Components of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]
Ending balance	$ 37,176,000	$ 17,286,000
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	38,033	69,282	134,573
Before tax (loss) income	20,341	(31,249)	(65,291)
Other comprehensive (loss) income	20,341	(31,249)	(65,291)
Ending balance	58,374	38,033	69,282
Foreign Currency Gains And (Losses)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	17,312	19,095	(21,319)
Before tax (loss) income	5,649	(115)	38,813
Income tax effect	(799)	(1,668)	1,601
Other comprehensive (loss) income	4,850	(1,783)	40,414
Ending balance	22,162	17,312	19,095
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(499)	(933)	(250)
Before tax (loss) income	297	700	(1,101)
Income tax effect	(112)	(266)	418
Other comprehensive (loss) income	185	434	(683)
Ending balance	(314)	(499)	(933)
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(37,560)	(26,019)	(30,490)
Before tax (loss) income	(6,284)	(16,247)	7,363
Income tax effect	798	4,706	(2,892)
Other comprehensive (loss) income	(5,486)	(11,541)	4,471
Ending balance	(43,046)	(37,560)	(26,019)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	17,286	61,425	82,514
Before tax (loss) income	20,005	(46,911)	(20,216)
Income tax effect	(115)	2,772	(873)
Other comprehensive (loss) income	19,890	(44,139)	(21,089)
Ending balance	$ 37,176	$ 17,286	$ 61,425