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Securities Available-For-Sale (Tables) | 12 Months Ended
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Dec. 31, 2013
Securities [Abstract] |
Comparative Summary Of Mortgage-Backed Securities And Other Securities Available-For-Sale |
| 2013
|  |  | Gross |  | Gross |  | Estimated
| Amortized |  | unrealized |  | unrealized |  | fair
| cost |  | gains |  | losses |  | value
Mortgage-backed securities: |  |  |  |  |  |  |
Pass-through certificates: |  |  |  |  |  |  |
Government sponsored enterprises (GSE) | $ 366,884 |  | $ 8,573 |  | $ 5,113 |  | $ 370,344
Real estate mortgage investment conduits (REMICs): |  |  |  |  |  |  |
GSE | 497,575 |  | 1,699 |  | 14,047 |  | 485,227
Non-GSE | 4,474 |  | 126 |  | 48 |  | 4,552
| 868,933 |  | 10,398 |  | 19,208 |  | 860,123
Other securities: |  |  |  |  |  |  |
Equity investments-mutual funds | 510 |  | - |  | - |  | 510
Corporate bonds | 76,491 |  | 66 |  | 105 |  | 76,452
| 77,001 |  | 66 |  | 105 |  | 76,962
Total securities available-for-sale | $ 945,934 |  | $ 10,464 |  | $ 19,313 |  | $ 937,085
| 2012
|  |  | Gross |  | Gross |  | Estimated
| Amortized |  | unrealized |  | unrealized |  | fair
| cost |  | gains |  | losses |  | value
Mortgage-backed securities: |  |  |  |  |  |  |
Pass-through certificates: |  |  |  |  |  |  |
GSE | $ 456,441 |  | $ 22,996 |  | $ 99 |  | $ 479,338
Real estate mortgage investment conduits (REMICs): |  |  |  |  |  |  |
GSE | 694,087 |  | 7,092 |  | 62 |  | 701,117
Non-GSE | 7,543 |  | 266 |  | 33 |  | 7,776
| 1,158,071 |  | 30,354 |  | 194 |  | 1,188,231
Other securities: |  |  |  |  |  |  |
Equity investments-mutual funds | 12,998 |  | — |  | — |  | 12,998
Corporate bonds | 73,708 |  | 694 |  | — |  | 74,402
| 86,706 |  | 694 |  | — |  | 87,400
Total securities available-for-sale | $ 1,244,777 |  | $ 31,048 |  | $ 194 |  | $ 1,275,631
Summary Of Expected Maturity Distribution Of Debt Securities Available-For-Sale, Other Than Mortgage-Backed Securities |
Available-for-sale | Amortized cost |  | Estimated fair value
Due in one year or less | $ - |  | $ -
Due after one year through five years | 76,491 |  | 76,452
| $ 76,491 |  | $ 76,452
Activity Related To Credit Component Recognized In Earnings On Debt Securities |
| 2013 |  | 2012 |  | 2011
Balance, beginning of year | $ - |  | $ 578 |  | $ 330
Additions to the credit component on debt securities in which other-than-temporary |  |  |  |  |
impairment was not previously recognized | - |  | - |  | 248
Reductions due to sales | - |  | (578) |  | -
Cumulative pre-tax credit losses, end of year | $ - |  | $ - |  | $ 578
Gross Unrealized Losses On Mortgage-Backed Securities |
| December 31, 2013
| Less than 12 months |  | 12 months or more |  | Total
| Unrealized |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized |  | Estimated
| losses |  | fair value |  | losses |  | fair value |  | losses |  | fair value
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |
Pass-through certificates: |  |  |  |  |  |  |  |  |  |  |
GSE | $ 5,087 |  | $ 150,473 |  | $ 26 |  | $ 4,482 |  | $ 5,113 |  | $ 154,955
REMICs: |  |  |  |  |  |  |  |  |  |  |
GSE | 12,923 |  | 283,419 |  | 1,124 |  | 44,606 |  | 14,047 |  | 328,025
Non-GSE | 23 |  | 1,092 |  | 25 |  | 442 |  | 48 |  | 1,534
Other securities: |  |  |  |  |  |  |  |  |  |  |
Corporate bonds | 105 |  | 44,763 |  | - |  | - |  | 105 |  | 44,763
Total | $ 18,138 |  | $ 479,747 |  | $ 1,175 |  | $ 49,530 |  | $ 19,313 |  | $ 529,277
| December 31, 2012
| Less than 12 months |  | 12 months or more |  | Total
| Unrealized |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized |  | Estimated
| losses |  | fair value |  | losses |  | fair value |  | losses |  | fair value
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |
Pass-through certificates: |  |  |  |  |  |  |  |  |  |  |
GSE | $ 99 |  | $ 14,156 |  | $ - |  | $ - |  | $ 99 |  | $ 14,156
REMICs: |  |  |  |  |  |  |  |  |  |  |
GSE | 58 |  | 100,310 |  | 4 |  | 7,633 |  | 62 |  | 107,943
Non-GSE | - |  | - |  | 33 |  | 604 |  | 33 |  | 604
Total | $ 157 |  | $ 114,466 |  | $ 37 |  | $ 8,237 |  | $ 194 |  | $ 122,703

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