Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation Equity-Based Compensation - 401(k) Retirement Savings Plan (Details)

v3.6.0.2
Equity-Based Compensation Equity-Based Compensation - 401(k) Retirement Savings Plan (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]      
Employer 401(K) retirement savings plan contribution Amount $ 828,000 $ 742,000 $ 703,000