Equity (Details)	3 Months Ended
	Mar. 31, 2017 USD ($) day $ / shares shares	Mar. 31, 2016 USD ($) shares	Dec. 31, 2016 USD ($) $ / shares shares
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001		$ 0.001
Common stock shares authorized	250,000,000
Stock repurchased during period (shares)	0	0
Stock repurchased during period | $	$ 0	$ 0
Common stock authorized for repurchase | $	$ 118,700,000
Preferred shares authorized (shares)	4,000,000		4,000,000
Preferred stock issued (shares)	0		0
Preferred shares outstanding (shares)	0		0
Series A preferred shares authorized (shares)	1,000,000		1,000,000
Series A preferred shares accrued dividends | $			$ 3,000,000
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Series A preferred shares authorized (shares)	1,000,000.0
Series A preferred shares par value (in usd per share) | $ / shares	$ 0.001
Series A preferred shares issued (shares)	200,000
Series A preferred shares stated value per share (in usd per share) | $ / shares	$ 1,000
Series A preferred shares dividend rate (percent)	6.00%
Series A preferred shares accrued dividends | $	$ 3,000,000
Series A preferred shares conversion price (in usd per share) | $ / shares	$ 14.50
Series A preferred shares, minimum stock price threshold for conversion (in usd per share) | $ / shares	$ 29.00
Series A preferred shares, number of conservative trading days | day	20
Series A preferred shares percentage of stated redemption value (percent)	100.00%
Series A Preferred Stock [Member] | Blackstone [Member]
Class of Stock [Line Items]
Series A preferred shares percentage of stated redemption value (percent)	101.00%
Series A preferred shares redemption value | $	$ 200,000,000
Pro forma [Member] | Series A Preferred Stock [Member]
Class of Stock [Line Items]
Series A preferred shares dividend rate (percent)	8.00%
Series A preferred shares, number of shares issuable if converted (shares)	13,793,100