Stock-Based Compensation (Details) - Summary Of Changes In CSEs Outstanding - Common stock equivalents	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base fee percentage (up to)	50.00%
Common Stock Equivalents (CSEs) [Roll Forward]
Outstanding at December 31, 2016 (in shares) | shares	107,338
Granted (in shares) | shares	2,989
Converted to common shares upon grant (in shares) | shares	(2,176)
Outstanding at June 30, 2017 (in shares) | shares	108,151
Per Share Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding at December 31, 2016 (in dollars per share) | $ / shares	$ 20.74
Granted (in dollars per share) | $ / shares	116.03
Converted to common shares upon grant (in dollars per share) | $ / shares	116.01
Outstanding at June 30, 2017 (in dollars per share) | $ / shares	$ 21.45