Business Combinations - Additional Information (Detail) $ in Thousands, CAD in Millions				12 Months Ended
	Jul. 02, 2015 USD ($)	Jul. 02, 2015 CAD	Oct. 04, 2013 USD ($)	Dec. 31, 2015 USD ($)	Jul. 02, 2015 CAD	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Contingent consideration liability				$ 2,951
Goodwill, net				548,959		$ 188,541
Simple Tax [Member]
Business Acquisition [Line Items]
Date of acquisition	Jul. 02, 2015	Jul. 02, 2015
Cash paid for acquisition	$ 1,900	CAD 2.4
Contingent consideration liability	$ 3,700				CAD 4.6
Period of performance for contingent consideration	3 years	3 years
Contingent consideration liability	$ 3,300			$ 3,300	4.1
Business combination, intangible assets other than goodwill	900				1.2
Goodwill, net	$ 4,500				CAD 5.6
Balance Financial [Member]
Business Acquisition [Line Items]
Date of acquisition			Oct. 04, 2013
Cash paid for acquisition			$ 4,900
Business combination, intangible assets other than goodwill			800
Indemnifications related to general representations and warranties			700
Escrow period expire date				Apr. 04, 2015
Identifiable net assets acquired			1,000
Goodwill, net			$ 3,100