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Activity in Goodwill, by Reporting Unit (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Line Items] |  |  |
Beginning balance, January 1, | $ 100,722 | $ 105,455 | $ 104,866
Acquisitions and dispositions, net | (324) | (6,454) | 148
Cash consideration paid | 88 | 1,721 | 441
Ending balance, December 31, | 100,486 | 100,722 | 105,455
Community Banking |  |  |
Goodwill [Line Items] |  |  |
Beginning balance, January 1, | 91,455 | 96,541 | 96,717
Acquisitions and dispositions, net |  | (6,454) | (176)
Cash consideration paid |  | 1,368 |
Ending balance, December 31, | 91,455 | 91,455 | 96,541
Insurance Services |  |  |
Goodwill [Line Items] |  |  |
Beginning balance, January 1, | 9,267 | 8,914 | 8,149
Acquisitions and dispositions, net | (324) |  | 324
Cash consideration paid | 88 | 353 | 441
Ending balance, December 31, | $ 9,031 | $ 9,267 | $ 8,914

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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 -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 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the 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 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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