Note Borrowings (Borrowings by contractual maturities) (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Debt Disclosure
2019	$ 289,420
2020	202,264
2021	20,040
2022	103,147
2023	297,617
Later years	464,913
Total borrowings	1,377,401
Assets Sold Under Agreements To Repurchase
Debt Disclosure
2019	138,756
2020	62,115
2021	0
2022	0
2023	0
Later years	0
Total borrowings	200,871
Other Short Term Borrowings
Debt Disclosure
2019	42
2020	0
2021	0
2022	0
2023	0
Later years	0
Total borrowings	42
Notes Payable
Debt Disclosure
2019	150,622
2020	140,149
2021	20,040
2022	103,147
2023	297,617
Later years	464,913
Total borrowings	$ 1,176,488