XML 122 R108.htm IDEA: XBRL DOCUMENT v3.3.1.900
Discontinued Operations and Divestitures - Gain on Disposals of Discontinued Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]                    
Gain on disposal of discontinued operations, before income tax expense               $ 1,510 $ 133 $ 107,533
Income tax expense               83 34 49,197
Gain on disposal of discontinued operations, net of tax $ (35) $ 1,172 $ 290 $ (7) $ 607 $ (27) $ (474) $ 1,427 $ 99 $ 58,336