Share-Based Compensation - Summary of Stock Option Activity (Details)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Shares
Outstanding, beginning of period (in shares) | shares	1,233,911
Granted (in shares) | shares	363,895
Exercised (in shares) | shares	(435,562)
Forfeited or Expired (in shares) | shares	(31,334)
Outstanding, end of period (in shares) | shares	1,130,910
Exercisable, end of period (in shares) | shares	448,371
Weighted Average Exercise Price
Outstanding, beginning of period (weighted average exercise price) | $ / shares	$ 8.16
Granted (weighted average exercise price) | $ / shares	22.79
Exercised (weighted average exercise price) | $ / shares	6.42
Forfeited or Expired (weighted average exercise price) | $ / shares	14.02
Outstanding, end of period (weighted average exercise price) | $ / shares	13.38
Exercisable, end of period (weighted average exercise price) | $ / shares	$ 7.54