Employee Benefit Plans Profit Sharing Plan (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Profit Sharing Plan [Line Items]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	17.50%
Defined Contribution Plan, Empoyer Matching Contribution, Amount	$ 155	$ 151

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.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration