Income Taxes	6 Months Ended
Jun. 30, 2011
Income Taxes [Abstract]
Income Tax Disclosure [Text Block]	5. INCOME TAXES: During the quarter ended June 30, 2011, the Company recorded an income tax provision of $57.7 million, or 35.8% of income before income tax provision. This compares to an income tax provision of $34.1 million, or 35.7% of income before income tax provision for the quarter ended June 30, 2010. The effective tax rate increased over the comparable prior period primarily due to elevated activity levels in the higher state tax jurisdiction of Pennsylvania which increased the overall effective tax rate to 35.9%. During the six months ended June 30, 2011, the Company recorded an income tax provision of $101.7 million, or 37.1% of income before income tax provision. This compares to an income tax provision of $150.4 million, or 36.3% of income before income tax provision for the six months ended June 30, 2010. The effective tax rate increased over the comparable prior period primarily due to elevated activity levels in the higher state tax jurisdiction of Pennsylvania as the higher effective tax rate is now being applied to the Company's prior temporary differences which increased the overall effective tax rate to 35.9%.

Description containing the entire income tax disclosure. Examples include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49

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