Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Intangible assets, accumulated amortization	$ 4.0	$ 15.9
Intangible liabilities, accumulated amortization	$ 10.6	$ 9.8
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	18,570,642	18,162,148
Common stock, shares outstanding	18,570,642	18,162,148