Stock Plans and Other Incentives (Details Textual) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended					1 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 RSU [Member] Employee	Jun. 30, 2012 RSU [Member] Employee	Jun. 30, 2013 RSU [Member] Employee	Jun. 30, 2012 RSU [Member] Employee	Jun. 30, 2013 Money option [Member]	Dec. 31, 2012 Money option [Member]	Jun. 30, 2013 Non Employee Directors Compensation Plan [Member]	Jun. 30, 2012 Non Employee Directors Compensation Plan [Member]	Jun. 30, 2013 Non Employee Directors Compensation Plan [Member]	Jun. 30, 2012 Non Employee Directors Compensation Plan [Member]	Jun. 30, 2013 Maximum [Member] RSU [Member]	Jun. 30, 2013 Minimum [Member] RSU [Member]	Jun. 30, 2012 Minimum [Member] RSU [Member]	Feb. 28, 2013 Employees [Member] RSU [Member]	Feb. 29, 2012 Employees [Member] RSU [Member]	Jun. 30, 2013 Non-employee directors [Member] RSU [Member]	Jun. 30, 2012 Non-employee directors [Member] RSU [Member]
Stock Plans and Other Incentives (Textual) [Abstract]
Expiration period of the awards granted under the company's incentive plans								10 years
Vesting period of stock awards for employees																5 years	3 years	3 years
Outstanding in-the-money options										35,448	35,448
Number of common stock delivered used to settle minimum employee withholding tax obligations						9,242	9,016	80,139	83,165
Number of employees withholding tax obligations						2	2	16	16
Employee withholding tax obligations approx amount						$ 171,000	$ 87,000	$ 1,280,000	$ 838,000
Common stock delivered, net						15,759	15,984	124,936	131,386
Closing stock price	$ 18.49		$ 18.49		$ 13.03	$ 18.49	$ 9.61	$ 18.49	$ 9.61
RSUs granted to employees								97,844	159,083										91,356	143,783	6,448	15,300
Weighted average grant date fair value																			$ 16.20	$ 10.05	$ 14.18	$ 9.01
Number of months after the termination of service, RSUs delivered to non-employee directors																					6 months
Non-cash compensation expense	547,000	609,000	1,039,143	1,166,366								46,000	61,000	92,000	130,000
Vesting Rights								RSUs vest one-third a year over three years	RSUs vest one-third a year over three years
Stock Plans and Other Incentives (Additional Textual) [Abstract]
Liability for option cancellations amount	490,000		490,000		297,000
Recorded compensation expense	$ 105,000	$ 37,000	$ 194,000	$ 26,000