Income Taxes Income Tax Eff Rate Recon (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income before income taxes	$ 33,911	$ 5,003	$ 6,996
Less: Non-taxable entities income	0	0	6,365
Income before taxes of taxable entities	33,911	5,003	631
Provision for income taxes at federal statutory rate	(11,869)	(1,751)	(215)
State income taxes, net of federal benefit	(1,979)	(293)	(36)
Manufacturing deduction	1,274	225	0
Deferred tax assets upon conversion to a corporation	0	1,495	0
Tax rate change	0	100	0
State tax credits	0	0	(39)
Other	41	(22)	0
Provision for taxes	$ (12,533)	$ (246)	$ (290)
Effective tax rate	37.00%	4.90%	46.00%