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Share-Based Compensation and Cash-Based Incentive Compensation (Narrative) (Detail) (USD $)
In Millions, except Share data, unless otherwise specified |
6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 10 Months Ended | 12 Months Ended | 6 Months Ended | 6 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Jun. 30, 2012
Earnings Per Share Targets
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Jun. 30, 2012
Total Shareholder Return
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Jun. 30, 2012
London Interbank Offered Rate
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Dec. 31, 2012
Subsequent Event
Earnings Per Share Targets
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Oct. 31, 2014
Subsequent Event
Total Shareholder Return
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Dec. 31, 2013
Subsequent Event
Total Shareholder Return
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Dec. 31, 2012
Subsequent Event
Total Shareholder Return
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Jun. 30, 2012
Minimum
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Jun. 30, 2012
Maximum
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Jun. 30, 2012
Directors Compensation Plan
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Jun. 30, 2012
Restricted Stock
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Jun. 30, 2011
Restricted Stock
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Jun. 30, 2012
Restricted Stock Units (RSUs)
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Common stock available for award under the plans | 2,269,745 | 546,829 | ||||||||||||||
| Shares granted, grant date fair value | $ 0.4 | $ 0.5 | ||||||||||||||
| Shares Vested, grant date fair value | 0.5 | 0.6 | ||||||||||||||
| Percentage of employees specified performance requirements | 100.00% | 100.00% | 100.00% | 70.00% | 10.00% | 10.00% | 10.00% | |||||||||
| Restricted stock units earning per share, minimum | 0.00% | 0.00% | ||||||||||||||
| Restricted stock units earning per share, maximum | 100.00% | 150.00% | ||||||||||||||
| Expected vesting date | Dec. 15, 2014 | Dec. 15, 2012 | Dec. 15, 2013 | |||||||||||||
| Risk-free interest rate, minimum | 0.15% | |||||||||||||||
| Risk-free interest rate, maximum | 0.72% | |||||||||||||||
| Expected volatility, minimum | 33.00% | |||||||||||||||
| Expected volatility, maximum | 74.00% | |||||||||||||||
| Expected dividend yield, minimum | 0.00% | |||||||||||||||
| Expected dividend yield, maximum | 2.50% | |||||||||||||||
| Correlation of movement of total shareholder return maximum range | (67.00%) | 94.00% | ||||||||||||||
| Unrecognized share-based compensation expense | $ 0.8 | $ 16.7 | ||||||||||||||
| Recognition period for unrecognized compensation expense | April 2015 | November 2014 | ||||||||||||||