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Debt Instrument, Fair Value Disclosure, Narrative

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Maximum Allowable Percentage Of The Product Of Last Reported Sale Price of Common Stock And Conversion Rate For Convertible Notes Payable

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- Definition

Maximum days after any five trading day period in which trading price was less than 97 percent of last reported sale price

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- Definition

Net Cost Of Convertible Note Hedge And All Capped Transactions

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Number Of Shares Of Convertible Debt Hedged And Capped Call

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Percent Of The Principal Amount Of The Convertible Notes Plus Accrued Interest To Be Purchased By The Company Subject Company Undergoing A Fundamental Change

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No definition available.

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- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Exercise price per share or per unit of warrants or rights outstanding.

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- Definition

Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock.

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The price per share of the conversion feature embedded in the debt instrument.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

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Weighted average interest rate of short-term debt outstanding.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Debt And Credit Arrangements Convertible Notes (Details) $ / shares in Units, ¥ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 CNY (¥) shares	Dec. 31, 2016 USD ($) $ / shares shares	Sep. 30, 2016 CNY (¥)
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		$ (1,836,000)
Interest accretion of convertible notes discount	$ 12,481,000	11,535,000	$ 10,662,000
Amortization of Financing Costs	1,284,000	1,290,000	1,392,000
CCESC Term Loan Maturing May 26, 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt					$ 9,604,000	¥ 66,624
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate				5.39%	5.39%
Convertible Notes, Due 2018 [Member] \| Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage				2.00%	2.00%
Debt Instrument, Interest Rate, Effective Percentage				7.90%	7.90%
Number Of Shares Of Convertible Debt Hedged And Capped Call \| shares				3,622	3,622
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares					$ 84.96
Proceeds from Issuance of Warrants	48,848,000
Net Cost Of Convertible Note Hedge And All Capped Transactions	17,638,000
Convertible Debt, Noncurrent		215,634,000			$ 228,115,000
Unamortized Debt Issuance Expense		(1,836,000)			(1,125,000)
Debt Instrument, Unamortized Discount		34,366,000			21,885,000
Interest Expense, Debt	17,481,000	16,535,000	15,662,000
Interest Expense, Debt, Excluding Amortization	5,000,000	5,000,000	5,000,000
Interest accretion of convertible notes discount	12,481,000	11,535,000	10,662,000
Debt Issuance Costs, Gross					$ 7,277,000
Amortization of Financing Costs	$ 711,000	$ 711,000	$ 711,000
Debt Instrument, Convertible, Threshold Consecutive Trading Days	20 days
Debt Instrument, Convertible, Threshold Trading Days	30
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	130.00%
Debt Instrument, Convertible, Conversion Price \| $ / shares					$ 69.03
Maximum days after any five trading day period in which trading price was less than 97 percent of last reported sale price	5 days
Convertible Notes Principal Amount Denominator For Trading Price					$ 1,000
Maximum Allowable Percentage Of The Product Of Last Reported Sale Price of Common Stock And Conversion Rate For Convertible Notes Payable				97.00%	97.00%
Percent Of The Principal Amount Of The Convertible Notes Plus Accrued Interest To Be Purchased By The Company Subject Company Undergoing A Fundamental Change				100.00%	100.00%
Debt Instrument, Fair Value Disclosure, Narrative	The fair value of the Convertible Notes was approximately 96% of their par value as of December 31, 2016 and approximately 88% of their par value as of December 31, 2015. The Convertible Notes are actively quoted instruments and, accordingly, the fair value of the Convertible Notes was determined using Level 1 inputs as defined in Note 11.
Liability Component [Member] \| Convertible Notes, Due 2018 [Member] \| Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 170,885,000
Debt Issuance Costs, Gross					4,974,000
Equity Component [Member] \| Convertible Notes, Due 2018 [Member] \| Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount					79,115,000
Debt Issuance Costs, Gross					2,303,000
Line of Credit [Member] \| HSBC CCESC Unsecured Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity
Line of Credit - Working Capital [Member] \| CCDEC Facility Maturing August 7, 2015 [Member]
Debt Instrument [Line Items]
Short-term Debt, Weighted Average Interest Rate				4.35%	4.35%
United States of America, Dollars \| CCESC Term Loan Maturing May 26, 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt					$ 9,604,000