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Quarterly Financial Data (Schedule of Quarterly Data) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Net sales | $ 191,600 us-gaap_Revenues | $ 179,900 us-gaap_Revenues | $ 193,500 us-gaap_Revenues | $ 180,300 us-gaap_Revenues | $ 189,600 us-gaap_Revenues | $ 183,100 us-gaap_Revenues | $ 198,000 us-gaap_Revenues | $ 186,700 us-gaap_Revenues | $ 194,300 us-gaap_Revenues | $ 194,600 us-gaap_Revenues | $ 191,900 us-gaap_Revenues | $ 180,100 us-gaap_Revenues | $ 745,345 us-gaap_Revenues | $ 757,414 us-gaap_Revenues | $ 760,941 us-gaap_Revenues |
Gross profit | 72,900 us-gaap_GrossProfit | 68,600 us-gaap_GrossProfit | 75,300 us-gaap_GrossProfit | 74,800 us-gaap_GrossProfit | 72,400 us-gaap_GrossProfit | 68,000 us-gaap_GrossProfit | 77,400 us-gaap_GrossProfit | 72,800 us-gaap_GrossProfit | 79,000 us-gaap_GrossProfit | 79,700 us-gaap_GrossProfit | 78,500 us-gaap_GrossProfit | 68,300 us-gaap_GrossProfit | 291,635 us-gaap_GrossProfit | 290,554 us-gaap_GrossProfit | 305,396 us-gaap_GrossProfit |
Net income attributable to the Company | $ 8,000 us-gaap_NetIncomeLoss | $ 11,800 us-gaap_NetIncomeLoss | $ 11,200 us-gaap_NetIncomeLoss | $ 10,600 us-gaap_NetIncomeLoss | $ 8,700 us-gaap_NetIncomeLoss | $ 4,700 us-gaap_NetIncomeLoss | $ (7,400)us-gaap_NetIncomeLoss | $ 11,500 us-gaap_NetIncomeLoss | $ 8,200 us-gaap_NetIncomeLoss | $ 9,500 us-gaap_NetIncomeLoss | $ (33,700)us-gaap_NetIncomeLoss | $ 47,000 us-gaap_NetIncomeLoss | $ 41,569 us-gaap_NetIncomeLoss | $ 17,517 us-gaap_NetIncomeLoss | $ 30,977 us-gaap_NetIncomeLoss |
Basic earnings per share | $ 0.26 us-gaap_EarningsPerShareBasic | $ 0.37 us-gaap_EarningsPerShareBasic | $ 0.35 us-gaap_EarningsPerShareBasic | $ 0.33 us-gaap_EarningsPerShareBasic | $ 0.27 us-gaap_EarningsPerShareBasic | $ 0.15 us-gaap_EarningsPerShareBasic | $ (0.23)us-gaap_EarningsPerShareBasic | $ 0.36 us-gaap_EarningsPerShareBasic | $ 0.27 us-gaap_EarningsPerShareBasic | $ 0.30 us-gaap_EarningsPerShareBasic | $ (1.08)us-gaap_EarningsPerShareBasic | $ 1.50 us-gaap_EarningsPerShareBasic | $ 1.31 us-gaap_EarningsPerShareBasic | $ 0.55 us-gaap_EarningsPerShareBasic | $ 0.99 us-gaap_EarningsPerShareBasic |
Diluted earnings per share | $ 0.25 us-gaap_EarningsPerShareDiluted | $ 0.37 us-gaap_EarningsPerShareDiluted | $ 0.35 us-gaap_EarningsPerShareDiluted | $ 0.33 us-gaap_EarningsPerShareDiluted | $ 0.27 us-gaap_EarningsPerShareDiluted | $ 0.15 us-gaap_EarningsPerShareDiluted | $ (0.23)us-gaap_EarningsPerShareDiluted | $ 0.36 us-gaap_EarningsPerShareDiluted | $ 0.26 us-gaap_EarningsPerShareDiluted | $ 0.30 us-gaap_EarningsPerShareDiluted | $ (1.08)us-gaap_EarningsPerShareDiluted | $ 1.49 us-gaap_EarningsPerShareDiluted | $ 1.30 us-gaap_EarningsPerShareDiluted | $ 0.55 us-gaap_EarningsPerShareDiluted | $ 0.97 us-gaap_EarningsPerShareDiluted | [1]
Cash dividends per share | $ 0.16 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.16 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.16 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.15 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.15 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.15 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.15 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.14 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.14 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.14 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.14 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.13 us-gaap_CommonStockDividendsPerShareCashPaid |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class A Common Stock prices: | $ 38.15 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 38.53 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 38.01 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 37.59 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 37.25 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 36.53 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 33.90 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 29.87 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 22.68 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 22.78 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 24.70 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember | $ 25.90 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class A Common Stock prices: | $ 32.46 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 34.04 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 33.67 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 32.85 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 33.81 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 32.27 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 27.48 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 23.21 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 20.11 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 17.66 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 17.15 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember | $ 22.35 ain_ClassaCommonStockPrice / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |
[1] | Due to a loss from continuing operations in 2012, the calculation of diluted income per share cannot be calculated by dividing net income by the diluted shares in the table above. See Statement of Income.

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