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Stock-based Compensation (Activity in the Stock Plan) (Details) - shares | 1 Months Ended | 3 Months Ended | 87 Months Ended | 135 Months Ended
--- | --- | --- | --- | ---
May. 31, 2014 | Mar. 31, 2016 | Mar. 31, 2016 | Mar. 31, 2016
Employee Stock Award Plan-2008 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of option awards vest and exercisable in installments |  | 20.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward] |  |  |  |
Beginning balance (in shares) |  | 1,394,578 | 1,900,000 |
Additional shares authorized (in shares) | 1,500,000 | 0 | 1,500,000 |
Number of awards granted (in shares) |  | (249,000) | (2,611,928) |
Number of awards forfeited or expired (in shares) |  | 100,600 | 458,106 |
Ending balance (in shares) |  | 1,246,178 | 1,246,178 | 1,246,178
Employee Stock Award Plan-2008 [Member] | Options Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Expiration period |  | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward] |  |  |  |
Number of option awards exercised (in shares) |  | 138,389 | 788,908 |
Employee Stock Award Plan-2008 [Member] | Unrestricted Stock Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward] |  |  |  |
Number of awards granted (in shares) |  | (870) | (7,215) |
Employee Stock Award Plan-2008 [Member] | Restricted Stock Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward] |  |  |  |
Number of restricted stock awards vested (in shares) |  | 18,394 | 36,970 |
Employee Stock Award Plan-2008 [Member] | Restricted Stock Awards [Member] | Share-based Compensation Award, Tranche One [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 3 years |  |
Employee Stock Award Plan-2008 [Member] | Restricted Stock Awards [Member] | Share-based Compensation Award, Tranche Two [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 5 years |  |
Director Plan - 2005 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward] |  |  |  |
Beginning balance (in shares) |  | 69,938 |  | 300,000
Number of awards granted (in shares) |  | 0 |  | (236,065)
Number of awards forfeited or expired (in shares) |  | 18,000 |  | 24,003
Ending balance (in shares) |  | 87,938 | 87,938 | 87,938
Director Plan - 2005 [Member] | Options Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward] |  |  |  |
Number of option awards exercised (in shares) |  | 14,987 |  | 29,794
Number of restricted stock awards vested (in shares) |  | 0 |  | 20,171

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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 + Details
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