Goodwill and Intangibles - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Gross carrying amount	$ 45,918	$ 47,308
Accumulated impairment losses	(36,155)	(37,545)
Net carrying value of goodwill	9,763	9,763
Personal Information Services
Goodwill [Line Items]
Gross carrying amount	35,253	35,253
Accumulated impairment losses	(25,837)	(25,837)
Net carrying value of goodwill	9,416	9,416
Insurance And Other Consumer Services
Goodwill [Line Items]
Gross carrying amount	10,665	10,665
Accumulated impairment losses	(10,318)	(10,318)
Net carrying value of goodwill	$ 347	347
Bail Bonds Industry Solutions
Goodwill [Line Items]
Gross carrying amount		1,390
Accumulated impairment losses		(1,390)
Net carrying value of goodwill		$ 0