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Employee Benefit Plans (Details) - Officer and Employee Plans [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Number |  |
Shares, Outstanding | 817,414 | 483,629
Shares, Granted | 0 | 52,689
Shares, Exercised | (89,556) | (24,292)
Shares, Share conversion |  | 23,468
Shares, Retained by Cornerstone shareholders in merger |  | 285,209
Shares, Forfeited | (10,334) | (3,289)
Shares, Outstanding | 717,524 | 817,414
Weighted Average Exercisable Price |  |
Weighted Average Exercisable Price, Outstanding (in dollars per share) | $ 10.62 | $ 10.20
Weighted Average Exercisable Price Granted (in dollars per share) | 0.00 | 15.05
Weighted Average Exercisable Price Exercised (in dollars per share) | 8.98 | 8.79
Weighted Average Exercisable Price, Share conversion (in dollars per share) |  | 9.71
Weighted Average Exercisable Price, Retained by Cornerstone shareholders in merger (in dollars per share) |  | 11.22
Weighted Average Exercisable Price Forfeited (in dollars per share) | 28.49 | 10.83
Weighted Average Exercise Price, Outstanding (in dollars per share) | $ 10.57 | $ 10.62

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- Definition It represents the share based compensation arrangements by share based payment award options retained by in merger weighted average exercise price. + References No definition available. + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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