Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings (loss) Per Common Share (Details)

v2.4.1.9
Earnings Per Share - Schedule of Calculation of Basic and Diluted Earnings (loss) Per Common Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share, Basic and Diluted [Abstract]    
Net income (loss) $ (255,095)us-gaap_NetIncomeLoss $ 11,189us-gaap_NetIncomeLoss
Less portion allocated to nonvested shares   120us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic
Net income (loss) allocated to common shares $ (255,095)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 11,069us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted average common shares outstanding 75,857us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 75,556us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Basic and diluted earnings (loss) per common share $ (3.36)us-gaap_EarningsPerShareBasicAndDiluted $ 0.15us-gaap_EarningsPerShareBasicAndDiluted
Shares excluded due to being anti-dilutive (weighted-average) 201us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount