CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 61,719	$ 64,023	$ 10,509
Other comprehensive income (loss):
Interest rate swap gain (loss), net of reclassifications to earnings	(4,752)	5,004	(1,679)
Amortization of terminated interest rate swaps	3,667	2,737	898
Total other comprehensive income (loss)	(1,085)	7,741	(781)
Comprehensive income	$ 60,634	$ 71,764	$ 9,728