Income Taxes - Income Tax Expense Components and Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
Federal	$ 9,424	$ 14,384	$ 66,810
State	13,251	237	11,402
Foreign	4,435	5,484	5,350
Total current	27,110	20,105	83,562
Deferred
Federal	54,858	(62,913)	28,629
State	3,722	9,340	4,425
Foreign	406	(156)	(88)
Total deferred	58,986	(53,729)	32,966
Total
Federal, Total	64,282	(48,529)	95,439
State, Total	16,973	9,577	15,827
Foreign, Total	4,841	5,328	5,262
Total	$ 86,096	$ (33,624)	$ 116,528
Reconciliation of effective income tax rate from the federal income tax rate
Federal income tax rate (as a percent)	21.00%	35.00%	35.00%
Increase (decrease) resulting from:
State income tax, net of federal income tax (as a percent)	3.34%	3.92%	3.04%
Tax-exempt income (as a percent)	(1.64%)	(3.86%)	(2.07%)
Stock compensation (as a percent)	(0.64%)	(1.15%)	0.00%
Non-controlling interest tax effect (as a percent)	(0.59%)	(1.45%)	(0.99%)
Investments in affordable housing limited liability entities (as a percent)	(0.34%)	(0.89%)	(0.24%)
Foreign tax effects (as a percent)	0.26%	(0.67%)	(0.50%)
Tax Reform effects, net (as a percent)	(0.26%)	(53.29%)	0.00%
Nondeductible goodwill impairment effect (as a percent)	0.00%	10.43%	0.00%
State tax settlements, net of federal tax (as a percent)	0.00%	(1.38%)	0.19%
Other, net (as a percent)	0.30%	(0.38%)	0.02%
Effective income tax rate (as a percent)	21.43%	(13.72%)	34.45%