v2.4.0.6

Income taxes (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
U.S. Federal: |  |  |
Current | $ 1,651 | $ 1,971 | $ 214
Deferred | 1,189 | 2,261 | (10,360)
Total U.S. Federal | 2,840 | 4,232 | (10,146)
U.S. state and local: |  |  |
Current | 327 | 1,092 | 1,193
Deferred | (202) | (1,260) | 50
Total U.S. state and local | 125 | (168) | 1,243
Reconciliation of amounts computed by applying the U.S. federal income tax rate to pretax income before income taxes |  |  |
Federal statutory rate (as a percent) | 34.00% | 34.00% | 34.00%
State and local (as a percent) | 1.10% | (0.70%) | 16.70%
Stock options (as a percent) | (2.60%) | 1.90% | 4.00%
Non-controlling interests (as a percent) | (2.20%) | (2.00%) | (2.60%)
Valuation allowance (as a percent) |  |  | (172.90%)
Other (as a percent) | (3.30%) | 3.80% | (2.60%)
Income taxes (as a percent) | 27.00% | 37.00% | (123.40%)
Foreign subsidiary deferred tax asset |  |  | 318
Deferred tax assets: |  |  |
Net operating loss carryforwards | 1,917 | 3,735 |
Outside basis differences for U.S. partnerships | 3,289 | 3,524 |
Stock options | 2,086 | 1,397 |
Deferred revenue | 873 | 1,014 |
Deferred compensation | 340 | 407 |
State taxes | 5 |  |
Other | 347 | 455 |
Valuation allowance | (1,669) | (1,822) | (3,109)
Net deferred tax assets | 7,188 | 8,710 |
Deferred tax liabilities: |  |  |
Intangible assets | (1,539) | (1,202) |
State taxes |  | (926) |
Property and equipment | (189) | (133) |
Net deferred tax liabilities | (1,728) | (2,261) |
Net deferred taxes | 5,460 | 6,449 |
Net operating loss carryforwards |  |  |
Amount of net operating loss carryforwards | 5,146 |  |
Release to the valuation allowance | 51 |  | 400
Period of cumulative results for determination of releasing valuation allowance | 3 years |  |
Changes in the valuation allowance |  |  |
Balance at the beginning of the period | 1,822 | 3,109 | 14,989
Additions charged to operations | 51 |  | 400
Decrease credited to operations | (204) | (1,287) | (12,280)
Balance at the end of the period | 1,669 | 1,822 | 3,109
Windfall tax benefits from stock option exercises | 2,190 | 246 |
Federal |  |  |
Net operating loss carryforwards |  |  |
Amount of net operating loss carryforwards | 15,283 | 7,979 |
Release to the valuation allowance |  |  | 12,280
Changes in the valuation allowance |  |  |
Additions charged to operations |  |  | 12,280
State |  |  |
Net operating loss carryforwards |  |  |
Amount of net operating loss carryforwards | 29,955 | 27,900 |
Release to the valuation allowance |  | 1,287 |
Changes in the valuation allowance |  |  |
Additions charged to operations |  | 1,287 |
Foreign |  |  |
Net operating loss carryforwards |  |  |
Amount of net operating loss carryforwards | $ 1,588 | $ 1,334 |

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