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Fair Value Measurements (Detail) (USD $)
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3 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2012
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Jul. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
|
Jun. 30, 2012
Territory Ahead [Member]
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Sep. 30, 2012
Secured credit agreement expiring April 24, 2017 [Member]
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Sep. 30, 2011
Secured credit agreement terminated April 24, 2012 [Member]
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Dec. 31, 2011
Level 1 [Member]
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Sep. 30, 2011
Level 1 [Member]
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Dec. 31, 2011
Level 2 [Member]
|
Sep. 30, 2011
Level 2 [Member]
|
Sep. 30, 2012
Level 2 [Member]
Secured credit agreement expiring April 24, 2017 [Member]
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Sep. 30, 2011
Level 2 [Member]
Secured credit agreement terminated April 24, 2012 [Member]
|
Dec. 31, 2011
Level 3 [Member]
|
Sep. 30, 2011
Level 3 [Member]
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| Fair Value Measurements Of Financial Instruments [Line Items] | |||||||||||||||
| Senior Notes, Carrying Value | $ 240,000,000 | $ 240,000,000 | $ 240,000,000 | ||||||||||||
| Senior Notes, Fair Value | 264,000,000 | 264,000,000 | 264,000,000 | 264,000,000 | |||||||||||
| Term Loan, Fair Value | 250,000,000 | 250,000,000 | 69,841,000 | ||||||||||||
| Term Loan, Fair Value | 250,000,000 | 69,609,000 | 250,000,000 | 69,609,000 | |||||||||||
| Impairment charge | 5,900,000 | ||||||||||||||
| Impairment charge, net of tax | $ 3,700,000 |