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Mergers and Acquisitions (Unaudited Pro Forma Information) (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net interest income after loan loss provision | $ 9,310 | $ 8,579 | $ 8,173 | $ 8,138 | $ 8,075 | $ 7,970 | $ 7,924 | $ 8,186 | $ 6,738 | $ 18,360 | $ 16,213 | $ 32,975 | $ 30,818 | $ 24,583
Noninterest Income | 1,362 | 1,875 | 1,419 | 1,398 | 1,232 | 960 | 1,085 | 1,093 | 949 | 2,798 | 2,630 | 5,924 | 4,113 | 3,284
Noninterest expense | $ 7,558 | $ 7,740 | $ 7,165 | $ 6,921 | $ 6,982 | $ 6,882 | $ 6,569 | $ 6,642 | $ 6,640 | $ 15,360 | $ 13,903 | $ 28,818 | 26,759 | 20,704
Phoenix Bancorp Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net interest income after loan loss provision |  |  |  |  |  |  |  |  |  |  |  |  | 31,454 | 29,745
Noninterest Income |  |  |  |  |  |  |  |  |  |  |  |  | 4,152 | 4,131
Noninterest expense |  |  |  |  |  |  |  |  |  |  |  |  | 27,817 | 26,846
Net income available to common shareholders |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,811 | $ 5,259
Net income per common share |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.38 | $ 1.25

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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