The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders.

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Amount of undistributed earnings (loss) allocated to common stock as if earnings had been distributed. Excludes distributed earnings.

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Significant Accounting Policies - Computation of Basic and Diluted Net Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended							9 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Allocation of distributable earnings									$ 11,149	$ 10,091
Allocation of earnings (loss) attributed to shareholders	$ (27,534)	$ (85,295)	$ (26,077)	$ (25,966)	$ (20,896)	$ 550	$ (19,765)	$ (27,040)	$ (164,872)	$ (67,151)
Earnings Per Share, Basic and Diluted					$ (0.38)	$ 0.01	$ (0.36)	$ (0.49)	$ (2.89)	$ (1.21)
Common Shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Allocation of distributable earnings									$ 0	$ 0
Allocation of undistributable loss									(164,872)	(67,151)
Allocation of earnings (loss) attributed to shareholders									$ (164,872)	$ (67,151)
Weighted average number of shares - basic diluted (in shares)									57,093,454	55,304,083
Earnings Per Share, Basic and Diluted									$ (2.89)	$ (1.21)