Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F3	Jul 7, 2015	P	16,900	$23.4649	A	1,079,693	I	See footnotes
Common Stock^F1,F2,F3	Jul 7, 2015	P	100	$23.37	A	1,079,793	I	See footnotes
Common Stock^F1,F2,F3	Jul 7, 2015	P	9,756	$23.4336	A	1,089,549	I	See footnotes
Common Stock^F1,F2,F3	Jul 8, 2015	P	502	$23.4811	A	1,090,051	I	See footnotes
Common Stock^F1,F2,F3	Jul 8, 2015	P	197	$23.50	A	1,090,248	I	See footnotes
Common Stock^F1,F2,F3	Jul 8, 2015	P	3,700	$23.4647	A	1,093,948	I	See footnotes
Common Stock^F1,F2,F3	Jul 8, 2015	P	7,100	$23.4858	A	1,101,048	I	See footnotes
Common Stock^F1,F2,F3	Jul 8, 2015	P	3,418	$23.4824	A	1,104,466	I	See footnotes

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1This Form 4 is filed on behalf of Luther King Capital Management Corporation (LKCM), LKCM Private Discipline Master Fund, SPC (PDP), LKCM Investment Partnership, L.P. (LIP), LKCM Micro-Cap Partnership, L.P. (Micro), LKCM Core Discipline, L.P. (Core), J. Luther King, Jr. and J. Bryan King (collectively, Filing Persons). LKCM Private Discipline Management, L.P. holds the management shares of PDP, and LKCM Alternative Management, LLC (PD Alternative) is its general partner. LKCM Investment Partnership GP, LLC (LIP GP) is the general partner of LIP. LKCM Micro-Cap Management, L.P. (Micro GP) is the general partner of Micro. LKCM Core Discipline Management, L.P. (Core GP) is the general partner of Core. J. Luther King, Jr. is a controlling shareholder and/or member of LKCM and LIP GP. J. Luther King, Jr. and J. Bryan King are controlling members of PD Alternative, Micro GP and Core GP.
F2Includes (i) 877,398 shares held by PDP, (ii) 200,938 shares held by LIP, (iii) 17,824 shares held by Micro, (iv) 5,806 shares held by Core, and (v) 2,500 shares held by a separately managed portfolio for which LKCM serves as investment adviser.
F3Each of the Filing Persons expressly disclaims membership in a group under the Securities Exchange Act of 1934 with respect to the securities reported herein, and this Form 4 shall not be deemed to be an admission that any such Filing Person is a member of such a group. Each of the Filing Persons hereby expressly disclaims beneficial ownership of the securities reported herein, except to the extent of its pecuniary interest therein, and this Form 4 shall not be deemed to be an admission that any such Filing Person is the beneficial owner of the securities reported herein for purposes of the Securities Exchange Act of 1934 or for any other purpose.