Note 4 - Investment Securities (Tables)
|
12 Months Ended |
Dec. 31, 2016 |
Notes Tables |
|
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Securities Available-for-Sale | | | | | | | | | | | | | | | | | | | $ | 489,839 | | | $ | 35 | | | $ | 857 | | | $ | 489,017 | | U.S. government sponsored entities | | | 400,000 | | | | - | | | | 9,669 | | | | 390,331 | | Mortgage-backed securities | | | 339,241 | | | | 309 | | | | 3,290 | | | | 336,260 | | Collateralized mortgage obligations | | | 48 | | | | - | | | | 20 | | | | 28 | | Corporate debt securities | | | 74,965 | | | | 247 | | | | 862 | | | | 74,350 | | | | | 6,500 | | | | - | | | | 270 | | | | 6,230 | | Preferred stock of government sponsored entities | | | 2,811 | | | | 4,497 | | | | - | | | | 7,308 | | | | | 3,608 | | | | 7,213 | | | | - | | | | 10,821 | | Total securities available-for-sale | | $ | 1,317,012 | | | $ | 12,301 | | | $ | 14,968 | | | $ | 1,314,345 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Securities Available-for-Sale | | | | | | | | | | | | | | | | | | | $ | 284,678 | | | $ | 5 | | | $ | 395 | | | $ | 284,288 | | U.S. government sponsored entities | | | 150,000 | | | | - | | | | 1,840 | | | | 148,160 | | Mortgage-backed securities | | | 1,073,108 | | | | 560 | | | | 11,399 | | | | 1,062,269 | | Collateralized mortgage obligations | | | 63 | | | | - | | | | 27 | | | | 36 | | Corporate debt securities | | | 74,955 | | | | 425 | | | | 1,525 | | | | 73,855 | | | | | 6,000 | | | | - | | | | 167 | | | | 5,833 | | Preferred stock of government sponsored entities | | | 2,811 | | | | 633 | | | | 228 | | | | 3,216 | | | | | 4,108 | | | | 4,929 | | | | 342 | | | | 8,695 | | Total securities available-for-sale | | $ | 1,595,723 | | | $ | 6,552 | | | $ | 15,923 | | | $ | 1,586,352 | |
|
Investments Classified by Contractual Maturity Date [Table Text Block] |
| | Securities Available-for-Sale | | | | | | | | | | | | | | | $ | 339,879 | | | $ | 339,823 | | Due after one year through five years | | | 553,130 | | | | 544,585 | | Due after five years through ten years | | | 75,111 | | | | 72,733 | | | | | 348,892 | | | | 357,204 | | | | $ | 1,317,012 | | | $ | 1,314,345 | |
|
Schedule of Unrealized Loss on Investments [Table Text Block] |
| | | | | | Temporarily Impaired Securities | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Securities Available-for-Sale | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 299,088 | | | $ | 857 | | | | 6 | | | $ | - | | | $ | - | | | | - | | | $ | 299,088 | | | $ | 857 | | | | 6 | | U.S. government sponsored entities | | | 390,331 | | | | 9,669 | | | | 8 | | | | - | | | | - | | | | - | | | | 390,331 | | | | 9,669 | | | | 8 | | Mortgage-backed securities | | | 328,236 | | | | 3,288 | | | | 16 | | | | 62 | | | | 2 | | | | 3 | | | | 328,298 | | | | 3,290 | | | | 19 | | Collateralized mortgage obligations | | | - | | | | - | | | | - | | | | 28 | | | | 20 | | | | 1 | | | | 28 | | | | 20 | | | | 1 | | Corporate debt securities | | | - | | | | - | | | | - | | | | 29,138 | | | | 862 | | | | 2 | | | | 29,138 | | | | 862 | | | | 2 | | | | | - | | | | - | | | | - | | | | 6,230 | | | | 270 | | | | 1 | | | | 6,230 | | | | 270 | | | | 1 | | Total securities available-for-sale | | $ | 1,017,655 | | | $ | 13,814 | | | | 30 | | | $ | 35,458 | | | $ | 1,154 | | | | 7 | | | $ | 1,053,113 | | | $ | 14,968 | | | | 37 | | | | | | | | Temporarily Impaired Securities | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Securities Available-for-Sale | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 224,289 | | | $ | 395 | | | | 5 | | | $ | - | | | $ | - | | | | - | | | $ | 224,289 | | | $ | 395 | | | | 5 | | U.S. government sponsored entities | | | 148,160 | | | | 1,840 | | | | 3 | | | | - | | | | - | | | | - | | | | 148,160 | | | | 1,840 | | | | 3 | | Mortgage-backed securities | | | 1,025,342 | | | | 11,398 | | | | 35 | | | | 6 | | | | 1 | | | | 2 | | | | 1,025,348 | | | | 11,399 | | | | 37 | | Collateralized mortgage obligations | | | - | | | | - | | | | - | | | | 36 | | | | 27 | | | | 1 | | | | 36 | | | | 27 | | | | 1 | | Corporate debt securities | | | 9,950 | | | | 50 | | | | 1 | | | | 43,525 | | | | 1,475 | | | | 3 | | | | 53,475 | | | | 1,525 | | | | 4 | | | | | - | | | | - | | | | - | | | | 5,833 | | | | 167 | | | | 1 | | | | 5,833 | | | | 167 | | | | 1 | | Preferred stock of government sponsored entities | | | 2,488 | | | | 228 | | | | 2 | | | | - | | | | - | | | | - | | | | 2,488 | | | | 228 | | | | 2 | | | | | 158 | | | | 342 | | | | 1 | | | | - | | | | - | | | | - | | | | 158 | | | | 342 | | | | 1 | | Total securities available-for-sale | | $ | 1,410,387 | | | $ | 14,253 | | | | 47 | | | $ | 49,400 | | | $ | 1,670 | | | | 7 | | | $ | 1,459,787 | | | $ | 15,923 | | | | 54 | |
|