Benefit Plans (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Contribution Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Company contribution of specific percentage of employee compensation contributed     50.00%
Company contribution of specific percentage of employee compensation contributed 100.00% 100.00%  
Percent of contribution eligible for match 4.00% 4.00% 6.00%
Employer contributions vesting percentage after required years of service 100.00% 100.00% 100.00%
Years of service for employee contributions to fully vest 0 years 0 years 0 years
Years of service for employer contributions to fully vest 0 years 0 years 3 years
Expense for the 401(k) savings and investment plan $ 398 $ 366 $ 237
Post Retirement Split Dollar Life Insurance Benefit [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Post retirement split-dollar life insurance benefit net (income) expense 15 7 (1)
Post retirement split-dollar life insurance benefit expense, accrued liability 257 242  
Supplemental Employee Retirement Plans, Defined Benefit [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Expense for Supplemental Benefit Plans 242 239 296
Accrued liability for supplemental retirement plans $ 3,901 $ 3,714