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Fair Value Measurements (Fair Value, Assets And Liabilities Measured On Recurring And Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale | $ 937,085 | $ 1,275,631
Recurring Basis [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale | 937,085 | 1,275,631
Trading securities | 5,998 | 4,677
Total | 943,083 | 1,280,308
Recurring Basis [Member] | GSE [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage-backed securities | 855,571 | 1,180,455
Recurring Basis [Member] | Non-GSE [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage-backed securities | 4,552 | 7,776
Recurring Basis [Member] | Corporate Bonds [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other securities | 76,452 | 74,402
Recurring Basis [Member] | Equities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other securities | 510 | 12,998
Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 26,942 | 36,479
Commercial and industrial loans | 616 | 452
Other real estate owned | 634 | 870
Total | 28,192 | 37,801
Level 1 [Member] | Recurring Basis [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale | 510 | 12,998
Trading securities | 5,998 | 4,677
Total | 6,508 | 17,675
Level 1 [Member] | Recurring Basis [Member] | Equities [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other securities | 510 | 12,998
Level 2 [Member] | Recurring Basis [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale | 936,575 | 1,262,633
Total | 936,575 | 1,262,633
Level 2 [Member] | Recurring Basis [Member] | GSE [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage-backed securities | 855,571 | 1,180,455
Level 2 [Member] | Recurring Basis [Member] | Non-GSE [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage-backed securities | 4,552 | 7,776
Level 2 [Member] | Recurring Basis [Member] | Corporate Bonds [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other securities | 76,452 | 74,402
Level 3 [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 26,942 | 36,479
Commercial and industrial loans | 616 | 452
Other real estate owned | 634 | 870
Total | 28,192 | 37,801
Commercial Real Estate [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 23,572 | 29,109
Commercial Real Estate [Member] | Level 3 [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 23,572 | 29,109
One-to-Four Family Residential Mortgage [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 340 | 1,827
One-to-Four Family Residential Mortgage [Member] | Level 3 [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 340 | 1,827
Construction and Land [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 109 | 2,070
Construction and Land [Member] | Level 3 [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 109 | 2,070
Multi Family [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 1,579 | 1,530
Multi Family [Member] | Level 3 [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 1,579 | 1,530
Home Equity Line of Credit | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | 1,342 | 1,943
Home Equity Line of Credit | Level 3 [Member] | Nonrecurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans | $ 1,342 | $ 1,943

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