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Carrying Amount and Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Carrying Amount |  |
Financial assets |  |
Cash and cash equivalents | $ 254,684 | $ 187,040
Investment securities, available-for-sale | 3,318,953 | 3,683,005
Loans held for sale | 61,505 | 145,501
Loans receivable, net of ALLL | 3,870,334 | 3,266,571
Accrued interest receivable | 44,261 | 37,770
Non-marketable equity securities | 52,192 | 48,812
Total financial assets | 7,601,929 | 7,368,699
Financial liabilities |  |
Deposits | 5,612,880 | 5,364,461
FHLB advances | 967,382 | 997,013
Repurchase agreements and other borrowed funds | 322,779 | 299,540
Subordinated debentures | 125,526 | 125,418
Accrued interest payable | 3,568 | 4,675
Interest rate swaps | 2,004 | 16,832
Total financial liabilities | 7,034,139 | 6,807,939
Estimated Fair Value | Level 1 |  |
Financial assets |  |
Cash and cash equivalents | 254,684 | 187,040
Investment securities, available-for-sale | 0 | 0
Loans held for sale | 61,505 | 145,501
Loans receivable, net of ALLL | 0 | 0
Accrued interest receivable | 44,261 | 37,770
Non-marketable equity securities | 0 | 0
Total financial assets | 360,450 | 370,311
Financial liabilities |  |
Deposits | 4,153,782 | 3,585,126
FHLB advances | 0 | 0
Repurchase agreements and other borrowed funds | 0 | 0
Subordinated debentures | 0 | 0
Accrued interest payable | 3,568 | 4,675
Interest rate swaps | 0 | 0
Total financial liabilities | 4,157,350 | 3,589,801
Estimated Fair Value | Level 2 |  |
Financial assets |  |
Cash and cash equivalents | 0 | 0
Investment securities, available-for-sale | 3,318,953 | 3,683,005
Loans held for sale | 0 | 0
Loans receivable, net of ALLL | 3,758,724 | 3,184,987
Accrued interest receivable | 0 | 0
Non-marketable equity securities | 52,192 | 48,812
Total financial assets | 7,129,869 | 6,916,804
Financial liabilities |  |
Deposits | 1,486,996 | 1,789,134
FHLB advances | 986,292 | 1,027,101
Repurchase agreements and other borrowed funds | 322,779 | 299,540
Subordinated debentures | 72,554 | 70,895
Accrued interest payable | 0 | 0
Interest rate swaps | 2,004 | 16,832
Total financial liabilities | 2,870,625 | 3,203,502
Estimated Fair Value | Level 3 |  |
Financial assets |  |
Cash and cash equivalents | 0 | 0
Investment securities, available-for-sale | 0 | 0
Loans held for sale | 0 | 0
Loans receivable, net of ALLL | 194,190 | 186,201
Accrued interest receivable | 0 | 0
Non-marketable equity securities | 0 | 0
Total financial assets | 194,190 | 186,201
Financial liabilities |  |
Deposits | 0 | 0
FHLB advances | 0 | 0
Repurchase agreements and other borrowed funds | 0 | 0
Subordinated debentures | 0 | 0
Accrued interest payable | 0 | 0
Interest rate swaps | 0 | 0
Total financial liabilities | $ 0 | $ 0

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- Definition Fair value portion of amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13487-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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