Approved mergers rise by 30 from Q1 to Q2; California sees the highest number of mergers.
The NCUA approves 71 mergers in Q2 2015, up from 41 in Q1.
Two of the largest mergers occur in California and Minnesota.
The federal regulator approved just 17 mergers in November 2013, lower than previous months and the 23 approved in November 2012.
Agency says 190 so far this year among federally insured credit unions.
Montgomery County Credit Union leaders pin woes on mismanagement.