Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 H	Dec. 31, 2013	Dec. 31, 2012
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Mandatory work hours per year	1,000
Mandatory 401(k) match	$ 0.25
Maximum annual employer 401(k) contribution	6.00%
Amount expensed for 401(k) contributions	774,000	673,000	620,000
Accrued liability for plan	1,300,000	1,200,000
Increase in non-qualified deferred compensation plan	140,000	(99,000)	(330,000)
Aggregate payout under Profit Sharing Plan	1,005,000	858,000	894,000
RML
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined Contribution Plan, Age Required	21 years 6 months
Amount expensed for 401(k) contributions	12,000
Defined Contribution Plan, Term of Service Required	3 months
Supplemental Employee Retirement Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Contributions to Supplemental Executive Retirement Plan	184,000	220,000	302,000
Accrued liability for plan	2,500,000	2,500,000
Supplemental Employee Retirement Plan | RML
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Contributions to Supplemental Executive Retirement Plan	87,000
Accrued liability for plan	$ 4,400,000
Vesting period	10 years