Stockholders’ Equity - Summary of Preferred Stock Issued and Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	200,000,000	200,000,000
Shares Authorized (in shares)	30,900,000
Preferred stock, shares issued (in shares)	20,872,888	20,872,888
Preferred stock, shares outstanding (in shares)	20,872,888	20,872,888
Carrying Value	$ 504,765	$ 504,765
Liquidation Preference	$ 521,822
Liquidation preference (USD per share)	$ 25
Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	6,000,000
Preferred stock, shares issued (in shares)	3,156,087
Preferred stock, shares outstanding (in shares)	3,156,087
Carrying Value	$ 76,180
Liquidation Preference	$ 78,902
Contractual Rate	7.75%
Series C Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	6,600,000
Preferred stock, shares issued (in shares)	4,181,807
Preferred stock, shares outstanding (in shares)	4,181,807
Carrying Value	$ 101,102
Liquidation Preference	$ 104,545
Contractual Rate	7.875%
Series D Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	8,400,000
Preferred stock, shares issued (in shares)	6,123,495
Preferred stock, shares outstanding (in shares)	6,123,495
Carrying Value	$ 148,134
Liquidation Preference	$ 153,087
Contractual Rate	8.00%
Series D Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred Stock, Dividend Payment Rate, Basis Spread On Variable Rate	0.00057%
Series E Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	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
Liquidation Preference	$ 185,288
Contractual Rate	7.875%
Series E Preferred Stock | LIBOR
Class of Stock [Line Items]
Preferred Stock, Dividend Payment Rate, Basis Spread On Variable Rate	0.06429%