FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
ASSETS:
Interest rate swap	$ 828	$ 33
Cash flow hedges	33
Available for sale securities, estimated fair value	1,095,636	677,348
LIABILITIES:
Interest rate swap	828	33
Cash flow hedges	5,049	3,562
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
ASSETS:
Interest rate swap
Cash flow hedges
Available for sale securities, estimated fair value
LIABILITIES:
Interest rate swap
Cash flow hedges
Significant Other Observable Inputs Level 2 [Member]
ASSETS:
Interest rate swap	828	33
Cash flow hedges	33
Available for sale securities, estimated fair value	1,095,636	677,348
LIABILITIES:
Interest rate swap	828	33
Cash flow hedges	5,049	3,562
Significant Unobservable Inputs Level 3 [Member]
ASSETS:
Interest rate swap
Cash flow hedges
Available for sale securities, estimated fair value
LIABILITIES:
Interest rate swap
Cash flow hedges
Recurring [Member]
ASSETS:
Interest rate swap	828	33
Cash flow hedges	33
LIABILITIES:
Interest rate swap	828	33
Cash flow hedges	5,049	3,562
Recurring [Member] | Interest Rate Lock Commitments [Member]
ASSETS:
Derivative assets	612
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
ASSETS:
Interest rate swap
Cash flow hedges
LIABILITIES:
Interest rate swap
Cash flow hedges
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Interest Rate Lock Commitments [Member]
ASSETS:
Derivative assets
Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
ASSETS:
Interest rate swap	828	33
Cash flow hedges	33
LIABILITIES:
Interest rate swap	828	33
Cash flow hedges	5,049	3,562
Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
ASSETS:
Interest rate swap
Cash flow hedges
LIABILITIES:
Interest rate swap
Cash flow hedges
Recurring [Member] | Significant Unobservable Inputs Level 3 [Member] | Interest Rate Lock Commitments [Member]
ASSETS:
Derivative assets	612
US Government Agencies Debt Securities [Member]
ASSETS:
Available for sale securities, estimated fair value	1,931	2,153
US Government Agencies Debt Securities [Member] | Recurring [Member]
ASSETS:
Available for sale securities, estimated fair value	1,931	2,153
US Government Agencies Debt Securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
ASSETS:
Available for sale securities, estimated fair value
US Government Agencies Debt Securities [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
ASSETS:
Available for sale securities, estimated fair value	1,931	2,153
US Government Agencies Debt Securities [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
ASSETS:
Available for sale securities, estimated fair value
Obligations of States and Political Subdivisions [Member]
ASSETS:
Available for sale securities, estimated fair value	435,657	254,830
Obligations of States and Political Subdivisions [Member] | Recurring [Member]
ASSETS:
Available for sale securities, estimated fair value	435,657	254,830
Obligations of States and Political Subdivisions [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
ASSETS:
Available for sale securities, estimated fair value
Obligations of States and Political Subdivisions [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
ASSETS:
Available for sale securities, estimated fair value	435,657	254,830
Obligations of States and Political Subdivisions [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
ASSETS:
Available for sale securities, estimated fair value
Corporate and Other Bonds [Member]
ASSETS:
Available for sale securities, estimated fair value	78,899	9,434
Corporate and Other Bonds [Member] | Recurring [Member]
ASSETS:
Available for sale securities, estimated fair value	78,899	9,434
Corporate and Other Bonds [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
ASSETS:
Available for sale securities, estimated fair value
Corporate and Other Bonds [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
ASSETS:
Available for sale securities, estimated fair value	78,899	9,434
Corporate and Other Bonds [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
ASSETS:
Available for sale securities, estimated fair value
Mortgage Backed Securities [Member]
ASSETS:
Available for sale securities, estimated fair value	569,328	407,362
Mortgage Backed Securities [Member] | Recurring [Member]
ASSETS:
Available for sale securities, estimated fair value	569,328	407,362
Mortgage Backed Securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
ASSETS:
Available for sale securities, estimated fair value
Mortgage Backed Securities [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
ASSETS:
Available for sale securities, estimated fair value	569,328	407,362
Mortgage Backed Securities [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
ASSETS:
Available for sale securities, estimated fair value
Other Securities [Member]
ASSETS:
Available for sale securities, estimated fair value	9,821	3,569
Other Securities [Member] | Recurring [Member]
ASSETS:
Available for sale securities, estimated fair value	9,821	3,569
Other Securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
ASSETS:
Available for sale securities, estimated fair value
Other Securities [Member] | Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
ASSETS:
Available for sale securities, estimated fair value	9,821	3,569
Other Securities [Member] | Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
ASSETS:
Available for sale securities, estimated fair value