Fair Value Measurements - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares	Dec. 31, 2014 USD ($) contingent_consideration_obligation $ / shares	Dec. 31, 2013 USD ($)	Nov. 03, 2014 USD ($)	Aug. 08, 2014 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of contingent consideration obligations | contingent_consideration_obligation		3
Contingent consideration payments	$ 1,870,000	$ 0	$ 0
Goodwill	226,034,000	$ 265,084,000
Goodwill impairment loss	$ 0
Book value of assets per share | $ / shares	$ 8.78	$ 11.08
Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	$ 1,968,000	$ 3,320,000
FolioDynamix
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of contingent consideration obligations | contingent_consideration_obligation		2
Contingent consideration payments		$ 1,900,000
Excess in settlement of contingent consideration liability	100,000
Goodwill				$ 166,171,000
KMI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill					$ 6,735,000
KMI | Impairment related and other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Excess in settlement of contingent consideration liability	800,000
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	0
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	2,000,000.0
Fair value, inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	1,200,000
Fair value, inputs, Level 3 | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	1,968,000	3,320,000
Fair value, inputs, Level 3 | FolioDynamix | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability		$ 1,900,000
FolioDynamix
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	166,200,000
Goodwill impairment loss	39,656,000
FolioDynamix | Fair value, inputs, Level 3 | Fair value, measurements, nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill (annual impairment assessment)	$ 126,500,000
Goodwill | FolioDynamix | Fair value, inputs, Level 3 | Fair value, measurements, nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value input, discount rate	23.40%
Common stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Share price of common stock | $ / shares	$ 11.45	$ 18.47