INCOME TAXES - Net operating loss carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jul. 12, 2017
Operating loss carryforwards
Tax deductible goodwill	$ 63,900
Amount of goodwill recorded with tax deductible		$ 14,000
2014 Reorganization
Operating loss carryforwards
Amount of goodwill recorded with tax deductible	25,400
TransCentra
Operating loss carryforwards
Tax deductible goodwill	26,500
Novitex
Operating loss carryforwards
Tax deductible goodwill	12,000
Federal
Operating loss carryforwards
Net operating loss carryforwards	756,624
Federal | 2018 - 2021
Operating loss carryforwards
Net operating loss carryforwards	116,285
Federal | 2022 - 2026
Operating loss carryforwards
Net operating loss carryforwards	117,314
Federal | 2027 - 2037
Operating loss carryforwards
Net operating loss carryforwards	523,025
Federal | BancTec Holding N.V | 2018 - 2026
Operating loss carryforwards
Net operating loss carryforwards	28,800
Federal | BancTec B.V | 2018 - 2026
Operating loss carryforwards
Net operating loss carryforwards	7,800
State
Operating loss carryforwards
Net operating loss carryforwards	465,927
State | 2018 - 2021
Operating loss carryforwards
Net operating loss carryforwards	30,400
State | 2022 - 2026
Operating loss carryforwards
Net operating loss carryforwards	79,355
State | 2027 - 2037
Operating loss carryforwards
Net operating loss carryforwards	$ 356,172