Earnings Per Share (Details) - shares		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Stock options
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	63,019	926,898
Restricted Stock Units (RSUs)
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	610,642	797,401
Warrants | Private placement
Earnings Per Share [Line Items]
Antidilutive securities (in shares)		6,160,000	6,160,000
Warrants | Public
Earnings Per Share [Line Items]
Antidilutive securities (in shares)		9,823,072	9,823,072
Director | Restricted Stock
Earnings Per Share [Line Items]
Antidilutive securities (in shares)	[1]	122,929	78,754

[1] SARs and Phantom Shares are payable in cash so will therefore have no impact on number of shares