Employee Benefit Plans (Weighted-Average Assumptions Used to Determine Benefit Obligations) (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Benefit obligations, Discount rate	4.24%	4.55%	4.20%
Net periodic benefit cost, Discount rate	4.55%	4.20%	5.00%
Net periodic benefit cost, Expected return on plan assets	7.25%	7.25%	7.25%