Net Income (Loss) Per Share Net Income (Loss) Per Share (Details 1) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 09, 2016	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 23, 2015
Debt Instrument [Line Items]
Proceeds from Issuance of Common Stock, Gross			$ 75,000,000
Stock Issued During Period, Shares, New Issues	4,293,785		9,253,016
Proceeds from Issuance of Common Stock		$ 53,400,000	$ 49,513,000	$ 0	$ 122,584,000	$ 0
Payments for Commissions		$ 1,200,000
Stock Issued During Period, Price per Share		$ 8.11	$ 8.11		$ 8.11
Term Loan due 2020 [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt							$ 100,000,000
Common Stock
Debt Instrument [Line Items]
Sale of Stock, Authorized Amount	$ 200,000,000