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CONSOLIDATED STATEMENT OF STOCKHOLDERS' INVESTMENT (PARENTHETICALS) (USD $)
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3 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2015
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Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 31, 2013
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| Statement of Stockholders' Equity [Abstract] | |||||||||||||||
| Cash dividends declared per common share | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.20 | $ 0.2 | $ 0.2 | $ 0.2 | $ 1.28 | $ 1 | $ 0.8 |