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Geographic Data - Schedule of Revenue by Geographic Areas (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Long-Lived Assets      
Long-lived assets $ 71,414us-gaap_PropertyPlantAndEquipmentNet $ 74,869us-gaap_PropertyPlantAndEquipmentNet $ 93,725us-gaap_PropertyPlantAndEquipmentNet
UNITED STATES      
Long-Lived Assets      
Long-lived assets 33,048us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
36,664us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
45,957us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
CHINA      
Long-Lived Assets      
Long-lived assets 31,782us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CN
33,277us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CN
34,615us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CN
UNITED KINGDOM      
Long-Lived Assets      
Long-lived assets 1,055us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_GB
2,004us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_GB
2,669us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_GB
SINGAPORE      
Long-Lived Assets      
Long-lived assets 80us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_SG
117us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_SG
1,111us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_SG
CANADA      
Long-Lived Assets      
Long-lived assets 462us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CA
478us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CA
563us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CA
TAIWAN, PROVINCE OF CHINA      
Long-Lived Assets      
Long-lived assets 2,127us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_TW
1,775us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_TW
1,764us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_TW
THAILAND      
Long-Lived Assets      
Long-lived assets     5,839us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_TH
SWITZERLAND      
Long-Lived Assets      
Long-lived assets   19us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CH
714us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_CH
Other non-U.S. [Member]      
Long-Lived Assets      
Long-lived assets $ 2,860us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= cts_OtherNonUnitedStatesMember
$ 535us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= cts_OtherNonUnitedStatesMember
$ 493us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= cts_OtherNonUnitedStatesMember