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Employee Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Contribution Plan [Line Items]      
Percentage of matching cash contributions     50.00%
Percentage of maximum contributions     5.00%
Company's vested contribution description on one year of service     20.00%
Company's vested contribution description after five years of service     100.00%
Company's total contributions $ 3.2 $ 3.5 $ 3.3
Compensation expenses $ 0.7 $ 0.5 $ 0.6
401(k) [Member]      
Defined Contribution Plan [Line Items]      
Percentage of contributions by participants     75.00%
Non Qualified Savings Plan [Member]      
Defined Contribution Plan [Line Items]      
Percentage of contributions by participants     100.00%