Employer Sponsored Benefit Plan (Plan Assets and Benefit Obligations) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Balance sheet amounts:
Noncurrent liabilities	$ (14,222)	$ (19,142)
Domestic Pension Plan
Change in benefit obligation:
Net benefit obligation at beginning of year	50,827	53,427
Interest cost	2,066	2,348	$ 2,453
Actuarial loss (gain)	(2,430)	7,654
Gross benefits paid	(2,382)	(12,602)
Net benefit obligation at end of year	48,081	50,827	53,427
Change in plan assets:
Fair value of plan assets at beginning of year	33,275	40,680
Actual return on plan assets	(1,106)	945
Contributions	5,626	4,252
Gross benefits paid	(2,382)	(12,602)
Fair value of plan assets at end of year	35,413	33,275	$ 40,680
Net benefit obligation in excess of plan assets	(12,668)	(17,552)
Balance sheet amounts:
Noncurrent liabilities	(12,668)	(17,552)
Total liabilities	(12,668)	(17,552)
Amounts recognized in accumulated other comprehensive income, net of tax consist of:
Net actuarial loss	17,313	17,228
Net amount recognized	$ 17,313	$ 17,228