Stock-Based Compensation (Details Textual) (USD $)	1 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended	1 Months Ended		3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended							3 Months Ended	6 Months Ended			1 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended	12 Months Ended
	Feb. 29, 2012	Mar. 31, 2011	Feb. 28, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2010	Feb. 29, 2012 Employee Stock Purchase Plan [Member]	Feb. 28, 2011 Employee Stock Purchase Plan [Member]	Jun. 30, 2012 Restricted Stock [Member]	Jun. 30, 2011 Restricted Stock [Member]	Jun. 30, 2012 Restricted Stock [Member]	Jun. 30, 2011 Restricted Stock [Member]	Dec. 31, 2011 Restricted Stock [Member]	Jun. 30, 2012 Stock Options [Member]	Jun. 30, 2011 Stock Options [Member]	Jun. 30, 2012 Stock Options [Member]	Jun. 30, 2011 Stock Options [Member]	Jun. 30, 2012 Time-Based Restricted Stock Units [Member]	Jun. 30, 2011 Time-Based Restricted Stock Units [Member]	Jun. 30, 2012 Performance Units [Member]	Dec. 31, 2011 Performance Units [Member]	Jun. 30, 2011 Performance Units [Member]	Jun. 30, 2012 Restricted Stock Units [Member]	Jun. 30, 2012 Restricted Stock Units [Member]	Jun. 30, 2011 Restricted Stock Units [Member]	Dec. 31, 2011 Restricted Stock Units [Member]	Feb. 29, 2012 Short Term Bonus Incentive Plan [Member]	Mar. 31, 2011 Short Term Bonus Incentive Plan [Member]	Jun. 30, 2012 Employee Withholding Taxes on Stock Awards [Member]	Jun. 30, 2011 Employee Withholding Taxes on Stock Awards [Member]	Aug. 31, 2010 Stock Repurchases [Member]	Jun. 30, 2012 Stock Repurchases [Member]	Dec. 31, 2011 Stock Repurchases [Member]
Stock Based Compensation (Additional Textual) [Abstract]
Share-based expense				$ 900,000	$ 1,000,000	$ 39,000	$ 60,000				$ 800,000	$ 900,000	$ 1,500,000	$ 1,600,000		$ 100,000	$ 100,000	$ 100,000	$ 100,000			$ 100,000		$ 100,000	$ 0
Grants vesting period													4 years													4 years
Restricted stock awards cancellation											46,668	17,100	52,656	22,425								(11,320)		(35,083)
Grant date fair value of restricted stock canceled											300,000	100,000	400,000	100,000								79,000		400,000
Restricted stock awards issued						229,950							229,950	154,750						5,000	4,400	169,650				4,000
Shares, other than options, vested											14,025	14,525	466,255	396,221							0	4,836		30,037		2,600	1,500
Grant date fair value of restricted stock vested							290,000				100,000	100,000	2,700,000	2,500,000								33,000	2,900,000			16,000	9,000
Restricted shares vested grant date intrinsic value											100,000	100,000	3,500,000	2,900,000								36,000		225,000		20,000	11,000
Unrecognized compensation expense											5,500,000		5,500,000			32,000		32,000				0			100,000	100,000
Weighted average period											1 year 4 months 24 days					1 year 3 months										1 year 7 months 6 days
Employee stock options vesting provisions, description																		25% vest one year from the date of grant and thereafter in monthly increments over the remaining three years
Percent of options vested																		25.00%
Period of options vested																		1 year
Options vested in remaining period																		3 years
Period of termination of employment																		90 days
Options granted						4,500										4,500	200	4,500	4,000		0
Weighted Average Exercise Price Granted																$ 2.77	$ 3.20	$ 2.77	$ 3.15
Proceeds from options exercised																25,000	18,000	25,000	18,000
Option exercised						(3,719)										3,719	2,500	3,719	2,500
Intrinsic value																3,000	1,000	3,000	1,000
Options Outstanding Expired or Cancelled						(216,350)										96,802	5,360	216,350	74,560
Stock awards cancellation											972,485		972,485		1,122,296							147,250	132,906		12,550	12,550		10,150
Performance share units converted to restricted stock awards													(139,150)									(139,150)		102,941
Options issued									48,032	54,751
Fair value of options issued																				35,000	28,000
Percentage of bonus in cash																													100.00%	50.00%
Percentage of common stock issued to executives as bonus		50.00%																											0.00%
Percentage of bonus in cash to non-executives																													100.00%	100.00%
Share issued for payment of withholding tax																														48,345
Payment of withholding taxes related to stock awards																															1,200,000	1,200,000
Authorized repurchase of shares																																	5,000,000
Repurchase of shares																																		0	405,628
Repurchase of shares, Amount																																			2,600,000
Additional repurchase of shares																																		0
Stock Based Compensation (Textual) [Abstract]
Stock options granted period						10 years		7 years
Lower Range of Exercise Prices						$ 5.50
Upper Range of Exercise Prices						$ 11.84
Intrinsic value based on share price				$ 6.47		$ 6.47
Percentage of fair market value to determine purchase price						85.00%
Proceeds of from issuance of shares under ESPP	$ 300,000		$ 300,000
Rate of discount on fair market value of common stock under ESPP						15.00%
Dividend per share to be declared				$ 0.03		$ 0.03