Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plans [Member]
Components of Net Periodic Benefit Cost (Credit):
Service cost	$ 940	$ 670	$ 651
Interest cost	27,219	27,636	28,266
Expected return on plan assets	(27,078)	(26,657)	(30,490)
Amortization of:
Prior service cost	2,843	2,751	2,979
Net actuarial loss	3,691	1,658	258
Settlement loss		1,135
Net periodic benefit cost	7,615	7,193	1,664
Actual return on plan assets	41,353	33,882	29,870
Employer contributions	2,274	8,221	8,689
Benefits paid	23,258	26,420	21,718
Net actuarial (gain) loss	17,251	50,209	51,703
Reclassification of prior service (cost) credit to earnings	(2,843)	(2,751)	(2,979)
Reclassification of actuarial loss to earnings	(3,691)	(2,793)	(258)
Currency translation and other adjustments	3,284	2,729	(491)
Total recognized in AOCI	14,001	47,394	47,975
Net amount recognized in total periodic benefit cost and AOCI	21,616	54,587	49,639
Medical Plan [Member]
Components of Net Periodic Benefit Cost (Credit):
Service cost	53	60	69
Interest cost	182	211	278
Amortization of:
Net periodic benefit cost	235	271	347
Employer contributions	176	275	347
Benefits paid	176	275	347
Net actuarial (gain) loss	(647)	310	(438)
Total recognized in AOCI	(647)	310	(438)
Net amount recognized in total periodic benefit cost and AOCI	$ (412)	$ 581	$ (91)