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Debt And Credit Arrangements Scheduled Annual Maturities (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]      
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 4,903us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths    
Long-term Debt, Maturities, Repayments of Principal in Year Four 250,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour    
Long Term Debt Maturities Total Repayments Due 254,903gtls_LongTermDebtMaturitiesTotalRepaymentsDue    
Interest Paid $ 6,838us-gaap_InterestPaid $ 7,233us-gaap_InterestPaid $ 6,604us-gaap_InterestPaid