Annual report pursuant to Section 13 and 15(d)

Net Income (Loss) per Common Share (Details)

v2.4.1.9
Net Income (Loss) per Common Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount                 49,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount    
Basic net income (loss) per common share                      
Net income (loss)                 $ 49,386us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 25,799us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 26,974us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted-average common shares outstanding                 32,027,115us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 31,595,019us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 30,796,675us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic net income (loss) per common share (in dollars per share) $ 0.33us-gaap_EarningsPerShareBasic $ 0.49us-gaap_EarningsPerShareBasic $ 0.37us-gaap_EarningsPerShareBasic $ 0.36us-gaap_EarningsPerShareBasic $ 0.30us-gaap_EarningsPerShareBasic $ 0.40us-gaap_EarningsPerShareBasic $ 0.34us-gaap_EarningsPerShareBasic $ (0.22)us-gaap_EarningsPerShareBasic $ 1.54us-gaap_EarningsPerShareBasic $ 0.82us-gaap_EarningsPerShareBasic $ 0.88us-gaap_EarningsPerShareBasic
Diluted net income (loss) per common share                      
Net income (loss)                 $ 49,386us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 25,799us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 26,974us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted-average common shares outstanding                 32,027,115us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 31,595,019us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 30,796,675us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted average shares oustanding - dilutive                 32,407,266us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 32,153,912us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 31,796,830us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted net income (loss) per common share (in dollars per share) $ 0.32us-gaap_EarningsPerShareDiluted $ 0.48us-gaap_EarningsPerShareDiluted $ 0.36us-gaap_EarningsPerShareDiluted $ 0.36us-gaap_EarningsPerShareDiluted         $ 1.52us-gaap_EarningsPerShareDiluted [1] $ 0.80us-gaap_EarningsPerShareDiluted [1] $ 0.85us-gaap_EarningsPerShareDiluted [1]
Stock Options [Member]                      
Diluted net income (loss) per common share                      
Restricted and performance stock units issued                 291,018us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
/ us-gaap_StatementClassOfStockAxis
= us-gaap_EmployeeStockOptionMember 		502,886us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
/ us-gaap_StatementClassOfStockAxis
= us-gaap_EmployeeStockOptionMember 		953,710us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
/ us-gaap_StatementClassOfStockAxis
= us-gaap_EmployeeStockOptionMember
Restricted Stock Units (RSUs) [Member]                      
Diluted net income (loss) per common share                      
Restricted and performance stock units issued                 89,133us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockUnitsRSUMember 		56,007us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockUnitsRSUMember 		46,445us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockUnitsRSUMember
Successor [Member]                      
Basic net income (loss) per common share                      
Basic net income (loss) per common share (in dollars per share)                     $ 0.88us-gaap_EarningsPerShareBasic
/ us-gaap_StatementScenarioAxis
= us-gaap_SuccessorMember
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