v3.3.1.900
Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Statement [Abstract]      
Operating revenues, net $ 804,228 $ 836,270 $ 856,500
Expenses:      
Direct expenses 687,050 670,007 713,090
Selling, general and administrative expenses 46,422 43,171 38,820
Total operating expenses 733,472 713,178 751,910
Loss (gain) on disposition of assets, net 339 848 (16,604)
Impairments of assets   10,508 1,648
Equity in loss of unconsolidated affiliate 306 96 262
Operating income 70,111 111,640 119,284
Interest expense 29,066 29,510 29,756
Loss on debt extinguishment   29,833  
Other income, net (2,211) (818) (613)
Total expenses 26,855 58,525 29,143
Earnings before income taxes 43,256 53,115 90,141
Income tax expense 16,332 20,427 31,185
Net earnings $ 26,924 $ 32,688 $ 58,956
Earnings per share:      
Basic $ 1.73 $ 2.11 $ 3.81
Diluted $ 1.72 $ 2.08 $ 3.77
Weighted average shares outstanding:      
Basic 15,566 15,483 15,474
Diluted 15,642 15,685 15,639