Restructuring Charges - Additional Information (Detail) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2015 center	Jun. 30, 2015 USD ($)	Dec. 31, 2016 USD ($) property center	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 1,731	$ 1,642	$ 0
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Number of financial centers closed | center	6		4
Restructuring charges		$ 1,600	$ 1,900
Lease cancellations
Restructuring Cost and Reserve [Line Items]
Restructuring charges			115
Properties with Renegotiated Lease Terms [Member] | Lease cancellations
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ (152)
Number of properties with renegotiations on lease terms | property			2