Share-Based Compensation (Details 3) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock [Member]
Restricted stock activity
Restricted shares outstanding, beginning of period, shares	1,414,012
Restricted shares outstanding, beginning of period, weighted average price	$ 14.81
Restricted shares granted, shares	609,238
Restricted shares granted, fair value, weighted average price	$ 2.64	$ 11.55	$ 14.86
Restricted shares canceled, shares	(232,482)
Restricted shares canceled, fair value, weighted average price	$ 13.65
Restricted shares vested, shares	(303,692)
Restricted shares vested, weighted average price	$ 20.04
Restricted shares outstanding, end of period, shares	1,487,076	1,414,012
Restricted shares outstanding, end of period, weighted average price	$ 8.94	$ 14.81
Restricted Stock Units (RSUs) [Member]
Restricted stock activity
Restricted shares outstanding, beginning of period, shares	374,950
Restricted shares outstanding, beginning of period, weighted average price	$ 13.36
Restricted shares granted, shares	216,450
Restricted shares granted, fair value, weighted average price	$ 1.98	$ 11.68	$ 15.01
Restricted shares canceled, shares	0
Restricted shares canceled, fair value, weighted average price	$ 0.00
Restricted shares vested, shares	0	0	0
Restricted shares vested, weighted average price	$ 0.00
Restricted shares outstanding, end of period, shares	591,400	374,950
Restricted shares outstanding, end of period, weighted average price	$ 9.20	$ 13.36