Stock Option Plans and Restricted Stock Grants (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2011 Y	Dec. 31, 2010 Y	Dec. 31, 2009
Option activity under the Company's stock option plans
Outstanding, Number of Stock Options, Beginning Balance	2,949,000
Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 10.42
Outstanding, Weighted Average Remaining Contractual Term, Beginning Balance	0
Outstanding, Aggregate Intrinsic Value, Beginning Balance	$ 0
Stock options granted	31,000	397,000	936,000
Granted, Weighted Average Exercise Price	$ 8.91
Granted, Aggregate Intrinsic Value	0
Outstanding, Weighted Average Remaining Contractual Term	0
Exercise of stock options, Shares	(9,000)
Exercised, Weighted Average Exercise Price	$ 6.66
Exercised, Weighted Average Remaining Contractual Term	0
Intrinsic value of options exercised	20,000	1,200,000	147,000
Forfeited or expired, Number of Stock Options	(106,000)
Forfeited or expired, Weighted Average Exercise Price	$ 10.45
Forfeited or expired, Weighted Average Remaining Contractual Term	0
Forfeited or expired, Aggregate Intrinsic Value	0
Outstanding, Number of Stock Options, Ending Balance	2,865,000	2,949,000
Outstanding, Weighted Average Exercise Price, Ending Balance	$ 10.41	$ 10.42
Outstanding, Weighted Average Remaining Contractual Term, Ending Balance	5.40	0
Outstanding, Aggregate Intrinsic Value, Ending Balance	2,284,000	0
Numbers of common shares convertible to options outstanding	2,711,000
Vested or expected to vest, Weighted Average Exercise Price	$ 10.51
Vested or expected to vest, Weighted Average Remaining Contractual Term	5.26
Vested or expected to vest, Aggregate Intrinsic Value	2,067,000
Number of common shares for which options are exercisable	1,921,000
Exercisable, Weighted Average Exercise Price	$ 11.27
Exercisable, Weighted Average Remaining Contractual Term	4.16
Exercisable, Aggregate Intrinsic Value	$ 989,000