Pension, Profit Sharing, and Other Employee Benefit Plans (Component of Net Periodic Benefit) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Profit Sharing and Other Employee Benefit Plans [Abstract]
Net actuarial loss	$ (14,774,000)	$ (5,539,000)	$ (14,879,000)
Net periodic benefit cost not yet recognized	$ (14,774,000)	$ (5,539,000)	$ (14,879,000)