Related Allowance	0	0	0
Average Recorded Investment	636	260	69
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	2,810	1,681	0
Unpaid Principal Balance	3,205	1,911	75
Related Allowance	0	0	0
Average Recorded Investment	2,151	482	0
New York and Other States [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	26,298	21,855	8,006
Unpaid Principal Balance	29,163	23,835	9,289
Related Allowance	0	0	0
Average Recorded Investment	23,571	12,515	6,987
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	6,620	6,511	4,968
Unpaid Principal Balance	8,039	7,169	5,684
Related Allowance	0	0	0
Average Recorded Investment	6,013	5,615	5,198
New York and Other States [Member] | Commercial [Member] | Other [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	332	124	13
Unpaid Principal Balance	332	124	32
Related Allowance	0	0	0
Average Recorded Investment	165	107	56
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	16,257	12,964	2,874
Unpaid Principal Balance	17,353	14,143	3,299
Related Allowance	0	0	0
Average Recorded Investment	14,706	6,075	1,664
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	561	623	151
Unpaid Principal Balance	614	664	199
Related Allowance	0	0	0
Average Recorded Investment	636	260	69
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	2,528	1,633	0
Unpaid Principal Balance	2,825	1,735	75
Related Allowance	0	0	0
Average Recorded Investment	2,051	458	0
Florida [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	3,042	4,218	5,705
Unpaid Principal Balance	3,432	6,731	10,343
Related Allowance	0	0	0
Average Recorded Investment	3,112	6,843	6,998
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	1,130	2,698	5,000
Unpaid Principal Balance	1,130	3,890	9,042
Related Allowance	0	0	0
Average Recorded Investment	1,401	5,871	6,774
Florida [Member] | Commercial [Member] | Other [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Recorded Investment	0	0	0
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	1,630	1,472	705
Unpaid Principal Balance	1,922	2,665	1,301
Related Allowance	0	0	0
Average Recorded Investment	1,611	948	224
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	0	'	'
Unpaid Principal Balance	0	'	'
Related Allowance	0	'	'
Average Recorded Investment	0	'	'
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'	'	'
Impaired loans by loans class [Abstract]	'	'	'
Recorded Investment	282	48	'
Unpaid Principal Balance	380	176	'
Related Allowance	0	0	'
Average Recorded Investment	$100	$24	'

Loans_and_Allowance_for_Loan_L8

Loans and Allowance for Loan Losses, Troubled Debt Restructurings (Details) (USD $)

9 Months Ended

12 Months Ended

Sep. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

New York and Other States [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Florida [Member]

Contract

Contract

Contract

Commercial [Member]

Commercial [Member]

Commercial [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Contract

Contract

Contract

Commercial [Member]

Commercial [Member]

Commercial [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Real Estate Mortgage - 1 to 4 Family [Member]

Commercial Real Estate [Member]

Commercial Real Estate [Member]

Commercial Real Estate [Member]

First Mortgages [Member]

First Mortgages [Member]

First Mortgages [Member]

Home Equity Loans [Member]

Home Equity Loans [Member]

Home Equity Loans [Member]

Home Equity Lines of Credit [Member]

Home Equity Lines of Credit [Member]

Home Equity Lines of Credit [Member]

Commercial Real Estate [Member]

Commercial Real Estate [Member]

Commercial Real Estate [Member]

First Mortgages [Member]

First Mortgages [Member]

First Mortgages [Member]

Home Equity Lines of Credit [Member]

Home Equity Lines of Credit [Member]

Home Equity Lines of Credit [Member]

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Contract

Financing Receivable, Modifications [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

TDR's classifications from previously performing loans

$4,000,000

$8,600,000

$10,600,000

$10,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Collateral deficiency charge-offs for TDR's reclassifications

804,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Modified loans by class determined to be TDR's [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of Contracts

'

'

'

'

71

143

26

1

2

1

50

95

21

7

16

4

13

30

0

11

14

6

0

0

0

8

12

6

3

2

0

Pre-Modification Outstanding Recorded Investment

'

'

'

'

7,540,000

12,895,000

3,009,000

507,000

138,000

91,000

5,852,000

10,636,000

2,758,000

120,000

488,000

160,000

1,061,000

1,633,000

0

1,431,000

1,313,000

852,000

0

0

0

1,149,000

1,265,000

852,000

282,000

48,000

0

Post-Modification Outstanding Recorded Investment

'

'

'

'

$7,540,000

$12,895,000

$2,759,000

$507,000

$138,000

$90,000

$5,852,000

$10,636,000

$2,518,000

$120,000

$488,000

$151,000

$1,061,000

$1,633,000

$0

$1,431,000

$1,313,000

$705,000

$0

$0

$0

$1,149,000

$1,265,000

$705,000

$282,000

$48,000

$0

Loans_and_Allowance_for_Loan_L9

Loans and Allowance for Loan Losses, Modified Loans Payment Status (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Contract	Contract	Contract
Loans modified for which there was payment default [Abstract]	'	'	'
Deferral period of past due loans	'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	'	'
Non-homogeneous loans over	$150	'	'
Internal grading of non-homogeneous loans over	250	'	'
New York and Other States [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	7	29	17
Recorded Investment	540	2,487	1,932
New York and Other States [Member] | Commercial [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	0	0	1
Recorded Investment	0	0	90
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	5	22	13
Recorded Investment	440	2,265	1,729
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	1	2	3
Recorded Investment	44	13	113
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	1	5	0
Recorded Investment	56	209	0
Florida [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	0	7	6
Recorded Investment	0	652	705
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	0	6	6
Recorded Investment	0	605	705
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]	'	'	'
Loans modified for which there was payment default [Abstract]	'	'	'
Number of Contracts	0	1	0
Recorded Investment	$0	$47	$0

Recovered_Sheet1

Loans and Allowance for Loan Losses, Risk Category of Loans (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	$2,908,809,000		$2,684,733,000
Impaired loans included in classified loans	8,100,000		9,300,000
Commercial [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	223,481,000		219,577,000
Commercial [Member] | Commercial Real Estate [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	191,126,000		186,131,000
Commercial [Member] | Other [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	32,355,000		33,446,000
New York and Other States [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	2,468,322,000	[1]	2,355,966,000	[1]
New York and Other States [Member] | Commercial [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	202,045,000		200,630,000
New York and Other States [Member] | Commercial [Member] | Pass [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	190,715,000		189,048,000
New York and Other States [Member] | Commercial [Member] | Classified [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	11,330,000		11,582,000
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	169,722,000	[1]	167,249,000	[1]
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member] | Pass [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	159,024,000		155,981,000
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member] | Classified [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	10,698,000		11,268,000
New York and Other States [Member] | Commercial [Member] | Other [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	32,323,000	[1]	33,381,000	[1]
New York and Other States [Member] | Commercial [Member] | Other [Member] | Pass [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	31,691,000		33,067,000
New York and Other States [Member] | Commercial [Member] | Other [Member] | Classified [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	632,000		314,000
Florida [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	440,487,000		328,767,000
Florida [Member] | Commercial [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	21,436,000		18,947,000
Florida [Member] | Commercial [Member] | Pass [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	20,306,000		12,519,000
Florida [Member] | Commercial [Member] | Classified [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	1,130,000		6,428,000
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	21,404,000		18,882,000
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member] | Pass [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	20,274,000		12,454,000
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member] | Classified [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	1,130,000		6,428,000
Florida [Member] | Commercial [Member] | Other [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	32,000		65,000
Florida [Member] | Commercial [Member] | Other [Member] | Pass [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	32,000		65,000
Florida [Member] | Commercial [Member] | Other [Member] | Classified [Member]	'		'
Financing Receivable, Recorded Investment [Line Items]	'		'
Total loans, net	$0		$0
[1]	Includes New York, New Jersey, Vermont, and Massachusetts.

Bank_Premises_and_Equipment_De

Bank Premises and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]	'	'	'
Total bank premises and Equipment	$101,511,000	$98,703,000	'
Accumulated depreciation and amortization	-67,097,000	-62,464,000	'
Total	34,414,000	36,239,000	'
Depreciation and amortization expense	5,017,000	5,032,000	4,836,000
Rental expense of the Bank's premises incurred during the period in accordance with certain operating leases	7,200,000	6,900,000	6,800,000
Land [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total bank premises and Equipment	2,413,000	2,413,000	'
Building [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total bank premises and Equipment	30,010,000	29,584,000	'
Furniture, Fixtures and Equipment [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total bank premises and Equipment	43,697,000	42,636,000	'
Leasehold Improvements [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Total bank premises and Equipment	$25,391,000	$24,070,000	'

Deposits_Details

Deposits (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Expense, Deposits [Abstract]	'	'	'
Interest bearing checking accounts	$329	$315	$285
Savings accounts	3,333	3,872	3,788
Time deposits and money market accounts	10,138	14,313	20,597
Total interest expense	13,800	18,500	24,670
Maturities of Time Deposits [Abstract]	'	'	'
Under 1 year	923,033	'	'
1 to 2 years	141,394	'	'
2 to 3 years	57,431	'	'
3 to 4 years	4,712	'	'
4 to 5 years	4,353	'	'
Over 5 years	125	'	'
Time Deposits, Total	$1,131,048	'	'

ShortTerm_Borrowings_Details

Short-Term Borrowings (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Short-term Debt [Line Items]	'	'	'
Amount outstanding at end of year	$204,162	$159,846	'
Cash Management [Member]	'	'	'
Short-term Debt [Line Items]	'	'	'
Amount outstanding at end of year	204,162	159,846	147,563
Maximum amount outstanding at any month end	204,162	166,374	148,002
Average amount outstanding	$180,275	$152,982	$133,803
Weighted average interest rate, For the year (in hundredths)	0.82%	0.96%	1.18%
Weighted average interest rate, As of year end (in hundredths)	0.82%	0.89%	1.13%

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current tax expense:	'	'	'
Federal	$22,612,000	$19,122,000	$19,614,000
State	2,531,000	1,879,000	2,020,000
Total current tax expense	25,143,000	21,001,000	21,634,000
Deferred tax expense (benefit)	-1,426,000	1,440,000	-2,336,000
Total income tax expense	23,717,000	22,441,000	19,298,000
Components of deferred tax assets and liabilities [Abstract]	'	'	'
Benefits and deferred remuneration	-4,256,000	-4,736,000	'
Difference in reporting the allowance for loan losses, net	22,774,000	22,710,000	'
Other income or expense not yet reported for tax purposes	3,008,000	2,582,000	'
Depreciable assets	-1,309,000	-1,413,000	'
Other items	1,153,000	801,000	'
Net deferred tax assets at end of year	21,370,000	19,944,000	21,384,000
Net deferred tax assets at beginning of year	19,944,000	21,384,000	'
Deferred tax expense (benefit)	-1,426,000	1,440,000	-2,336,000
Deferred tax liability, unrealized gains on available-for-sale securities	'	2,500,000	'
Deferred tax assets, unrealized losses on available-for-sale securities	12,000,000	'	'
Deferred tax assets, unrecognized overfunded position in company's pension and postretirement benefit plans	'	1,500,000	'
Deferred tax liability, unrecognized overfunded position in company's pension and postretirement benefit plans	2,800,000	'	'
Reconciliation from statutory federal income tax rate to effective tax rate [Abstract]	'	'	'
Statutory federal income tax rate (in hundredths)	35.00%	35.00%	35.00%
Increase/(decrease) in taxes resulting from: [Abstract]	'	'	'
Tax exempt income (in hundredths)	-0.30%	-0.70%	-1.60%
State income tax (including alternative minimum tax),net of federal tax benefit	2.30%	2.30%	2.00%
Other items (in hundredths)	0.30%	0.80%	1.40%
Effective income tax rate (in hundredths)	37.30%	37.40%	36.80%
Unrecognized pre-tax benefit and changes in those benefits [Roll Forward]	'	'	'
Unrecognized tax benefit, beginning balance	213,000	905,000	'
Decrease in prior unrecognized tax benefits	0	-342,000	'
Lapse of statute of limitations	'	-350,000	'
Unrecognized tax benefit, ending balance	$213,000	$213,000	$905,000
Federal [Member] | Minimum [Member]	'	'	'
Open Tax Years [Abstract]	'	'	'
Open tax year	'2008	'	'
Federal [Member] | Maximum [Member]	'	'	'
Open Tax Years [Abstract]	'	'	'
Open tax year	'2013	'	'
New York State [Member] | Minimum [Member]	'	'	'
Open Tax Years [Abstract]	'	'	'
Open tax year	'2008	'	'
New York State [Member] | Maximum [Member]	'	'	'
Open Tax Years [Abstract]	'	'	'
Open tax year	'2013	'	'

Benefit_Plans_Details

Benefit Plans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	H
Retirement Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Requisite minimum period of employment	'1 year	'	'
Requisite minimum hours of service (in hours)	1,000	'	'
Number of consecutive years in highest compensation preceding retirement	'5 years	'	'
Period preceding retirement considered in calculating benefits	'10 years	'	'
Change in benefit obligation: [Roll Forward]	'	'	'
Projected benefit obligation at beginning of year	$31,990	$29,283	'
Service cost	69	55	45
Interest cost	1,273	1,426	1,515
Benefits paid	-2,045	-2,036	'
Net actuarial loss (gain)	-3,465	3,262	'
Projected benefit obligation at end of year	27,822	31,990	29,283
Post-Retirement Benefits Plan [Member]	'	'	'
Change in benefit obligation: [Roll Forward]	'	'	'
Service cost	50	33	26
Interest cost	101	97	98
Benefits paid	-60	-48	'
Net actuarial loss (gain)	($456)	$323	'

Benefit_Plans_Plan_Discosures_

Benefit Plans, Plan Discosures (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Retirement Plan [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets at beginning of year	$34,584	$30,278	'
Actual gain on plan assets	6,880	3,342	'
Company contributions	0	3,000	'
Benefits paid	-2,045	-2,036	'
Fair value of plan assets	39,419	34,584	30,278
Funded status at end of year	11,597	2,593	'
Amounts recognized in accumulated other comprehensive income: [Abstract]	'	'	'
Net actuarial loss	813	9,486	'
Components of the net periodic pension income and other amounts recognized in other comprehensive income: [Abstract]	'	'	'
Service Cost	69	55	45
Interest cost	1,273	1,426	1,515
Expected return on plan assets	-2,190	-1,912	-1,985
Amortization of net actuarial loss	516	335	156
Net periodic pension income	-332	-96	-269
Amortization of net actuarial loss	-516	-335	-156
Net actuarial (gain) / loss included in other comprehensive income	-8,156	1,834	3,689
Total amount recognized in other comprehensive income	-8,672	1,499	3,533
Total recognized in net periodic benefit income and other comprehensive income	-9,004	1,401	3,264
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year	0	'	'
Retirement Plan [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	39,419	34,584	'
Retirement Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	29,811	25,384	'
Retirement Plan [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	9,608	9,200	'
Retirement Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	1,916	2,114	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	1,916	2,114	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	27,296	22,599	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	27,296	22,599	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	5,091	4,574	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	5,091	4,574	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Corporate Bonds [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	4,517	4,626	'
Retirement Plan [Member] | Corporate Bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	4,517	4,626	'
Retirement Plan [Member] | Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	599	671	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	599	671	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets at beginning of year	15,026	13,662	'
Actual gain on plan assets	2,909	1,364	'
Company contributions	60	48	'
Benefits paid	-60	-48	'
Fair value of plan assets	17,935	15,026	13,662
Funded status at end of year	15,422	12,613	'
Amounts recognized in accumulated other comprehensive income: [Abstract]	'	'	'
Net actuarial loss	-4,945	-2,125	'
Prior service credit	-2,979	-3,706	'
Total	-7,924	-5,831	'
Components of the net periodic pension income and other amounts recognized in other comprehensive income: [Abstract]	'	'	'
Service Cost	50	33	26
Interest cost	101	97	98
Expected return on plan assets	-495	-451	-447
Amortization of net actuarial loss	-49	-29	-71
Net periodic pension income	-655	-612	-656
Amortization of net actuarial loss	49	29	71
Net actuarial (gain) / loss included in other comprehensive income	-2,868	-590	531
Total amount recognized in other comprehensive income	-2,092	-299	1,397
Total recognized in net periodic benefit income and other comprehensive income	-2,747	-911	741
Amounts that will be amortized from accumulated other comprehensive income (loss) in next fiscal year	468	'	'
Post-Retirement Benefits Plan [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	17,935	15,026	'
Post-Retirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	13,085	10,866	'
Post-Retirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	4,850	4,160	'
Post-Retirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	950	1,148	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	950	1,148	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	12,135	9,718	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	12,135	9,718	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	1,020	'	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	'	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	1,020	'	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	'	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	3,381	4,160	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	3,381	4,160	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Carrying Value [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	449	'	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	0	'	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	449	'	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Change in plan assets and reconciliation of funded status [Roll Forward]	'	'	'
Fair value of plan assets	$0	'	'

Benefit_Plans_Estimated_Future

Benefit Plans, Estimated Future Benefit Payments and Change in Obligation (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assumptions used to determine net periodic pension expense [Abstract]	'	'	'
Rabbi Trust	$5,700,000	$5,700,000	'
Retirement Plan [Member]	'	'	'
Estimated future benefit payments [Abstract]	'	'	'
2014	1,698,000	'	'
2015	1,720,000	'	'
2016	1,750,000	'	'
2017	1,757,000	'	'
2018	1,780,000	'	'
2019 - 2023	9,141,000	'	'
Assumptions used to determine benefit obligation [Abstract]	'	'	'
Discount rate (in hundredths)	5.08%	4.07%	5.17%
Assumptions used to determine net periodic pension expense [Abstract]	'	'	'
Discount rate (in hundredths)	4.07%	5.17%	5.62%
Expected long-term rate of return on assets (in hundredths)	6.50%	6.50%	6.50%
Change in benefit obligation [Rollforward]	'	'	'
Service cost	69,000	55,000	45,000
Interest cost	1,273,000	1,426,000	1,515,000
Benefits paid	-2,045,000	-2,036,000	'
Net actuarial (gain) loss	-3,465,000	3,262,000	'
Post-Retirement Benefits Plan [Member]	'	'	'
Estimated future benefit payments [Abstract]	'	'	'
2014	56,000	'	'
2015	59,000	'	'
2016	62,000	'	'
2017	65,000	'	'
2018	70,000	'	'
2019 - 2023	510,000	'	'
Assumptions used to determine benefit obligation [Abstract]	'	'	'
Discount rate (in hundredths)	5.08%	4.07%	5.17%
Assumptions used to determine net periodic pension expense [Abstract]	'	'	'
Discount rate (in hundredths)	4.07%	5.17%	5.62%
Expected long-term rate of return on assets (in hundredths)	3.30%	3.30%	3.30%
Age below which retirees are permitted to participate in company medical plan by making certain payments	'65 years	'	'
Age at which the bank provides Medicare Supplemental program to retirees	'65 years	'	'
Change in benefit obligation [Rollforward]	'	'	'
Accumulated benefit obligation at beginning of year	2,413,000	2,008,000	'
Service cost	50,000	33,000	26,000
Interest cost	101,000	97,000	98,000
Plan amendments	465,000	0	'
Benefits paid	-60,000	-48,000	'
Net actuarial (gain) loss	-456,000	323,000	'
Accumulated benefit obligation at end of year	2,513,000	2,413,000	2,008,000
Supplementary Pension Plan [Member]	'	'	'
Assumptions used to determine net periodic pension expense [Abstract]	'	'	'
Accumulated benefit obligation	5,600,000	5,600,000	'
Plan expense	$1,300,000	$823,000	$647,000

Benefit_Plans_Other_Comprehens

Benefit Plans, Other Comprehensive Income Disclosures (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in component of other comprehensive income related to the retirement plan and the post-retirement benefit plan [Abstract]	'	'	'
Change in overfunded position of pension and postretirement benefits	($10,559)	$1,244	$4,753
Amortization of net actuarial gain (loss)	-467	-306	-85
Amortization of prior service credit	262	262	262
Total	-10,764	1,200	'
Retirement Plan [Member]	'	'	'
Components of the net periodic income and other amounts recognized in other comprehensive income [Abstract]	'	'	'
Service Cost	69	55	45
Interest cost	1,273	1,426	1,515
Expected return on plan assets	-2,190	-1,912	-1,985
Amortization of net actuarial gain	516	335	156
Net periodic pension income	-332	-96	-269
Net (gain) loss	-8,156	1,834	3,689
Amortization of net actuarial gain	-516	-335	-156
Total amount recognized in other comprehensive income	-8,672	1,499	3,533
Total amount recognized in net periodic income and other comprehensive income	-9,004	1,401	3,264
Change in component of other comprehensive income related to the retirement plan and the post-retirement benefit plan [Abstract]	'	'	'
Change in overfunded position of pension and postretirement benefits	-8,156	1,834	'
Amortization of net actuarial gain (loss)	-516	-335	'
Amortization of prior service credit	0	0	'
Total	-8,672	1,499	'
Post-Retirement Benefits Plan [Member]	'	'	'
Components of the net periodic income and other amounts recognized in other comprehensive income [Abstract]	'	'	'
Service Cost	50	33	26
Interest cost	101	97	98
Expected return on plan assets	-495	-451	-447
Amortization of net actuarial gain	-49	-29	-71
Amortization of prior service credit	-262	-262	-262
Net periodic pension income	-655	-612	-656
Net (gain) loss	-2,868	-590	531
Prior service cost	465	0	533
Amortization of prior service credit	262	262	262
Amortization of net actuarial gain	49	29	71
Total amount recognized in other comprehensive income	-2,092	-299	1,397
Total amount recognized in net periodic income and other comprehensive income	-2,747	-911	741
Effect of one-percentage point change in assumed health care cost trend rates [Abstract]	'	'	'
Effect of one percentage point increase on in assumed health care cost	500	'	'
Effect of one percentage point decrease on in assumed health care cost	389	'	'
Effect of one percentage point increase on in interest and service components	32	'	'
Effect of one percentage point decrease on in interest and service components	24	'	'
Change in component of other comprehensive income related to the retirement plan and the post-retirement benefit plan [Abstract]	'	'	'
Change in overfunded position of pension and postretirement benefits	-2,403	-590	'
Amortization of net actuarial gain (loss)	49	29	'
Amortization of prior service credit	262	262	'
Total	($2,092)	($299)	'

Benefit_Plans_Allocation_of_Pl

Benefit Plans, Allocation of Plan Assets (Details)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Retirement Plan [Member]

Retirement Plan [Member]

Retirement Plan [Member]

Retirement Plan [Member]

Retirement Plan [Member]

Retirement Plan [Member]

Retirement Plan [Member]

Retirement Plan [Member]

Post-Retirement Benefits Plan [Member]

Post-Retirement Benefits Plan [Member]

Post-Retirement Benefits Plan [Member]

Post-Retirement Benefits Plan [Member]

Post-Retirement Benefits Plan [Member]

Post-Retirement Benefits Plan [Member]

Post-Retirement Benefits Plan [Member]

Post-Retirement Benefits Plan [Member]

Pension and Postretirement Plans [Member]

Pension and Postretirement Plans [Member]

Pension and Postretirement Plans [Member]

Equity securities [Member]

Equity securities [Member]

Debt securities [Member]

Debt securities [Member]

Other [Member]

Other [Member]

Equity securities [Member]

Equity securities [Member]

Debt securities [Member]

Debt securities [Member]

Other [Member]

Other [Member]

Equity securities [Member]

Debt securities [Member]

Other [Member]

Major categories of pension and postretirement benefit plan assets: [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total asset allocation (in hundredths)

100.00%

100.00%

69.00%

65.00%

26.00%

29.00%

5.00%

6.00%

100.00%

100.00%

68.00%

64.00%

27.00%

28.00%

5.00%

8.00%

'

'

'

Assets target allocations [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Prescribed target allocations range, minimum (in hundredths)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

25.00%

0.00%

Prescribed target allocation range, maximum (in hundredths)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

70.00%

40.00%

10.00%

Benefit_Plans_Fair_Value_of_Pl

Benefit Plans, Fair Value of Plan Assets (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Retirement Plan [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	$39,419	$34,584	$30,278
Retirement Plan [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	39,419	34,584	'
Retirement Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	29,811	25,384	'
Retirement Plan [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	9,608	9,200	'
Retirement Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	1,916	2,114	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	1,916	2,114	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	27,296	22,599	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	27,296	22,599	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Equity Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	5,091	4,574	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	5,091	4,574	'
Retirement Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Corporate Bonds [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	4,517	4,626	'
Retirement Plan [Member] | Corporate Bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	4,517	4,626	'
Retirement Plan [Member] | Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	599	671	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	599	671	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Retirement Plan [Member] | Fixed Income Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	17,935	15,026	13,662
Post-Retirement Benefits Plan [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	17,935	15,026	'
Post-Retirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	13,085	10,866	'
Post-Retirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	4,850	4,160	'
Post-Retirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	950	1,148	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	950	1,148	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	12,135	9,718	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	12,135	9,718	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Equity Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	1,020	'	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	'	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	1,020	'	'
Post-Retirement Benefits Plan [Member] | U. S. Government Sponsored Enterprises [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	'	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	3,381	4,160	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	3,381	4,160	'
Post-Retirement Benefits Plan [Member] | State and Political Subdivisions [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	0	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Carrying Value [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	449	'	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	0	'	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	449	'	'
Post-Retirement Benefits Plan [Member] | Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Fair value of plan assets by asset category [Abstract]	'	'	'
Fair value of plan assets	$0	'	'

Benefit_Plans_Employee_Service

Benefit Plans, Employee Service Share-based Compensation, Aggregate Disclosures (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	$847,000	$447,000	$274,000
Number of awards in prior years (in shares)	3,200,000	'	'
Weighted average strike price (in dollars per share)	$7.95	'	'
Stock Options [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Option's maximum term	'P10Y	'	'
Award vesting period	'5 years	'	'
Summary of the status of company's stock option, Outstanding options [Roll Forward]	'	'	'
Beginning balance (in shares)	2,892,000	'	'
New options awarded (in shares)	281,500	'	'
Expired options (in shares)	0	'	'
Cancelled options (in shares)	0	'	'
Exercised options (in shares)	-14,700	0	0
Options became exercisable (in shares)	0	'	'
Ending balance (in shares)	3,158,800	2,892,000	'
Summary of the status of company's stock option, Exercisable options [Roll Forward]	'	'	'
Beginning balance (in shares)	2,144,600	'	'
New options awarded (in shares)	0	'	'
Expired options (in shares)	0	'	'
Cancelled options (in shares)	0	'	'
Exercised options (in shares)	-14,700	'	'
Options became exercisable (in shares)	234,600	'	'
Ending balance (in shares)	2,364,500	2,144,600	'
Weighted average remaining contractual life, options outstanding	'5 years 1 month 6 days	'	'
Weighted average option price, Outstanding options [Roll Forward]	'	'	'
Beginning balance (in dollars per share)	$9.58	'	'
New options awarded (in dollars per share)	$7.05	'	'
Expired options (in dollars per share)	$0	'	'
Cancelled options (in dollars per share)	$0	'	'
Exercised option (in dollars per share)	$5.15	'	'
Options became exercisable (in dollars per share)	$0	'	'
Ending balance (in dollars per share)	$9.54	$9.58	'
Weighted average option price, Exercisable options [Roll Forward]	'	'	'
Beginning balance (in dollars per share)	$11.01	'	'
New options awarded (in dollars per share)	$0	'	'
Expired options (in dollars per share)	$0	'	'
Cancelled (in dollars per share)	$0	'	'
Exercised option (in dollars per share)	$5.15	'	'
Options became exercisable (in dollars per share)	$6.25	'	'
Ending balance (in dollars per share)	$10.78	$11.01	'
Weighted average remaining contractual life, exercisable outstanding	'3 years 4 months 24 days	'	'
Intrinsic value of outstanding stock options	1,200,000	'	'
Intrinsic value of vested stock options	397,000	'	'
Restricted Common Shares [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	170,000	170,000	28,000
Summary of the status of company's stock option, Outstanding options [Roll Forward]	'	'	'
New options awarded (in shares)	'	'	99,000
Restricted Shares Units [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	230,000	23,000	'
Award vesting period	'3 years	'	'
Performance Share Units [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	239,000	19,000	'
Award vesting period	'3 years	'	'
Liability Awards [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	469,000	42,000	'
Equity Awards [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	378,000	405,000	'
401(k) Plan [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Employer matching contribution, first match (in hundredths)	100.00%	'	'
Aggregate salary contribution matched by employer, first match (in hundredths)	3.00%	'	'
Employer matching contribution, next matched (in hundredths)	50.00%	'	'
Aggregate salary contribution matched by employer, next match (in hundredths)	3.00%	'	'
Expense related to 401(k) plan	657,000	601,000	461,000
Directors' Plan [Member] | Restricted Common Shares [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	12,000	12,000	2,000
Summary of the status of company's stock option, Outstanding options [Roll Forward]	'	'	'
New options awarded (in shares)	'	'	7,000
Executive Incentive Plan [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Expense for officers and executive incentive plan	2,000,000	1,600,000	1,300,000
2010 Employee Stock Option Plan [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Shares available for grant (in shares)	2,000,000	'	'
2004 Employee Stock Option Plan [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Shares available for grant (in shares)	2,000,000	'	'
2010 Directors Stock Option Plan [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Stock based compensation expense	$0	$0	$13,000
Shares available for grant (in shares)	250,000	'	'
2004 Directors Stock Option Plan [Member]	'	'	'
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]	'	'	'
Shares available for grant (in shares)	200,000	'	'

Benefit_Plans_Valuation_StockB

Benefit Plans, Valuation, Stock-Based Compensation (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	$847	$447	$274
Stock Options [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Award vesting period	'5 years	'	'
Unrecognized stock-based compensation expense related to non-vested stock options	600	'	'
Unrecognized compensation expense, period of recognition	'3 years 10 months 24 days	'	'
Weighted average fair value of stock options granted (in dollars per share)	$1.08	$0.76	$0.98
Weighted Average Price [Abstract]	'	'	'
Shares issued (in shares)	281,500	'	'
Restricted Common Shares [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	170	170	28
Unrecognized stock-based compensation expense	151	333	515
Unrecognized compensation expense, period of recognition	'1 year	'2 years	'3 years
Shares [Abstract]	'	'	'
Balance, December 31, 2012 (in shares)	106,000	'	'
New awards granted (in shares)	0	'	'
Awards became vested (in shares)	0	'	'
Balance, December 31, 2013 (in shares)	106,000	106,000	'
Weighted Average Price [Abstract]	'	'	'
Balance, December 31, 2012 (in dollars per share)	$5.14	'	'
New awards granted (in dollars per share)	$0	'	'
Awards became vested (in dollars per share)	$0	'	'
Balance, December 31, 2013 (in dollars per share)	$5.14	$5.14	'
Shares issued (in shares)	'	'	99,000
Shares vested after term (in hundredths)	'	'	100.00%
Awards granted, fair value	'	'	$5.14
Restricted Shares Units [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	230	23	'
Award vesting period	'3 years	'	'
Unrecognized stock-based compensation expense	710	'	'
Unrecognized compensation expense, period of recognition	'30 months	'	'
Shares [Abstract]	'	'	'
Balance, December 31, 2012 (in shares)	82,500	'	'
New awards granted (in shares)	51,250	'	'
Awards became vested (in shares)	0	'	'
Balance, December 31, 2013 (in shares)	133,750	82,500	'
Weighted Average Price [Abstract]	'	'	'
Balance, December 31, 2012 (in dollars per share)	$5.17	'	'
New awards granted (in dollars per share)	$7.05	'	'
Awards became vested (in dollars per share)	$0	'	'
Balance, December 31, 2013 (in dollars per share)	$5.89	$5.17	'
Shares vested after term (in hundredths)	100.00%	'	'
Liability related to awards	253	23	'
Performance Share Units [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	239	19	'
Award vesting period	'3 years	'	'
Unrecognized stock-based compensation expense	910	'	'
Unrecognized compensation expense, period of recognition	'30 months	'	'
Shares [Abstract]	'	'	'
Balance, December 31, 2012 (in shares)	65,000	'	'
New awards granted (in shares)	81,500	'	'
Awards became vested (in shares)	0	'	'
Balance, December 31, 2013 (in shares)	146,500	65,000	'
Weighted Average Price [Abstract]	'	'	'
Balance, December 31, 2012 (in dollars per share)	$5.17	'	'
New awards granted (in dollars per share)	$7.05	'	'
Awards became vested (in dollars per share)	$0	'	'
Balance, December 31, 2013 (in dollars per share)	$6.22	$5.17	'
Shares vested after term (in hundredths)	100.00%	'	'
Liability related to awards	258	19	'
Liability Awards [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	469	42	'
Equity Awards [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	378	405	'
Employees' Plan [Member]	'	'	'
Assumption used to determine fair value of options [Abstract]	'	'	'
Expected dividend yield (in hundredths)	3.72%	5.08%	5.11%
Risk-free interest rate (in hundredths)	1.45%	0.80%	1.90%
Expected volatility rate (in hundredths)	25.83%	30.18%	26.64%
Expected lives	'5 years	'5 years	'7 years 6 months
Directors' Plan [Member]	'	'	'
Assumption used to determine fair value of options [Abstract]	'	'	'
Expected dividend yield (in hundredths)	'	'	5.11%
Risk-free interest rate (in hundredths)	'	'	1.59%
Expected volatility rate (in hundredths)	'	'	28.50%
Expected lives	'	'	'6 years
Directors' Plan [Member] | Restricted Common Shares [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	12	12	2
Weighted Average Price [Abstract]	'	'	'
Shares issued (in shares)	'	'	7,000
2010 Directors Stock Option Plan [Member]	'	'	'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized [Abstract]	'	'	'
Stock based compensation expense	$0	$0	$13

Benefit_Plans_Stock_Based_Comp

Benefit Plans, Stock Based Compensation Expense (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	$847	$447	$274
Income tax benefit related to stock-based compensation	296	156	100
Restricted Common Shares [Member]	'	'	'
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	170	170	28
Restricted Shares Units [Member]	'	'	'
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	230	23	'
Performance Share Units [Member]	'	'	'
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	239	19	'
Liability Awards [Member]	'	'	'
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	469	42	'
Equity Awards [Member]	'	'	'
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	378	405	'
Directors' Plan [Member] | Restricted Common Shares [Member]	'	'	'
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	12	12	2
2010 Directors Stock Option Plan [Member]	'	'	'
Stock Based Compensation Expense [Abstract]	'	'	'
Stock based compensation expense	$0	$0	$13

Commitments_and_Contingent_Lia2

Commitments and Contingent Liabilities (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating leases with minimum rental commitments [Abstract]	'	'	'
2014	$6,860,000	'	'
2015	6,493,000	'	'
2016	6,295,000	'	'
2017	5,979,000	'	'
2018	5,719,000	'	'
2019 and after	42,429,000	'	'
Total	73,775,000	'	'
Outsourced service expense	5,125,000	5,122,000	5,100,000
Contractual Obligation [Abstract]	'	'	'
Outsource Service expense, minimum payment	5,000,000	'	'
Outsource Service expense, maximum payment	$6,000,000	'	'

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the component parts of earnings per share [Abstract]	'	'	'
Net income	$39,812	$37,534	$33,087
Less: Net income allocated to participating securities	45	43	5
Net income allocated to common shareholders	39,767	37,491	33,082
Basic EPS [Abstract]	'	'	'
Distributed earnings allocated to common stock	24,745	24,607	22,389
Undistributed earnings allocated to common stock	15,022	12,884	10,693
Net income allocated to common shareholders	39,767	37,491	33,082
Weighted average common shares outstanding including participating securities (in shares)	94,266,000	93,739,000	85,086,000
Less: Participating securities (in shares)	106,000	106,000	14,000
Weighted average common shares (in shares)	94,160,000	93,633,000	85,072,000
Basic EPS (in dollars per share)	$0.42	$0.40	$0.39
Diluted EPS [Abstract]	'	'	'
Net income allocated to common shareholders	$39,767	$37,491	$33,082
Weighted average common shares for basic EPS (in shares)	94,160,000	93,633,000	85,072,000
Effect of Dilutive Securities [Abstract]	'	'	'
Stock Options (in shares)	46,000	4,000	0
Weighted average common shares including potential dilutive shares (in shares)	94,206,000	93,637,000	85,072,000
Diluted EPS (in dollars per share)	$0.42	$0.40	$0.39
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)	2,500,000	2,900,000	2,800,000

OffBalance_Sheet_Financial_Ins1

Off-Balance Sheet Financial Instruments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Commitments to Extend Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance sheet risks, amount	$430.30	$388.20
Variable rate product commitments (in hundredths)	79.00%	84.00%
Standby Letters of Credit [Member]	'	'
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]	'	'
Off-balance sheet risks, amount	$6.50	$5.60
Off balance sheet instrument term	'12 months	'

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments, Part 1 (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Securities available-for sale [Abstract]	'	'
Total securities available for sale	$863,754	$912,092
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'
Securities available-for sale [Abstract]	'	'
Total securities available for sale	10	10
Significant Other Observable Inputs (Level 2) [Member]	'	'
Securities available-for sale [Abstract]	'	'
Total securities available for sale	863,744	912,082
Significant Unobservable Inputs (Level 3) [Member]	'	'
Securities available-for sale [Abstract]	'	'
Total securities available for sale	0	0
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
Mortgage-backed securities and collateralized mortgage obligations - residential	0	0
Corporate bonds	0	0
Small Business Administration-guaranteed participation securities	0	0
Mortgage-backed securities and collateralized mortgage obligations - commercial	0	'
Other securities	10	10
Total securities available for sale	10	10
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'
Securities available-for sale [Abstract]	'	'
U.S. government-sponsored enterprises	198,829	263,108
State and political subdivisions	7,758	26,457
Mortgage-backed securities and collateralized mortgage obligations - residential	532,449	518,776
Corporate bonds	10,471	26,529
Small Business Administration-guaranteed participation securities	103,029	76,562
Mortgage-backed securities and collateralized mortgage obligations - commercial	10,558	'
Other securities	650	650
Total securities available for sale	863,744	912,082
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
Mortgage-backed securities and collateralized mortgage obligations - residential	0	0
Corporate bonds	0	0
Small Business Administration-guaranteed participation securities	0	0
Mortgage-backed securities and collateralized mortgage obligations - commercial	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	198,829	263,108
State and political subdivisions	7,758	26,457
Mortgage-backed securities and collateralized mortgage obligations - residential	532,449	518,776
Corporate bonds	10,471	26,529
Small Business Administration-guaranteed participation securities	103,029	76,562
Mortgage-backed securities and collateralized mortgage obligations - commercial	10,558	'
Other securities	660	660
Total securities available for sale	$863,754	$912,092

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments, Part 2 (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Real Estate Owned (ORE) [Abstract]	'	'	'
Other real estate owned, commercial real estate	$5,000,000	$4,800,000	'
Other real estate owned, residential real estate properties	3,700,000	3,900,000	'
Valuation charge on other real estate owned	2,200,000	1,100,000	'
Impaired loans [Abstract]	'	'	'
Impaired loans	29,340,000	26,073,000	13,711,000
Collateral dependent impaired loans	5,100,000	10,800,000	'
Gross charge offs, commercial impaired loans	761,000	2,500,000	'
Gross charge offs, residential impaired loans	534,000	1,700,000	'
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	'	'	'
Other Real Estate Owned (ORE) [Abstract]	'	'	'
Other real estate owned	0	0	'
Impaired loans [Abstract]	'	'	'
Commercial real estate	0	0	'
Real estate mortgage 1 to 4 family: first mortgage	0	0	'
Home Equity Loans	0	0	'
Home Equity Lines of Credit	0	0	'
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]	'	'	'
Other Real Estate Owned (ORE) [Abstract]	'	'	'
Other real estate owned	0	0	'
Impaired loans [Abstract]	'	'	'
Commercial real estate	0	0	'
Real estate mortgage 1 to 4 family: first mortgage	0	0	'
Home Equity Loans	0	0	'
Home Equity Lines of Credit	0	0	'
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]	'	'	'
Other Real Estate Owned (ORE) [Abstract]	'	'	'
Other real estate owned	8,729,000	8,705,000	'
Impaired loans [Abstract]	'	'	'
Commercial real estate	1,802,000	4,690,000	'
Real estate mortgage 1 to 4 family: first mortgage	2,425,000	5,421,000	'
Home Equity Loans	48,000	67,000	'
Home Equity Lines of Credit	810,000	581,000	'
Nonrecurring [Member] | Carrying Value [Member]	'	'	'
Other Real Estate Owned (ORE) [Abstract]	'	'	'
Other real estate owned	8,729,000	8,705,000	'
Impaired loans [Abstract]	'	'	'
Commercial real estate	1,802,000	4,690,000	'
Real estate mortgage 1 to 4 family: first mortgage	2,425,000	5,421,000	'
Home Equity Loans	48,000	67,000	'
Home Equity Lines of Credit	$810,000	$581,000	'

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments, Part 3 (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Financial assets [Abstract]	'	'	'	'
Cash and cash equivalents	$583,044	$544,016	$532,943	$444,250
Securities available for sale	863,754	912,092	'	'
Held to maturity securities	90,305	151,126	'	'
Net loans	2,910,940	2,771,705	'	'
Accrued interest receivable	11,198	11,752	'	'
Financial liabilities [Abstract]	'	'	'	'
Demand deposits	318,456	300,544	'	'
Interest bearing deposits	3,609,592	3,505,833	'	'
Short-term borrowings	204,162	159,846	'	'
Accrued interest payable	468	449	'	'
Fair Value Measurements Using Level 1 [Member]	'	'	'	'
Financial assets [Abstract]	'	'	'	'
Cash and cash equivalents	583,044	544,016	'	'
Securities available for sale	10	10	'	'
Held to maturity securities	0	0	'	'
Net loans	0	0	'	'
Accrued interest receivable	0	0	'	'
Financial liabilities [Abstract]	'	'	'	'
Demand deposits	318,456	300,544	'	'
Interest bearing deposits	2,477,567	2,426,170	'	'
Short-term borrowings	0	0	'	'
Accrued interest payable	101	103	'	'
Fair Value Measurements Using Level 2 [Member]	'	'	'	'
Financial assets [Abstract]	'	'	'	'
Cash and cash equivalents	0	0	'	'
Securities available for sale	863,744	912,082	'	'
Held to maturity securities	90,305	151,126	'	'
Net loans	0	0	'	'
Accrued interest receivable	3,452	4,114	'	'
Financial liabilities [Abstract]	'	'	'	'
Demand deposits	0	0	'	'
Interest bearing deposits	1,132,025	1,079,663	'	'
Short-term borrowings	204,162	159,846	'	'
Accrued interest payable	367	346	'	'
Fair Value Measurements Using 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	2,910,940	2,771,705	'	'
Accrued interest receivable	7,746	7,638	'	'
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	583,044	544,016	'	'
Securities available for sale	863,754	912,092	'	'
Held to maturity securities	86,215	143,426	'	'
Federal Reserve Bank and Federal Home Loan Bank stock	10,500	9,632	'	'
Net loans	2,878,540	2,636,806	'	'
Accrued interest receivable	11,198	11,752	'	'
Financial liabilities [Abstract]	'	'	'	'
Demand deposits	318,456	300,544	'	'
Interest bearing deposits	3,608,615	3,503,649	'	'
Short-term borrowings	204,162	159,846	'	'
Accrued interest payable	$468	$449	'	'

Regulatory_Capital_Requirement2

Regulatory Capital Requirements (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
	Set
Tier One Risk Based Capital [Abstract]	'		'
Tier One Risk Based Capital	$375,063,000		$356,687,000
Total risk-based capital	403,317,000		383,678,000
Risk Based Ratios [Abstract]	'		'
Tier 1 risk-based capital, ratio (in hundredths)	16.74%		16.68%
Total risk-based capital, ratio (in hundredths)	18.00%		17.94%
Leverage Capital [Abstract]	'		'
Leverage Capital	375,063,000		356,687,000
Tier One Risk Based Capital	375,063,000		356,687,000
Total risk-based capital	403,317,000		383,678,000
Leverage Ratios [Abstract]	'		'
Leverage Capital, ratio (in hundredths)	8.27%		8.21%
Tier 1 risk-based capital, ratio (in hundredths)	16.74%		16.68%
Total risk-based capital, ratio (in hundredths)	18.00%		17.94%
Number of overlapping sets of regulatory capital requirements	2		'
Minimum tangible capital as percentage of tangible assets required (in hundredths)	1.50%		'
Leverage ratio for the most highly rated institutions (in hundredths)	3.00%		'
Top-tier savings and loans bank threshold total consolidated assets	500,000,000		'
Tier 1 minimum capital requirement, future common equity rule (in hundredths)	4.50%		'
Minimum tier 1 capital to risk-based assets requirement affected on January 1, 2015 (in hundredths)	6.00%		'
Trustco Bank [Member]	'		'
Tier One Risk Based Capital [Abstract]	'		'
Tier 1 (core) capital	365,954,000		349,580,000
Tier One Risk Based Capital	365,954,000		349,580,000
Total risk-based capital	394,200,000		376,565,000
Risk Based Ratios [Abstract]	'		'
Tier 1 (core) capital, ratio (in hundredths)	8.07%		8.05%
Tier 1 (core) capital, Well Capitalized (in hundredths)	5.00%	[1]	5.00%	[1]
Tier 1 (core) capital, Adequately Capitalized (in hundredths)	4.00%	[1]	4.00%	[1]
Tier 1 risk-based capital, ratio (in hundredths)	16.34%		16.35%
Tier 1 risk-based capital, Well Capitalized (in hundredths)	6.00%	[1]	6.00%	[1]
Tier 1 risk-based capital, Adequately Capitalized (in hundredths)	4.00%	[1]	4.00%	[1]
Total risk-based capital, ratio (in hundredths)	17.60%		17.62%
Total risk-based capital, Well Capitalized (in hundredths)	10.00%	[1]	10.00%	[1]
Total risk-based capital, Adequately Capitalized (in hundredths)	8.00%	[1]	8.00%	[1]
Leverage Capital [Abstract]	'		'
Tier One Risk Based Capital	365,954,000		349,580,000
Total risk-based capital	$394,200,000		$376,565,000
Leverage Ratios [Abstract]	'		'
Tier 1 risk-based capital, ratio (in hundredths)	16.34%		16.35%
Total risk-based capital, ratio (in hundredths)	17.60%		17.62%
[1]	Regulatory minimum requirements to be considered to be Well Capitalized and Adequately Capitalized

Other_Comprehensive_Income_Det

Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'
Accumulated other comprehensive income (loss), net of tax, beginning of period	$1,558	($2,493)	($4,119)
Other comprehensive income (loss)- before reclassifications	-14,511	5,322	2,588
Amount reclassified from accumulated other comprehensive income	-850	-1,271	-962
Other comprehensive income (loss), net of tax	-15,361	4,051	1,626
Accumulated other comprehensive income (loss), net of tax, end of period	-13,803	1,558	-2,493
Unrealized Gain (Losses) on Securities Available For Sale [Member]	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'
Accumulated other comprehensive income (loss), net of tax, beginning of period	3,755	-1,018	-5,607
Other comprehensive income (loss)- before reclassifications	-20,860	6,070	5,446
Amount reclassified from accumulated other comprehensive income	-973	-1,297	-857
Other comprehensive income (loss), net of tax	-21,833	4,773	4,589
Accumulated other comprehensive income (loss), net of tax, end of period	-18,078	3,755	-1,018
Net Change in Net Actuarial Loss and Prior Service Credit on Pension and Postretirement Benefit Plans, Net of Tax [Member]	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'
Accumulated other comprehensive income (loss), net of tax, beginning of period	309	283	388
Other comprehensive income (loss)- before reclassifications	0	0	0
Amount reclassified from accumulated other comprehensive income	123	26	-105
Other comprehensive income (loss), net of tax	123	26	-105
Accumulated other comprehensive income (loss), net of tax, end of period	432	309	283
Change in overfunded position [Member]	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'
Accumulated other comprehensive income (loss), net of tax, beginning of period	-2,506	-1,758	1,100
Other comprehensive income (loss)- before reclassifications	6,349	-748	-2,858
Amount reclassified from accumulated other comprehensive income	0	0	0
Other comprehensive income (loss), net of tax	6,349	-748	-2,858
Accumulated other comprehensive income (loss), net of tax, end of period	$3,843	($2,506)	($1,758)

Other_Comprehensive_Income_Rec

Other Comprehensive Income, Reclassifications out of accumulated other comprehensive income (loss) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'
Net gain on securities transactions	$1,622	$2,161	$1,428
Salaries and employee benefits	32,424	31,276	28,751
Income taxes	23,717	22,441	19,298
Net income	39,812	37,534	33,087
Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'
Net income	850	1,271	962
Unrealized Gain (Losses) on Securities Available For Sale [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'
Net gain on securities transactions	1,622	2,161	1,428
Income taxes	-649	-864	-571
Net income	973	1,297	857
Net Change in Net Actuarial Loss and Prior Service Credit on Pension and Postretirement Benefit Plans, Net of Tax [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'
Income taxes	82	18	-72
Net income	-123	-26	105
Amortization of Net Actuarial Loss [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'
Salaries and employee benefits	-467	-306	-85
Amortization Of Prior Service Cost [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]	'	'	'
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]	'	'	'
Salaries and employee benefits	$262	$262	$262

Common_stock_offering_Details

Common stock offering (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012
Common stock offering [Abstract]	'	'	'
Common stock public offering completion date	6-Jul-11	'	'
Number of shares of common stock in public offering (in shares)	15,640,000	'	'
Shares of common stock, par value (in dollars per share)	$1	$1	$1
Additional shares due to underwriters' exercise of over-allotment option ( in shares)	2,040,000	'	'
Common stock sale price (in dollars per share)	$4.60	'	'
Net proceeds from common stock offering	$67.60	'	'

Building_Held_for_Sale_Details

Building Held for Sale (Details) (USD $)	12 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2014
		Subsequent Event [Member]
Building Held for Sale [Abstract]	'	'
Agreement to sell operations center	$5	'
Carrying value of building to be used as operations center	3.2	'
Subsequent Event [Line Items]	'	'
Recognized gain from the sale of the building	'	$1.60

Parent_Company_Only_Statements

Parent Company Only, Statements of Income (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Income [Abstract]	'	'	'
Net gain on securities transactions	$1,622	$2,161	$1,428
Expenses [Abstract]	'	'	'
Professional services	5,649	6,040	5,729
Total noninterest expense	85,005	83,977	82,142
Income taxes	23,717	22,441	19,298
Net income	39,812	37,534	33,087
TrustCo Bank Corp NY [Member]	'	'	'
Statement of Income [Abstract]	'	'	'
Dividends and interest from subsidiaries	24,491	24,475	19,635
Net gain on securities transactions	0	0	45
Income from other investments	0	0	1
Total income	24,491	24,475	19,681
Expenses [Abstract]	'	'	'
Operating supplies	81	105	86
Professional services	491	296	362
Miscellaneous expense	1,042	737	555
Total noninterest expense	1,614	1,138	1,003
Income before income taxes and subsidiaries' undistributed earnings	22,877	23,337	18,678
Income taxes	-548	-364	-174
Income before subsidiaries' undistributed earnings	23,425	23,701	18,852
Equity in undistributed earnings of subsidiaries	16,387	13,833	14,235
Net income	$39,812	$37,534	$33,087

Parent_Company_Only_Statements1

Parent Company Only, Statements of Condition (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Assets [Abstract]	'	'	'	'
Securities available for sale	$863,754	$912,092	'	'
Other assets	82,430	64,402	'	'
Total assets	4,521,452	4,346,613	'	'
Liabilities and shareholders' equity [Abstract]	'	'	'	'
Accrued expenses and other liabilities	28,406	23,776	'	'
Total liabilities	4,159,639	3,987,815	'	'
Shareholders' equity	361,813	358,798	338,516	255,440
Total liabilities and shareholders' equity	4,521,452	4,346,613	'	'
TrustCo Bank Corp NY [Member]	'	'	'	'
Assets [Abstract]	'	'	'	'
Cash in subsidiary bank	15,263	12,950	'	'
Investments in subsidiaries	352,717	351,704	'	'
Securities available for sale	10	10	'	'
Other assets	227	178	'	'
Total assets	368,217	364,842	'	'
Liabilities and shareholders' equity [Abstract]	'	'	'	'
Accrued expenses and other liabilities	6,404	6,044	'	'
Total liabilities	6,404	6,044	'	'
Shareholders' equity	361,813	358,798	'	'
Total liabilities and shareholders' equity	$368,217	$364,842	'	'

Parent_Company_Only_Statements2

Parent Company Only, Statements of Cash Flows (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:	'	'	'
Net income	$39,812	$37,534	$33,087
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Stock based compensation expense	378	405	287
Net gain on securities transactions	-1,622	-2,161	-1,428
Total adjustments	23,147	21,095	28,231
Net cash provided by operating activities	62,959	58,629	61,318
Cash flows from investing activities:	'	'	'
Proceeds from sales and calls of securities available for sale	417,204	1,204,250	1,171,945
Purchases of securities available for sale	-416,617	-1,199,986	-1,207,157
Net cash used in investing activities	-169,345	-106,385	-226,604
Cash flows from financing activities:	'	'	'
Proceeds from exercise of stock options and related tax benefits	36	0	0
Dividends paid	-24,724	-24,587	-21,333
Net proceeds from common stock offering	0	0	67,578
Proceeds from sales of treasury stock	2,908	2,913	2,900
Net cash provided by (used in) financing activities	145,414	58,829	253,979
Net increase in cash and cash equivalents	39,028	11,073	88,693
Cash and cash equivalents at beginning of period	544,016	532,943	444,250
Cash and cash equivalents at end of period	583,044	544,016	532,943
TrustCo Bank Corp NY [Member]	'	'	'
Cash flows from operating activities:	'	'	'
Net income	39,812	37,534	33,087
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Equity in undistributed earnings of subsidiaries	-16,387	-13,833	-14,235
Stock based compensation expense	378	405	287
Net gain on securities transactions	0	0	-45
Net change in other assets and accrued expenses	277	-158	-232
Total adjustments	-15,732	-13,586	-14,225
Net cash provided by operating activities	24,080	23,948	18,862
Cash flows from investing activities:	'	'	'
Proceeds from sales and calls of securities available for sale	0	0	372
Investment in bank subsidiary	0	0	-67,000
Purchases of securities available for sale	0	0	-68
Net cash used in investing activities	0	0	-66,696
Cash flows from financing activities:	'	'	'
Proceeds from exercise of stock options and related tax benefits	36	0	0
Dividends paid	-24,711	-24,574	-21,320
Net proceeds from common stock offering	0	0	67,578
Proceeds from sales of treasury stock	2,908	2,913	2,900
Net cash provided by (used in) financing activities	-21,767	-21,661	49,158
Net increase in cash and cash equivalents	2,313	2,287	1,324
Cash and cash equivalents at beginning of period	12,950	10,663	9,339
Cash and cash equivalents at end of period	$15,263	$12,950	$10,663