Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Divestitures - Summary of Proforma Financial Information for Acquisition (Details)

v2.4.1.9
Acquisitions and Divestitures - Summary of Proforma Financial Information for Acquisition (Details) (Woodside Properties, USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Woodside Properties
 
Business Acquisition [Line Items]  
Revenue $ 268,375us-gaap_BusinessAcquisitionsProFormaRevenue
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
Net income $ 14,976us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
Basic and diluted earnings per common share $ 0.20us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember