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Stock-Based Compensation And Employee Stock Option Plan (Narrative) (Details) (USD $)
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12 Months Ended | 12 Months Ended | |||||||||||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Apr. 01, 2010
Executive Officer [Member]
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Dec. 31, 2012
Class A [Member]
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Dec. 31, 2010
Class A [Member]
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Dec. 31, 2010
Class A [Member]
Executive Officer [Member]
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Dec. 31, 2012
Class A [Member]
Employee Stock [Member]
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Dec. 31, 2012
Incremental Shares Issued [Member]
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Dec. 31, 2012
Minimum [Member]
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Dec. 31, 2012
Maximum [Member]
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Dec. 31, 2012
Restricted Stock [Member]
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Dec. 31, 2011
Restricted Stock [Member]
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Dec. 31, 2010
Restricted Stock [Member]
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Dec. 31, 2012
Restricted Stock [Member]
Executive Officer [Member]
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Dec. 31, 2011
Restricted Stock [Member]
Executive Officer [Member]
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Dec. 31, 2010
Restricted Stock [Member]
Executive Officer [Member]
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| Equity And Stock-Based Compensation [Line Items] | |||||||||||||||||
| Value of stock granted | $ 950,000 | $ 750,000 | $ 750,000 | ||||||||||||||
| Shares granted | 227,570 | 155,925 | 174,825 | 217,890 | 155,925 | 174,825 | |||||||||||
| Share price of stock granted | $ 4.36 | $ 4.81 | $ 4.29 | ||||||||||||||
| Restricted sale period | 5 years | ||||||||||||||||
| Restricted shares issued | 155,925 | ||||||||||||||||
| Shares issued, price per share | $ 4.81 | ||||||||||||||||
| Fair value of shares issued | 750,000 | ||||||||||||||||
| Stock issued | 95,000 | 90,000 | 5,154 | 9,680 | |||||||||||||
| Compensation expense | 285,000 | 189,000 | 67,000 | 44,000 | |||||||||||||
| Value of options vested | 100,000 | ||||||||||||||||
| Restricted stock expense | 994,000 | 750,000 | 754,000 | ||||||||||||||
| Value of incentive interest revoked | 0 | ||||||||||||||||
| Stock issued, exercise price | $ 4.68 | $ 2.76 | |||||||||||||||
| Options granted | 206,000 | 157,700 | |||||||||||||||
| Unrecognized estimated compensation cost related to non-vested stock options granted | 342,000 | ||||||||||||||||
| Recognition period of unrecognized compensation cost | 2 years 4 months 17 days | ||||||||||||||||
| Realized value of option exercised | 136,000 | 138,000 | 103,000 | ||||||||||||||
| Grant date fair value of options vesting | 285,000 | 189,000 | 67,000 | ||||||||||||||
| Cash received from exercise of stock options | 308,000 | 248,000 | |||||||||||||||
| Options exercised | 95,000 | 136,000 | 90,000 | 41,000 | |||||||||||||
| In the money shares exercise of options, net | 15,822 | ||||||||||||||||
| Exercise price per share | $ 2.76 | $ 4.01 | |||||||||||||||
| Market price per share | $ 6.53 | ||||||||||||||||
| Intrinsic unrealized value of all options outstanding, vested and expected to vest | $ 509,000 | ||||||||||||||||
| Percentage of option currently exercisable | 100.00% | ||||||||||||||||
| Expiration period for stock options | 10 years | ||||||||||||||||
| Common Stock authorized for issuance under 2010 Stock Incentive Plan | 1,250,000 | ||||||||||||||||
| Vesting period of stock options | 0 years | 4 years | |||||||||||||||
| Weighted average remaining contractual life of all options outstanding, vested, and expected to vest | 5 years 8 months 23 days | 4 years 1 month 17 days | |||||||||||||||
| Weighted average remaining contractual life of the exercisable options outstanding | 4 years 5 months 12 days | 3 years 10 months 6 days | |||||||||||||||