Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F3,F4	May 25, 2017	P	1,400	$19.85	A	2,216,949	I	See footnotes
Common Stock^F1,F2,F3,F4	May 25, 2017	P	100	$19.85	A	2,217,049	I	See footnotes
Common Stock^F1,F2,F3,F4	May 25, 2017	P	697	$19.8715	A	2,217,746	I	See footnotes
Common Stock^F1,F2,F3,F4	May 25, 2017	P	2,110	$19.8571	A	2,219,856	I	See footnotes
Common Stock^F1,F2,F3,F4	May 26, 2017	P	3,765	$19.8878	A	2,223,621	I	See footnotes
Common Stock^F1,F2,F3,F4	May 26, 2017	P	3,076	$19.8813	A	2,226,697	I	See footnotes
Common Stock^F1,F2,F3,F4	May 26, 2017	P	2,505	$19.8561	A	2,229,202	I	See footnotes

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1This Form 4 is filed by 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), LKCM Headwater Investments II, L.P. (HW), J. Luther King, Jr. and J. Bryan King (Reporting Persons). LKCM Private Discipline Management, L.P. holds the management shares of PDP, and LKCM Alternative Management, LLC (PDP GP) is its general partner. LKCM Investment Partnership GP, LLC (LIP GP) is the general partner of LIP. LKCM Micro-Cap Management, LLC (Micro GP) is the general partner of Micro. LKCM Core Discipline Management, L.P. (Core GP) is the general partner of Core. LKCM Headwater Investments II GP, L.P. (HW GP) is the general partner of HW.
F2LKCM is the investment manager for PDP, LIP, Micro, Core and HW. J. Luther King, Jr. is a controlling shareholder or member, as applicable, of LCKM and LIP GP. J. Bryan King is a controlling member of HW GP and a director of the issuer. J. Luther King, Jr. and J. Bryan King are controlling members of PDP GP, Micro GP and Core GP.
F3Includes (i) 1,689,358 shares held by PDP, (ii) 250,000 shares held by LIP, (iii) 26,102 shares held by Micro, (iv) 10,128 shares held by Core, (v) 247,326 shares held by HW, (vi) 2,500 shares held by a separately managed portfolio for which LKCM serves as investment adviser, and (vii) 3,788 restricted shares held by J. Bryan King.
F4Each of the Reporting Persons expressly disclaims membership in a group under the Securities Exchange Act of 1934, as amended, with respect to the securities reported herein, and this Form 4 shall not be deemed to be an admission that any such Reporting Person is a member of such a group. Each of the Reporting Persons 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 Reporting Person is the beneficial owner of such securities for purposes of the Securities Exchange Act of 1934, as amended, or for any other purpose.