Stock-Based Compensation (Details 1) shares in Thousands	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Number of options (in thousands)
Options outstanding at beginning of period (in shares) | shares	3,225
Options granted (in shares) | shares	540
Options exercised (in shares) | shares	(223)
Options forfeited (in shares) | shares	(10)
Options expired (in shares) | shares	(272)
Options outstanding at end of period (in shares) | shares	3,260
Weighted average exercise price
Weighted average exercise price, Options outstanding Beginning Balance (usd per share) | $ / shares	$ 23.48
Weighted average exercise price, Options granted (usd per share) | $ / shares	14.80
Weighted average exercise price, Options exercised (usd per share) | $ / shares	14.93
Weighted average exercise price, Options forfeited (usd per share) | $ / shares	27.91
Weighted average exercise price, Options expired (usd per share) | $ / shares	23.22
Weighted average exercise price, Options outstanding Ending Balance (usd per share) | $ / shares	$ 22.64