Commitments and Contingencies - Additional Information (Details) - USD ($)		3 Months Ended
	Nov. 02, 2017	Mar. 31, 2020	Jun. 30, 2016	Dec. 31, 2019
Commitments And Contingencies [Line Items]
Redemption of Series B preferred stock at face value plus accrued dividends		$ 187,483,000		$ 185,049,000
Local Tax Assessment
Commitments And Contingencies [Line Items]
Tax assessment period, beginning date		Jun. 01, 2005
Tax assessment period, ending date		May 31, 2015
Proposed underpaid tax, applicable interest and penalties amount		$ 1,993,624
Local tax assessment, estimated probable loss			$ 535,000
Series B Preferred Stock Litigation
Commitments And Contingencies [Line Items]
Claiming percentage of litigation	94.16%
Redemption of Series B preferred stock at face value plus accrued dividends		$ 187,500,000
Loss contingency, description of damages sought		The complaint requests relief including, among other things, an order interpreting and enforcing the Certificate of Designations, preventing us from making any additional payments on the Notes and requiring us to redeem the Series B preferred stock at face value plus accrued dividends (or approximately $187.5 million as of March 31, 2020, as well as unspecified money damages and a declaration that Section 10.4 of the Charter is invalid.