Accumulated Other Comprehensive Income (Loss) (Accumulated Other Comprehensive Income (Loss) Allocated to Company and Noncontrolling Interests) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss), Allocated to the Company	$ (239,003)	$ (199,106)	$ (145,544)
Accumulated other comprehensive income (loss), Allocated to noncontrolling interests	3	17	7
Accumulated other comprehensive income (loss) including non-controlling interest	(239,000)	(199,089)	(145,537)	$ (150,546)
Unrealized Gains (Losses) on Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss), Allocated to the Company	(16,404)	10,894	(8,734)
Accumulated other comprehensive income (loss), Allocated to noncontrolling interests	3	17	7
Accumulated other comprehensive income (loss) including non-controlling interest	(16,401)	10,911	(8,727)	21,938
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss), Allocated to the Company	(57,242)	(20,420)	(3,726)
Accumulated other comprehensive income (loss) including non-controlling interest	(57,242)	(20,420)	(3,726)	9,924
Pension Benefit Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive income (loss), Allocated to the Company	(165,357)	(189,580)	(133,084)
Accumulated other comprehensive income (loss) including non-controlling interest	$ (165,357)	$ (189,580)	$ (133,084)	$ (182,408)