Benefit Plans - Actuarial Present Value of Benefit Obligations (Detail)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Other Pension Plan, Defined Benefit [Member]	Jun. 30, 2013 Other Pension Plan, Defined Benefit [Member]	Dec. 31, 2012 Other Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		4.87%	5.75%	4.89%	4.87%	4.26%
Future compensation increase rate	2.75%	2.75%	3.25%	2.75%		2.75%