Employee Benefit Plans - Assumptions Used in Measuring Net Periodic Benefit Costs (Detail) (Pension Benefits [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	4.17%	5.17%	5.74%
Rate of increase in future compensation levels	3.30%	3.30%	3.39%
Expected long-term rate of return on plan assets	7.83%	7.84%	7.87%