  We present a uniform broadband X-ray (0.5-100.0 keV) spectral analysis of 12
Swift/Burst Alert Telescope (BAT) selected Compton-thick ($\log
N_{\mathrm{H}}/\mathrm{cm}^{-2} \geq 24$) Active Galactic Nuclei (CTAGNs)
observed with Suzaku. The Suzaku data of 3 objects are published here for the
first time. We fit the Suzaku and Swift spectra with models utilizing an
analytic reflection code and those utilizing the Monte Carlo based model from
an AGN torus by Ikeda et al. 2009. The main results are as follows. (1) The
estimated intrinsic luminosity of a CTAGN strongly depends on the model;
applying Compton scattering to the transmitted component in an analytic model
may largely overestimates the intrinsic luminosity at large column densities.
(2) Unabsorbed reflection components are commonly observed, suggesting that the
tori are clumpy. (3) Most of CTAGNs show small scattering fractions (<0.5%)
implying a buried AGN nature. (4) Comparison with the results obtained for
Compton-thin AGNs (Kawamuro et al. 2016) suggests that the properties of these
CTAGNs can be understood as a smooth extension from Compton-thin AGNs with
heavier obscuration; we find no evidence that the bulk of the population of
hard X-ray selected CTAGN is different from less obscured objects.
