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Stockholders’ Equity - Summary of Preferred Stock Issued and Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Shares Authorized (in shares)	30,900,000	15,890,000
Preferred stock, shares issued (in shares)	20,872,888	12,000,000
Preferred stock, shares outstanding (in shares)	20,872,888	12,000,000
Carrying Value	$ 504,765	$ 289,755
Preferred Stock, liquidation preference, value	$ 521,822	$ 300,000
Liquidation preference (USD per share)	$ 25
Series B Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)	6,000,000	6,000,000
Preferred stock, shares issued (in shares)	3,156,087	3,000,000
Preferred stock, shares outstanding (in shares)	3,156,087	3,000,000
Carrying Value	$ 76,180	$ 72,397
Preferred Stock, liquidation preference, value	$ 78,902	$ 75,000
Contractual Rate	7.75%	7.75%
Series C Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)	6,600,000	4,140,000
Preferred stock, shares issued (in shares)	4,181,807	3,600,000
Preferred stock, shares outstanding (in shares)	4,181,807	3,600,000
Carrying Value	$ 101,102	$ 86,862
Preferred Stock, liquidation preference, value	$ 104,545	$ 90,000
Contractual Rate	7.875%	7.875%
Series D Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)	8,400,000	5,750,000
Preferred stock, shares issued (in shares)	6,123,495	5,400,000
Preferred stock, shares outstanding (in shares)	6,123,495	5,400,000
Carrying Value	$ 148,134	$ 130,496
Preferred Stock, liquidation preference, value	$ 153,087	$ 135,000
Contractual Rate	8.00%	8.00%
Liquidation preference (USD per share)	$ 25
Series E Preferred Stock
Class of Stock [Line Items]
Shares Authorized (in shares)	9,900,000
Preferred stock, shares issued (in shares)	7,411,499
Preferred stock, shares outstanding (in shares)	7,411,499
Carrying Value	$ 179,349
Preferred Stock, liquidation preference, value	$ 185,288
Contractual Rate	7.875%

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The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

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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.

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