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Subsequent Event (Details Textual) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2015 | Jul. 30, 2015 | Dec. 31, 2014
Subsequent Event |  |  |  |
Subsequent Event, Date |  | Jul. 30, 2015 |  |
Subsequent Event, Description |  | the Company announced the signing of a definitive agreement to acquire Cañon National Bank, a community bank based in Cañon City, Colorado |  |
Total assets |  | $ 8,589,810,000 |  | $ 8,306,507,000
Gross loans | [1] | $ 4,807,431,000 |  | $ 4,488,095,000
Canon National Bank |  |  |  |
Subsequent Event |  |  |  |
Total assets |  |  | $ 253,000,000 |
Gross loans |  |  | 159,000,000 |
Total deposits |  |  | $ 225,000,000 |
[1] | Includes net deferred fees, costs, premiums and discounts of $13,312,000 and $13,710,000 at June 30, 2015 and December 31, 2014, respectively.

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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 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 + Details
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