Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Deferred Charges (Details)

v3.6.0.2
Summary of Significant Accounting Policies - Deferred Charges (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounting Policies [Abstract]      
Deferred Lease Costs Capitalized $ 7,013 $ 7,803 $ 6,199
Deferred lease costs amount related to salaries and related costs $ 6,210 $ 6,236 $ 5,084