Summary of Significant Accounting Policies - Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Sales revenues:
System sales	$ 188,261	$ 185,665	$ 118,385
TruBridge	88,666	81,607	63,789
Costs of sales:
System sales	75,994	84,356	52,500
TruBridge	49,636	45,656	35,216
Operating expenses:
General and administrative	$ 46,923	52,888	$ 36,810
As previously reported
Sales revenues:
System sales		197,874
TruBridge		69,398
Costs of sales:
System sales		89,543
TruBridge		39,715
Operating expenses:
General and administrative		53,642
Reclassifications
Sales revenues:
System sales		(12,209)
TruBridge		12,209
Costs of sales:
System sales		(5,187)
TruBridge		5,941
Operating expenses:
General and administrative		$ (754)