Equity and Earnings (Loss) per Share (Detail) - Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ (4)	$ (233)
Other comprehensive income before reclassifications	(1,417)	530
Amounts reclassified from accumulated other comprehensive income	689	(301)
Net other comprehensive income (loss)	(728)	229
Ending Balance	(732)	(4)
Pension Plan Items [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(377)	(627)
Other comprehensive income before reclassifications	218	179
Amounts reclassified from accumulated other comprehensive income	(85)	71
Net other comprehensive income (loss)	133	250
Ending Balance	(244)	(377)
Post Employment Benefit Items [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	390	429
Other comprehensive income before reclassifications	(1,620)	333
Amounts reclassified from accumulated other comprehensive income	774	(372)
Net other comprehensive income (loss)	(846)	(39)
Ending Balance	(456)	390
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(17)	(35)
Other comprehensive income before reclassifications	(15)	18
Amounts reclassified from accumulated other comprehensive income	0	0
Net other comprehensive income (loss)	(15)	18
Ending Balance	$ (32)	$ (17)