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Share Repurchases (Details) (USD $)
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9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | ||||
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Dec. 31, 2012
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Dec. 31, 2011
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May 31, 2011
Class A Common Stock [Member]
February 2010 authorization [Member]
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Feb. 28, 2010
Class A Common Stock [Member]
February 2010 authorization [Member]
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Dec. 31, 2011
Class A Common Stock [Member]
February 2010 authorization [Member]
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Dec. 31, 2011
Class A Common Stock [Member]
February 2010 authorization [Member]
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Aug. 31, 2011
Class A Common Stock [Member]
August 2011 authorization [Member]
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Dec. 31, 2012
Class A Common Stock [Member]
August 2011 authorization [Member]
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Dec. 31, 2012
Class A Common Stock [Member]
August 2011 authorization [Member]
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Dec. 31, 2012
Class A Common Stock [Member]
Outside of Publically Announced Repurchase Program [Member]
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Dec. 31, 2011
Class A Common Stock [Member]
Outside of Publically Announced Repurchase Program [Member]
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Dec. 31, 2012
Class A Common Stock [Member]
Outside of Publically Announced Repurchase Program [Member]
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Dec. 31, 2011
Class A Common Stock [Member]
Outside of Publically Announced Repurchase Program [Member]
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May 31, 2011
Class B Common Stock [Member]
February 2010 authorization [Member]
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| Share Repurchases (Textual) [Abstract] | ||||||||||||||
| Stock Repurchase Program | $ 10,000,000 | $ 20,000,000 | ||||||||||||
| Payment for repurchase of class A common stock | 12,642,000 | 12,553,000 | 3,400,000 | |||||||||||
| Treasury stock repurchased | 1,000,000 | 1,800,000 | 4,400,000 | 1,400,000 | 5,600,000 | 0 | 0 | 124,404 | 113,734 | |||||
| Conversion of Stock, Shares Converted | 618,664 | |||||||||||||
| Treasury stock acquired volume weighted-average price | $ 3.43 | $ 2.09 | $ 2.76 | $ 2.04 | $ 2.20 | $ 2.36 | $ 3.52 | |||||||
| Stock repurchase program remaining authorization | $ 100,000 | $ 100,000 | ||||||||||||