Segment Information - Information on Reportable Segments for Reconciliation to Consolidated Net Income (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Segment	Jun. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			2
Revenue:
Revenues	$ 139,162	$ 120,108	$ 321,537	$ 285,873
Operating income:
Total operating income	29,995	22,354	73,884	61,800
Discontinued operations, net of income taxes	0	(19,975)	0	(17,453)
Net income	3,480	(14,330)	34,190	8,481
Corporate-level activity [Member]
Operating income:
Total operating income	(18,926)	(17,366)	(40,023)	(36,399)
Segment Reconciling Items [Member]
Operating income:
Other loss, net	(24,200)	(10,916)	(33,908)	(18,430)
Income tax expense	(2,315)	(5,793)	(5,786)	(17,436)
Discontinued operations, net of income taxes	0	(19,975)	0	(17,453)
Wealth Management [Member]
Revenue:
Revenues	85,296	76,117	167,963	153,408
Wealth Management [Member] | Operating Segments [Member]
Revenue:
Revenues	85,296	76,117	167,963	153,408
Operating income:
Total operating income	12,406	9,924	24,259	20,830
Tax Preparation [Member]
Revenue:
Revenues	53,866	43,991	153,574	132,465
Tax Preparation [Member] | Operating Segments [Member]
Revenue:
Revenues	53,866	43,991	153,574	132,465
Operating income:
Total operating income	$ 36,515	$ 29,796	$ 89,648	$ 77,369