Stockholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Nov. 17, 2016
Class Of Stock [Line Items]
Capitalized stock-based compensation costs	$ 0	$ 0	$ 0	$ 0
Stock options granted	0	0	0	0
Share issued, exercise of options and release of stock awards			1,100,000		1,500,000
Shares settled for tax withholding			552,000	564,000
Common stock repurchased, amount			$ 12,077,000	$ 52,075,000
Netsmart [Member]
Class Of Stock [Line Items]
Liability for outstanding awards	$ 2,800,000		$ 2,800,000
Estimated weighted average fair value, Black-Scholes-Merton option pricing model	$ 0.15		$ 0.15		$ 1.00
November 2016 Stock Repurchase Program [Member]
Class Of Stock [Line Items]
Stock repurchase program, authorized amount						$ 200,000,000
Common stock repurchased, shares	1,000,000		1,000,000
Common stock repurchased, amount	$ 12,100,000		$ 12,100,000