Consolidated Statements of Stockholders' Equity (Parenthetical) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) shares
Statement of Stockholders' Equity [Abstract]
Shares repurchased (shares) | shares	100,000
Preferred shares converted into common stock (shares) | shares	100,000
Cash dividends declared and paid	$ 9,000
Inducements paid	12,000
Convertible preferred stock accretion of beneficial conversion feature	17,567	[1]
Acquired value of beneficial conversion feature	6,100
Series A Convertible Preferred Stock
Cash dividends declared and paid	9,000
Inducements paid	$ 15,000

[1] Represents total accretion of $17.6 million, net of $6.1 million acquired value of beneficial conversion feature attributable to repurchased Series A Convertible Preferred Stock.