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Stock-based Compensation | 6 Months Ended
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Jun. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-based Compensation | 10. Stock-based Compensation The Company has an Omnibus Incentive and Equity Plan (the “Plan”) under which officers, employees and directors may be granted equity-based awards, including restricted stock units (“RSUs”), stock options and unrestricted shares of common stock. At June 30, 2013, 493,104 shares of common stock remain available for issuance of the 1,800,000 shares that were reserved for issuance under the Plan. Each RSU entitles the holder to one share of Virtus common stock when the restriction expires. RSUs generally have a term of three years and may be time-vested or performance-contingent. Stock options generally vest over three years and have a contractual life of ten years. Stock options are granted with an exercise price equal to the fair market value of the shares at the date of grant. The fair value of each RSU is estimated using the intrinsic value method, which is based on the fair market value price on the date of grant. Shares that are issued upon exercise of employee stock options and vesting of RSUs are newly issued shares and not issued from treasury stock. Restricted Stock Units RSU activity for the six months ended June 30, 2013 is summarized as follows:
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at December 31, 2012 |  |  | 292,057 |  |  | $ | 57.89 |
Granted |  |  | 45,895 |  |  | $ | 188.38 |
Forfeited |  |  | (9,864 | ) |  | $ | 67.32 |
Settled |  |  | (86,741 | ) |  | $ | 41.75 |
Outstanding at June 30, 2013 |  |  | 241,347 |  |  | $ | 88.06 |
For the six months ended June 30, 2013, a total of 36,427 RSUs were withheld by the Company as a result of net share settlements to satisfy employee tax withholding obligations. During the six months ended June 30, 2013, the Company paid $7.2 million in employee tax withholding obligations related to the RSUs withheld. These net share settlements had the effect of share repurchases by the Company as they reduced the number of shares that would have been otherwise issued as a result of the vesting. Stock Options Stock option activity for the six months ended June 30, 2013 is summarized as follows:
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Outstanding at December 31, 2012 |  |  | 220,349 |  |  | $ | 20.03 |
Exercised |  |  | (21,760 | ) |  | $ | 16.60 |
Forfeited |  |  | (363 | ) |  | $ | 55.18 |
Outstanding at June 30, 2013 |  |  | 198,226 |  |  | $ | 20.34 |
During the three months ended June 30, 2013 and 2012, the Company recognized $2.6 million and $2.1 million, respectively, in total stock-based compensation expense. During the six months ended June 30, 2013 and 2012, the Company recognized $4.0 million and $3.7 million, respectively, in total stock-based compensation expense. As of June 30, 2013, unamortized stock-based compensation expense for unvested RSUs and stock options was $13.3 million and $0.1 million, respectively, with weighted-average remaining amortization periods of 1.5 years and 0.6 years, respectively.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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