Preferred Stock (Details Textual) - USD ($)	May 01, 2018	Jan. 19, 2018	Mar. 31, 2018	Dec. 31, 2017
Preferred Stock, Shares Issued		350,000	350,000	0
Preferred Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01	$ 0
Convertible Preferred Stock, Shares Issued upon Conversion			10,606,061
Common Stock, Par or Stated Value Per Share			$ 0.01	$ 0.01
Preferred Stock, Dividend Rate, Percentage		7.00%
Preferred stock per share annualized dividend		$ 70.00
Preferred Stock, Redemption Price Per Share		33.00
Minimum required closing share price for the Company to cause conversion		$ 47.85
Preferred Stock, Minimum Conversion Amount		$ 50,000,000
Minimum cash consideration in change of control to require conversion		90.00%
Minimum affirmative vote of preferred stockholders required to undertake certain transactions		66.66%
Option change in control redemption premium, less than 90% cash transaction		101.00%
Maximum parity stock issuable, amount		$ 250,000,000
Maximum aggregate value of outstanding preferred stock to issue parity stock		$ 100,000,000
Preferred stock ownership required for preemptive rights		75.00%
Preferred stock ownership required to have board observer		50.00%
Minimum ownership required to maintain registration rights		5.00%
Subsequent Event [Member]
Dividends, Preferred Stock, Paid-in-kind	$ 4,800,000
Cumulative Preferred Stock [Member]
Shares Issued, Price Per Share		$ 1,000
Stock Issued During Period, Value, New Issues		$ 350,000,000
Payments of Stock Issuance Costs		$ 7,600,000
On or prior to the first anniversary of the Issue Date [Domain]
Cash Change of Control Conversion Premium		130.00%
On or prior to the second anniversary of the Issue Date [Domain]
Cash Change of Control Conversion Premium		120.00%
On or prior to the third anniversary of the Issue Date [Domain]
Cash Change of Control Conversion Premium		105.00%
After the third anniversary of the Issue Date [Domain]
Cash Change of Control Conversion Premium		101.00%