Share-Based Compensation (Details 1)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Stock option activity in shares and weighted average price
Options outstanding, beginning of period, shares | shares	1,332,190
Options outstanding, beginning of period, weighted average price | $ / shares	$ 34.02
Options granted, shares | shares	0
Options granted, weighted average price | $ / shares	$ 0.00
Options canceled, shares | shares	(1,800)
Options canceled, weighted average price | $ / shares	$ 34.15
Options exercised, shares | shares	0
Options exercised, weighted average price | $ / shares	$ 0.00
Options outstanding, end of period, shares | shares	1,330,390
Options outstanding, end of period, weighted average price | $ / shares	$ 34.02
Options exercisable, end of period, shares | shares	1,330,390
Options exercisable, end of period, weighted average price | $ / shares	$ 34.02