|
Investment Securities (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
|
Sep. 30, 2013
securities
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Dec. 31, 2012
|
|
| Available-for-sale: [Abstract] | |||||
| Amortized Cost | $ 511,648 | $ 511,648 | $ 500,862 | ||
| Gross Unrealized Gains | 4,193 | 4,193 | 11,871 | ||
| Gross Unrealized (Losses) | (15,537) | (15,537) | (4,424) | ||
| Fair Value | 500,304 | 500,304 | 508,309 | ||
| Number Of Trust Preferred Securities Sold | 2 | ||||
| Gain (Loss) on Sale of Securities, Net | 1,456 | 110 | 2,291 | 933 | |
| Realized Investment Gains (Losses) [Abstract] | |||||
| Gross gains | 2,452 | 933 | |||
| Gross losses | (161) | 0 | |||
|
U.S. Treasury securities and obligations of U.S. government corporations & agencies
|
|||||
| Available-for-sale: [Abstract] | |||||
| Amortized Cost | 198,037 | 198,037 | 180,851 | ||
| Gross Unrealized Gains | 163 | 163 | 1,321 | ||
| Gross Unrealized (Losses) | (6,708) | (6,708) | (3) | ||
| Fair Value | 191,492 | 191,492 | 182,169 | ||
|
Obligations of states and political subdivisions
|
|||||
| Available-for-sale: [Abstract] | |||||
| Amortized Cost | 65,175 | 65,175 | 53,064 | ||
| Gross Unrealized Gains | 1,154 | 1,154 | 3,163 | ||
| Gross Unrealized (Losses) | (1,652) | (1,652) | (20) | ||
| Fair Value | 64,677 | 64,677 | 56,207 | ||
|
Mortgage-backed securities: GSE residential
|
|||||
| Available-for-sale: [Abstract] | |||||
| Amortized Cost | 238,749 | 238,749 | 252,310 | ||
| Gross Unrealized Gains | 2,836 | 2,836 | 7,162 | ||
| Gross Unrealized (Losses) | (3,689) | (3,689) | (12) | ||
| Fair Value | 237,896 | 237,896 | 259,460 | ||
|
Trust preferred securities
|
|||||
| Available-for-sale: [Abstract] | |||||
| Amortized Cost | 3,652 | 3,652 | 4,974 | ||
| Gross Unrealized Gains | 0 | 0 | 0 | ||
| Gross Unrealized (Losses) | (3,478) | (3,478) | (4,389) | ||
| Fair Value | 174 | 174 | 585 | ||
| Number of trust preferred securities | 1 | ||||
| Gain (Loss) on Sale of Securities, Net | 1,400 | ||||
|
Trust preferred securities | Maximum [Member]
|
|||||
| Available-for-sale: [Abstract] | |||||
| Maturities of Debt Securities | twenty-four years | ||||
|
Other securities
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|||||
| Available-for-sale: [Abstract] | |||||
| Amortized Cost | 6,035 | 6,035 | 9,663 | ||
| Gross Unrealized Gains | 40 | 40 | 225 | ||
| Gross Unrealized (Losses) | (10) | (10) | 0 | ||
| Fair Value | $ 6,065 | $ 6,065 | $ 9,888 | ||