|
Securities (Summary of Amortized Costs and Estimated Fair Values of Available-For-Sale Securities) (Details) (USD $)
In Thousands, unless otherwise specified
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale, Amortized Cost |
$ 763,553 |
$ 820,728 |
| Available-for-sale, Unrealized Gains |
7,434 |
7,525 |
| Available-for-sale, Unrealized Losses |
(7,924) |
(19,776) |
| AFS securities |
763,063 |
808,477 |
| Held-to-maturity Securities |
20,179 |
0 |
| Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |
265 |
|
| Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |
(19) |
|
| Held-to-maturity Securities, Fair Value |
20,425 |
|
| US Government Corporations and Agencies Securities [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale, Amortized Cost |
4,962 |
|
| Available-for-sale, Unrealized Gains |
65 |
|
| Available-for-sale, Unrealized Losses |
0 |
|
| AFS securities |
5,027 |
|
| Held-to-maturity Securities |
20,179 |
|
| Held-to-maturity Securities, Accumulated Unrecognized Holding Gain |
265 |
|
| Held-to-maturity Securities, Accumulated Unrecognized Holding Loss |
(19) |
|
| Held-to-maturity Securities, Fair Value |
20,425 |
|
| Obligations of states and political subdivisions [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale, Amortized Cost |
26,080 |
30,143 |
| Available-for-sale, Unrealized Gains |
697 |
1,075 |
| Available-for-sale, Unrealized Losses |
0 |
(11) |
| AFS securities |
26,777 |
31,207 |
| Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale, Amortized Cost |
377,657 |
397,409 |
| Available-for-sale, Unrealized Gains |
5,656 |
5,528 |
| Available-for-sale, Unrealized Losses |
(2,005) |
(7,034) |
| AFS securities |
381,308 |
395,903 |
| Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale, Amortized Cost |
348,855 |
385,847 |
| Available-for-sale, Unrealized Gains |
953 |
912 |
| Available-for-sale, Unrealized Losses |
(5,911) |
(12,324) |
| AFS securities |
343,897 |
374,435 |
| Private issue collateralized mortgage obligations [Member] |
|
|
| Schedule of Investments [Line Items] |
|
|
| Available-for-sale, Amortized Cost |
5,999 |
7,329 |
| Available-for-sale, Unrealized Gains |
63 |
10 |
| Available-for-sale, Unrealized Losses |
(8) |
(407) |
| AFS securities |
$ 6,054 |
$ 6,932 |