Stock-Based Compensation (Non-vested Restricted Share Unit Activity) (Details) - Restricted Stock Units	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Awards
Beginning balance (in shares) | shares	908,082
Granted (in shares) | shares	396,552
Vested (in shares) | shares	(231,161)
Forfeited (in shares) | shares	(330,892)
Ending balance (in shares) | shares	742,581
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 7.48
Granted (in dollars per share) | $ / shares	7.65
Vested (in dollars per share) | $ / shares	7.37
Forfeited (in dollars per share) | $ / shares	7.48
Ending balance (in dollars per share) | $ / shares	$ 7.60