Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Earnings Per Share (Details)

v2.4.1.9
Summary of Significant Accounting Policies - Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Accounting Policies [Abstract]                      
Net income $ 8,654us-gaap_NetIncomeLoss $ 7,291us-gaap_NetIncomeLoss $ 2,719us-gaap_NetIncomeLoss $ (8,281)us-gaap_NetIncomeLoss $ 1,574us-gaap_NetIncomeLoss $ 4,545us-gaap_NetIncomeLoss $ (1,781)us-gaap_NetIncomeLoss $ (1,924)us-gaap_NetIncomeLoss $ 10,383us-gaap_NetIncomeLoss $ 2,414us-gaap_NetIncomeLoss $ 18,360us-gaap_NetIncomeLoss
Basic weighted-average shares outstanding 46,350,835us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 46,315,968us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 46,064,049us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 45,909,995us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 45,819,906us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 45,621,552us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 45,465,529us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 45,327,237us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 46,161,846us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 45,560,078us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 44,649,275us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive securities:                      
Stock options (in shares)                 556,294us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 859,121us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 1,346,188us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Diluted weighted-average shares outstanding (in shares) 47,006,314us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 46,987,522us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 46,573,691us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 45,909,995us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 46,649,171us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 46,605,360us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 45,465,529us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 45,327,237us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 46,718,140us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 46,419,199us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 45,995,463us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Stock options excluded from calculation of dilutive shares as the effect would be anti-dilutive (in shares)                 1,737,261us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 1,856,591us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 681,688us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount