As many as 160 Applebee's and IHOP locations to close

Some 105 to 135 Applebee's restaurants will close, up from the 40 to 60 that parent DineEquity said would close in the first quarter. Also on the chopping block are an estimated 20 to 25 IHOP sites, up from about 18. 

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The casual-dining segment, where both chains are positioned, is experiencing increased troubles as more customers have gravitated to the quick-service restaurants like Panera Bread or Chipotle Mexican Grill, many of which market themselves as offering healthier and more upscale food.