Equity Incentive Plans (Nonvested Stock Option Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of the activity of stock option awards, shares
Options outstanding, beginning balance, shares	314
Granted, shares	295	300	200
Vested, shares	(134)
Forfeited, shares	(82)
Options outstanding, ending balance, shares	393	314
Options non vested, Wtd. avg. grant date fair value beginning balance (in dollars per share)	$ 3.84
Granted, Wtd. Avg. grant date fair value (in dollars per share)	2.09	$ 4.26	$ 2.92
Vested, Wtd. Avg. grant date fair value (in dollars per share)	3.29
Forfeited, Wtd. Avg. grant date fair value (in dollars per share)	3.10
Options non vested, Wtd. avg. grant date fair value ending balance (in dollars per share)	$ 2.90	$ 3.84
Stock Options
Summary of the activity of stock option awards, shares
Unrecognized compensation costs related to awards	$ 0.8
Expected weighted average period to recognize expense	2 years 6 months