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STOCK OPTION PLAN (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) Officers $ / shares shares | Sep. 30, 2015
Number of Shares |  |
Options outstanding, beginning of period (in shares) | shares | 125,560 |
Granted (in shares) | shares | 0 |
Exercised (in shares) | shares | (4,023) |
Forfeited or expired (in shares) | shares | (16,252) |
Options outstanding, end of period (in shares) | shares | 105,285 |
Options exercisable, end of period (in shares) | shares | 105,285 |
Weighted Average Exercise Price |  |
Options outstanding, beginning of period (in dollars per share) | $ / shares | $ 25.73 |
Granted (in dollars per share) | $ / shares | 0.00 |
Exercised (in dollars per share) | $ / shares | 35.69 |
Forfeited or expired (in dollars per share) | $ / shares | 25.00 |
Options outstanding, end of period (in dollars per share) | $ / shares | 25.52 |
Options exercisable, end of period (in dollars per share) | $ / shares | $ 25.79 |
Weighted Average Remaining Contractual Term |  |
Options outstanding | 2 years 5 months 19 days | 2 years 8 months 5 days
Options exercisable | 2 years 5 months 9 days |
Aggregate Intrinsic Value |  |
Options outstanding, beginning of period | $ | $ 4,379 |
Granted | $ | 0 |
Exercised | $ | 229 |
Forfeited or expired | $ | 1,272 |
Options outstanding, end of period | $ | 8,147 |
Options exercisable, end of period | $ | $ 8,147 |
Number of Shares |  |
Nonvested shares outstanding, beginning of period (in shares) | shares | 20,656 |
Granted (in shares) | shares | 279,065 |
Vested (in shares) | shares | (13,927) |
Forfeited or expired (in shares) | shares | 0 |
Nonvested shares outstanding, end of period (in shares) | shares | 285,794 |
Weighted Average Fair Value at Grant |  |
Nonvested shares outstanding, beginning of period (in dollars per share) | $ / shares | $ 41.37 |
Granted (in dollars per share) | $ / shares | 86.47 |
Vested (in dollars per share) | $ / shares | 64.72 |
Forfeited or expired (in dollars per share) | $ / shares | 0.00 |
Nonvested shares outstanding, end of period (in dollars per share) | $ / shares | $ 84.27 |
Number of Company's Named Executive Officers with stock awards | Officers | 3 |
Executive award vesting period | 8 years |
Stock based compensation expense not yet recognized in income | $ | $ 21,900 |
Weighted average remaining period for unrecognized stock based compensation | 4 years 1 month 21 days |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the 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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- Definition For presentations that combine terminations, 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 or that expired. + 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)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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