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Stock-Based Compensation (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2019 USD ($) tranche $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Aggregate intrinsic value of stock option exercised | $ 0
Granted Before November 13, 2015 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 3 years
Granted After November 13, 2015 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 3 years
Vesting percentage | 33.33%
2015 Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares outstanding (in shares) | shares | 0
Restricted Stock - Market Conditions |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares awarded (in shares) | shares | 241,000
Restricted Stock - Performance Measures |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares awarded (in shares) | shares | 370,000
Restricted Stock Awards And Restricted Stock Unit Awards |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock compensation expense | $ 33,334,000
Restricted Stock Awards And Restricted Stock Unit Awards | Weighted Average |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 1 year 9 months 18 days
Stock Options and Restricted Stock Awards | 2015 Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of tranches | tranche | 2
Trading Price For Stock Award Tranche One (in usd per share) | $ / shares | $ 30
Trading Price For Stock Award Tranche Two (in usd per share) | $ / shares | $ 40
Stock award tranche granting period | 90 days
Restricted Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock compensation expense | $ 69,000
Restricted Stock | Weighted Average |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 4 months 24 days
Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock compensation expense | $ 181,000
Stock Options | Weighted Average |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 4 months 24 days

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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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