Income Taxes - Income Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Federal	$ 3,225	$ 10,122	$ (6,306)
State	(2,900)	2,248	(947)
Total current provision (benefit)	325	12,370	(7,253)
Deferred
Federal	(8,871)	(45,416)	(28,968)
State	(1,265)	(6,826)	(4,356)
Total deferred benefit	(10,136)	(52,242)	(33,324)
Total benefit from income taxes	(3,701)	(36,303)	(33,264)
REI Segment [Member]
Deferred
Total benefit from income taxes	$ 6,110	$ 3,569	$ 7,313