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Supplemental Cash Flow Information - Additional Information Relating to Cash Flow Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash payments (refunds) for:
Income taxes, net	$ (1,141)	$ 1,009
Noncash continuing investing and financing activities:
Accounts payable associated with additions of property, plant and equipment	14,609	14,968
Incentive tax credit receivable associated with property, plant and equipment		8,125
Series E Redeemable Preferred Stock [Member]
Noncash continuing investing and financing activities:
Dividends accrued on redeemable preferred	19,748	17,248
Accretion of redeemable preferred	$ 2,882	$ 4,852

X

- Definition

Noncash portion of accretion of redeemable preferred stock.

+ References

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- Definition

Cash payments for.

+ References

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- Definition

The amount of a noncash incentive tax credit receivable associated with property plant and equipment.

+ References

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- Definition

Future cash outflow to pay for purchases of fixed assets that have occurred.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

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-Topic 230
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-Topic 230
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-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

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-Topic 230
-SubTopic 10
-Section 50
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- Definition

Accretion of temporary equity during the period due to cash, stock, and in-kind dividends. This item is an adjustment to net income necessary to derive net income apportioned to common stockholders and is to be distinguished from Temporary Equity, Accretion of Dividends (Temporary Equity, Accretion of Dividends).

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