Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2016
Temporary Equity [Line Items]
Preferred Stock, Shares Issued		120,000
Preferred Stock, Liquidation Preference, Value		$ 120.0
Preferred Stock, Value, Issued		$ 142.0
Preferred Stock, Dividend Rate, Percentage	8.00%
Preferred stock annual dividends	$ 9.6
Total shares available for issuance (in shares)		5,393,000
Preferred Stock Initial Conversion Price per Share	$ 22.25
Common Stock [Member]
Temporary Equity [Line Items]
Shares issued upon conversion (in shares)		44.9438