Income Taxes (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2016

Dec. 31, 2015

Income Taxes

Schedule of reconciliation of unrecognized tax benefits

	Nine Months Ended September 30,
	2016						2015
			Interest						Interest
			and						and
(dollars in thousands)	Tax		Penalties		Total		Tax		Penalties		Total
Balance at January 1,	$	5,903	$	2,935	$	8,838	$	5,748	$	2,972	$	8,720
Additions for current year tax positions		6,268		1,117		7,385		504		—		504
Additions for Reorganization Transactions		115,877		5,459		121,336		—		—		—
Additions for prior years' tax positions:
Accrual of interest and penalties		—		95		95		—		132		132
Other		—		—		—		—		25		25
Reductions for prior years' tax positions:
Expiration of statute of limitations		(530)		(215)		(745)		(467)		(180)		(647)
Other		(12)		(1)		(13)		(31)		—		(31)
Balance at September 30,	$	127,506	$	9,390	$	136,896	$	5,754	$	2,949	$	8,703

	Year Ended December 31,
	2015						2014
					Interest						Interest
					and						and
(dollars in thousands)	Total		Tax		Penalties		Total		Tax		Penalties
Balance at beginning of year	$	8,720	$	5,748	$	2,972	$	8,477	$	5,433	$	3,044
Additions for current year tax positions		680		680		—		589		589		—
Additions for prior years’ tax positions:
Accrual of interest and penalties		178		—		178		542		—		542
Other		122		97		25		342		346		(4)
Reductions for prior years’ tax positions:
Expiration of statute of limitations		(862)		(622)		(240)		(1,230)		(620)		(610)
Balance at end of year	$	8,838	$	5,903	$	2,935	$	8,720	$	5,748	$	2,972