v3.3.1.900

Condensed Consolidating Financial Information - Guarantor Subsidiaries - Condensed Consolidating Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net earnings		$ 2,438	$ 7,669	$ 6,454	$ 10,363	$ 7,392	$ 17,249	$ 13,368	$ (5,321)	$ 26,924	$ 32,688	$ 58,956
Unrealized gain (loss) on short-term investments										(641)	(285)	44
Other unrealized gain (loss)										24	(24)
Changes in pension plan assets and benefit obligations										7	17	(2)
Tax impact										254	105	(15)
Total Comprehensive Income (Loss)										26,568	32,501	58,983
Parent Company Only (issuer) [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings										26,924	32,688	58,956
Unrealized gain (loss) on short-term investments										(641)	(285)	44
Other unrealized gain (loss)										24	(24)
Changes in pension plan assets and benefit obligations										7	17	(2)
Tax impact										254	105	(15)
Total Comprehensive Income (Loss)										26,568	32,501	58,983
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings	[1]									31,225	38,740	15,567
Total Comprehensive Income (Loss)	[1]									31,225	38,740	15,567
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net earnings										(31,225)	(38,740)	(15,567)
Total Comprehensive Income (Loss)										$ (31,225)	$ (38,740)	$ (15,567)
[1] Foreign subsidiaries represent minor subsidiaries and are included in the guarantor subsidiaries' amounts.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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