Share-based Payment Arrangements (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Number of Shares, Outstanding at January 1, 2012	1,419,989
Number of Shares, Granted	0
Number of Shares, Exercised	0
Number of Shares, Forfeited or expired	(15,000)
Number of Shares, Outstanding at December 31, 2012	1,404,989
Number of Shares, Exercisable at December 31, 2012	1,111,418
Weighted Average Exercise Price, Outstanding at January 1, 2012	$ 9.66
Weighted Average Exercise Price, Forfeited or expired	$ 12.17
Weighted Average Exercise Price, Outstanding at December 31, 2012	$ 9.63
Weighted Average Exercise Price, Exercisable at December 31, 2012	$ 10.40
Average Remaining Contractual Term, Outstanding at December 31, 2012 (in years)	5 years 2 months 12 days
Average Remaining Contractual Term, Exercisable at December 31, 2012 (in years)	4 years 10 months 24 days
Aggregate Intrinsic Value, Outstanding at December 31, 2012	$ 1,672
Aggregate Intrinsic Value, Exercisable at December 31, 2012	$ 895