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Stock Options, Stock Grants and New Stock (Stock Options by Exercise Price Range) (Details) | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Number of Outstanding options (shares) | shares | 173,985
Number of exercisable options (shares) | shares | 88,025
$11.55 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices (dollars per share) | $ 11.55
Number of Outstanding options (shares) | shares | 82,342
Weighted average exercise price (dollars per share) | $ 11.55
Weighted average remaining contractual life in years (years) | 5 years 23 days
Number of exercisable options (shares) | shares | 62,342
Exercisable options, weighted average exercise price (dollars per share) | $ 11.55
$11.35 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices (dollars per share) | $ 11.35
Number of Outstanding options (shares) | shares | 25,076
Weighted average exercise price (dollars per share) | $ 11.35
Weighted average remaining contractual life in years (years) | 6 years 1 month 11 days
Number of exercisable options (shares) | shares | 13,184
Exercisable options, weighted average exercise price (dollars per share) | $ 11.35
$13.70 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices (dollars per share) | $ 13.70
Number of Outstanding options (shares) | shares | 27,801
Weighted average exercise price (dollars per share) | $ 13.70
Weighted average remaining contractual life in years (years) | 7 years 1 month 5 days
Number of exercisable options (shares) | shares | 10,647
Exercisable options, weighted average exercise price (dollars per share) | $ 13.70
$14.76 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices (dollars per share) | $ 14.76
Number of Outstanding options (shares) | shares | 9,260
Weighted average exercise price (dollars per share) | $ 14.76
Weighted average remaining contractual life in years (years) | 8 years 1 month 20 days
Number of exercisable options (shares) | shares | 1,852
Exercisable options, weighted average exercise price (dollars per share) | $ 14.76
$16.01 [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Range of Exercise Prices (dollars per share) | $ 16.01
Number of Outstanding options (shares) | shares | 29,506
Weighted average exercise price (dollars per share) | $ 16.01
Weighted average remaining contractual life in years (years) | 9 years 1 month 10 days
Number of exercisable options (shares) | shares | 0
Exercisable options, weighted average exercise price (dollars per share) | $ 16.01

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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 The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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