Supplemental Disclosure for Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Supplemental disclosures of cash flow information:
Interest paid	$ 108,970	$ 90,984
Net income taxes paid	2,658	2,212
Supplemental schedule of noncash investing and financing activities:
Transfer of loans and loans held for sale to OREO	6,651	2,718
Transfer of loans to loans held for sale	764,022	0
Change in unrealized gains on available for sale securities	99,372	31,958
Issuance of restricted stock, net of cancellations	$ (66)	$ 458