Stockholder's Equity

Accumulated Other Comprehensive Income

The components of AOCI consisted of the following for the periods presented:



	September 30, 2018			March 31, 2018
Foreign Currency Translation Adjustment	$	(887	)	$	3,379
Derivative Instruments	(469		)	52
Defined Benefit Pension	(11,212		)	(11,423		)
Accumulated other comprehensive income	$	(12,568	)	$	(7,992	)

Common Stock Repurchases

The following table presents information about the Company's common stock repurchases:



	Three-months ended				Six-months ended
	September 30				September 30
	2018		2017		2018		2017
Shares of common stock purchased	1,117		—		48,761		44,507
Aggregate purchase price	$	2	$	—	$	114	$	393
Average purchase price	$	1.46	$	—	$	2.33	$	8.84

During the six-months ended September 30, 2018, the Company made tax payments of $114 and withheld 48,761 shares of common stock, which were designated as treasury shares, at an average price per share of $2.33, in order to satisfy employee income taxes due as a result of the vesting of certain restricted stock units. During the six-months ended September 30, 2017, the Company made tax payments of $393 and withheld 44,507 shares of common stock, which were designated as treasury shares, at an average price per share of $8.84, in order to satisfy employee income taxes due as a result of the vesting of certain restricted stock units.

Since the inception of its repurchase programs beginning in April 1999 and through September 30, 2018, the Company has repurchased 11,392,851 shares of common stock for an aggregate purchase price of $408,621, or an average purchase price per share of $35.87. These shares do not include the treasury shares withheld for tax payments due upon the vesting of certain restricted stock units and performance shares. As of September 30, 2018, 1,107,149 shares were available under the most recent repurchase programs.

Under the Second Amended Credit Agreement, the Company is no longer permitted to repurchase common stock through its repurchase program but is allowed to repurchase a limited amount of shares for tax payments related to the vesting of certain restricted stock units and performance shares, as applicable. This restriction is in effect until May 9, 2021, the termination date of the Second Amended Credit Agreement. See Note 6 for additional information regarding our Second Amended Credit Agreement.