Stock-Based Compensation (Details 2) (Stock Options, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
$6.38 - $7.94
Stock-Based Compensation
Exercise price, low end of range (in dollars per share)	$ 6.38
Exercise price, high end of range (in dollars per share)	$ 7.94
Options Outstanding
Number of Shares	48
Weighted Average Remaining Contractual Life	1 year 4 months 17 days
Weighted Average Exercise Price (in dollars per share)	$ 6.40
Options Exercisable
Number of Shares	48
Weighted Average Exercise Price (in dollars per share)	$ 6.40
$10.73 - $12.90
Stock-Based Compensation
Exercise price, low end of range (in dollars per share)	$ 10.73
Exercise price, high end of range (in dollars per share)	$ 12.90
Options Outstanding
Number of Shares	447
Weighted Average Remaining Contractual Life	6 years 3 months 22 days
Weighted Average Exercise Price (in dollars per share)	$ 11.66
Options Exercisable
Number of Shares	320
Weighted Average Exercise Price (in dollars per share)	$ 11.84
$13.15 - $15.03
Stock-Based Compensation
Exercise price, low end of range (in dollars per share)	$ 13.15
Exercise price, high end of range (in dollars per share)	$ 15.03
Options Outstanding
Number of Shares	363
Weighted Average Remaining Contractual Life	7 years 4 months 24 days
Weighted Average Exercise Price (in dollars per share)	$ 13.73
Options Exercisable
Number of Shares	160
Weighted Average Exercise Price (in dollars per share)	$ 13.57
$6.38 - $15.03
Stock-Based Compensation
Exercise price, low end of range (in dollars per share)	$ 6.38
Exercise price, high end of range (in dollars per share)	$ 15.03
Options Outstanding
Number of Shares	858
Weighted Average Remaining Contractual Life	6 years 6 months
Weighted Average Exercise Price (in dollars per share)	$ 12.24
Options Exercisable
Number of Shares	528
Weighted Average Exercise Price (in dollars per share)	$ 11.88