Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Earnings Per Share Computations (Detail)

v2.4.1.9
Earnings Per Share - Earnings Per Share Computations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 27, 2014
Jun. 28, 2014
Mar. 29, 2014
Dec. 31, 2013
Sep. 28, 2013
Jun. 30, 2013
Mar. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]                      
Net Income $ 18,439us-gaap_NetIncomeLoss $ 17,080us-gaap_NetIncomeLoss $ 13,144us-gaap_NetIncomeLoss $ 7,507us-gaap_NetIncomeLoss $ 6,389us-gaap_NetIncomeLoss $ 7,155us-gaap_NetIncomeLoss $ 5,158us-gaap_NetIncomeLoss $ 8,564us-gaap_NetIncomeLoss $ 56,170us-gaap_NetIncomeLoss $ 27,266us-gaap_NetIncomeLoss $ 21,874us-gaap_NetIncomeLoss
Basic Earnings Weighted Average Shares                 21,713us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 20,981us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 20,572us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Net Effect of Dilutive Stock Options                 949us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 1,050us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 1,217us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Diluted Earnings Weighted Average Shares                 22,662us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 22,031us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 21,789us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic Earnings Per Share $ 0.84us-gaap_EarningsPerShareBasic $ 0.79us-gaap_EarningsPerShareBasic $ 0.61us-gaap_EarningsPerShareBasic $ 0.35us-gaap_EarningsPerShareBasic $ 0.30us-gaap_EarningsPerShareBasic $ 0.34us-gaap_EarningsPerShareBasic $ 0.25us-gaap_EarningsPerShareBasic $ 0.41us-gaap_EarningsPerShareBasic $ 2.59us-gaap_EarningsPerShareBasic $ 1.30us-gaap_EarningsPerShareBasic $ 1.06us-gaap_EarningsPerShareBasic
Diluted Earnings Per Share $ 0.81us-gaap_EarningsPerShareDiluted $ 0.75us-gaap_EarningsPerShareDiluted $ 0.58us-gaap_EarningsPerShareDiluted $ 0.33us-gaap_EarningsPerShareDiluted $ 0.29us-gaap_EarningsPerShareDiluted $ 0.32us-gaap_EarningsPerShareDiluted $ 0.24us-gaap_EarningsPerShareDiluted $ 0.39us-gaap_EarningsPerShareDiluted $ 2.48us-gaap_EarningsPerShareDiluted $ 1.24us-gaap_EarningsPerShareDiluted $ 1.00us-gaap_EarningsPerShareDiluted