Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Deferred Charges (Details)

v3.3.1.900
Summary of Significant Accounting Policies - Deferred Charges (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accounting Policies [Abstract]      
Deferred Lease Costs Capitalized $ 7.8 $ 6.2 $ 4.0
Deferred lease costs amount related to salaries and related costs $ 6.2 $ 5.1 $ 2.9