Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	May 14, 2019	Apr. 15, 2019	Oct. 01, 2018
AmOne Corp [Member]
Business Acquisition [Line Items]
Closing date of acquisition			Oct. 01, 2018
Cash paid upon closing			$ 23,032
Cash paid for net assets acquired			2,700
Business Combination, post-closing payments			$ 8,000
Business combination, deferred consideration payment period			2 years
Business combination, deferred consideration payment description			post-closing payments, payable in equal semi-annual installments over a two year period, with the first installment being paid six months following the date of closing.
Date of acquisition			Oct. 01, 2018
CloudControlMedia, LLC [Member]
Business Acquisition [Line Items]
Closing date of acquisition		Apr. 15, 2019
Cash paid upon closing		$ 8,281
Cash paid for net assets acquired		800
Business Combination, post-closing payments		$ 7,500
Business combination, deferred consideration payment period		4 years
Business combination, deferred consideration payment description		The $7.5 million post-closing payments are payable in cash in equal semi-annual installments over a four year period, with the first installment payable six months following the date of closing.
Date of acquisition		Apr. 15, 2019
Business combination, contingent consideration payment description		The contingent consideration is payable for five years following the date of closing and is calculated every June 30 and December 31 for the preceding six months.
Business combination contingent consideration payable period		5 years
MyBankTracker.com, LLC [Member]
Business Acquisition [Line Items]
Closing date of acquisition	May 14, 2019
Cash paid upon closing	$ 4,511
Cash paid for net assets acquired	1,500
Business Combination, post-closing payments	$ 4,000
Business combination, deferred consideration payment period	2 years
Business combination, deferred consideration payment description	The $4.0 million post-closing payments are payable in cash in equal semi-annual installments over a two year period, with the first installment payable twelve months following the date of closing.
Date of acquisition	May 14, 2019
Business combination, contingent consideration payment description	The contingent consideration is calculated semi-annually for the preceding six months beginning on December 31, 2019 and ending on June 30, 2023.