Goodwill and Other Intangible Asset Data - Schedule of Intangible Assets Including Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Goodwill Non Amortizable And Amortizable Intangible Assets [Line Items]
Goodwill at gross cost	$ 205,084	$ 180,731
Impairment charges	(110,142)	(101,028)
Goodwill	$ 94,942	$ 79,703

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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