Employee Benefit Plans - Components of Net Periodic Pension Benefit of Pension Plan and Excess Pension Plan (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Interest cost	$ 1,756	$ 2,062	$ 2,405
Expected return on assets	(4,344)	(4,231)	(4,756)
Recognized net actuarial loss	2,037	2,718	1,803
Amortization of prior service (credit) cost	(1,555)	(1,555)	(1,555)
Settlement loss	42	792	1,204
Total net periodic pension benefit (income)	$ (2,064)	$ (214)	$ (899)