Income Taxes	3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company’s effective tax rate for the three months ended March 31, 2013 was 22% and differed from the federal statutory rate of 35% primarily due to state and local income taxes, stock-based compensation, research and development tax credits, and limitations on officers' compensation. In January 2013, the American Taxpayer Relief Act of 2012 was signed into law, reinstating the research and development tax credit retroactively from January 1, 2012 to December 31, 2013. As a result, in the first quarter of 2013 the Company recognized as a favorable discrete item a research and development tax credit of $1.2 million related to 2012. Research and development tax credits generated in 2013 are being recognized pro rata as a component of the overall 2013 effective tax rate. The Company’s effective tax rate for the three months ended March 31, 2012 was 39% and differed from the federal statutory rate of 35% primarily due to state and local income taxes, stock-based compensation, and benefit associated with domestic production activities deduction. The Company had approximately $2.9 million of gross unrecognized tax benefits as of December 31, 2012. For the three months ended March 31, 2013, there was no change relating to the Company’s tax positions. During the first quarter of 2013, the Company was informed by the Internal Revenue Service ("IRS") that the examination of its 2010 Federal income tax return was completed, and no adjustment to the tax return was proposed by the IRS.

Income Taxes

3 Months Ended

Mar. 31, 2013

The Company’s effective tax rate for the three months ended March 31, 2013 was 22% and differed from the federal statutory rate of 35% primarily due to state and local income taxes, stock-based compensation, research and development tax credits, and limitations on officers' compensation.

In January 2013, the American Taxpayer Relief Act of 2012 was signed into law, reinstating the research and development tax credit retroactively from January 1, 2012 to December 31, 2013. As a result, in the first quarter of 2013 the Company recognized as a favorable discrete item a research and development tax credit of $1.2 million related to 2012. Research and development tax credits generated in 2013 are being recognized pro rata as a component of the overall 2013 effective tax rate.

The Company’s effective tax rate for the three months ended March 31, 2012 was 39% and differed from the federal statutory rate of 35% primarily due to state and local income taxes, stock-based compensation, and benefit associated with domestic production activities deduction.

The Company had approximately $2.9 million of gross unrecognized tax benefits as of December 31, 2012. For the three months ended March 31, 2013, there was no change relating to the Company’s tax positions. During the first quarter of 2013, the Company was informed by the Internal Revenue Service ("IRS") that the examination of its 2010 Federal income tax return was completed, and no adjustment to the tax return was proposed by the IRS.