Annual report pursuant to Section 13 and 15(d)

Employee Retirement Plans - Defined Contribution and Nonqualified Plans(Details)

v3.3.1.900
Employee Retirement Plans - Defined Contribution and Nonqualified Plans(Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined contribution plan      
Company's matching contributions $ 377 $ 255 $ 213
Non-discretionary employer contributions 1,264 1,021 $ 807
Non-qualified plan      
Defined contribution plan      
Expense 496 509  
Amount accrued 2,482 $ 1,708  
Henderson Defined Contribution Plan [Member]      
Defined contribution plan      
Company's matching contributions $ 299