Repurchase Agreements (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Assets Sold under Agreements to Repurchase [Line Items]
Certificates of Deposit, at Carrying Value		$ 917	$ 914
Securities Sold under Agreements to Repurchase	[1]	230,612	215,041
Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	[1]	225,605	184,989
Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	[1]	0	0
30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	[1]	5,007	0
Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase	[1]	0	30,052
Commercial Borrower
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		5,007	30,052
Commercial Borrower | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Commercial Borrower | Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Commercial Borrower | 30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		5,007	0
Commercial Borrower | Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	30,052
Commercial Borrower | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		3,715	22,016
Commercial Borrower | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Commercial Borrower | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Commercial Borrower | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | 30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		3,715	0
Commercial Borrower | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	22,016
Commercial Borrower | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		1,292	8,036
Commercial Borrower | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Commercial Borrower | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Commercial Borrower | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | 30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		1,292	0
Commercial Borrower | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	8,036
Retail [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		225,605	184,989
Retail [Member] | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		225,605	184,989
Retail [Member] | Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | 30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | Obligations of states and political subdivisions [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase			556
Retail [Member] | Obligations of states and political subdivisions [Member] | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase			556
Retail [Member] | Obligations of states and political subdivisions [Member] | Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase			0
Retail [Member] | Obligations of states and political subdivisions [Member] | 30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase			0
Retail [Member] | Obligations of states and political subdivisions [Member] | Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase			0
Retail [Member] | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		117,784	95,967
Retail [Member] | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		117,784	95,967
Retail [Member] | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | 30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member] | Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		107,821	88,466
Retail [Member] | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | Overnight and Continuous
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		107,821	88,466
Retail [Member] | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | Up to 30 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | 30 - 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		0	0
Retail [Member] | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member] | Greater than 90 Days
Assets Sold under Agreements to Repurchase [Line Items]
Securities Sold under Agreements to Repurchase		$ 0	$ 0

[1] (1) Total repurchase agreements are presented within short-term borrowings on the consolidated statements of condition.