BUSINESS COMBINATIONS (Pro Forma Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended			0 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 28, 2011 Mercer Insurance Group [Member]	Dec. 31, 2011 Mercer Insurance Group [Member]
Business Acquisition [Line Items]
Annualized revenues													$ 145,868
Revenues	228,994	223,024	219,719	205,305	213,317	206,581	199,646	193,699	877,042	813,243	705,008		109,043
Net loss	(26,526)	(11,725)	(15,496)	(22,393)	2,418	(8,730)	(14,716)	(19,184)	(76,140)	(40,212)	(11)		14,650
Pro Forma Historical Results
Revenue													741,833
Net income													8,139	[1]
Basic earnings per share (in usd per share)													$ 0.31
Diluted earnings per share (in usd per share)													$ 0.31
Transaction related expenses												$ 8,318	$ 11,900

[1] The year ended December 31, 2011 excludes transaction related expenses incurred that reduced net income by $11.9 million.