Date the bonds first became available, in CCYY-MM-DD format

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Amount of short-term debt and current maturity of long-term debt due within one year or the normal operating cycle, if longer, net of debt issuance costs

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Amount of unamortized debt issuance costs, current portion, net

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Amount of unamortized debt issuance costs, noncurrent portion

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Weighted average interest rate of debt outstanding, net of currency swap contract.

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The amount of additional borrowing capacity under a line of credit that is available as of the balance sheet date.

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The amount of additional margin spread added to the Federal Funds interest rate on borrowings denominated in U.S. dollars.

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Amount of additional margin spread added to the LIBOR one month interest rate on borrowings denominated in U.S. dollars.

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The maximum fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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The maximum amount of additional margin spread added to LIBOR one month interest rate on borrowings denominated in U.S. dollars.

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The minimum fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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The minimum amount of additional margin spread added to the LIBOR one month interest rate on borrowings denominated in U.S. dollars.

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The minimum LIBOR one month interest rate on borrowings denominated in US dollars

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The minimum LIBOR one month interest rate on eurocurrency borrowings.

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Maximum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths).

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Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths).

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Date the registration rights agreement became effective, in CCYY-MM-DD format

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Period of time between entrance into the Registration Rights Agreement and the maximum amount of time for which the Company will not owe additional interest if it satisfies its obligations under the Agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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

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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Weighted average interest rate of debt outstanding.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of the fee for available but unused credit capacity under the credit facility.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Date the credit facility first became available, in CCYY-MM-DD format.

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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 of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Debt (Details 1) - USD ($) $ in Thousands	6 Months Ended
Debt (Details 1) - USD ($) $ in Thousands	Jun. 30, 2017	Apr. 18, 2017	Apr. 04, 2017	Dec. 31, 2016
Debt Instrument
Registration Rights Agreement, Effective Date	Apr. 18, 2017
Registration Rights Agreement Term	360 days
Long-term Debt
Total Debt	$ 418,438			$ 36,194
Less: Unamortized Debt Issuance Costs	(7,415)			0
Less: Current Maturities of Capital Lease Obligations	(402)			0
Long-Term Portion	405,716			32,735
Current Maturities of Long-Term Debt	5,307			3,459
Letters of Credit Outstanding	4,645
Commitment fees on unused line of credit	$ 200
Weighted average interest rate	4.87%
Debt, Weighted Average Interest Rate, net of Currency Swap Contract	4.20%
Senior Notes due 2025
Debt Instrument
Debt Instrument, Interest Rate, Stated Percentage	5.625%
Bonds, Initiation Date	Apr. 18, 2017
Debt Instrument, Face Amount		$ 300,000
Debt Instrument, Maturity Date	May 01, 2025
Long-term Debt
Total Debt	$ 300,000			0
Term Loan Facility
Debt Instrument
Outstanding Borrowings	97,750
Long-term Debt
Less: Current Maturities of Credit Facility Borrowings, Net of Debt Issuance Costs	(4,905)			(3,459)
Current Maturities of Long-Term Debt	5,000
Unamortized Debt Issuance Costs, Current Portion	95
Revolving Facility
Debt Instrument
Outstanding Borrowings	20,000
Capital lease obligations
Long-term Debt
Total Debt	$ 688			51
JPMorgan, 2017 Credit Agreement
Debt Instrument
Line of Credit Facility, Initiation Date	Apr. 04, 2017
Line of Credit Facility, Expiration Date	Apr. 04, 2022
Line Of Credit Facility, Interest rate margin spread added to Federal Funds Rate on US Dollar borrowings	0.50%
Line Of Credit Facility, Minimum LIBOR one month interest rate on borrowings denominated in US dollars	0.00%
Line Of Credit Facility, Interest rate margin spread added to LIBOR rate on US Dollar borrowings	1.00%
Line Of Credit Facility, Minimum LIBOR one month interest rate on eurocurrency borrowings	0.00%
Long-term Debt
Total Debt	$ 117,750
JPMorgan, 2017 Credit Agreement \| Term Loan Facility
Debt Instrument
Line of Credit Facility, Current Borrowing Capacity	$ 400,000
Line Of Credit Facility, Minimum interest rate margin spread added to LIBOR rate on US Dollar borrowings	0.25%
Line Of Credit Facility, Maximum interest rate margin spread added to LIBOR rate on US Dollar borrowings	1.25%
Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	1.25%
Maximum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	2.25%
Debt Instrument, Face Amount		$ 300,000
JPMorgan, 2017 Credit Agreement \| Revolving Facility
Debt Instrument
Line of Credit Facility, Current Borrowing Capacity	$ 200,000
Line Of Credit Facility, Additional Borrowing Capacity Available	$ 150,000
Line Of Credit Facility, Minimum commitment fee percentage	0.175%
Line Of Credit Facility, Maximum commitment fee percentage	0.35%
Line Of Credit Facility, Minimum interest rate margin spread added to LIBOR rate on US Dollar borrowings	0.075%
Line Of Credit Facility, Maximum interest rate margin spread added to LIBOR rate on US Dollar borrowings	0.90%
Minimum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	1.075%
Maximum interest rate spread added to adjusted LIBOR rate based on leverage ratio on Eurocurrency borrowings (in hundreths)	1.90%
JPMorgan, Previous Credit Agreement
Debt Instrument
Outstanding Borrowings			$ 45,000
Long-term Debt
Total Debt				$ 36,143
Prudential Investment Management, Inc.
Long-term Debt
Repayments of Long-term Debt	$ 11,143
HSBC Bank (China) Company Limited, Shanghai Branch
Debt Instrument
Outstanding Borrowings	0
Long-term Debt
Maximum borrowing capacity	$ 5,000