Pension Plan - Schedule of Plan's Weighted Average Asset Allocations (Detail)	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	3.00%	6.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	66.00%	63.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	30.00%	31.00%
Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	1.00%	0.00%