Employee Benefit Plans (Change on Benefit Obligations and Plan Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Change in benefit obligation:
Benefit Obligation, beginning of year	$ 0
Service Cost	1,749
Interest Cost	267
Actuarial Loss	992
Benefits Paid	(56)
Acquisition of Alkali Business	19,578
Benefit Obligation, end of year	22,530
Change in plan assets:
Fair Value of Plan Assets, beginning of year	0
Actual Return on Plan Assets	647
Employer Contributions	2,250
Benefits Paid	(56)
Acquisition of Alkali Business	10,465
Fair Value of Plan assets, end of year	13,306
Funded Status at end of period	(9,224)
Amounts recognized in the Statement of Financial Position
Non-current assets	0
Current liabilities	0
Non-current Liabilities	(9,224)
Net Asset (Liability) at end of year	(9,224)
Amounts recognized in accumulated other comprehensive loss:
Net actuarial loss	604
Amounts recognized in accumulated other comprehensive loss:	$ 604