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Federally Assisted Transactions (Narrative) (Details) (USD $) | 9 Months Ended | 0 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended
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Sep. 30, 2011 | Jan. 21, 2011 United Western Bank [Member] branchlocations | Mar. 31, 2011 United Western Bank [Member] | Sep. 30, 2011 United Western Bank [Member] | Sep. 30, 2011 United Western Bank [Member] loans | Sep. 30, 2011 United Western Bank [Member] Intrinsic Loss [Member] | Sep. 30, 2011 United Western Bank [Member] Net Loss Amount [Member] | Sep. 30, 2011 United Western Bank [Member] Asset Discount [Member] | Sep. 30, 2011 United Western Bank [Member] Shared Loss Assets [Member] | Sep. 30, 2011 United Western Bank [Member] FDIC [Member] Residential Mortgage Loans [Member] Loss share agreement, 80% coverage for tranche one [Member] | Sep. 30, 2011 United Western Bank [Member] FDIC [Member] Residential Mortgage Loans [Member] Loss share agreement, 80% coverage for tranche one [Member] Maximum [Member] | Sep. 30, 2011 United Western Bank [Member] FDIC [Member] Residential Mortgage Loans [Member] Loss share agreeement, 0% coverage for tranche two [Member] | Sep. 30, 2011 United Western Bank [Member] FDIC [Member] Residential Mortgage Loans [Member] Loss share agreeement, 0% coverage for tranche two [Member] Minimum [Member] | Sep. 30, 2011 United Western Bank [Member] FDIC [Member] Residential Mortgage Loans [Member] Loss share agreeement, 0% coverage for tranche two [Member] Maximum [Member] | Sep. 30, 2011 United Western Bank [Member] FDIC [Member] Residential Mortgage Loans [Member] Loss share agreeement, 80% coverage for tranche three [Member] | Sep. 30, 2011 United Western Bank [Member] FDIC [Member] Residential Mortgage Loans [Member] Loss share agreeement, 80% coverage for tranche three [Member] Minimum [Member] | Sep. 30, 2011 United Western Bank [Member] OREO [Member] Other Loans [Member] Loss share agreement, 80% coverage for tranche one [Member] | Sep. 30, 2011 United Western Bank [Member] OREO [Member] Other Loans [Member] Loss share agreement, 80% coverage for tranche one [Member] Maximum [Member] | Sep. 30, 2011 United Western Bank [Member] OREO [Member] Other Loans [Member] Loss share agreeement, 0% coverage for tranche two [Member] | Sep. 30, 2011 United Western Bank [Member] OREO [Member] Other Loans [Member] Loss share agreeement, 0% coverage for tranche two [Member] Minimum [Member] | Sep. 30, 2011 United Western Bank [Member] OREO [Member] Other Loans [Member] Loss share agreeement, 0% coverage for tranche two [Member] Maximum [Member] | Sep. 30, 2011 United Western Bank [Member] OREO [Member] Other Loans [Member] Loss share agreeement, 80% coverage for tranche three [Member] | Sep. 30, 2011 United Western Bank [Member] OREO [Member] Other Loans [Member] Loss share agreeement, 80% coverage for tranche three [Member] Minimum [Member] | Sep. 30, 2011 United Western Bank [Member] Residential Mortgage Loans [Member] years | Sep. 30, 2011 United Western Bank [Member] Other Loans [Member] years | Jul. 08, 2011 Colorado Capital Bank [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Intrinsic Loss [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Net Loss Amount [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Asset Discount [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Shared Loss Assets [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Residential Mortgage Loans [Member] years | Sep. 30, 2011 Colorado Capital Bank [Member] Other Loans [Member] years | Sep. 30, 2011 Colorado Capital Bank [Member] Loss share agreement, 80% coverage for tranche one [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Loss share agreement, 80% coverage for tranche one [Member] Maximum [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Loss share agreeement, 0% coverage for tranche two [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Loss share agreeement, 0% coverage for tranche two [Member] Minimum [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Loss share agreeement, 0% coverage for tranche two [Member] Maximum [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Loss share agreeement, 80% coverage for tranche three [Member] | Sep. 30, 2011 Colorado Capital Bank [Member] Loss share agreeement, 80% coverage for tranche three [Member] Minimum [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount on aggregate assets |  | $ 213,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 154,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposit premium |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of branches |  | 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss cover, percentage |  |  |  |  |  |  |  |  |  | 80.00% |  | 0.00% |  |  | 80.00% |  | 80.00% |  | 30.00% |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  | 80.00% |  | 0.00% |  |  | 80.00% |
Loss cover, amount |  |  |  |  |  |  |  |  |  |  | 32,489,000 |  | 32,489,000 | 57,653,000 |  | 57,653,000 |  | 111,517,000 |  | 111,517,000 | 227,032,000 |  | 227,032,000 |  |  |  |  |  |  |  |  |  |  |  | 230,991,000 |  | 230,991,000 | 285,947,000 |  | 285,947,000
Loss share agreement, term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 5 |  |  |  |  |  |  | 10 | 5 |  |  |  |  |  |  |
Loss share agreement, term in respect to loss recoveries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 5 |  |  |  |  |  |  | 10 | 5 |  |  |  |  |  |  |
Total intrinsic loss estimate related to FDIC assisted acquisition |  |  |  | 294,000,000 | 294,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
True-up payment percentage excess |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |
True-up payment percentage |  |  |  |  |  | 20.00% | 20.00% | 25.00% | 3.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% | 20.00% | 25.00% | 3.50% |  |  |  |  |  |  |  |  |
True-up payment amount |  |  |  |  |  | 58,800,000 |  | 52,898,000 | 37,936,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,142,000 |  | 38,725,000 | 19,295,000 |  |  |  |  |  |  |  |  |
Estimated future true-up payment |  |  |  | 11,827,000 | 11,827,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,349,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum period of fair value refinement after transaction closing date | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination Bargain Purchase Gain Adjustment |  |  |  | 2,034,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FDIC repurchased loans |  |  |  |  | 18 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bargain purchase gains |  |  | 63,474,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability |  |  | 24,856,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 34,377,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total intrinsic loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 285,708,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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