Quarterly report pursuant to Section 13 or 15(d)

Net Income per Share - Additional Information (Details)

v3.10.0.1
Net Income per Share - Additional Information (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
May 23, 2017
Earnings Per Share [Abstract]          
Shares excluded from dilutive shares outstanding because their effect was anti-dilutive (in shares) (15,137) (36,028) (193,498) (245,009)  
Warrants strike price (in dollars per share)         $ 57.58
ClickPay          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Contingently issuable shares (in shares)     196,439