Reserves for Unpaid Losses and Loss Adjustment Expenses (Activity in the Reserves for Unpaid Losses and Loss Adjustment Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reserves for Unpaid Losses and Loss Adjustment Expenses [Abstract]
Balance at January 1	$ 382,640	$ 313,416	$ 296,945
Less reinsurance recoverable	70,172	49,584	42,044
Net Balance at January 1	312,468	263,832	254,901
Incurred related to:
Current year	215,258	251,391	230,089
Prior years	(5,203)	9,954	(3,675)
Total incurred	210,055	261,345	226,414
Paid related to:
Current year	76,231	101,897	107,945
Prior years	123,100	110,812	109,538
Total paid	199,331	212,709	217,483
Net Balance at December 31	323,192	312,468	263,832
Plus reinsurance recoverable	91,943	70,172	49,584
Balance at December 31	$ 415,135	$ 382,640	$ 313,416