Income Taxes Unrecognized Benefit (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of year	$ 1,944,000	$ 1,651,000	$ 1,453,000
Prior period tax positions	0	188,000	0
Current period tax positions	492,000	269,000	318,000
Lapse of statute of limitations	(63,000)	(164,000)	(120,000)
Balance at end of year	2,373,000	1,944,000	$ 1,651,000
Lapse of statute of limitations expected to reverse in 2014	391,000
Unrecognized tax benefits that would impact effective tax rate	806,000
Unrecognized tax benefits, interest and penalties income	46,000
Income tax penalties and interest accrued	$ 531,000	$ 485,000