Income Taxes (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Taxes (Additional Textual) [Abstract]
Effective tax rate				0.90%	(56.50%)
Income tax expense, benefit	$ 86,000	$ 62,000		$ 182,000	$ (2,586,000)
Effective tax rate excluding impact from aforementioned one-time benefit				0.90%	3.00%
Income tax benefit related to favorable resolution of uncertain tax positions			$ 2,600,000
Maximum [Member] | Federal and Certain State Tax Jurisdictions [Member]
Income Taxes (Textual) [Abstract]
Years subject to income tax examination				2012
Minimum [Member] | Federal and Certain State Tax Jurisdictions [Member]
Income Taxes (Textual) [Abstract]
Years subject to income tax examination				2008