Share-Based Payments (Summary of Stock Option Activity) (Details) - Stock Option Plan [Member] - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding beginning balance, Common shares under option	3,366,714
Granted, Common shares under option	768,136
Assumed in acquisition, Common shares under option	737,358
Exercised, Common shares under option	(256,511)
Forfeited, Common shares under option	(76,522)
Outstanding ending balance, Common shares under option	4,539,175	3,366,714
Exercisable, Common shares under option	1,839,149
Outstanding beginning balance, Weighted average exercise price (per share)	$ 24.02
Granted, Weighted average exercise price (per share)	32.15
Assumed in acquisition, Weighted average exercise price (per share)	14.26
Exercised, Weighted average exercise price (per share)	23.52
Forfeited, Weighted average exercise price (per share)	18.78
Outstanding ending balance, Weighted average exercise price (per share)	23.93	$ 24.02
Exercisable, Weighted average exercise price (per share)	$ 23.33
Outstanding, Weighted average remaining contractual life (in years)	7 years 8 months 12 days	7 years 6 months
Exercisable, Weighted average remaining contractual life (in years)	6 years 3 months 18 days
Outstanding beginning balance, Aggregate intrinsic value	$ 33,601
Exercised, Aggregate intrinsic value	2,234
Outstanding ending balance, Aggregate intrinsic value	24,741	$ 33,601
Exercisable, Aggregate intrinsic value	$ 10,048