Borrowings (Narrative) (Details) - USD ($)		12 Months Ended
	Apr. 15, 2015	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Short-term Debt [Line Items]
Short-term borrowings, weighted average rate		0.53%		0.35%
Short-term borrowings		$ 293,100,000		$ 334,804,000
Subordinated Notes Due April 15, 2030 [Member]
Short-term Debt [Line Items]
Cost related to issuance of debt		1,100,000
Proceeds from issuance of debt, net		$ 38,900,000
Principal amount	$ 40,000,000		$ 40,000,000
Interest rate	6.00%
Number of years at stated rate		10 years
Debt issuance cost amortization period		15 years
Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Short-term borrowings		$ 293,100,000		295,300,000
Federal Home Loan Bank Overnight Borrowings [Member]
Short-term Debt [Line Items]
Short-term borrowings		116,800,000		129,000,000
Federal Home Loan Borrowings Short Term Advances [Member]
Short-term Debt [Line Items]
Short-term borrowings		$ 176,300,000		$ 166,300,000
LIBOR [Member] | Subordinated Notes Due April 15, 2030 [Member]
Short-term Debt [Line Items]
Spread on variable rate	3.944%