Mergers and Acquisitions (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Aug. 01, 2012
VIST Financial Corp. ("VIST Financial")
Consideration Paid In Thousands        
Tompkins Common Stock Issued       $ 82,198
Cash payment for fractional shares       13
Cash payments for VIST Financial employee stock options       1,236
Fair value of VIST Financial employee stock options, converted to Tompkins' common stock options       1,107
Cash payment for VIST Financial TARP, warrants and accrued and unpaid dividends       26,454
Business acquisition cost purchase price       111,008
Recognized Amounts Of Identifiable Assets Acquired And Liabilities Assumed at estimated fair value        
Cash and cash equivalents       32,985
Available-for-sale securities       376,298
FHLB stock       4,751
Loans and leases       889,336
Premises and equipment       7,343
Identifiable intangible assets       16,017
Accrued interest receivable and other assets       68,045
Deposits       (1,185,235)
Borrowings       (138,263)
Other Liabilities       (7,698)
Total identifiable assets       63,579
Goodwill $ 92,140 $ 92,305 $ 43,898 $ 47,429