XML 17 R46.htm IDEA: XBRL DOCUMENT v2.4.1.9
Incentive Plan (Narrative) (Details) (USD $)
1 Months Ended 3 Months Ended 15 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 18, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share Based Compensation Expenses   $ 4,000,000us-gaap_AllocatedShareBasedCompensationExpense $ 3,400,000us-gaap_AllocatedShareBasedCompensationExpense    
Tax benefit   1,400,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense 799,000us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense    
Unrecognized compensation related to non-vested share-based compensation arrangements 25,500,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized 25,500,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized   25,500,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized  
Weighted-average period over which unrecognized compensation cost related to non-vested share-based compensation arrangements is expected to be recognized, in years   2 years 6 months      
Total fair value of share-based awards vested   4,800,000bas_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndRestrictedStockVestedInPeriodFairValue 20,300,000bas_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndRestrictedStockVestedInPeriodFairValue    
Excess tax benefit due to carryforward loss   0bas_ExcessTaxExpenseBenefitDueToCarryforwardLoss 0bas_ExcessTaxExpenseBenefitDueToCarryforwardLoss 0bas_ExcessTaxExpenseBenefitDueToCarryforwardLoss  
Vesting periods 3 years        
Total intrinsic value of options exercised   37,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue 1,400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue    
Cash received from option exercises   727,000us-gaap_ProceedsFromStockOptionsExercised 4,441,000us-gaap_ProceedsFromStockOptionsExercised    
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Excess tax benefit if there was no net operating loss carry forwards   0bas_ExcessTaxBenefitIfThereWasNoNetOperatingLossCarryforwards
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
265,000bas_ExcessTaxBenefitIfThereWasNoNetOperatingLossCarryforwards
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Options expiration period, (in years)   10 years      
Cash received from option exercises   724,000us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
4,100,000us-gaap_ProceedsFromStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Stock Options | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting periods   3 years      
Stock Options | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting periods   5 years      
Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Excess tax benefit if there was no net operating loss carry forwards   $ 0bas_ExcessTaxBenefitIfThereWasNoNetOperatingLossCarryforwards
/ us-gaap_AwardTypeAxis
= bas_RestrictedStockAwardsMember
$ 4,200,000bas_ExcessTaxBenefitIfThereWasNoNetOperatingLossCarryforwards
/ us-gaap_AwardTypeAxis
= bas_RestrictedStockAwardsMember
   
Phantom Stock Awards [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Target number of shares to be issued         704,089bas_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetNumberOfSharesToBeIssued
/ us-gaap_AwardTypeAxis
= bas_PhantomStockAwardsMember
Percentage of target number of performance-based awards will be earned   100.00%bas_PercentageOfTargetNumberOfPerformanceBasedAwardsWillBeEarned
/ us-gaap_AwardTypeAxis
= bas_PhantomStockAwardsMember
     
Shares issued   654,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_AwardTypeAxis
= bas_PhantomStockAwardsMember
     
Phantom Stock Awards [Member] | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of target number of shares to be issued   0.00%bas_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfTargetNumberOfSharesToBeIssued
/ us-gaap_AwardTypeAxis
= bas_PhantomStockAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Phantom Stock Awards [Member] | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percentage of target number of shares to be issued   150.00%bas_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfTargetNumberOfSharesToBeIssued
/ us-gaap_AwardTypeAxis
= bas_PhantomStockAwardsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember