Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income	$ 10,724	$ 17,333	$ 28,348	$ 42,668
Other comprehensive income (loss), net of tax:
Amortization of actuarial losses, net of taxes of ($11) and ($41) for the three months ended September 30, 2019 and 2018, respectively and of ($30) and ($124) for the nine months ended September 30, 2019 and 2018, respectively.	22	91	66	272
Amortization of prior service credits, net of taxes of $7 and $3 for the three months ended September 30, 2019 and 2018, respectively and of $20 and $8 for the nine months ended September 30, 2019 and 2018, respectively.	(15)	(7)	(44)	(20)
Net unrealized (losses) gains on securities, net of taxes of $218 and $1,612 for the three months ended September 30, 2019 and 2018, respectively and of ($5,102) and $6,055 for the nine months ended September 30, 2019 and 2018, respectively.	(475)	(3,505)	11,349	(13,159)
Reclassification adjustment for net losses included in income, net of taxes of ($5) for the nine months ended September 30, 2019.	0	0	10	0
Net unrealized (losses) gains on cash flow hedges, net of taxes of $874 and ($860) for the three months ended September 30, 2019 and 2018, respectively and of $5,293 and ($4,425) for the nine months ended September 30, 2019 and 2018, respectively.	(1,946)	1,870	(11,782)	9,616
Change in fair value of liabilities related to instrument-specific credit risk, net of taxes of ($27) and ($4) for the three months ended September 30, 2019 and 2018, respectively and of ($81) and ($10) for the nine months ended September 30, 2019 and 2018, respectively.	61	9	184	22
Total other comprehensive loss, net of tax	(2,353)	(1,542)	(217)	(3,269)
Comprehensive income	$ 8,371	$ 15,791	$ 28,131	$ 39,399