Income Taxes Income Taxes Discussion (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent			31.00%	33.80%
Income tax expense	$ 8,652	$ 8,182	$ 23,716	$ 24,754
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			35.00%	35.00%
Other Tax Expense (Benefit)				$ 1,800