Shareholders' Equity - Narrative (Details) - $ / shares |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2019 |
Dec. 31, 2018 |
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| Stockholders' Equity Note [Abstract] | ||
| Common stock, shares authorized (in shares) | 150,000,000 | |
| Common stock, shares issued (in shares) | 88,079,315 | 87,938,537 |
| Common stock, shares outstanding (in shares) | 83,066,135 | 82,948,577 |
| Preference shares issued (in shares) | 18,600,000 | |
| Undesignated shares (in shares) | 43,320,685 | |
| Shares repurchased for tax withholding (in shares) | 23,220 | 29,391 |
| Shares repurchased for tax withholding, price per share (in dollars per share) | $ 0.78 | $ 6.57 |
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- Definition Share Capital, Shares Authorized No definition available.
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- Definition Shares Paid For Tax Withholding For Share Based Compensation, Average Cost Per Share No definition available.
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- Definition Shares, Undesignated No definition available.
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement. No definition available.
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- References No definition available.
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