|
Borrowings (Schedule of Other Borrowed Funds) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|---|
| Debt Instrument [Line Items] | |||
| FHLBB advances less than 90 days | $ 11,039 | $ 11,112 | |
| Total short-term borrowings | 445,921 | 398,932 | 192,681 |
| Total long-term borrowings | 31,018 | 31,126 | |
| Total other borrowed funds | 476,939 | 430,058 | |
| Short-term Debt [Member] | |||
| Debt Instrument [Line Items] | |||
| Securities Sold under Agreements to Repurchase | 157,758 | 130,047 | |
| FHLBB advances less than 90 days | 245,000 | 230,000 | |
| FHLBB and correspondent bank overnight borrowings | 43,100 | 38,800 | |
| Capital lease obligation | 63 | 60 | |
| Notes payable | 0 | 25 | |
| Long-term Debt [Member] | |||
| Debt Instrument [Line Items] | |||
| Securities Sold under Agreements to Repurchase | 30,097 | 30,142 | |
| Capital lease obligation | $ 921 | $ 984 |