Shareholders' Equity - Schedule of Treasury Stock (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Movement in Treasury Stock [Roll Forward]
Treasury shares, beginning balance (in shares)	715,947	62,780
Purchases (in shares)	24,086	38,245
Exercise of stock options (in shares)	(722)	(1,266)
Restricted stock grants and other (in shares)	4,780	(51,388)
Stock receivable from termination of rights agreement		667,576
Treasury shares, ending balance (in shares)	744,091	715,947