Pension, Profit Sharing, and Other Employee Benefit Plans (Net Periodic Benefit Cost) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pension, Profit Sharing, and Other Employee Benefit Plans [Abstract]
Interest cost on projected benefit obligation	$ 407	$ 403	$ 817	$ 794
Expected return on plan assets	(406)	(493)	(812)	(987)
Recognized net actuarial loss	259	68	551	116
Net periodic benefit cost	$ 260	$ (22)	$ 556	$ (77)