Stock-Based Compensation - Stock Option Activity (Details) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Jun. 30, 2015
Stock options activity
Outstanding, beginning of period (in shares)		1,214,257
Granted (in shares)	0	379,315
Exercised (in shares)		(115,474)
Cancelled / Forfeited (in shares)		(85,970)
Outstanding, end of period (in shares)		1,392,128	1,214,257
Vested and exercisable, end of period (in shares)		796,089
Vested and expected to vest, end of period (in shares)		1,320,061
Weighted Average Exercise Price
Outstanding, beginning of period (in dollars per share)		$ 27.25
Granted (in dollars per share)		43.95
Exercised (in dollars per share)		21.14
Cancelled / Forfeited (in dollars per share)		36.24
Outstanding, end of period (in dollars per share)		31.75	$ 27.25
Vested and exercisable, end of period (in dollars per share)		24.95
Vested and expected to vest, end of period (in dollars per share)		$ 31.26
Weighted Average Remaining Contractual Term
Outstanding, end of period		7 years 6 months 15 days	7 years 3 months 4 days
Vested and exercisable, end of period		6 years 6 months 4 days
Vested and expected to vest, end of period		7 years 5 months 16 days
Aggregate Intrinsic Value
Outstanding, end of period		$ 12,075	$ 22,232
Vested and exercisable, end of period		11,144
Vested and expected to vest, end of period		$ 11,950