Gross Amortized Cost and Fair Value of Securities Available for Sale and Related Gross Unrealized Gains and Losses Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2012
|
Dec. 31, 2011
|
---|---|---|
Schedule of Available-for-sale Securities [Line Items] | ||
Gross Amortized Cost | $ 429,611 | $ 639,579 |
Gross Unrealized Gains | 8,771 | 8,438 |
Gross Unrealized Losses | (136) | (2,069) |
Fair Value | 438,246 | 645,948 |
U.S. Treasury securities and U.S. Government agencies
|
||
Schedule of Available-for-sale Securities [Line Items] | ||
Gross Amortized Cost | 38,931 | 152,085 |
Gross Unrealized Gains | 547 | 814 |
Gross Unrealized Losses | (6) | (225) |
Fair Value | 39,472 | 152,674 |
Private label mortgage backed and other private label mortgage-related securities
|
||
Schedule of Available-for-sale Securities [Line Items] | ||
Gross Amortized Cost | 5,684 | 5,818 |
Gross Unrealized Gains | 3 | |
Gross Unrealized Losses | (1,276) | |
Fair Value | 5,687 | 4,542 |
Mortgage backed securities - residential
|
||
Schedule of Available-for-sale Securities [Line Items] | ||
Gross Amortized Cost | 190,569 | 287,013 |
Gross Unrealized Gains | 6,641 | 6,343 |
Gross Unrealized Losses | (27) | |
Fair Value | 197,210 | 293,329 |
Collateralized mortgage obligations
|
||
Schedule of Available-for-sale Securities [Line Items] | ||
Gross Amortized Cost | 194,427 | 194,663 |
Gross Unrealized Gains | 1,580 | 1,281 |
Gross Unrealized Losses | (130) | (541) |
Fair Value | $ 195,877 | $ 195,403 |