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Goodwill and Other Intangible Assets - (Details) | 3 Months Ended
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Mar. 31, 2017 USD ($)
Goodwill [Roll Forward] |
Balance at January 1, 2017 | $ 470,534,000
Addition to goodwill from acquisition | 0
Adjustment to previously recorded goodwill | 0
Balance at March 31, 2017 | 470,534,000
Adjustments to goodwill | 0
Community Banks |
Goodwill [Roll Forward] |
Balance at January 1, 2017 | 467,767,000
Addition to goodwill from acquisition | 0
Adjustment to previously recorded goodwill | 0
Balance at March 31, 2017 | 467,767,000
Insurance |
Goodwill [Roll Forward] |
Balance at January 1, 2017 | 2,767,000
Addition to goodwill from acquisition | 0
Adjustment to previously recorded goodwill | 0
Balance at March 31, 2017 | $ 2,767,000

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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