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Changes in Goodwill, by Reporting Unit (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Goodwill [Line Items] |  |  |  |
Beginning balance, January 1, |  | $ 100,486 | $ 100,722 | $ 105,455
Acquisitions and dispositions, net |  | (4,707) | (324) | (6,454)
Cash consideration paid |  |  | 88 | 1,721
Ending balance, December 31, |  | 95,779 | 100,486 | 100,722
Community Banking |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance, January 1, |  | 91,455 | 91,455 | 96,541
Acquisitions and dispositions, net |  | 1,290 |  | (6,454)
Other | [1] | 3,034 |  |
Cash consideration paid |  |  |  | 1,368
Ending balance, December 31, |  | 95,779 | 91,455 | 91,455
Insurance Services |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance, January 1, |  | 9,031 | 9,267 | 8,914
Acquisitions and dispositions, net |  | (5,997) | (324) |
Other | [1] | $ (3,034) |  |
Cash consideration paid |  |  | 88 | 353
Ending balance, December 31, |  |  | $ 9,031 | $ 9,267
[1] | Represents the transfer of goodwill after the sale of Greenpoint to one reporting unit

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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 (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=73531572&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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