Income Taxes - Deferred Tax Assets and Liabilities as Classified in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Net deferred income tax liabilities	$ (28,923)	$ (24,473)
Short-term Debt [Member]
Operating Loss Carryforwards [Line Items]
Net deferred income tax assets	3,557	2,218
Net deferred income tax liabilities	(10)	(14)
Long-term Debt [Member]
Operating Loss Carryforwards [Line Items]
Net deferred income tax assets	130	155
Net deferred income tax liabilities	$ (32,600)	$ (26,832)