Equity and EPS - Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands						3 Months Ended								12 Months Ended
	Oct. 31, 2016	Aug. 01, 2016	Mar. 07, 2016	Mar. 10, 2015	Feb. 28, 2014	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Dividends declared (in dollars per share)	$ 0.02	$ 0.02	$ 0.08	$ 0.06	$ 0.05	$ 0.02	$ 0.02	$ 0	$ 0.08	$ 0	$ 0	$ 0	$ 0.06	$ 0.12
Dividends paid per common share (in dollars per share)	$ 0.02	$ 0.02	$ 0.08	$ 0.06	$ 0.05									$ 0.12	$ 0.06	$ 0.05
Dividends paid	$ 344	$ 344	$ 1,378	$ 1,087	$ 907									$ 2,066	$ 1,087	$ 907