10. Employee Retirement and Benefit Plans	12 Months Ended
Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Retirement and Benefit Plans	We sponsor a defined contribution 401(k) plan for all employees. Each participant may contribute certain amounts of eligible compensation. We make a matching contribution to the plan. Our contributions under this plan were $720,000, $667,000 and $645,000 in 2017, 2016 and 2015, respectively. The Company adopted a Nonqualified Deferred Compensation Plan effective September 1, 2017, for certain key management or highly-compensated employees. The plan allows for the deferral of salary and bonus compensation until retirement or other specified payment events occur. Employees’ deferred compensation amounts are deemed to be invested in certain investment funds, indexes or vehicles selected by our Compensation Committee and designated by each participant and their deferral balances are adjusted for earnings based upon the performance of these deemed investments. Our deferred compensation obligation under the plan at December 31, 2017 was $426,000 and is reflected in “Other Liabilities and Deferred Credits” in the accompanying Consolidated Balance Sheets.

10. Employee Retirement and Benefit Plans

12 Months Ended

Dec. 31, 2017

We sponsor a defined contribution 401(k) plan for all employees. Each participant may contribute certain amounts of eligible compensation. We make a matching contribution to the plan. Our contributions under this plan were $720,000, $667,000 and $645,000 in 2017, 2016 and 2015, respectively.

The Company adopted a Nonqualified Deferred Compensation Plan effective September 1, 2017, for certain key management or highly-compensated employees. The plan allows for the deferral of salary and bonus compensation until retirement or other specified payment events occur. Employees’ deferred compensation amounts are deemed to be invested in certain investment funds, indexes or vehicles selected by our Compensation Committee and designated by each participant and their deferral balances are adjusted for earnings based upon the performance of these deemed investments. Our deferred compensation obligation under the plan at December 31, 2017 was $426,000 and is reflected in “Other Liabilities and Deferred Credits” in the accompanying Consolidated Balance Sheets.