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Securities (Details 3) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013
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Available for Sale |
Amortized Cost, Total | $ 540,336
Estimated Fair Value, Total | 549,391
Held for Investment [Member] |
Contractual maturity of debt securities |
Amortized cost, Within one year | 4,590
Amortized cost, After one year but within five years | 9,898
Amortized cost, After five years but within ten years | 1,179
Amortized cost, After ten years | 432
Amortized cost, Total | 16,099
Estimated Fair Value, Within one year | 4,627
Estimated Fair Value, After one year but within five years | 9,999
Estimated Fair Value, After five years but within ten years | 1,212
Estimated Fair Value, After ten years | 479
Estimated Fair Value Total | 16,317
Available for Sale [Member] |
Available for Sale |
Amortized Cost, Within one year | 191,802
Amortized Cost, After one year but within five years | 219,323
Amortized Cost, After five years but within ten years | 34,426
Amortized Cost, After ten years | 87,206
Total debt securities | 532,757
Amortized Cost, Equity securities | 7,579
Amortized Cost, Total | 540,336
Estimated Fair Value, Within one year | 192,015
Estimated Fair Value, After one year but within five years | 221,790
Estimated Fair Value, After five years but within ten years | 35,851
Estimated Fair Value, After ten years | 89,611
Total debt securities | 539,267
Estimated Fair Value, Equity securities | 10,124
Estimated Fair Value, Total | $ 549,391

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