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Consolidated Statements of Equity (USD $) In Thousands | Total | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Noncontrolling Interest | Total Vicor Corporation Stockholders' Equity | Class B Common Stock | Common Stock
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2008 | $ 151,426 | $ 161,089 | $ 110,174 | $ (2,767) | $ (121,827) | $ 4,255 | $ 147,171 | $ 118 | $ 384
Noncontrolling interest dividends paid | (1,269) |  |  |  |  | (1,269) |  |  |
Stock-based compensation expense | 657 | 657 |  |  |  |  | 657 |  |
Net income | 4,093 |  | 2,798 |  |  | 1,295 | 2,798 |  |
Unrealized gain on investments | 1,223 |  |  | 1,223 |  |  | 1,223 |  |
Currency translation adjustments, net of tax of $30, $169 and $107 for the year ended 2009, 2010 and 2011 respectively | (64) |  |  | (64) |  |  | (64) |  |
Comprehensive income | 5,252 |  |  |  |  |  | 3,957 |  |
Balance at Dec. 31, 2009 | 156,066 | 161,746 | 112,972 | (1,608) | (121,827) | 4,281 | 151,785 | 118 | 384
Sales of Common Stock | 1,104 | 1,103 |  |  |  |  | 1,104 |  | 1
Common Stock dividends paid | (12,506) |  | (12,506) |  |  |  | (12,506) |  |
Noncontrolling interest dividends paid | (552) |  |  |  |  | (552) |  |  |
Excess tax benefit of share-based compensation | 213 | 213 |  |  |  |  | 213 |  |
Stock-based compensation expense | 871 | 871 |  |  |  |  | 871 |  |
Net income | 33,539 |  | 33,325 |  |  | 214 | 33,325 |  |
Unrealized gain on investments | (125) |  |  | (123) |  | (2) | (123) |  |
Currency translation adjustments, net of tax of $30, $169 and $107 for the year ended 2009, 2010 and 2011 respectively | 402 |  |  | 362 |  | 40 | 362 |  |
Comprehensive income | 33,816 |  |  |  |  | 252 | 33,564 |  |
Balance at Dec. 31, 2010 | 179,012 | 163,933 | 133,791 | (1,369) | (121,827) | 3,981 | 175,031 | 118 | 385
Sales of Common Stock | 493 | 491 |  |  |  |  | 493 |  | 2
Common Stock dividends paid | (6,272) |  | (6,272) |  |  |  | (6,272) |  |
Noncontrolling interest dividends paid | (690) |  |  |  |  | (690) |  |  |
Excess tax benefit of share-based compensation | 133 | 133 |  |  |  |  | 133 |  |
Stock-based compensation expense | 1,567 | 1,567 |  |  |  |  | 1,567 |  |
Liability stock option awards reclassified to equity | 103 | 103 |  |  |  |  | 103 |  |
Net income | 9,309 |  | 8,843 |  |  | 466 | 8,843 |  |
Unrealized gain on investments | 904 |  |  | 915 |  | (11) | 915 |  |
Currency translation adjustments, net of tax of $30, $169 and $107 for the year ended 2009, 2010 and 2011 respectively | 151 |  |  | 132 |  | 19 | 132 |  |
Comprehensive income | 10,364 |  |  |  |  | 474 | 9,890 |  |
Balance at Dec. 31, 2011 | $ 184,710 | $ 166,227 | $ 136,362 | $ (322) | $ (121,827) | $ 3,765 | $ 180,945 | $ 118 | $ 387

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