Pre-Tax Book Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pre-tax Income [Line Items]
Income before income taxes	$ 200,662	$ 182,472	$ 212,527
Domestic
Pre-tax Income [Line Items]
Income before income taxes	149,988	178,451	212,527
Foreign
Pre-tax Income [Line Items]
Income before income taxes	$ 50,674	$ 4,021

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration