Stockholders' Equity - Authorized Capital (Details) - shares	Dec. 31, 2017	Dec. 31, 2016	Nov. 01, 2016
Stockholders' Equity Note [Abstract]
Capital stock, shares authorized (in shares)			155,000,000
Common stock, shares authorized (in shares)	150,000,000	150,000,000	150,000,000
Preferred Stock, Shares Authorized			5,000,000