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Share-Based Payments - Schedule of Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |
Number of shares Options, Outstanding at beginning of period | 1,028,935 | 1,040,081 | 1,111,274
Number of shares Options, Granted | 217,700 | 56,666 | 193,500
Number of shares Options, Reinstated |  | 4,583 |
Number of shares Options, Expired and canceled | (4,186) | (1,000) | (29,532)
Number of shares Options, Forfeited prior to vesting | (17,360) | (15,252) | (729)
Number of shares Options, Exercised | (374,857) | (56,143) | (234,432)
Number of shares Options, Outstanding at end of period | 837,232 | 1,028,935 | 1,040,081
Number of shares Options, Vested and Expected to Vest | 850,232 | 1,028,935 | 1,040,081
Number of shares Options, Vested at end of period | 552,097 | 820,022 | 730,016
Weighted Average Exercise Price, Outstanding at beginning of period | $ 6.03 | $ 5.65 | $ 5.15
Weighted Average Exercise Price, Granted | 11.73 | 13.03 | 8.83
Weighted Average Exercise Price, Reinstated |  | 4.47 |
Weighted Average Exercise Price, Expired and canceled | 12.03 | 3.42 | 6.87
Weighted Average Exercise Price, Forfeited prior to vesting | 10.67 | 7.85 | 8.88
Weighted Average Exercise Price, Exercised | 4.46 | 5.51 | 5.72
Weighted Average Exercise Price, Outstanding at end of period | 8.06 | 6.03 | 5.65
Weighted Average Exercise Price, Vested and Expected to Vest | 8.06 | 6.03 | 5.65
Weighted Average Exercise Price, Vested at end of period | $ 6.33 | $ 5.10 | $ 4.67
Weighted Average Remaining Contractual Term (Years) | 5 years 9 months 11 days | 4 years 8 months 23 days | 5 years 7 months 6 days
Weighted Average Remaining Contractual Term (Years), Vested and Expected to Vest | 5 years 9 months 11 days | 4 years 8 months 23 days | 5 years 7 months 6 days
Weighted Average Remaining Contractual Term (Years), Vested | 4 years 1 month 2 days | 3 years 8 months 27 days | 4 years 1 month 24 days
Aggregate Intrinsic Value | $ 3,001 | $ 7,104 | $ 4,286
Aggregate Intrinsic Value, Vested and Expected to Vest | 3,001 | 7,104 | 4,286
Aggregate Intrinsic Value, Vested | $ 2,843 | $ 6,419 | $ 3,271

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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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