Income Taxes (Details) (USD $)	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Prepaid federal income taxes	$ 39,700,000
Prepaid state income taxes	1,700,000	700,000
Prepaid income taxes	41,397,000	717,000
Accrued federal income taxes		$ 2,000,000

Carrying amount as of the balance sheet date of payments made in advance for income and other taxes, which will be charged against earnings within one year or the normal operating cycle, if longer.

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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Chapter 3

-Section A

-Paragraph 4

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- Definition

Carrying amount as of the balance sheet date of payments made in advance for Federal income taxes, which will be charged against earnings within one year or the normal operating cycle, if longer.

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Carrying amount as of the balance sheet date of payments made in advance for State income taxes, which will be charged against earnings within one year or the normal operating cycle, if longer.

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Carrying value as of the balance sheet date of obligations incurred and payable for federal taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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