Income Taxes (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Uncertain income tax positions
Decrease in liability for uncertain tax positions		$ 1,241,000	$ 2,028,000
Interest expense recorded			125,000
Interest expense reversed		122,000	878,000
Changes in uncertain income tax positions
Uncertain income tax positions at beginning of year		1,241,000	3,269,000
Decreases as a result of lapse of statute of limitations		(1,241,000)	(2,028,000)
Uncertain income tax positions at end of year			1,241,000
Federal
Operating loss carryforwards
Net operating loss carryforwards	1,937,000
State
Operating loss carryforwards
Net operating loss carryforwards	264,040,000
(Decrease) increase in valuation allowances	$ (24,000)	$ 1,777,000	$ 973,000