Consolidated Statements Of Stockholders' Equity (Parenthetical) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Options exercised and awards vested in shares	299,635	133,680	383,222

Share Based Compensation Arrangement by Share Based Payment Award Options Exercised and Vested

No definition available.

Name:	drq_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedAndVested
Namespace Prefix:	drq_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration