Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
Atlas has the following future minimum rentals, related principally to office space, required under operating leases having initial or remaining noncancelable lease terms in excess of one year as of December 31, 2014 (all amounts in '000s):
Year
2015
2016
2017
2018
2019 & Beyond
Total
Amount
$
1,186

$
845

$
281

$

$

$
2,312