Arvest Bank Closes Deal to Buy Union Bank of Kansas City by Rob Keys Posted 6/26/2012 11:23 am Updated 6 years ago Arvest Bank completes its purchase of Union Bank of Kansas City, announced in January. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 15 days. Purchase Now Already have archive access? Login to view this article.