Accrued expenses and other liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accrued expenses and other liabilities
Accrued customer liabilities	$ 18,135	$ 15,219
Accrued construction in progress	12,246	20,930
Revenue share	8,972	5,514
Salaries and wages	3,504	4,425
Accrued taxes	3,421	2,745
Accrued professional fees	1,420	1,434
Accrued partner network	1,043	1,228
Holdback consideration	0	2,000
Acquisition purchase consideration	0	1,952
Other	6,966	7,206
Total accrued expenses and other liabilities	$ 55,707	$ 62,653