Is Scientific Games taking on too much Debt?

Scientific Games (SGMS) is trading near 52 week highs and in the last 5 trading sessions has traded as high as $43.90. Much of the company growth has occurred through leveraged buy outs in a hope to gain market dominance in the gaming industry. Some of these acquisitions include Williams Gaming (WMS), Bally Technologies (BYI), and newly announced NYX Gaming (NYX:CA).