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Share Repurchases (Details) (USD $)
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6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 1 Months Ended | ||||||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2011
February 2010 authorization [Member]
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Sep. 30, 2011
February 2010 authorization [Member]
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Sep. 30, 2012
August 2011 authorization [Member]
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Sep. 30, 2012
August 2011 authorization [Member]
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Sep. 30, 2012
Outside of Publically Announced Repurchase Program [Member]
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Sep. 30, 2011
Outside of Publically Announced Repurchase Program [Member]
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Sep. 30, 2012
Outside of Publically Announced Repurchase Program [Member]
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Sep. 30, 2011
Outside of Publically Announced Repurchase Program [Member]
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May 31, 2011
Class A Common Stock [Member]
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Feb. 28, 2010
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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May 31, 2011
Class B Common Stock [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 | 9,826,000 | 8,825,000 | 3,400,000 | |||||||||||
| Treasury stock repurchased under publically announced repurchase programs | 4,200,000 | 900,000 | 2,600,000 | 2,100,000 | 0 | 0 | 1,000,000 | 618,664 | ||||||
| Treasury stock acquired volume weighted-average price | $ 2.71 | $ 3.21 | $ 2.24 | $ 2.25 | $ 2.36 | $ 3.52 | $ 3.43 | |||||||
| Stock repurchase program remaining authorization | $ 3,000,000 | $ 3,000,000 | ||||||||||||
| Treasury stock repurchased outside of publically announced repurchase program for tax withholding | 124,404 | 113,734 | ||||||||||||
| Share Repurchases (Additional Textual) [Abstract] | ||||||||||||||
| Number of daily trading session represented volume weighted average price description | The Company paid a total of $3.4 million or approximately $3.43 per share, which represented the volume weighted-average price of the Company's Class A Common Stock for the three daily trading sessions on May 23, 24 and 25, 2011, as reported on the NASDAQ Global Select Market. | |||||||||||||