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Taxes - Changes in the Reserve for Income Taxes, Excluding Interest and Penalties (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning Balance of reserve for income taxes	$ 4,024	$ 4,148
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in prior periods	438	43
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in the current period	1,048	642
Gross amounts of decreases in unrecognized tax benefits relating to settlements with taxing authorities		(424)
Gross amounts of decreases in unrecognized tax benefits as a result of the expiration of the applicable statutes of limitations	(1,102)	(385)
Ending balance of reserve for income taxes	$ 4,408	$ 4,024

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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