XML 70 R38.htm IDEA: XBRL DOCUMENT
v2.4.0.8

LOANS, Loan Summary (Details) (USD $) | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Jun. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2012
Loans receivable, net [Abstract] |  |  |  |  |  |
Typical contract term of consumer mortgages, minimum | 10 years |  |  |  |  |
Typical contract term of consumer mortgages, maximum | 30 years |  |  |  |  |
Typical contract term of home equity loans, maximum | 30 years |  |  |  |  |
Gross loans, including deferred origination costs | $ 4,217,244,000 |  | $ 4,109,083,000 |  |  |
Allowance for loan losses | (45,273,000) | (44,615,000) | (44,319,000) | (44,083,000) | (43,473,000) | (42,888,000)
Net loans | 4,171,971,000 |  | 4,064,764,000 |  |  |
Credit impaired acquired loans, outstanding balance | 7,000,000 |  | 13,100,000 |  |  |
Accretable discount related to credit impaired acquired loans [Roll forward] |  |  |  |  |  |
Beginning Balance | 997,000 |  |  |  |  |
Accretion recognized, year-to-date | (567,000) |  |  |  |  |
Net reclassification to accretable from nonaccretable | 355,000 |  |  |  |  |
Ending Balance | 785,000 |  |  |  |  |
Consumer Mortgage [Member] |  |  |  |  |  |
Loans receivable, net [Abstract] |  |  |  |  |  |
Gross loans, including deferred origination costs | 1,598,298,000 |  | 1,582,058,000 |  |  |
Allowance for loan losses | (9,454,000) | (9,375,000) | (8,994,000) | (7,601,000) | (7,373,000) | (7,070,000)
Business Lending [Member] |  |  |  |  |  |
Loans receivable, net [Abstract] |  |  |  |  |  |
Gross loans, including deferred origination costs | 1,251,178,000 |  | 1,260,364,000 |  |  |
Allowance for loan losses | (16,591,000) | (16,553,000) | (17,507,000) | (18,271,000) | (18,283,000) | (18,013,000)
Consumer Indirect [Member] |  |  |  |  |  |
Loans receivable, net [Abstract] |  |  |  |  |  |
Gross loans, including deferred origination costs | 841,975,000 |  | 740,002,000 |  |  |
Allowance for loan losses | (11,899,000) | (11,354,000) | (10,248,000) | (10,068,000) | (9,369,000) | (9,606,000)
Consumer Direct [Member] |  |  |  |  |  |
Loans receivable, net [Abstract] |  |  |  |  |  |
Gross loans, including deferred origination costs | 186,672,000 |  | 180,139,000 |  |  |
Allowance for loan losses | (3,330,000) | (3,298,000) | (3,181,000) | (3,165,000) | (3,054,000) | (3,303,000)
Home Equity [Member] |  |  |  |  |  |
Loans receivable, net [Abstract] |  |  |  |  |  |
Gross loans, including deferred origination costs | 339,121,000 |  | 346,520,000 |  |  |
Allowance for loan losses | $ (1,901,000) | $ (1,860,000) | $ (1,830,000) | $ (1,714,000) | $ (1,674,000) | $ (1,451,000)

X
- Definition Undiscounted amounts deemed principal and interest owed to the acquirer at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit impairment quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
Name: | cbu_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesImpairmentOutstandingBalance
Namespace Prefix: | cbu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The maximum of the typical original contract term of consumer mortgages, which consists primarily of fixed rate residential instruments. + References No definition available. + Details
Name: | cbu_ContractTermOfConsumerMortgagesMaximumInYears
Namespace Prefix: | cbu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum of the typical original contract term of consumer mortgages, which consists primarily of fixed rate residential instruments. + References No definition available. + Details
Name: | cbu_ContractTermOfConsumerMortgagesMinimumInYears
Namespace Prefix: | cbu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum of the typical original contract term of home equity loans. + References No definition available. + Details
Name: | cbu_ContractTermOfHomeEquityLoansMaximumInYears
Namespace Prefix: | cbu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of decrease from accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldMovementScheduleRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase of reclassification from nonaccretable difference to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetReportedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_NotesReceivableNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration