Profit-Sharing 401(k) Plan (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Compensation and Retirement Disclosure [Abstract]
Service requirement for eligibility in the plan	1 month
Defined Contribution Plan, Minimum Annual Contribution By Employee, Percent	1.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	15.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount Accrued	$ 383,000
Employer's discretionary annual contribution to the plan		$ 397,000	$ 693,000
Ratable vesting period for employer's contributuions to the plan	6 years

Defined Contribution Plan, Employer Discretionary Contribution Amount Accrued

No definition available.

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Defined Contribution Plan, Employers Matching Contribution, Vesting Period

No definition available.

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Defined Contribution Plan, Minimum Annual Contribution By, Percent of Annual Compensation

No definition available.

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Profit-Sharing and Deferred Compensation Plan, Eligibility Service Period

No definition available.

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Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

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Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

No definition available.

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