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Segment Information - Reconciliation of Financial Information (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Reconciliation Of Segment Information [Line Items] |  |  |
Net Interest Income | $ 221,025 | $ 235,315 | $ 273,234
Depreciation Expense | 7,315 | 6,954 | 7,583
Other Expense | 181,214 | 181,014 | 180,734
Income Taxes | 25,131 | 25,701 | 34,415
Assets | 6,638,347 | 6,642,803 | 6,972,245
Deposits | 4,789,994 | 4,716,032 | 4,465,114
Totals for reportable segments |  |  |
Reconciliation Of Segment Information [Line Items] |  |  |
Net Interest Income | 218,197 | 230,573 | 271,079
Depreciation Expense | 7,315 | 6,954 | 7,583
Other Expense | 173,694 | 174,429 | 173,619
Income Taxes | 27,957 | 27,506 | 37,430
Assets | 6,643,994 | 6,656,933 | 7,014,353
Deposits | 4,903,564 | 4,822,465 | 4,619,691
Elimination of intersegment items |  |  |
Reconciliation Of Segment Information [Line Items] |  |  |
Net Interest Income | 8,659 | 8,558 | 4,492
Depreciation Expense | 0 | 0 | 0
Other Expense | 0 | 0 | 0
Income Taxes | 0 | 0 | 0
Assets | (30,369) | (35,639) | (63,243)
Deposits | (113,570) | (106,433) | (154,577)
Parent Co. totals - not eliminated |  |  |
Reconciliation Of Segment Information [Line Items] |  |  |
Net Interest Income | (5,831) | (3,816) | (2,337)
Depreciation Expense | 0 | 0 | 0
Other Expense | 7,520 | 6,585 | 7,115
Income Taxes | (2,826) | (1,805) | (3,015)
Assets | 24,722 | 21,509 | 21,135
Deposits | $ 0 | $ 0 | $ 0

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -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 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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