Tax Expense Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 14,671	$ 22,545	$ 12,070
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	1,023	1,660	1,140
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount	0	(350)	(47)
Effective Income Tax Rate Reconciliation, Tax Settlement, Other, Amount	42	0	699
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	(693)	0	0
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(541)	(458)	283
Income Tax Expense (Benefit)	$ 14,502	$ 23,397	$ 14,145