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Mortgage-backed securities might represent mortgage pass-through securities, collateralized mortgage obligations (CMO), real estate mortgage investment conduits (REMICs), CMO and REMIC residuals, and stripped mortgage-backed securities. 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It may include dividend income from equity securities that do not have readily determinable fair values that are reportable in Other Assets, and interest income on interest-only strips receivable (not in the form of a security) that are included in Other Assets. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 4 -Article 9 false 10 Total interest income 4 us-gaap_InterestAndDividendIncomeOperating us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 56570000 56570 false false false 2 false true false false 74261000 74261 false false false 3 false true false false 115288000 115288 false false false 4 false true false false 155698000 155698 false false false xbrli:monetaryItemType monetary Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 9, 51, 54 -IssueDate 2006-05-01 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1, 2 , 3, 4, 5 -Article 9 true 11 Interest Expense 3 us-gaap_InterestExpenseAbstract us-gaap true na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 12 Short-term debt 4 us-gaap_InterestExpenseDebt us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -36000 -36 false false false 2 false false false false 0 0     false false false 3 false true false false -36000 -36 false false false 4 false false false false 0 0     false false false xbrli:monetaryItemType monetary Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 7 -Article 9 false 14 Long-term debt 4 us-gaap_InterestExpenseSubordinatedNotesAndDebentures us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -2140000 -2140 false false false 2 false true false false -1502000 -1502 false false false 3 false true false false -3256000 -3256 false false false 4 false true false false -3310000 -3310 false false false xbrli:monetaryItemType monetary Interest expense incurred during the reporting period on subordinated notes and debentures. Includes amortization of expenses incurred in the issuance of subordinated notes and debentures. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subsection I false 15 Total interest expense 4 us-gaap_InterestExpense us-gaap true debit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false -21164000 -21164 false false false 2 false true false false -39001000 -39001 false false false 3 false true false false -39346000 -39346 false false false 4 false true false false -86642000 -86642 false false false xbrli:monetaryItemType monetary The cost of borrowed funds accounted for as interest that was charged against earnings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 9 -Subsection II Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 true 16 Net Interest Income 4 us-gaap_InterestIncomeExpenseNet us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 35406000 35406 false false false 2 false true false false 35260000 35260 false false false 3 false true false false 75942000 75942 false false false 4 false true false false 69056000 69056 false false false xbrli:monetaryItemType monetary Amount of net interest income or expense derived from banking operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 10 -Article 9 true 17 Provision for loan losses 3 us-gaap_ProvisionForLoanAndLeaseLosses us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -4321000 -4321 false false false 2 false true false false -14545000 -14545 false false false 3 false true false false -13797000 -13797 false false false 4 false true false false -30577000 -30577 false false false xbrli:monetaryItemType monetary The sum of the periodic provision charged to operations, based on an assessment of the uncollectibility of the loan and lease portfolio, the offset to which is either added to or deducted from the allowance account for the purpose of reducing loan receivable and leases to an amount that approximates their net realizable value (the amount expected to be collected). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 5 -Paragraph 168, 169, 170 -IssueDate 2006-05-01 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 false 18 Market valuation adjustments on trading instruments 3 us-gaap_MarketableSecuritiesUnrealizedGainLoss us-gaap true credit duration No definition available. false false false false false false false false false false false label false 1 false true false false -2909000 -2909 false false false 2 false true false false 4102000 4102 false false false 3 false true false false -12200000 -12200 false false false 4 false true false false -10107000 -10107 false false false xbrli:monetaryItemType monetary This item represents the total unrealized gain (loss) included in earnings for the period as a result of holding marketable securities categorized as trading, including the unrealized holding gain or loss of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain or loss which was included in other comprehensive income (a separate component of shareholders'' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any losses recognized for other than temporary impairments of the subject investments in debt and equity securities. 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Additionally, this item would include any losses recognized for other than temporary impairments of the subject investments in debt and equity securities. 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Additionally, this item would include any losses recognized for other than temporary impairments of the subject investments in debt and equity securities. 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No authoritative reference available. true 22 Operating expenses 3 us-gaap_OperatingExpenses us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -11227000 -11227 false false false 2 false true false false -10769000 -10769 false false false 3 false true false false -28533000 -28533 false false false 4 false true false false -21308000 -21308 false false false xbrli:monetaryItemType monetary Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No authoritative reference available. false 23 Realized gains, net 3 us-gaap_RealizedInvestmentGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false label false 1 false true false false 16080000 16080 false false false 2 false true false false 25525000 25525 false false false 3 false true false false 60417000 60417 false false false 4 false true false false 25988000 25988 false false false xbrli:monetaryItemType monetary The net realized gains or losses on investments during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 3 -Subparagraph a -Article 7 false 24 Net income (loss) before provision for income taxes 3 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 28813000 28813 false false false 2 false true false false 6336000 6336 false false false 3 false true false false 75667000 75667 false false false 4 false true false false -29220000 -29220 false false false xbrli:monetaryItemType monetary Sum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest. 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If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 false 35 Diluted weighted average shares outstanding 3 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 78852259 78852259 false false false 2 false true false false 66362723 66362723 false false false 3 false true false false 78661642 78661642 false false false 4 false true false false 59137864 59137864 false false false xbrli:sharesItemType shares The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period. 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