Stock-Based Compensation Plans (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012
$4.92 - $4.92
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 4.92
Exercise price, upper range limit (in dollars per share)	$ 4.92
Options Outstanding
Number Outstanding (in shares)	3,850
Weighted Average Remaining Contractual Life	4 months 28 days
Weighted Average Exercise Price (in dollars per share)	$ 4.92
Options Exercisable
Number Exercisable (in shares)	3,850
Weighted Average Exercise Price (in dollars per share)	$ 4.92
$5.01 - $5.01
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 5.01
Exercise price, upper range limit (in dollars per share)	$ 5.01
Options Outstanding
Number Outstanding (in shares)	18,875
Weighted Average Remaining Contractual Life	2 months 1 day
Weighted Average Exercise Price (in dollars per share)	$ 5.01
Options Exercisable
Number Exercisable (in shares)	18,875
Weighted Average Exercise Price (in dollars per share)	$ 5.01
$8.40 - $8.40
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 8.40
Exercise price, upper range limit (in dollars per share)	$ 8.40
Options Outstanding
Number Outstanding (in shares)	3,921
Weighted Average Remaining Contractual Life	2 years 4 months 17 days
Weighted Average Exercise Price (in dollars per share)	$ 8.40
Options Exercisable
Number Exercisable (in shares)	3,921
Weighted Average Exercise Price (in dollars per share)	$ 8.40
$8.49 - $8.49
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 8.49
Exercise price, upper range limit (in dollars per share)	$ 8.49
Options Outstanding
Number Outstanding (in shares)	3,890
Weighted Average Remaining Contractual Life	1 year 4 months 24 days
Weighted Average Exercise Price (in dollars per share)	$ 8.49
Options Exercisable
Number Exercisable (in shares)	3,890
Weighted Average Exercise Price (in dollars per share)	$ 8.49
$8.70 - $8.70
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 8.70
Exercise price, upper range limit (in dollars per share)	$ 8.70
Options Outstanding
Number Outstanding (in shares)	4,281
Weighted Average Remaining Contractual Life	3 years 4 months 24 days
Weighted Average Exercise Price (in dollars per share)	$ 8.70
Options Exercisable
Number Exercisable (in shares)	4,281
Weighted Average Exercise Price (in dollars per share)	$ 8.70
$9.20 - $9.20
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 9.20
Exercise price, upper range limit (in dollars per share)	$ 9.20
Options Outstanding
Number Outstanding (in shares)	91,516
Weighted Average Remaining Contractual Life	2 years 7 months 2 days
Weighted Average Exercise Price (in dollars per share)	$ 9.20
Options Exercisable
Number Exercisable (in shares)	91,516
Weighted Average Exercise Price (in dollars per share)	$ 9.20
$11.24 - $11.24
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 11.24
Exercise price, upper range limit (in dollars per share)	$ 11.24
Options Outstanding
Number Outstanding (in shares)	10,595
Weighted Average Remaining Contractual Life	3 years 3 months
Weighted Average Exercise Price (in dollars per share)	$ 11.24
Options Exercisable
Number Exercisable (in shares)	10,595
Weighted Average Exercise Price (in dollars per share)	$ 11.24
$4.50 - $11.24
Outstanding and exercisable options
Exercise price, lower range limit (in dollars per share)	$ 4.50
Exercise price, upper range limit (in dollars per share)	$ 11.24
Options Outstanding
Number Outstanding (in shares)	136,928
Weighted Average Remaining Contractual Life	2 years 2 months 23 days
Weighted Average Exercise Price (in dollars per share)	$ 8.60
Options Exercisable
Number Exercisable (in shares)	136,928
Weighted Average Exercise Price (in dollars per share)	$ 8.60