While PZN appears to be the surviving corporation (it actually isn't, as they both merged into a new corp - although I think PZN was treated as going first - can't remember and too lazy to look)for accounting purposes CCA is treated as the survivor (as if it bought PZN). Thus all of CCA's historical info will be used, and PZN's will disappear. (This is different than a pooling of interests where the combined histories are shown).
That reminds me. Somewhere there was discussion of the step-up of PZN's assets to appraised value, which would increase the depreciation. Unfortunately, while that is true for financial statements and reported FFO (reduces FFO), it's not true for tax purposes. Tax-wise this IS treated as a "pooling" (tax-free merger), so there is no step up and taxable income will be higher than book income. This may account for the high percentage (85%) of FFO to be paid out, since dividends are locked in at 95% of taxable income. The more that is paid out, the more equity that must be issued.
In the past, CCA went out of its way to get pooling treatment for its acquisitions. Now we get purchase accounting and the balance sheet looks stronger (forget the income statement). Ahhh...the topsy-turvy world of REITs.