Retirement Plans - Weighted Average Assumptions Used in Benefit Obligation (Detail) (Pension Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plans, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Discount rate	4.49%	3.60%	4.13%
Rate of compensation increase
Measurement date	2013-12-31	2012-12-31	2011-12-31