Consolidated Balance Sheets (Parenthetical)	Dec. 31, 2018 $ / shares shares
Common stock, par value (usd per share) | $ / shares	$ 0.01
Common stock, shares authorized (in shares)	150,000,000
Common stock, shares issued (shares)	34,403,250
Common stock, shares outstanding (shares)	34,403,250
Series B
Preferred stock, par value (usd per share) | $ / shares	$ 0.01
Preferred stock, per share liquidation value (usd per share) | $ / shares	$ 29
Preferred stock, shares authorized (in shares)	5,000,000
Preferred stock, shares issued (shares)	44,258
Preferred stock, shares outstanding (in shares)	44,258
Series F
Preferred stock, per share liquidation value (usd per share) | $ / shares	$ 20
Preferred stock, shares issued (shares)	0
Preferred stock, shares outstanding (in shares)	0
Preferred stock, redemption (usd per share) | $ / shares	$ 20