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Equity Method Investments - Operating Results (Details) - ICP [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Net sales	$ 177,401	$ 166,905	$ 236,486
Cost of sales and expenses	(163,837)	(146,098)	(196,551)
Net income	$ 13,564	$ 20,807	$ 39,935

X

- Definition

The amount of the cost of sales reported by an equity method investment of the entity.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
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-Section 50
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- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

+ References

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The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

+ References

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