Schedule II - Condensed Financial Information Schedule II Statement of Cash Flows (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Cash Flow Statements, Captions [Line Items]
Net Income (Loss) Attributable to Parent	$ 41,013,000	$ 20,342,000	$ 9,705,000
Increase (Decrease) in Deferred Income Taxes	1,181,000	(1,150,000)	661,000
Share-based Compensation	649,000	133,000	55,000
Increase (Decrease) in Other Operating Assets	1,493,000	(28,000)	(2,238,000)
Increase (Decrease) in Other Operating Liabilities	(507,000)	19,769,000	1,978,000
Net Cash Provided by (Used in) Operating Activities	68,918,000	109,766,000	35,515,000
Payments to Acquire Property, Plant, and Equipment	(6,346,000)	(1,867,000)	(452,000)
Net Cash Provided by (Used in) Investing Activities	(91,466,000)	(146,154,000)	(27,097,000)
Payments Related to Tax Withholding for Share-based Compensation	110,000	0	0
Payments of Dividends	3,336,000	1,944,000	982,000
Proceeds from Issuance of Common Stock	54,041,000	3,591,000	23,947,000
Net Cash Provided by (Used in) Financing Activities	49,051,000	71,000	21,148,000
Cash and Cash Equivalents, Period Increase (Decrease)	26,503,000	(36,317,000)	29,566,000
Cash and Cash Equivalents, at Carrying Value	61,391,000	34,888,000	71,205,000
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net Income (Loss) Attributable to Parent	41,013,000	20,342,000	9,705,000
Increase (Decrease) in Deferred Income Taxes	44,000	49,000	54,000
Share-based Compensation	649,000	133,000	55,000
Increase (Decrease) in Other Operating Assets	548,000	(58,000)	(60,000)
Increase (Decrease) in Notes Payable, Related Parties	(47,033,000)	(1,687,000)	(5,931,000)
Increase (Decrease) in Other Operating Liabilities	(352,000)	341,000	26,000
Net Cash Provided by (Used in) Operating Activities	(6,315,000)	19,138,000	3,861,000
Payments to Acquire Interest in Subsidiaries and Affiliates	(36,608,000)	(20,785,000)	(26,826,000)
Payments to Acquire Property, Plant, and Equipment	(3,583,000)	0	0
Net Cash Provided by (Used in) Investing Activities	(40,191,000)	(20,785,000)	(26,826,000)
Payments Related to Tax Withholding for Share-based Compensation	110,000	0	0
Payments of Dividends	3,336,000	1,944,000	982,000
Proceeds from Issuance of Common Stock	54,041,000	3,591,000	23,947,000
Net Cash Provided by (Used in) Financing Activities	50,595,000	1,647,000	22,965,000
Cash and Cash Equivalents, Period Increase (Decrease)	4,089,000	0	0
Cash and Cash Equivalents, at Carrying Value	$ 4,097,000	$ 8,000	$ 8,000