Business Combination (Net-assets acquired period adjustments) (Details) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
In Thousands, unless otherwise specified |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Goodwill of Acquired Business | $86,069 | $86,069 |
Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 5,007,604 | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 4,356,987 | ' |
BusinessAcquisitionPriceAllocationAssetsAcquiredLiabilitiesAssumedNet | 650,617 | ' |
Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -177,472 | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 34,465 | ' |
BusinessAcquisitionPriceAllocationAssetsAcquiredLiabilitiesAssumedNet | -211,937 | ' |
Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -22,048 | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 0 | ' |
BusinessAcquisitionPriceAllocationAssetsAcquiredLiabilitiesAssumedNet | -22,048 | ' |
Goodwill of Acquired Business | 22,048 | ' |
Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 4,830,132 | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 4,391,452 | ' |
BusinessAcquisitionPriceAllocationAssetsAcquiredLiabilitiesAssumedNet | 438,680 | ' |
Goodwill of Acquired Business | 61,320 | ' |
Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 4,808,084 | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 4,391,452 | ' |
BusinessAcquisitionPriceAllocationAssetsAcquiredLiabilitiesAssumedNet | 416,632 | ' |
Goodwill of Acquired Business | 83,368 | ' |
DepositsMember | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 3,472,951 | ' |
DepositsMember | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 21,489 | ' |
DepositsMember | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 0 | ' |
DepositsMember | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 3,494,440 | ' |
DepositsMember | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 3,494,440 | ' |
Securities Sold under Agreements to Repurchase [Member] | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 338,020 | ' |
Securities Sold under Agreements to Repurchase [Member] | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 20,465 | ' |
Securities Sold under Agreements to Repurchase [Member] | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 0 | ' |
Securities Sold under Agreements to Repurchase [Member] | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 358,485 | ' |
Securities Sold under Agreements to Repurchase [Member] | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 358,485 | ' |
Other Borrowings Member | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 348,624 | ' |
Other Borrowings Member | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 1,108 | ' |
Other Borrowings Member | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 0 | ' |
Other Borrowings Member | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 349,732 | ' |
Other Borrowings Member | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 349,732 | ' |
SubordinatedDebtMember | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 117,000 | ' |
SubordinatedDebtMember | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | -7,159 | ' |
SubordinatedDebtMember | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 0 | ' |
SubordinatedDebtMember | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 109,841 | ' |
SubordinatedDebtMember | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 109,841 | ' |
Accrued expenses and other liabilities | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 80,392 | ' |
Accrued expenses and other liabilities | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | -1,438 | ' |
Accrued expenses and other liabilities | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 0 | ' |
Accrued expenses and other liabilities | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 78,954 | ' |
Accrued expenses and other liabilities | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
BusinessAcquisitionPriceAllocationLiabilitiesAssumed | 78,954 | ' |
CashAndCashEquivalentsMember | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 394,638 | ' |
CashAndCashEquivalentsMember | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
CashAndCashEquivalentsMember | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
CashAndCashEquivalentsMember | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 394,638 | ' |
CashAndCashEquivalentsMember | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 394,638 | ' |
InvestmentsMember | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 561,623 | ' |
InvestmentsMember | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
InvestmentsMember | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
InvestmentsMember | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 561,623 | ' |
InvestmentsMember | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 561,623 | ' |
Loans receivable | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 3,678,979 | ' |
Loans receivable | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -118,913 | ' |
Loans receivable | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -26,635 | ' |
Loans receivable | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 3,560,066 | ' |
Loans receivable | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 3,533,431 | ' |
accounts receivable | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 19,133 | ' |
accounts receivable | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -18,252 | ' |
accounts receivable | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
accounts receivable | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 881 | ' |
accounts receivable | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 881 | ' |
Foreclosed real estate [Member] | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 44,853 | ' |
Foreclosed real estate [Member] | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -8,896 | ' |
Foreclosed real estate [Member] | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -1,932 | ' |
Foreclosed real estate [Member] | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 35,957 | ' |
Foreclosed real estate [Member] | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 34,025 | ' |
Deferred tax asset [Member] | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 35,327 | ' |
Deferred tax asset [Member] | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 50,005 | ' |
Deferred tax asset [Member] | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 9,455 | ' |
Deferred tax asset [Member] | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 85,332 | ' |
Deferred tax asset [Member] | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 94,787 | ' |
Property, Plant and Equipment [Member] | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 37,412 | ' |
Property, Plant and Equipment [Member] | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 29,067 | ' |
Property, Plant and Equipment [Member] | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
Property, Plant and Equipment [Member] | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 66,479 | ' |
Property, Plant and Equipment [Member] | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 66,479 | ' |
CoreDepositsMember | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
CoreDepositsMember | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 8,473 | ' |
CoreDepositsMember | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
CoreDepositsMember | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 8,473 | ' |
CoreDepositsMember | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 8,473 | ' |
Customer Relationships [Member] | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
Customer Relationships [Member] | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 5,060 | ' |
Customer Relationships [Member] | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
Customer Relationships [Member] | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 5,060 | ' |
Customer Relationships [Member] | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 5,060 | ' |
Other Assets Member | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 119,286 | ' |
Other Assets Member | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -7,663 | ' |
Other Assets Member | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -2,936 | ' |
Other Assets Member | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 111,623 | ' |
Other Assets Member | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 108,687 | ' |
Legacy goodwill [Member] | Book value of assets acquired and liabilities assumed [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 116,353 | ' |
Legacy goodwill [Member] | Fair value adjustment at purchase date of business acquisition [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | -116,353 | ' |
Legacy goodwill [Member] | Measurement period adjustment [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
Legacy goodwill [Member] | Adjusted fair value of assets acquired and liabilities assumed at purchase date [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | 0 | ' |
Legacy goodwill [Member] | Fair value as remeasured [Member] | ' | ' |
Business acquisition price allocation assets acquired liabilities assumed net [Abstract] | ' | ' |
Business Acquisition Price Allocation Assets Acquired | $0 | ' |