General - General (Details)	12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]
Revenue major segments percentage	48.00%

Entity Wide Revenue Major Business Segment Percentage

No definition available.

Name:	stc_EntityWideRevenueMajorBusinessSegmentPercentage
Namespace Prefix:	stc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration