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Income Taxes (Narrative) (Detail) (USD $)	12 Months Ended
Income Taxes (Narrative) (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Reconciliation Of Statutory Federal Tax Rate [Line Items]
Tax receivable, federal and state income taxes	$ 7,830,000	$ 21,580,000
Income tax rate reconciliation, federal statutory income tax rate		35.00%
Retained earnings of prior period	$ 21,864,000	$ 21,864,000

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

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