Equity	3 Months Ended
Mar. 31, 2019
Stockholders' Equity Note [Abstract]
Equity	Equity On March 20, 2019, a dividend of $0.05 per share was paid to stockholders of record on March 6, 2019. Dividends include dividend equivalent payments of $0.3 million, which were paid to holders of restricted stock units for both the three months ended March 31, 2019 and March 31, 2018. During the three months ended March 31, 2019, the Company repurchased 436,885 common shares through open market transactions at an average price of $26.68, for a total cost of $11.7 million. During the three months ended March 31, 2019, 1,219,545 restricted stock units vested and were settled in shares of common stock, of which the Company is deemed to have repurchased 499,786 shares at an average price of $25.50 per share for a total cost of $12.7 million in conjunction with the payment of tax liabilities in respect of stock delivered to its employees in settlement of restricted stock units. During the three months ended March 31, 2018, 918,073 restricted stock units vested and were settled in shares of common stock, of which the Company is deemed to have repurchased 361,453 shares at an average price of $18.40 per share for a total cost of $6.7 million in conjunction with the payment of tax liabilities in respect of stock delivered to its employees in settlement of restricted stock units. In connection with the acquisition of Cogent, the Company issued 779,454 shares of common stock on the acquisition date, April 1, 2015. In addition, the Company agreed to issue 334,048 shares of common stock shortly after the second or fourth anniversary of the Acquisition if a revenue target was achieved. The revenue target was met in the quarter ended September 30, 2018 and the common stock related to the Earnout will be issued shortly after the fourth anniversary of the acquisition. The fair value of the contingent issuance of common shares was valued on the date of the acquisition at $11.9 million and has been recorded as additional paid in capital in the condensed consolidated statements of financial condition. The par value of the shares will be transferred to common stock in the condensed consolidated statement of financial condition when the Earnout shares are issued to the sellers of Cogent. See “Note 4 — Fair Value of Financial Instruments”, “Note 8 — Earnings per Share” and “Note 12 — Subsequent Events”.

Equity

On March 20, 2019, a dividend of $0.05 per share was paid to stockholders of record on March 6, 2019. Dividends include dividend equivalent payments of $0.3 million, which were paid to holders of restricted stock units for both the three months ended March 31, 2019 and March 31, 2018.

During the three months ended March 31, 2019, the Company repurchased 436,885 common shares through open market transactions at an average price of $26.68, for a total cost of $11.7 million.

During the three months ended March 31, 2019, 1,219,545 restricted stock units vested and were settled in shares of common stock, of which the Company is deemed to have repurchased 499,786 shares at an average price of $25.50 per share for a total cost of $12.7 million in conjunction with the payment of tax liabilities in respect of stock delivered to its employees in settlement of restricted stock units.

During the three months ended March 31, 2018, 918,073 restricted stock units vested and were settled in shares of common stock, of which the Company is deemed to have repurchased 361,453 shares at an average price of $18.40 per share for a total cost of $6.7 million in conjunction with the payment of tax liabilities in respect of stock delivered to its employees in settlement of restricted stock units.

In connection with the acquisition of Cogent, the Company issued 779,454 shares of common stock on the acquisition date, April 1, 2015. In addition, the Company agreed to issue 334,048 shares of common stock shortly after the second or fourth anniversary of the Acquisition if a revenue target was achieved. The revenue target was met in the quarter ended September 30, 2018 and the common stock related to the Earnout will be issued shortly after the fourth anniversary of the acquisition. The fair value of the contingent issuance of common shares was valued on the date of the acquisition at $11.9 million and has been recorded as additional paid in capital in the condensed consolidated statements of financial condition. The par value of the shares will be transferred to common stock in the condensed consolidated statement of financial condition when the Earnout shares are issued to the sellers of Cogent. See “Note 4 — Fair Value of Financial Instruments”, “Note 8 — Earnings per Share” and “Note 12 — Subsequent Events”.