Stock Options (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock Options [Line Items]
Award vesting rights			20% vested on the date of grant, with the balance vesting 20% per year over the next four years, except for directors whose options vest six months from the date of grant.
2004 Plan [Member]
Stock Options [Line Items]
Number of shares authorized (in shares)	2,500,000		2,500,000
2004 Plan [Member] | Incentive Stock Options [Member]
Stock Options [Line Items]
Award vesting rights			Twenty percent of the options vested immediately on the date of grant, with the balance of the options to vest in equal annual installments over the next four years on the anniversary date of the original grant.
Term of employment agreements			5 years
Number of executives affected			3
Grants in period (in shares)			890,000
Grant period			10 years
Compensation period not yet recognized	$ 2,358,000		$ 2,358,000
Compensation expense	$ 118,000	$ 118,000	$ 236,000	$ 236,000
2010 Plan [Member]
Stock Options [Line Items]
Number of shares authorized (in shares)	5,000,000		5,000,000