Income Taxes - Income Tax Expense (Benefit) from Continuing Operations, Less Noncontrolling Interest (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 12,563	$ 18,094	$ 10,195
State	2,371	3,232	1,916
Total Current	14,934	21,326	12,111
Deferred:
Federal	6,223	1,389	2,187
State	1,019	133	215
Total Deferred	7,242	1,522	2,402
Total Income Tax Expense	$ 22,176	$ 22,848	$ 14,513