Redeemable Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	May 19, 2015	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Preferred stock, shares authorized		10,000,000	10,000,000
Preferred stock, par value (in dollars per share)		$ 0.01	$ 0.01
Convertible Preferred Stock, Shares Issued upon Conversion	38.0619
Convertible Preferred Stock, Threshold Percentage of Stock Price Trigger	150.00%
Minimum
Class of Stock [Line Items]
Convertible Preferred Stock, Threshold	20 days
Minimum | Call Option [Member]
Class of Stock [Line Items]
Option Indexed to Issuer's Equity, Strike Price	$ 26.27
Maximum
Class of Stock [Line Items]
Convertible Preferred Stock, Threshold	30 days
Retained Earnings/(Accumulated deficit)
Class of Stock [Line Items]
Preferred dividends paid		$ 6,792	$ 6,792	$ 6,792
Convertible Preferred Stock
Class of Stock [Line Items]
Common stock issuance for purchase of investment	120,750
Preferred Stock, Dividend Rate, Percentage	5.625%
Proceeds from Issuance of Preferred Stock, net of issuance costs	$ 117,200
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	$ 3,600
Preferred Stock, Liquidation Preference Per Share	$ 1,000
Convertible Preferred Stock | Retained Earnings/(Accumulated deficit)
Class of Stock [Line Items]
Preferred dividends paid		$ 6,800	$ 6,800	$ 6,800