Fair Value (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Carrying amount and estimated fair value of financial instruments
Securities available-for-sale	$ 912,495		$ 914,560
Restricted stock	21,064		21,057
FDIC Indemnification Asset	420	754	1,055	2,632
Accrued interest receivable	10,950		11,554
Deposits	(2,433,083)		(2,458,791)
Level 1
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	19,048		22,455
Federal funds sold	0		0
Securities available-for-sale	0		0
Loans, net	0		0
FDIC Indemnification Asset	0		0
Accrued interest receivable	0		0
Deposits	0		0
Short-term borrowings	0		0
Federal Home Loan Bank advances	0		0
Accrued interest payable	0		0
Level 2
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	65,726		48,578
Federal funds sold	9,370		4,276
Securities available-for-sale	893,839		900,991
Loans, net	0		0
FDIC Indemnification Asset	420		1,055
Accrued interest receivable	3,292		3,279
Deposits	(2,433,594)		(2,460,197)
Short-term borrowings	(73,420)		(59,592)
Federal Home Loan Bank advances	(63,932)		(60,258)
Accrued interest payable	(544)		(750)
Level 3
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	0		0
Federal funds sold	0		0
Securities available-for-sale	18,656		13,569
Loans, net	1,825,140		1,816,726
FDIC Indemnification Asset	0		0
Accrued interest receivable	7,658		8,275
Deposits	0		0
Short-term borrowings	0		0
Federal Home Loan Bank advances	0		0
Accrued interest payable	0		0
Carrying Value
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	84,774		71,033
Federal funds sold	9,370		4,276
Securities available-for-sale	912,495		914,560
Restricted stock	21,064		21,057
Loans, net	1,774,407		1,771,360
FDIC Indemnification Asset	420		1,055
Accrued interest receivable	10,950		11,554
Deposits	(2,433,083)		(2,458,791)
Short-term borrowings	(73,420)		(59,592)
Federal Home Loan Bank advances	(63,140)		(58,288)
Accrued interest payable	(544)		(750)
Fair Value
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	84,774		71,033
Federal funds sold	9,370		4,276
Securities available-for-sale	912,495		914,560
Loans, net	1,825,140		1,816,726
FDIC Indemnification Asset	420		1,055
Accrued interest receivable	10,950		11,554
Deposits	(2,433,594)		(2,460,197)
Short-term borrowings	(73,420)		(59,592)
Federal Home Loan Bank advances	(63,932)		(60,258)
Accrued interest payable	$ (544)		$ (750)