Borrowings Schedule of Other Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	May 31, 2015
Schedule of Other Borrowings [Abstract]
Long-term Federal Home Loan Bank Advances	$ 329,320	$ 181,394	$ 81,469
nonrevolving line of credit	25,000	25,000	25,000
Other Securities Sold under Agreements to Repurchase	17,277	17,453	23,649
Subordinated Debt	0	18,544	18,372	$ 18,600
Other Borrowings	$ 371,597	$ 242,391	$ 148,490