XML 16 R25.htm IDEA: XBRL DOCUMENT v2.4.1.9

COMMITMENTS AND CONTINGENCIES (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
COMMITMENTS AND CONTINGENCIES.
Rental expense under operating leases with initial terms exceeding one year	$ 357,000dwsn_OperatingLeaseRentalExpenseInitialTermExceedingOneYear	$ 242,000dwsn_OperatingLeaseRentalExpenseInitialTermExceedingOneYear
Unused letters of credit, total	$ 233,000us-gaap_LettersOfCreditOutstandingAmount

X

- Definition

Rental expense for the reporting period incurred under operating leases with initial terms exceeding one year.

+ References

No definition available.

+ Details

Name:	dwsn_OperatingLeaseRentalExpenseInitialTermExceedingOneYear
Namespace Prefix:	dwsn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant