Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)
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Dec. 31, 2011
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Dec. 31, 2010
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | $ 1,294,478,000 | $ 2,003,567,000 |
Total assets | 1,301,423,000 | 2,012,160,000 |
Total liabilities | 3,125,000 | 8,453,000 |
Fair value of warrants | 218,000 | 40,000 |
Fair Value Measurements, Level 1 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 54,958,000 | 138,884,000 |
Total assets | 54,960,000 | 138,907,000 |
Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 1,239,520,000 | 1,864,683,000 |
Total assets | 1,246,245,000 | 1,873,213,000 |
Total liabilities | 3,125,000 | 8,453,000 |
Fair Value Measurements, Level 3 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 218,000 | 40,000 |
U.S. Treasury Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 118,828,000 | |
U.S. Treasury Securities [Member] | Fair Value Measurements, Level 1 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 118,828,000 | |
U.S. Government Sponsored Entities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 501,226,000 | 825,082,000 |
U.S. Government Sponsored Entities [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 501,226,000 | 825,082,000 |
State And Municipal Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 1,928,000 | 1,718,000 |
State And Municipal Securities [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 1,928,000 | 1,718,000 |
Mortgage-Backed Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 337,631,000 | 642,305,000 |
Mortgage-Backed Securities [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 337,631,000 | 642,305,000 |
Collateralized Mortgage Obligations [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 16,486,000 | 25,194,000 |
Collateralized Mortgage Obligations [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 16,486,000 | 25,194,000 |
Asset-Backed Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 166,000 | 240,000 |
Asset-Backed Securities [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 166,000 | 240,000 |
Corporate Debt Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 380,429,000 | 369,425,000 |
Corporate Debt Securities [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 380,429,000 | 369,425,000 |
Mutual Funds [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 6,035,000 | 3,927,000 |
Mutual Funds [Member] | Fair Value Measurements, Level 1 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 6,035,000 | 3,927,000 |
Preferred Stock Of Government Sponsored Entities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 1,654,000 | 719,000 |
Preferred Stock Of Government Sponsored Entities [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 1,654,000 | 719,000 |
Trust Preferred Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 45,963,000 | 14,437,000 |
Trust Preferred Securities [Member] | Fair Value Measurements, Level 1 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 45,963,000 | 14,437,000 |
Other Equity Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 2,960,000 | 1,692,000 |
Other Equity Securities [Member] | Fair Value Measurements, Level 1 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total securities available-for-sale | 2,960,000 | 1,692,000 |
Trading Securities [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 4,542,000 | 3,818,000 |
Trading Securities [Member] | Fair Value Measurements, Level 1 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 2,000 | 23,000 |
Trading Securities [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 4,540,000 | 3,795,000 |
Warrants [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 218,000 | 40,000 |
Warrants [Member] | Fair Value Measurements, Level 3 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 218,000 | 40,000 |
Option Contracts [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 34,000 | 106,000 |
Total liabilities | 5,000 | 72,000 |
Option Contracts [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 34,000 | 106,000 |
Total liabilities | 5,000 | 72,000 |
Foreign Exchange Contracts [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 2,151,000 | 4,629,000 |
Total liabilities | 486,000 | 1,873,000 |
Foreign Exchange Contracts [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total assets | 2,151,000 | 4,629,000 |
Total liabilities | 486,000 | 1,873,000 |
Interest Rate Swaps [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total liabilities | 2,634,000 | 6,508,000 |
Interest Rate Swaps [Member] | Fair Value Measurements, Level 2 [Member]
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Servicing Assets at Fair Value [Line Items] | ||
Total liabilities | $ 2,634,000 | $ 6,508,000 |