Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Income Taxes

Schedule of reconciliation of unrecognized tax benefits

	Three Months Ended March 31,
	2018						2017
			Interest						Interest
			and						and
(dollars in thousands)	Tax		Penalties		Total		Tax		Penalties		Total
Balance at January 1,	$	130,619	$	10,660	$	141,279	$	127,085	$	9,965	$	137,050
Additions for current year tax positions		354		—		354		199		—		199
Additions for prior years' tax positions:
Accrual of interest and penalties		—		242		242		—		71		71
Reductions for prior years' tax positions:
Expiration of statute of limitations		(70)		(32)		(102)		(127)		(51)		(178)
Other		(257)		—		(257)		—		—		—
Balance at March 31,	$	130,646	$	10,870	$	141,516	$	127,157	$	9,985	$	137,142